Operating Instructions MA 41 - Medical Equipment Wholesaler
Contents
1. 24 5 3 MONItONNG PRI ae Ee ees TATA 25 SCIA 0 RR AR RARE 25 5 5 Documentation of the RESUlS iiiiia 26 5 6 Patient Vie SIGIN sor case tainted rane erano 27 8100456_Ol_MA41_EN_15a i 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 6 Quick Reference Guide cccccesccceececeseceeeeeeeeneeeeeeeceneeceseeeeeeeeneneseeeanes 29 6 1 General Seuil 29 DESIRE eri 29 6 1 2 MANS AUS Ola 29 6 1 3 Signal Siad 29 6 14 Maskihg accicssusntssacanaiacesehenatedececaccodensak pace lt tc btennieeas Eidin e EAEE 29 6 2 Tone and Speech AUCIOMEUY eosscccccnssasincdtiadassnandniadieiananenasaneaeecutansies 29 6 2 1 How to Select Tone or Speech Audiometry Mode 29 6 2 2 TONE AUCIOMEIY lt ccsscccuadecvadddarkcntuencsendsodnhddensdesdedieiuhonarsscsdaddedts 30 6 2 3 Speech Audiometry sia 31 6 2 4 Documentation of the Results rnn 31 7 User Mendel e 32 7 1 Set up Date and UNC PERRIN 37 7 2 Set Printer SELLING 38 SDIsIneciO Nail 39 9 Activation of Optional Features iiiiiii 39 10 Device Updates oil 39 11 Connection to the PGu sriaaa 40 12 Technical Datazione cri 42 13 Warranty Maintenance and After Sales Service 47 14 Safety Regulations uni 48 14 1 Electrical Safety RR E 48 14 2 Measuring SEM UY caiscayedeviesnseremissiaataneeascewtdervedezrunietemiagnateeninnaeiasees 49 14 3 Device ONTO 49 14A Opera tiO oases Sacer IE2. Operating Instructions MA 41 MAICO 30 dBHL Tone 1000 xz Noise 0 dBHL Phone Steady Phone 0 0 10 10 20 20 30 30 40 40 60 60 70 70 80 80 90 90 0 125 0 5 1 2 4 8 0 125 0 5 1 2 4 8 Figure 6 Tone Audiometry with Masking Adjust the level of the masking noise by the right hand level control dial If the Store button on either side of the instrument is pressed the hearing threshold value will be stored in the audiogram with the corresponding masking symbol The masking sound should be continuously presented for effective masking by pressing the STIM button You can interrupt the masking signal by pressing the corresponding stimulus button 2 Automatic Masking With the manual masking as described before the masking level should be adjusted every time you change the test signal level The MA 41 has a tracking function for easy masking Set the tone level and the masking level to a desired difference for effective masking Press the TRACK button 14 to implement the automatic masking feature The masking level is automatically changed if you adjust the test signal level e g if the test level is at 30 dBHL and the masking level 50 dBHL and you change the test level to 45 dBHL the masking level will automatically adjust to 65 dBHL 5 1 2 Bone Conduction Testing Place the bone conduction oscillator so that the flat circular side of the transducer is placed on the mastoid at the noticeable ledge of the cr
3. 5 1 1 1 Masking Masking is required if there is a notable threshold difference between the left and right ears It is possible for sound to be transmitted to both ears via bone conduction while testing the poorer ear This is called crossover Crossover occurs often while testing bone conduction but it can also occur during air conduction testing Relevant to crossover is the sound level received by the opposite ear The difference between the original test signal in the test ear and the received signal in the opposite ear is called interaural attenuation For bone conduction measurements the interaural attenuation is O to 15 cB Bone conduction crossover is therefore possible even with a slight difference in hearing loss between ears To ensure that the patient will not experience crossover mask the opposite ear Masking increases the hearing threshold of the opposite ear For bone conduction the masking signal is automatically routed to the opposite output of the phones or inserts The masking is done with a noise signal which is transmitted by the headphone For pure tone audiometry a narrowband noise is used This noise changes its center frequency according to the frequency of the test signal Manual Masking The masking is switched on by pressing the Masking On Off button 15 The channel of the non test ear is switched on and set to noise with a level of 0 dBHL 8100456_Ol_MA41_EN_15a 16 8100456 8 04 15
4. 2 4 8 0 125 0 5 1 2 4 8 0 5 1 Figure 5 Pure Tone Audiometry Screen Example 0 125 The default setting is the right channel set to air conduction pure tone and the left channel is switched off The frequency is automatically set at 1 000 Hz The audiometer provides one and a half channels one for the test signal and the other for the masking signal The test signal can be routed to the left right or both ears If masking is on the masking signal is routed to the non test ear Select the ear to be tested by pressing the functional selector button 9 on the control panel underneath the screen Press several times to toggle between Right Left and Both Next select the transducer to be used headphones Phones insert phones Insert bone conductor Bone or sound field speaker Speaker by pressing the appropriate button 10 Press the button several times until the LED indicates the required transducer Only calibrated transducers are available The level and frequency is displayed as a numerical value at the top of the screen and is also indicated by the cursor within the audiogram The dBHL can be changed with the attenuator dials on both sides 1 of the instrument 8100456_Ol_MA41_EN_15a 14 8100456 8 04 15 M A Operating Instructions MA 41 MAICO Use the frequency plus 4 or minus 5 keys to increase or decrease the frequency Press the STIM button the blue button touching the attenuator dials to
5. 5 3 Monitoring All signals presented to the patient can be monitored by the examiner via a monitoring headset or the internal speakers For this purpose press the Monitor button 6 and the monitor screen will appear Enable monitoring by pressing the functional button Monitor On Off 9 Monitoring by the integrated speaker is switched on by pressing the button 13 and the external headset is activated for monitoring via button 11 Then the monitor level of the left and right channel can be adjusted with the corresponding level control dial 1 In order to hear the signal given to the patient make sure to activate monitoring 9 Figure 11 Display Monitor Settings The talk back microphone is activated by the button 15 and its level adjusted by the frequency up and down buttons 4 5 5 4 Talk Forward Connect the gooseneck microphone or the microphone headset to the microphone socket 8 on the rear side of the device To talk to the patient press and hold the STIM mode TALK button and speak into the microphone Adjust the level by turning the left or right level control 1 while the STIM mode TALK button is pressed and held 8100456_Ol_MA41_EN_15a 25 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 5 5 Documentation of the Results All stored results can be directly printed via the USB printer Make sure that a compatible printer is connected via the USB port 4 and the device is configured
6. be included in the PDF or printout Press the button New 7 in the patient list to start a new session 8100456_Ol_MA41_EN_15a 31 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 7 User Menu The User Menu enables the user to customize the device to meet their specific needs Additionally the menu allows the user to printout the results via USB printer store the results as a PDF on an SD memory card or USB flash drive and the ability to enter the patient list To enter the User Menu press the Menu button 17 on the right side of the display User Menu ma amp Frequency Settings E Level Signal Pure Tone Average CD Channel Store Properties Default Transducer E Monitoring Tests Printer Settings PDF Save Option Device Information Date Time Display Brightness H Language Diagram Settings Import Export User Settings Settings Figure 14 User Menu Screen To choose an item from the menu use the level control dials A short description of the selected setting item will be displayed below the user menu list To display the sub items or change the setting of the selected item press the STIM Presenter button 2 To confirm the change press the OK button 7 on the left side of the display or press Cancel 6 to return without any change These menu items are available Frequency Frequency Default Frequency Set Settings On Off Set default frequency if side
