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Operating Instructions MA 42

Operating_Instructions_8100460-6_MA42_e_15a

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card slot (20) or a USB flash drive connected to the USB socket (4) on the rear
side of the device.

When the examination is completed, press the Menu button (19) 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.

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, press the PDF button (11). A PDF
will be created and stored on the SD memory card or USB flash drive for further
transfer to a PC or printout via a PC connected printer. Make sure that the
setting PDF Save Option is set to correct storage medium SD memory card or
USB flash drive (chapter 7).

After printing or creating a PDF you will automatically return to the tone or
speech test mode.

Enter the patient list by pressing the Patients button (15) to store the results.

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Содержание MA 42

Страница 1: ...Operating Instructions MA 42 ...

Страница 2: ......

Страница 3: ... 1 Pure tone Testing 13 5 1 2 High tone audiometry optional 16 5 1 2 Bone conduction testing 16 5 1 3 Sound Field Testing 17 5 1 4 Uncomfortable Loudness UCL Testing 18 5 1 5 Most Comfortable Loudness MCL 18 5 1 6 The SISI Test 18 5 1 7 The Threshold Decay Carhart Test 21 5 1 8 ABLB 22 5 1 9 MLB 22 5 1 10 Stenger 23 5 1 11 Langenbeck 24 5 2 Speech Audiometry 25 5 2 1 Input Calibration 25 5 2 2 Per...

Страница 4: ...35 6 2 2 Tone audiometry 36 6 2 3 Speech audiometry 37 6 2 4 Documentation of the results 37 7 User Menu 39 7 1 Set up Date and Time 44 7 2 Set Printer Settings 44 8 Disinfection 46 9 Activation of Optional Features 46 10 Device Update 46 11 Connection to the PC 47 12 Technical Data 48 13 Warranty Maintenance and After Sales Service 53 14 Safety Regulations 54 14 1 Electrical Safety 54 14 2 Measur...

Страница 5: ...ly device meaning its operation is simple and easy to understand All functions of the MA 42 are software controlled allowing easy upgrades of new features and function in the future That means that you have invested in a device that will correspond to your future needs The user manual should make it as easy as possible for you to become familiar with the functions of the MA 42 If you have problems...

Страница 6: ...ilt in test signals include pure tone pulse tone warble tone narrow band noise white noise and speech noise Inputs include ports for live speech and CD speech test material Speech tests can also be played from a removable SD memory card Outputs have separate jacks for air conduction earphones bone conduction optional insert phones and optional sound field speakers As additional feature the patient...

Страница 7: ... This will assure 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 are received in good condition If any accessories are missing or damaged immediately notify your dealer or MAICO Standard accessories Headphones DD45 Bone conduc...

Страница 8: ... the values specified in the norm ISO 8253 1 or ANSI S3 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 radiotherapy devices can influence the function of the audiometer Therefore the use of these instruments is not allowed in close proximity to the audiometer Th...

Страница 9: ...ice microphone socket 17 Phone right channel 9 Mon monitor phone output socket Place the MA 42 on a stable counter or table Plug the power cord into the power socket on the rear panel Connect all accessories with the adequate sockets as shown above Plug the power cord into a grounded outlet Turn on the instrument with the power switch which is located at the right side of the MA 42 The device perf...

Страница 10: ...signal is presented The frequency is changed with plus 4 and minus 5 buttons for both channels together The ergonomic design of the MA 42 makes it easy to control level signal presentation and frequency with one hand 4 1 Using the control panel of the MA 42 The main functions of the MA 42 are directly accessible by using the functional buttons which are located around the display As the buttons ha...

Страница 11: ... next higher frequency for tone audiometry or to enter a correct answer for speech audiometry 5 Frequency down change to next lower frequency or to enter a false answer for speech audiometry 6 Monitor with options to adjust monitor channel levels and talk back level At speech also the input calibration for microphone or CD player can be adjusted 7 Functional selector button function is displayed o...

Страница 12: ...lect Speech Recognition Threshold SRT Word Recognition Score WRS MCL UCL or MHA 14 Select Unlock Lock locks presentation of the signal in both channels together Track activates the masking noise to automatically increase and decrease level in relationship to the signal L T Lock and Track 15 Functional selector button function is displayed on the screen Signal selector to choose between tone narrow...

Страница 13: ...noise for the left All settings are shown on the display as well as the function of the control panel buttons on the left and right side of the display The level limits of the chosen transducer are marked by thin lines in the lower area of the audiogram The Display has an energy saver function the backlight of the display is automatically dimed after approximately three minutes Any action with the...