7. disinfected between patients This includes physically wiping down the equipment which comes in contact with the patient using a recognized disinfectant Individual manufacturer s instruction should be followed for use of this disinfecting agent to provide an appropriate level of cleanliness If ear cushions are contaminated it is strongly recommended that you remove them from the transducer before they are cleaned To avoid person to person cross contamination of communicable diseases ear tips should only be used one time for insert earphones 9 Activation of Optional Features Optional features like the MHA or Patient Management can be activated by a license key Contact your local MAICO dealer and provide the serial number of your audiometer to obtain the required license key After receiving the key store it as text file with the name Key txt on your SD memory card then insert the card to the SD card slot of your MA 41 and switch it on The feature will be activated automatically and the functionality will be available 10 Device Update Insert the SD memory card into your computer and copy the update file Maico MA 4x series CAB to the SD memory card Switch off the MA 41 insert the SD memory card into the MA 41 and then switch the device on The update will be installed automatically Wait until the update is finished and follow the instructions Remove the SD memory card from the MA 41 it will boot up normally Following the upda
8. microphone 8006479 SD memory card 2 GB 8010775 Optional Accessories Item Item Number HDA300 headphones 8103867 HOLMCO 8103 headphones 8010878 TDH39 headphones 8010806 Ear 3A insert phones 8010959 Canton CD220 speaker single unit 8110906 Cable for Canton CD 220 8004229 SBC speakers 8111951 Monitor headset with microphone 8010870 Single ear monitor phone 8111857 USB cable 8011241 Carrying case 8100797 Sound room patch cords 8111839 Talk back microphone 8011233 NOAH audiometry module 8112043 MHA License 8110670 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 13 Warranty Maintenance and After Sales Service The MAICO MA 41 is guaranteed for 2 years This warranty is extended to the original purchaser of the instrument by MAICO through the distributor from whom it was purchased and covers defects in material and workmanship for a period of two years from date of delivery of the instrument to the original purchaser The MA 41 may be repaired and serviced only by your dealer or by an authorized service center We urgently advise you against attempting to rectify any faults by yourself or commissioning non experts to do so Do not modify this equipment without authorization of the manufacturer If this equipment is modified appropriate inspection and testing must be conducted to ensure continued safe use of the equipment WARNING No modification of this equipment is allowed In the event of repair duri
9. non calibrated audiometers can lead to incorrect results 3 3 Where to setup The MA 41 should be operated in a quiet room so that the audiometric examinations are not influenced by outside noises Ambient sound pressure levels in an audiometric test room shall not exceed the values specified in the norm ISO 8253 1 2010 or ANSI 3 1 1999 For use in noisier environments headphones with optional sound insulation muffs are available Electro medical instruments which emit strong electromagnetic fields e g microwaves or radiotherapy devices can influence the function of the audiometer Therefore it is not recommended to the use these instruments in close proximity to the audiometer as it may lead to incorrect test results The test room must be at a normal temperature usually from 15 C 59 F to 35 C 95 F and the instrument should be switched on approximately 10 minutes before the first measurement If the device has been cooled down e g during transport please wait until it has warmed to room temperature before using Caution External devices such as a computer printer or Ethernet which are connected to the device must meet electrical safety requirements such as IEC EN 60601 1 or UL 60601 1 This is to avoid electrical shock to the user or the patient 8100456_Ol_MA41_EN_15a 4 8100456 8 04 15 M N Operating Instructions MA 41 MAICO 3 4 Rear Panel Connections Figure 1 Rear View of the M
10. simulating noise Play back the reference signal with the CD Use the left or right level control 1 and adjust the levels until the VU meter 19 shows all yellow lights and one green light If one or more red lights are on reduce the level using the level control dial 1 To calibrate the microphone for live voice testing select MIC with the signal selector key 11 Press the Monitor button 6 and then InCal 17 and the calibration screen appears Use the left or right level control 1 and adjust the levels until the VU meter 19 shows all yellow lights and one green light Store the calibration and leave the calibration mode by pressing the OK button on the left side of the display 8100456_Ol_MA41_EN_15a 20 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 5 2 2 Performing Speech Testing Use the functional button for Speech on the right side of the tone screen 16 to switch to speech testing The speech test screen will open and the unit will default to the right ear and the level will be set to the default value The speech recognition threshold SRT is a test indicating the lowest level in which speech is understood using a closed set of spondaic words Speech testing can be done via recorded speech test material from CD or wave files or with the microphone and live voice using standardized word lists Ask the patient to repeat each word Often times a carrier phrase such as Say the word __ ma
11. transducer or signal type has changed Frequency Roll Back Frequency control jumps to 1 000 Hz if the 8100456_Ol_MA41_EN_15a 32 8100456 8 04 15 Operating Instructions MA 41 MAICO highest and lowest frequency was reached Stop Frequency control function stops at highest and lowest frequency Wrap Jumps to the lowest highest frequency when the highest lowest frequency Standard Select deselect Frequencies Level Default Level On Off Set default level after changing signal type Level Steps 5 2 1 Inverse Dialing Change effect on dialing an encoder Speech Level Unit dBSPL dBHL Select the level unit for speech signals 8100456_Ol_MA41_EN_15a 33 8100456 8 04 15 Signal PTA CD Channel 8100456_Ol_MA41_EN_15a Operating Instructions MA 41 Controller Assignment Presenter Duration Interrupter Presenter Mode Pulse Select the CD Channel 34 MAICO Assign ear side fixed to the left or right controller Same left dial controls level of the left ear right dial the level of the right ear Interchanged left and right dial controls the level of the opposite ear Assign signals fixed to the left and right controller Test signal always on the left hand side or always on the right hand side This setting requires a restart Unlimited signal is presented as long as the STIM bar is pressed 1 5 Seconds signal is switched off after 1 5 s
12. used as the masking signal and for speech audiometry speech noise is used 6 2 Tone and Speech Audiometry 6 2 1 How to Select Tone or Speech Audiometry Mode There are two audiometry modes Tone audiometry shows level and frequency on the display Speech audiometry shows level correct and incorrect words and speech discrimination percentage on the display Use the MODE button 16 to switch between tone and speech mode 8100456_Ol_MA41_EN_15a 29 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 6 2 2 Tone Audiometry Frequency Selection Use one of the two sets of frequency keys 4 or 5 to select the frequency The maximum and minimum frequency depends on the transducer you have selected Warble Tone Press the Test Signal button 12 to activate the warble tone The LED will highlight Warble Pulse Tone Press the Test Signal button 12 to activate the pulse tone The LED will highlight Pulse Tracking Function Press the TRACK key 14 to activate tracking Both channels will adjust when only one attenuator is adjusted Lock Function Press the LOCK UNLOCK 14 key to activate the interlock function Signals from both channels will be presented simultaneously with the press of only one STIM button 2 If both ears are selected LOCK is automatically activated Select L amp T 14 to interlock the stimulus presentation of both channels as well as the tracking of the levels STIM Mode S
13. 000 23 0 9000 27 5 10000 18 0 11200 22 0 12500 27 0 14000 33 5 38 5 16000 45 5 50 5 18000 83 0 88 0 35 20 20000 105 0 110 0 10 0 Calibration values for 18 kHz and 20 kHz are not covered by the norm ISO389 5 and defined by MAICO Diagnostic GmbH IEC60645 2 IEC Max Level ANSI S3 6 RETSPL ANSI Max Level RETSPL dBHL dBHL 20 0 95 18 0 100 20 0 90 18 0 95 0 0 115 0 0 115 8100456_Ol_MA41_EN_15a 53 8100456 8 04 15 M A Operating Instructions MA 41 AIC Insert phone Eartone 3A Reference equivalent threshold sound pressure level Frequency Hz Tone IEC NBN IEC 60318 Tone NBN sound damping 60318 5 5 Max Level dB Max Level dBHL RETSPL dB re RETSPL dB re 20uPa 20uPa joo 750 IEC60645 2 ANSI Max Level RETSPL dBHL Bone conductor Radioear B71W Force 4 9 5 9 N ANSI and IEC Mastoid placement Frequency Hz Reference equivalent threshold Air radiation Max level force level for tone ISO 389 3 ANSI S3 6 mean max Tone dB re 10N dB re 10N dB dBHL 67 45 58 ss e y y jo 48 5 laa5 oo d y doo 425 a25 o d doo 36 5 ass oo o d y y doo 31 sio 7 30 80 35 5 sss 80 40 50 40 o 0 8100456_Ol_MA41_EN_15a 54 8100456 8 04 15 M A Operating Instructions MA 41 IEC60645 2 IEC Max Level ANSI S3 6 RETSPL ANSI Max Level RETSPL dBHL dBHL 35 00 75 55 00 75 35 00 75 55 00 75 Sound field 0 degree incidence Reference equivalent threshold sound pressu
14. 110 110 100 IEC60645 2 IEC Max Level ANSI S3 6 RETSPL ANSI Max Level RETSPL dBHL dBHL 20 0 110 18 5 100 20 0 110 18 5 100 Frequency Tone RETSPL NBN RETSPL Max Tone Max NBN Hz dB re 20uPa dB re 20uPa dBHL dBHL 49 0 90 75 29 5 110 95 15 5 120 110 12 5 120 110 13 0 120 110 12 5 120 110 15 0 120 110 16 0 120 110 14 5 120 110 20 5 120 110 18 0 110 100 IEC60645 2 IEC Max Level dBu ANSI S3 6 RETSPL ANSI Max Level dBHL RETSPL 110 19 5 110 110 19 5 110 110 0 0 110 8100456_Ol_MA41_EN_15a 51 8100456 8 04 15 M A Operating Instructions MA 41 MAICO Headphone Holmco 8103 with Coupler IEC 60318 3 Force 4 5 N ANSI and IEC NBN RETSPL Max Tone dB re 20uPa dBHL Tone RETSPL dB re 20uPa Frequency Hz Signal IEC60645 2 IEC Max Level ANSI S3 6 RETSPL ANSI Max Level RETSPL dBHL dBspL dBHL dBspL Speech 20 0 110 24 5 110 110 24 5 110 110 0 00 110 8100456_Ol_MA41_EN_15a 52 8100456 8 04 15 M A Operating Instructions MA 41 AIC Headphone HDA 300 Ear simulator IEC60318 1 with adapter Force 8 8 N 0 5 N ANSI and IEC Frequency Tone RETSPL NBN RETSPL Max Tone Max NBN Hz dBspL dBspr dBHL dBHL 125 31 0 80 250 20 0 500 8 0 750 4 5 1000 2 0 1500 3 0 2000 0 0 3000 3 0 4000 0 5 6000 21 0 8
15. 8 04 15 M MAICO Insert earphones Ear 3A Sound field speaker Test Signal Masking Signals Speech Signals Modulation Pulse Tone Warble Tone Tests Tone Speech Patient Response Monitor Communication Data Connection 8100456_Ol_MA41_EN_15a Operating Instructions MA 41 10 dBHL 120 dBHL 10 dBHL 90 dBHL for CD 220 Pure tone Pulse tone Warble tone Narrow Band Noise 5 12 Octave filter with the same center frequency resolution as pure tone Speech Noise 125 to 6 000 Hz falling 12 dB octave above 1 kHz 5 dB External CD Player Microphone Wave file from SD memory card 0 25 0 5 s on time 5 sinus frequency modulation repetition rate 5 Hz HL UCL SRT WRS UCL Handheld response switch Build in monitor speaker headset Talk forward and talk back USB LAN Ethernet 43 8100456 8 04 15 M A Operating Instructions MA 41 MAICO External Devices Stimulus Functions Warm up Time Mode of Operation Environment Conditions Dimensions Weight Power Supply Power Consumption Device Fuses 8100456_Ol_MA41_EN_15a Supported printers HP PCL 3 and PCL 5e Epson ESC P2 LQ Stylus Color Canon iP100 iP90 BubbleJet USB keyboard Tone Presenter Interrupter Interlock tone presentation of both channels simultaneously Tracking fixed level difference between both channels Masking Less than 10 min
16. A 41 Power switch Power socket 100 240VAC 50 60Hz Network socket USB out socket USB in socket Patient response switch socket Talk back microphone socket Mic live voice microphone socket O Oo N Oo UV AI UU N Monitor phone output socket 10 11 12 13 14 15 16 17 CD Input Speaker left channel Speaker right channel Bone conduction receiver Insert phone left channel Insert phone right channel Phone left channel Phone right channel Place the MA 41 on a stable counter or table Plug the power cord into the power socket on the rear panel Connect all accessories with the appropriate sockets as shown above Plug the power cord into a grounded outlet Turn on the instrument with the power switch which is located on the rear panel of the MA 41 The device will perform its initialization and boot up Please wait until the test screen appears this can take up to 60 seconds If an error is 8100456_Ol_MA41_EN_15a 5 8100456 8 04 15 M A Operating Instructions MA 41 MAICO detected the startup is stopped and a description of the error will be shown on the display In this case please contact your local dealer for service 8100456_Ol_MA41_EN_15a 6 8100456 8 04 15 M N Operating Instructions MA 41 MAICO 4 Working with the MA 41 The hearing level can be easily adjusted with the level dials on each side of the instrument 1 The instrument s def
17. B MAICO Diagnostic GmbH Operating Instructions MA 41 MAICO Diagnostic GmbH e Salzufer 13 14 e D 10587 Berlin e Tel 49 30 707146 50 e Fax 99 PAGE INTENTIONALLY LEFT BLANK M A Operating Instructions MA 41 MAICO Table of Contents Page L INEFOGUEtION siii iii 1 2 PSN O einen 2 3 Getting Stadi 3 3 1 Unpacking the IS TIEN cos ntecdaciasiteanesnatctaaslasdeynanaseeadanssanansnencieies vets 3 3 2 Calibration Of the DEVI 4 3 3 Where to Set RR EA 4 3 4 Rear Panel CONnMe CONS sic ssecescscvecesesnacceassaecasnasecseededddisheaddatsadacesceite 5 4 Working with the MA 41 s s susnsnsnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 7 4 1 Using the Control Panel of the MA 41 7 4 2 Functionality of Operating Elements 9 4 3 The Display of the MA 41 sicsessxsscnctscxcsenccess ie 12 5 Measurement Methods of AUdiOMEtIY ccceeeeeeseseeeeeeeeeeeeeeenenees 13 5 1 Tone Audiometry preti relati 13 5 1 1 Pure Tone Tesini aaa 14 5 1 2 Bone Conduction Tetide 17 5 1 3 Sound Field Testing Optional 18 5 1 4 Uncomfortable Loudness UCL Testing 18 MEG Re AE 19 5 2 SOC VION NS TR ilaele 20 DeLana 20 5 2 2 Performing Speech TESTING luana 21 5 2 3 Speech Audiometry with Microphone or CD player 22 5 2 4 Speech Audiometry with Wave FIIES 23 Ci 24 5 2 6 Master Hearing Aid MHA
18. CO 4 2 Functionality of Operating Elements The following table describes the main functions of each button for the tone and speech audiometry screens Figure 3 Control Panel MA 41 7 Level control adjusts the hearing level for the left right ear STIM bar presents or interrupts the signal for the left right ear STORE button stores results for the left right ear Frequency up change to higher frequency for tone audiometry enters a correct answer for word recognition score WRS testing or selects the next word in the word list for speech recognition threshold SRT testing with wave files Frequency down change to lower frequency for tone audiometry enters an incorrect answer for WRS testing or selects a previous word in the word list for SRT testing with wave files Monitor with options to adjust monitor and talk back settings for speech the input calibration for microphone or CD player can be adjusted Function selector button function is displayed on the screen 8100456_Ol_MA41_EN_15a 9 8100456 8 04 15 M A Operating Instructions MA 41 MAICO Tone Select New to delete all stored results and start a new session Speech Reset the result percentage counter or Play wave file Channel STIM Mode button TALK to change from presenter to interrupter mode or to talk to the patient by pressing and holding the button down Functional selector button to select left right or both ears Transducer
19. IT RE 49 Appendix A Checklist for subjective audiometer testing 50 Appendix B Calibration values and maximum levels 51 8100456_Ol_MA41_EN_15a ii 8100456 8 04 15 Operating Instructions MA 41 MAICO 8100456_Ol_MA41_EN_15a ill 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 1 Introduction Thank you for purchasing a quality product from MAICO Diagnostic The Audiometer MA 41 is manufactured to meet all quality and safety requirements and has been certified with the CE symbol according to Medical Directive 93 42 EEC In designing the MA 41 we placed particular importance on making it a user friendly device meaning its operation is simple and easy to understand All functions of the MA 41 are software controlled allowing for easy upgrades of new features and functions in the future The user manual should make it as easy as possible for you to become familiar with the functions of the MA 41 If you have questions or ideas for further improvements please contact us Your MAICO Team 8100456_Ol_MA41_EN_15a 1 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 2 Intended Use The MA 41 is a portable one and half channel audiometer with pure tone speech and optional sound field audiometric testing Additionally it has limited special audiology test capabilities such as Stenger and Master Hearing Aid It can be used as a
20. a Bey Figure 9 Speech Audiometry with Wave Files The level is displayed as a numerical value at the top of the screen The level can be changed with the level controls 1 on both sides of the instrument Before starting the playback of the wave files the first word can be selected by the Frequency Up and Down buttons 4 and 5 Press the functional button Play 7 to start or pause the wave file playback The procedure for the SRT WRS and UCL test is the same as the procedure for CD or microphone testing For the SRT test a word needs to be selected in the wordlist by the frequency up 4 or down 5 key When the Play button 7 is pressed the selected word is presented For the WRS test score tally the correct words by pressing the frequency up 4 key and the incorrect words by pressing the frequency down 5 key The next word will be played back automatically Press the functional button Pause 7 to interrupt the playback The percentage of the speech discrimination score will be displayed and stored in the speech table or audiogram as soon as the Store button 3 is pressed Press the functional button List 6 to load another word list 8100456_Ol_MA41_EN_15a 23 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 5 2 5 Masking Speech audiometry masking can be used in the same manner as described in chapter 5 1 1 1 for pure tone audiometry Instead of narrowband noise speech noise SN is applied wh
21. according to the connected printer settings refer to menu settings in chapter 7 2 The results can also be stored as a PDF file on a SD memory card or USB flash drive to be later transferred to a PC for further usage The PDF file contains the measurement results An SD memory card needs to be inserted in the SD card slot 20 or a USB flash drive connected to the USB socket 4 on the rear side of the device When the examination has been completed press the Menu button 17 in the tone or speech test mode The user menu is opened and the functionality of the functional buttons 11 13 and 15 changes to PDF Print and Patients respectively To printout the results press the Print button 13 Make sure that a compatible printer is connected and the printer settings are correct To store the results on the SD memory card or USB flash drive press the PDF button 11 A PDF will be created and stored on for further transfer to a PC or printout via a PC connected printer Make sure that a SD memory card is inserted in the SD memory card slot 18 After printing or creating a PDF you will automatically return to the tone or speech test mode Enter the patient list by pressing the Patient button 15 to store the results 8100456_Ol_MA41_EN_15a 26 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 5 6 Patient Management The patient management option allows the results of the audiological tests to be stored on t
22. after power on Continuous 15 35 C 59 95 F operation 5 5007 41 122 F transport Humidity 30 90 W x D x H 34 5 x 20 x 8 cm 13 4 x LO x 3 2 1 5 kg 2 7 Ibs 100 240 V 50 60 Hz 10 Approximately 60 VA 2 x 1A slow blow 44 8100456 8 04 15 M N Operating Instructions MA 41 2 245 6709 10 12 14 16 Figure 19 Connection Sockets of the MA 41 Connection sockets Specification 1 Power switch on off 2 Power 100 240 V 50 60 Hz 3 Network Ethernet 4 USB out USB 2 0 5 USB in USB 2 0 6 Patient response switch Rl 500 7 Talk Back microphone Zi 1k Ul 0 38 500 mVeff 8 Microphone Zl 1k Ul 0 38 500 mVeff 9 Monitor phone ZA 250 UA 8 Veff 10 CD Input Zl 47 k Ul 0 04 5 Veff 11 Speaker left ZA 4 UA 8 Veff 12 Speaker right ZA 4 UA 8 Veff 13 Bone bone conductor ZA 4 UA 8 Veff 14 Insert phone left ZA 10 UA 1 Veff 15 Insert phone right ZA 10 UA 1 Veff Phone left headphone ZA 10 UA 1 Veff Phone right headphone ZA 10 UA 1 Veff _ N a 8100456_Ol_MA41_EN_15a 45 8100456 8 04 15 MN A Operating Instructions MA 41 MAICO Standard Accessories 8100456_Ol_MA41_EN_15a 46 Items Item Number MA 41 audiometer includes 8013739 DD45 headphones 88010380 B71W bone conductor 8102514 Patient response switch 8011091 Power cable 8011237 Gooseneck
23. ange the display brightness from 1 100 store new value by pressing the Store button 3 English German Italian French Spanish etc Diagram or Table 8100456 8 04 15 Operating Instructions MA 41 MAICO Number of Diagrams No audiogram only the in Tone Test level and frequency one combined audiogram or two separate audiograms for left and right Bone Lines On Off displays a dotted line connecting the bone conduction results Bone Symbol Setting Int Symbols US Symbols UK Symbols Import Export Export User Settings to SD User Settings Card Import User Settings from SD Card 8100456_Ol_MA41_EN_15a 36 8100456 8 04 15 IVA N Operating Instructions MA 41 MAICO 7 1 Set up Date and Time Select Date Time in the user menu by scrolling down with the left or right level control 1 and select Set Date Time by using the stimulus presenter bar The following screen will appear 1 02 2012 12 00 Figure 15 Date and Time Settings Set the date format to International or US by the functional button 9 Jump to the required position of the date or the time by the left Frequency Up Down button 4 or 5 and change the value by the right Frequency Up Down button 4 or 5 or left level control Press the functional button OK 6 to store the changes or Exit 7 to leave the Date Time setting screen without saving the changes 8100456_Ol_MA41_EN_15a 37 8100456 8 04 15 M Operati
24. anial bone behind but not touching the pinna The other side of the headband is placed in front of the opposite ear Set the receiver selector to Bone and select the testing ear 8100456_Ol_MA41_EN_15a 17 8100456 8 04 15 M A Operating Instructions MA 41 MAICO Perform the test utilizing the same method as air conduction testing If you are using bone conductor with contra lateral masking like the BKH 10 connect the contra phone to the left insert phone socket 14 Fig 1 If masking is switched on the masking noise will be routed to this output For hygienic reasons it is important to disinfect the bone conduction oscillator following each patient see chapter 8 5 1 3 Sound Field Testing optional Set the transducer selector 10 to Speaker Perform the test utilizing the same method as air conduction testing Warble tones should be used in the sound field as pure tones may provide inaccurate results in the typical test room Perform the test in the same way as described in the air conduction section above 5 1 4 Uncomfortable Loudness UCL Testing Testing of UCL can be measured using pure tone or speech stimuli The purpose is to determine the dBH level at which the stimuli becomes uncomfortable to the patient The UCL is described as the level between very loud and too loud as perceived by the patient when listening to the test signal This information is valuable for determining the limits of a patient s dy
25. ault setting is in 5 dB steps and can be adjusted to 2 dB or 1 dB steps as needed Figure 2 Control Buttons The Stimulus Presenter buttons 2 and Store buttons 3 are located beside the left and right level control dials 1 With the STIM mode button 8 you can change from presenter to interrupter mode The corresponding LED lights up when a signal is presented The frequency can be adjusted with the Plus 4 and Minus 5 buttons on both sides of the instrument The ergonomic design of the MA 41 makes it easy to control the dB level signal presentation and frequency adjustments with one hand 4 1 Using the Control Panel of the MA 41 The main functions of the MA 41 are directly accessible by using the Functional buttons which are located around the display As the buttons have changing functionality the actual function of each button is shown in the blue boxes on the screen above the button To change the function of buttons 9 11 13 and 15 which have several functions press the corresponding button and a list of alternative functions will appear Quickly press and release the button until the desired function is selected 8100456_Ol_MA41_EN_15a 7 8100456 8 04 15 M MAICO Operating Instructions MA 41 An extensive user menu for the customization of the MA 41 is available for advanced users see chapter 7 8100456_Ol_MA41_EN_15a 8 8100456 8 04 15 M N Operating Instructions MA 41 MAI
26. ctions MA 41 17 Functional selector button Menu to enter the user menu where settings can be adjusted results can be printed out or stored as PDF on SD memory card or USB flash drive or the patient list can be entered 18 SD memory card slot 19 Level meter 8100456_Ol_MA41_EN_15a 11 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 4 3 The Display of the MA 41 The instrument is set up by default to display the tone audiometry screen 30 dBHL Tone 1000 Hz Off dBHL Phone Steady Phone 10 10 20 20 30 30 40 40 60 60 70 70 80 80 90 90 0 5 1 2 4 8 0 125 0 5 1 2 4 8 Figure 4 Start Screen Tone Audiometry Example 0 125 The default frequency is set to 1 kHz and the level of the tone is set to 30 dBHL in the right ear masking in the other ear is switched off All channel information is shown on the display as well as the type of the function selector buttons shown on the display The display has an energy saving function the backlight of the display is automatically dimed after approximately three minutes Any action with the MA 41 such as pressing a button or rotating the dial will immediately illuminate the backlight 8100456_Ol_MA41_EN_15a 12 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 5 Measurement Methods of Audiometry Remove any obstructions which will interfere with the earphone cushion placement over the ear e g hats eyeglasses Always use th
27. e headphones with appropriate padded ear cushions Ensure the headphones are placed correctly over the patient s ears and that the red is over the right ear and the blue is over the left ear Adjust the headband of the headphones so that the receivers are at the correct height the sound output grid on the inside of the headphone should be directly over the ear canal Ask the patient to press the button on the patient response switch when the tone is heard even if it is barely audible For hygienic reasons it is important to disinfect the ear cushions on the headphone between patients see chapter 8 5 1 Tone Audiometry The MA 41 supports tone audiometric testing methods The following testing methods can be started in the tone audiometry mode and the results can be saved to the instrument Air conduction testing Bone conduction testing Sound field testing Pure tone hearing threshold Uncomfortable Loudness UCL Aided sound field thresholds Aided 8100456_Ol_MA41_EN_15a 13 8100456 8 04 15 M N Operating Instructions MA 41 MAICO 5 1 1 Pure Tone Testing During pure tone audiometry the patient s hearing threshold is measured Typically the threshold search begins with air conduction testing in the ear with better hearing While viewing the tone screen the following settings will be displayed 30 dBHL Tone 1000 Hz Off dBHL Phone Steady Phone 10 10 20 20 30 30 40 40 60 60 70 70 80 80 90 90
28. e the wizard installs the software 8100456_Ol_MA41_EN_15a MAICO MA4x family D WedfColnstaller01 005 dll To C WINDOWS system32 Figure 18 Software Installation 40 8100456 8 04 15 M A Operating Instructions MA 41 MAICO Once the instrument is linked to the PC audiometry software you are able to record the results while performing your audiological assessment Make sure that the software is running and that a connection is built up before starting a new session 8100456_Ol_MA41_EN_15a 41 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 12 Technical Data C The MA 41 audiometer is an active diagnostic medical product 0123 according to the class Ila of the EU medical directive 93 42 EEC Standards Test Frequencies Level Step Maximum Sound Pressure Level AC with earphone DD45 BC with B71W Bone Conductor 8100456_Ol_MA41_EN_15a IEC60645 1 EN 60645 1 Type 2 IEC60645 2 Type B ANSI S3 6 1996 ANSI S3 6 2010 Type 3 B ISO 389 UL 60601 1 American Standards for Medical Electrical Equipment IEC EN 60601 1 class protection class B International Standards for Medical Electrical Equipment CAN CSA C22 2 NO 60601 1 08 Medical Device Directive MDD to comply with EC Directive 93 42 EEC 125 Hz 8 000 Hz 5 dB 2 dB or 1 GB level steps user selectable 10 dBHL to 120 dBHL 10 dBHL to 80 dBHL 42 8100456
29. econds User defined duration user can define a maximum presentation duration Default Presenter or Interrupter Mode 500 ms slow pulsing 250 ms fast pulsing Select deselect frequencies for the calculation of the PTA value for the default transducer Both Channel A Channel B 8100456 8 04 15 M MAICO Store Properties Default Transducer Monitoring Tests Printer Settings PDF Save Option Device Information Date Time Display Brightness Language Diagram Settings 8100456_Ol_MA41_EN_15a Operating Instructions MA 41 Change Frequency After Store Change Level After Store Selection of Default Transducer Monitoring Start Test Set Printer Settings Save on SD Card Save on USB Show Information Set Date Time Diagram in Speech Test 35 Moves to next test frequency after storing a threshold on or stays on same frequency after storing off Change in level after storing a threshold stay at the same test level 0 or decrease by 10 20 or 30 dB Headphones or Inserts Monitor only speech signals off or all signals on Tone Speech defines test which will load after start Up Opens a dialog to select a printer and configure its settings Stores PDF files to an SD memory card Stores PDF files to a USB flash drive Shows device information Opens a dialog to change the date time and the date format to US or International Ch
30. een appears to enter the patients last name first name ID and date of birth 8100456_Ol_MA41_EN_15a 27 8100456 8 04 15 Operating Instructions MA 41 MAICO New Patient 23 07 2012 Figure 13 New Patient Enter the characters of the name by scrolling through the alphabet with the level controls and enter the selected character by using the Stimulus button 2 Jump to the next or previous field by using the Frequency Up 4 or Down 5 button The date can be entered in the same manner with the level controls Delete the last character or number by pressing the Delete button 17 A USB keyboard can also be utilized to enter the patient information Connect it to the USB connector 4 and type in the characters Jump to the next field with the tab key Press the functional button OK 6 to save the new patient and go back to the patient list The new patient is selected and the current measurement results can be saved to this new patient by pressing the functional button Save 9 Press the button No Name 9 to store the results only by a patient number without entering a name or use Cancel 6 to go back to the Patient List without saving There is a possibility available to lock the database and to enter a log in PIN if the language is set to English Enter the Patient List and select New Patient by pressing the New Patient button 15 Select Log In On by pressing the functional button Log In On Off 15 A
31. election Press STIM MODE 8 key to switch between continuous presentation and presentation by pressing the STIM button 2 When in continuous presentation mode the STIM buttons function as interrupters The light above the STIM MODE key is on if continuous presentation is selected CD and Wave speech signals are always in continuous presentation Talk Forward Microphone Press and hold the STIM MODE 8 to activate Talk Forward Adjust the level by turning one of the attenuator dials 1 while in the mode Talkback Microphone and Monitor Volume Control Press the Monitor key on the left side of the display and the volume control bars for talkback and monitor are shown Adjust the monitor volume with the right and left dials 1 Adjust the talkback microphone volume with the plus minus keys 4 or 5 8100456_Ol_MA41_EN_15a 30 8100456 8 04 15 M A Operating Instructions MA 41 MAICO To store the actual settings press OK 19 6 2 3 Speech Audiometry To select speech audiometry select Speech 16 and the test SRT or WRS 13 Use the frequency up 4 and down 5 key to select a word in the word list For the WRS test the display shows the percentage of correctly repeated words To count the word as correct press the frequency key 4 up To count the word as incorrect press the frequency key 5 down To clear the counter press the Reset key 7 on the left side of the display Speech Calibration To calibrate t
32. en masking is turned on Masking noise is activated in the non test ear by pressing the functional button Masking On Off 15 Adjust the level of the masking channel by the corresponding level control 1 for effective masking 5 2 6 Master Hearing Aid MHA After you have completed the speech audiometry testing you may wish to demonstrate to the patient the difference a hearing aid can make Use the MA 41 master hearing aid to adjust various frequency slopes for speech The Master Hearing Aid MHA feature utilizes input signals from the Live Voice Mic external CD MP3 player or with Wave files These signals are then filtered to simulate the benefit of hearing aids in the case of a high frequency hearing loss The level of the low frequencies can be reduced by 6 dB 12 dB 18 dB per octave Begin by selecting a signal source in the speech mode with the functional selector button 11 Start the MHA function by pressing the Test Selection button 13 Change the dB presentation levels with the level control dials 1 The influence of the filters can be changed by using the Frequency Up 4 and Down 5 keys The MHA function can be performed using monaural or binaural presentations 60 dBsPL cD MHA Off dBSPL Phone Phone 18 dB octave 18 dB octave SRT Mask Signal WRSMask Condition Figure 10 Display Master Hearing Aid 8100456_Ol_MA41_EN_15a 24 8100456 8 04 15 M N Operating Instructions MA 41 MAICO
33. ernational standard IEC 601 1 EN 60601 1 The instruments are not intended for operation in areas with an explosion hazard Electrostatic discharge ESD according to IEC 61000 4 2 Use the device only in an electrostatic controlled environment To avoid the risk of electric shock this equipment must only be connected to supply mains with protective earth 8100456_Ol_MA41_EN_15a 48 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 14 2 Measuring Security To guarantee that the audiometer works properly the instrument has to be checked and calibrated at least once a year The service and calibration must be performed by an authorized service center In accordance with the regulations of the EU Medical Directive warranties may be void if these checks are not done The use of non calibrated audiometers can lead to incorrect test results and is not advisable 14 3 Device Control The user of the instrument should perform a subjective instrument check once a week 14 4 Operation The instrument should only be handled and operated by trained personnel audiologists ENT doctors or personnel with similar qualifications 8100456_Ol_MA41_EN_15a 49 8100456 8 04 15 M A Operating Instructions MA 41 MAICO Appendix A Checklist for subjective audiometer testing Clean the ear and head cushion Instrument Untangle all lines when necessary Are the headphone cushions in good cond
34. f scissors or other sharp tools SAVE ALL THE ORIGINAL PACKING MATERIAL AND THE SHIPPING CONTAINER SO THE INSTRUMENT CAN BE PROPERLY PACKED IF IT NEEDS TO BE RETURNED FOR SERVICE OR CALIBRATION Notify the carrier immediately if any mechanical damage is noted This will insure that a proper claim is made Save all packing material so the claim adjuster can inspect it as well Notify your dealer or MAICO when the adjuster has completed the inspection Please check that all accessories listed below have been received in good condition If any accessories are missing or damaged immediately notify your dealer or MAICO Standard accessories Headphones DD45 Bone conduction receiver B71W with headband Gooseneck microphone SD memory card inserted into the SD card slot Patient response switch Power cable Operating Instructions 8100456_Ol_MA41_EN_15a 3 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 3 2 Calibration of the Device The instrument headphones bone conduction oscillator as well as the optional insert phones and speakers will come calibrated to the instrument and have the same serial number e g 0021520 Use of transducers not calibrated to this particular instrument will likely lead to incorrect thresholds causing incorrect test results which will invalidate the test If a transducer needs to be replaced the instrument must be recalibrated with the new transducer The use of
35. he MIC or CD speech input select the input with the SIGNAL selector key 11 Press the Monitor button 6 so that the monitor setting screen appears Now press the InCal button 17 on the right side of the display and the calibration screen appears Play the reference signal with the CD player or speak into the microphone Use the left or right intensity dial 1 and adjust the levels until both VU meters show all yellow and one green light If one or more red lights are displayed reduce the level using the corresponding dial 1 Store the calibration and leave the calibration mode by pressing the OK 6 button on the left side of the display 6 2 4 Documentation of the Results Printout Enter the user Menu by pressing the functional button 17 and press the Print 13 button to printout the results Store Results as a PDF Enter the user Menu by pressing the functional button 17 and press the button PDF 13 to save the results as PDF file on SD memory card or USB flash drive Store the Result in the Patient List Enter the User Menu by pressing the functional button 17 and press the button Patient 15 to enter the patient list Enter a new patient by pressing the button New Patient 15 It is also possible to print a result from the patient list or to create a PDF of the result Select a stored session of a patient in the patient list and press then the button PDF 11 or Print 13 In this case the patient information will
36. he SD memory card The results can be reloaded at a later time to be reviewed edited or printed Patients can be stored by a number ID or by entering the name and birth date The demographic patient information can be entered using the level controls 1 or a connected USB keyboard Enter the User Menu by pressing the Menu button 17 in the tone or speech audiometry screen Press the button Patients 15 to display the patient list Patient List Patient 005 Patient 004 Patient 003 Patient 002 Patient 001 Figure 12 Patient List Select a patient using the level controls and press the Stimulus button 2 to display the stored sessions Select a session and press the PDF button 11 to save the PDF on the SD memory card or USB flash drive To print the results to a connected printer press Print 13 The patient information will only be included on the printout if it is done in the patient list or if the PDF is created in the patient list screen Current results can be stored to a numbered patient or to a named patient Entering the Patient List automatically a new numbered patient with a new number will be selected Just press the Save button 9 to save the current session to the new patient number To save the results to an existing patient select a patient by the level controls and press the Save button To save the current results to a new patient with a new patient name press the button New Patient 15 and a scr
37. ition f If not gt replace Manufacturer Are plugs and leads in good condition undamaged Are all controls working properly Serial No Is the Patient Response Key working properly if available Check batteries and renew if necessary Examiner Test Signal Quality All the test frequencies in the below table indicate typical hearing level and can be changed when necessary Masking B for Buzz tone G for Noise V for signal distortion S for switching masking noise When noise B G V or S is blocked inform the service center When the test tone is heard at the masking ear contact the service center Arcod Conduction Audiogram 1 2 B 4 6 8 kHz Should is the last measurement of the patient For inverted measurement please reattach the headphone f the frequency difference between Should and Is for one ear averages more than 10 dB contact the SERVICE CENTER Bone Conduction Audiogram 8100456_Ol_MA41_EN_15a 50 8100456 8 04 15 M A Operating Instructions MA 41 MAICO Appendix B Calibration values and maximum levels Headphone DD45 with Coupler IEC 60318 3 Force 4 5 N ANSI and IEC NBN RETSPL j Max Tone Max NBN dB re 20uPa dBHL dBHL 90 75 Frequency Tone RETSPL Hz dB re 20uPa 110 95 120 110 120 110 120 110 120 110 120 110 120 110 120 110 120
38. namic range Warning Because this test uses high sound pressure levels it is extremely important to perform this test using the utmost caution to avoid causing hearing loss To prevent the possibility of extreme discomfort by the patient it is important to start the test at a comfortable level Press and release the test mode selector key 13 below the display to select UCL The LCD display in the bottom row changes from HL to UCL Start with a test level of 60 GBH and present the tone briefly max 1s If the signal was recognized by the patient as not uncomfortable increase the level and proceed as described before If the signal was uncomfortable for the patient store the value Proceed accordingly with other test frequencies 8100456_Ol_MA41_EN_15a 18 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 5 1 5 Stenger The Stenger test is a test to confirm the presence of pseudohypacusis During this test two tones of the same frequency will be presented simultaneously to both ears and only the louder tone will be perceived Select HL to perform the Stenger test and select both ears 9 Instruct the patient to press the response button when the tone is heard Present a tone to the better hearing ear 10 dB above threshold and wait for the patient to indicate the tone has been heard Now present the tone to the poorer ear 10 dB below the indicated threshold the patient may ignore this tone Present the
39. ng Instructions MA 41 MAICO 7 2 Set Printer Settings Select the printer by turning the left or right level control 1 down The color mode is automatically adjusted If the color mode is wrong adjust the color mode as well Jump to the field paper format by pressing the stimulus presenter bar several times and select A4 or Letter format by using the level controls If the printer is connected to your Ethernet network select Ethernet as port Additionally the IP address of the printer needs to be entered in the field IP Address Select the number of the IP address by rotating the level controls and press the STORE button to enter the selected number Save the settings and return to the user menu by pressing the functional button OK 7 Canon_IP 100 M lore Figure 16 Printer Settings Test your printer settings by a sample print before starting the audiological assessment Incorrect settings may require a restart of the device Enter the field clinic name by using the STIM button Select letters by rotating the level control and enter the selected letter by pressing the STORE button 3 Save the settings and return to the user menu by pressing the functional button OK 7 8100456_Ol_MA41_EN_15a 38 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 8 Disinfection It is recommended that parts which are in direct contact with the patient e g earphone cushions or patient response switch be
40. ng the guarantee period please enclose evidence of purchase with the instrument In order to ensure that your instrument works properly the MA 41 should be checked and calibrated at least once a year This check has to be carried out by your dealer When returning the instrument for repairs it is essential to send the headphones and bone conductor as well Send the device to your dealer or to a service center authorized by your dealer Please include a detailed description of faults In order to prevent damage in transit please use the original packing if possible when returning the instrument 8100456_Ol_MA41_EN_15a 47 8100456 8 04 15 M A Operating Instructions MA 41 Within the European Union it is illegal to dispose electric and electronic waste as unsorted municipal waste According to this all MAICO products sold after August 13 2005 are marked with a crossed out wheeled bin Within the limits of Article 9 of DIRECTIVE 2002 96 EC on waste electrical and a a O electronic equipment WEEE MAICO has changed their sales policy To avoid additional distribution costs we assign the responsibility for the proper collection and treatment according legal regulations to our customers Date of Manufacture 14 Safety Regulations READ THIS ENTIRE MANUAL BEFORE ATTEMPTING TO USE THIS SYSTEM 14 1 Electrical Safety The MA 41 audiometer is constructed to comply with protection id class of the int
41. ough for them to hear and understand Begin the test and decrease the level as the patient repeats the word Once the threshold has been found press the Store button 3 to save the result For the WRS test the level remains fixed and correct or incorrect answers can be entered by the Frequency Plus 4 and Frequency Minus 5 button Once the word list has been completed by the patient press the Store button to save the established WRS score To clear the word counter press the Reset key 6 on the left side of the display For the UCL testing the level is increased until the patient indicates the level is uncomfortable and the result can be saved by pressing the Store button 3 8100456_Ol_MA41_EN_15a 22 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 5 2 4 Speech Audiometry with Wave Files If Wave is selected by the speech signal selector 11 a menu will pop up with the available word lists stored on the SD memory card A word list can be selected by using the level controls to scroll through the list A list can be loaded by pressing the Stimulus button The word list will then be displayed on the speech audiometry screen 30 dBHL Wave 0 off dBHL Phone 0 0 Phone 1 Playground 2 Daybreak 3 Northwest 4 Mushroom 5 Doormat 6Eardrum 7 Iceberg 8 Padlock 9 Sunset 10 Duck pond 11 Cowboy 12 Inkwell 13 Baseball 14 Whitewash 15 Oatmeal 16 Greyhound SRT Mask Signal WRSMask Condition den EE c
42. portable audiometer or a desktop unit for ENT diagnostics hearing aid fittings in the office and for mobile audiometry The MA 41 is intended to be used by hearing healthcare professionals i e ENT doctors audiologists and or technicians and school nurses who have been trained by a hearing healthcare professional The MA 41 audiometer delivers 11 air conduction AC test frequencies from 125 Hz to 8 kHz with levels from 10 dBHL to 120 dBHL Bone conduction BC can be tested with 10 test frequencies from 250 Hz to 8 kHz with levels from 10 dBHL to 80 dBHL using the B71W bone conductor As an upgrade option the MA 41 is also capable of high frequency audiometry up to 20 kHz The large back lighted LCD color display shows level frequency transducer signal type audiograms and other information for each channel The MA 41 performs tests using DD45 headphones B71W bone conduction oscillator optional insert phones and optional speakers Built in test signals include pure tone pulse tone warble tone narrow band and speech noise Inputs include ports for a live soeech microphone and a CD player for speech test material Speech tests can also be imported via a removable SD memory card Outputs have separate jacks for air conduction headphones bone conduction transducer optional insert phones and optional sound field speakers Furthermore the patient management feature provides the ability to store results in the device for furthe
43. present or interrupt the tone The status LED for the stimulus mode button 8 will illuminate when the tone is presented Follow your preferred procedure for the hearing threshold evaluation Note A warning prompt appears on the display in the event that the hearing level exceeds 100 dBHL The warning prompt disappears after approximately 3 seconds As long as the prompt is visible on the display no further entries can be made Test the frequencies Starting at 1 000 Hz test the higher frequencies first then the lower frequencies Use the frequency up key 4 to select the next higher frequency and use the frequency down key 5 to select the next lower frequency Once a threshold value is established at the desired frequency press the store button 3 to store the threshold The appropriate symbol will be plotted in the audiogram on the display Once all frequencies are tested select the other ear and repeat the hearing threshold test Pulse Tone If required the test can also be performed with a pulsed tone Set the test signal button 12 on PULSE and the pure tone will be switched to a pulsating tone Warble Tone If required the test can also be performed with a warble frequency modulated tone Press the test signal button 12 and the pure tone will frequency modulate The warble tone can also be pulsed as described above 8100456_Ol_MA41_EN_15a 15 8100456 8 04 15 M A Operating Instructions MA 41 MAICO
44. r evaluation and documentation Results can also print directly via the USB printer or stored as a PDF file on the included SD memory card or USB flash drive The MA 41 can be connected to the PC via USB to track the session and store results in NOAH or the MAICO Database In order to remain current with present and future technologies the MA 41 is compatible with PCs easy to use extremely reliable and is adaptable to future developments It is also designed to be easily serviced as the need arises Automatic test programs make trouble shooting and the yearly calibration as effortless as possible The speaker outputs can also be used as line level outputs for an external amplifier or active speaker Please contact your authorized service center to change to line output levels 8100456_Ol_MA41_EN_15a 2 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 3 Getting Started 3 1 Unpacking the Instrument Prior to shipping the MA 41 was carefully packed and inspected However it is good practice to thoroughly inspect the outside of the shipping box for signs of damage If any damage is noted please notify the carrier immediately Please remove the MAICO instrument from the shipping box by lifting the cardboard package on the end flaps Holding the package securely fold the side flaps upwards to loosen the tension in the plastic film The instrument can now be easily removed from the plastic packaging without the use o
45. re level and maximum hearing levels For Canton CD 220 Maico SBC speaker ISO 389 7 and ANSI S3 6 1996 Max level NBN dBHL CD220 SBC Max level Tone dBHL CD220 SBC IEC60645 2 IEC Max Level ANSI Max Level RETSPL dBal dBspL dBHL dBspL CD220 SBC CD220 SBC 0 0 14 5 90 75 0 0 0 0 90 75 8100456_Ol_MA41_EN_15a 55 8100456 8 04 15 MAICO Operating Instructions MA 41 Specifications are subject to change without notice MAICO 8100456_Ol_MA41_EN_15a MAICO Diagnostic GmbH Salzufer 13 14 10587 Berlin Germany Phone 49 30 70 71 46 50 Telefax 49 30 70 71 46 99 E mail sales maico biz Internet www maico biz 56 8100456 8 04 15
46. screen will appear to set your personal four digit log in PIN Select four numbers between 0 and 9 by the level dial and enter each by pressing the STIM bar 2 and confirm your personal log in PIN by pressing the button Set 9 Remember the PIN very well otherwise it is not possible to enter the patient list anymore Each time you enter the patient list this PIN need to be entered by selecting the digit by the level dial and entering it by pressing the STIM bar 2 Enter the New Patient screen and select Log In Off by button 15 to switch off the patient list log in 8100456_Ol_MA41_EN_15a 28 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 6 Quick Reference Guide 6 1 General Setup 6 1 1 Startup settings Air conduction Pure tone on the right channel left channel is switched off 30 dBHL tone Presenter mode 6 1 2 Transducer Selection Select the transducer to be used headphones Phones or insert phones Insert by pressing the appropriate button 10 The display shows the selected transducer at the top of the display screen below the presentation levels 6 1 3 Signal Selection For tone testing the test signal is always tone For speech audiometry the signal can be selected by the SIGNAL key 11 The type of NOISE signal is dependent upon the opposite channel s signal 6 1 4 Masking Use the Masking On Off button 15 to activate masking in the non test ear For tone audiometry narrow band noise is
47. selector button to choose between Phones Insert Bone and Speaker only calibrated transducers are available Functional selector button function is displayed on the screen Tone No response stores value with arrow below the symbol Speech Select microphone external CD player or wave file as signal source Test Signal selector button Steady Pulse Warble or P amp W pulse and warble tone Function selector button function is displayed on the screen Tone Selects test for selected receiver either the pure tone threshold Hearing Level HL or Uncomfortable Loudness UCL if Speaker is selected as the transducer an option for aided sound field threshold Aided is also made available Speech Select Speech Recognition Threshold SRT Word Recognition Score WRS UCL or Master Hearing Aid MHA if Speaker is selected as the transducer Aided can be selected to record aided sound field test results Select Unlock Lock locks the presentation of the signal in both channels Track activates the masking noise to automatically increase and decrease level in relationship to the signal L amp T Lock and Track Functional selector button function is displayed on the screen Masking on off activates masking in the opposite ear Functional selector button to switch from tone to speech and back the current function is displayed on the screen 8100456_Ol_MA41_EN_15a 10 8100456 8 04 15 M MAICO Operating Instru
48. te please use your computer to delete the update file from the SD memory card in order to have normal use of the card 8100456_Ol_MA41_EN_15a 39 8100456 8 04 15 M MAICO 11 Connection to the PC Operating Instructions MA 41 Install the included software on your PC The driver for the device will be installed automatically Connect the MA 41 by USB cable to the PC and turn on the device The required driver will be installed Please follow the installation procedure When the installation program asks you how to search for software choose Yes this time only and click on the Next button Found New Hardware Wizard Welcome to the Found New Hardware Wizard Windows will search for current and updated software by looking on your computer on the hardware installation CD or on the Windows Update Web site with your permission Read our privacy policy Can Windows connect to Windows Update to search for software Yes this time only O Yes now and every time connect a device O No not this time Click Next to continue Next gt Cancel Figure 17 Installation Advice Select automatic installation in the next dialog window and click the Next button Wait till the MAICO MA 4x family driver is installed and the operating system updated Click on the Finish button when the installation of the driver is completed The new hardware is now ready to use Found New Hardware Wizard Please wait whil
49. tones simultaneously by pressing the lock functional button 14 and the STIM Mode button 8 to set it to interrupter mode If the patient responds it is a negative If the patient does not respond it is a positive Stenger indicating that the tone is heard in the poorer ear and the patient is ignoring the stimulus 8100456_Ol_MA41_EN_15a 19 8100456 8 04 15 M Operating Instructions MA 41 MAICO 5 2 Speech Audiometry The MA 41 supports speech audiometry To conduct speech tests using speech test material you can use a CD player wave files from the SD memory card or a microphone Caution If you are using a CD player powered by electrical current the player must meet electrical safety requirements such as IEC 601 1 or UL This is to avoid electrical shock of either the patient or you If you are not sure if your player meets these requirements it is safer to use battery power 5 2 1 Input Calibration The MA 41 must be calibrated to the particular soeech test to ensure valid test levels That means every time you change the speech test CD you must recalibrate the instrument To calibrate the CD speech input select CD with the signal selector key 11 Press the Monitor button 6 and then InCal 17 and the calibration screen appears see figure 7b Figure 7a Monitor settings Figure 7b Input Calibration On every CD with speech test material there is a reference signal such as a reference tone or speech
50. y be used The patient should sit at a distance of at least 1 meter from the device Additionally any obstructions which will interfere with the placement of the earphone cushions on the ear i e hair eyeglasses should be removed Ensure the headphones are put on correctly Adjust the headband of the headphones so that the receivers are at the correct height the sound output grid should be placed directly over the ear canal Select the ear to be tested by pressing Right Left or Both by the function selector button 9 on the control panel underneath the screen 30 dBHL MIC SRT Off dBHL Phone Phone Speech Test 70 60 E 50 40 30 10 0 10 2 30 40 50 60 70 80 90 100 110 120 HL Figure 8 Speech Test Screen Next select the transducer to be used Phones Insert or Speaker by pressing the Transducer button 10 Toggle to the required signal by the selector button 11 to MIC CD Wave 8100456_Ol_MA41_EN_15a 21 8100456 8 04 15 M A Operating Instructions MA 41 MAICO 5 2 3 Speech Audiometry with Microphone or CD player Connect the microphone or CD player to the corresponding input 10 Select the test ear 9 and MIC or CD as signal source by the functional button 11 Make sure that the input signal is calibrated correctly as described above Select the test SRT WRS or UCL with the functional button 13 For the SRT test familiarize the patient with a closed set of spondaic words at a level loud en
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