Страница 14: ...re at the correct height the sound output grid exactly facing the ear canal Explain to the patient that he should press the button of the patient response switch if he just hears the test tone For hygienic reasons it is important to clean the ear cushions of the headphone see chapter 9 after testing 5 1 Tone Audiometry The MA 42 supports the main tone audiometric testing methods The following test...

Страница 15: ... can be set for each channel independently to tone narrow band noise or white noise by the functional selector buttons 11 and 15 Select the ear to be tested by pressing the Right or Left key 9 17 on the control panel underneath the screen However it is easier to select Swap by one of the functional selector buttons 9 or 17 to switch from the left to the right ear Next select the transducer to be u...

Страница 16: ...t the next frequency increase the level again and proceed with presenting the test signal as described before Once a threshold value is established press the STORE 3 key in order to store the threshold The appropriate symbol will be plotted on the audiogram If the patient is not responding the current value can be marked as no response by holding the store button pressed for 3 seconds Once all fre...

Страница 17: ...fference in hearing loss between ears Important Please advise the patient to tell you in which ear test signal is heard It is thereby easier to detect crossover To ensure that the patient will not experience crossover you must mask the opposite ear Masking increases the hearing threshold of the opposite ear The masking is done with a noise signal which is transmitted by the headphone For pure tone...

Страница 18: ...ctional button 17 till High Tone is highlighted The high tone diagram is displayed combining the left and right ears results Additional frequencies from 8 kHz to 20 kHz can be selected now by the frequency up 4 or down 5 key The test procedure is identical to the description in chapter 5 1 1 Pure tone Testing If a transducer is selected which is not calibrated for high frequencies the diagram will...

Страница 19: ...on the masking noise will be always routed to this output For hygienic reasons it is important to clean the bone conductor see chapter 8 Disinfection 5 1 3 Sound Field Testing Set the receiver selector to Speaker Perform the test the same way as for air conduction Warble tones should be used in the sound field since pure tones may not provide reproducible results in the typical test room Perform t...

Страница 20: ... accordingly with other test frequencies 5 1 5 Most Comfortable Loudness MCL Testing of MCL can be measured using pure tone stimuli or speech The purpose is to determine the most comfortable listening level for the patient for a given stimulus The dB level at which the stimulus is the most comfortable is determined This level might be described as the level at which the patient would be comfortabl...

Страница 21: ...SE 9 button Press START 19 to resume the test The patient must be instructed You will now hear a continuous tone Every time it becomes louder immediately push the switch 5 1 6 2 Training of the Patient Only with careful training during the following conditioning phase a valid test result can be achieved The training starts with level steps of 5 dB That means a continuous tone e g 65 dBHL is briefl...

Страница 22: ...if the patient malingers The test will end automatically after 20 presented increments The number of detected increments is counted and indicated as percentage of the presented increments The result is only stored if minimum 10 increments has been presented If you are sure that the result of the test is consistent you can abort the test at any time by pressing the STOP 18 button The result is then...

Страница 23: ...e set to a value 5 dB above the individual pure tone hearing threshold at this frequency Instruct the patient to hold the response switch while the tone is heard and to release the switch as soon as the tone is not heard anymore Press START 19 to begin the test and present the test signal to the patient The patient response LED lights and a stopwatch counts the seconds as long as the patient respo...

Страница 24: ...B above the threshold Present the left or right stimulus presenter bar 2 Adjust the level of the hearing impaired ear with the level control 1 until the loudness in both ears matches Press the left or right save button 3 Repeat the test for several levels To perform the test at another frequency press the frequency up or down key 4 or 5 A new ladder diagram appears Use the functional selector butt...

Страница 25: ...agram Select 500 ms or 1000 ms as modulation time by the functional selector button 13 To exit the ABLB test screen press the button 6 5 1 10 Stenger The Stenger test is a test for malingering based on the auditory phenomenon of the referral to the ear in which the sound appears loudest Select HL to perform the Stenger test and set the left and right channel to tone Instruct the patient to press t...

Страница 26: ...e ear with a constant level for all frequencies The tone in noise hearing threshold is typically as high as the level of the noise The noise has a higher influence to neural hearing losses and the tone in noise hearing threshold will be increased Set the signal of the first channel to tone and the signal of the second channel to noise and route both channels to the same ear Set the level of the no...

Страница 27: ...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 15 Press the Monitor button 6 and then InCal 19 and the calibration screen appears On every CD with speech test material you have a reference signal such as a reference tone or speech simulating noise Play bac...

Страница 28: ...ophone and live voice using standardized word lists Different methods for speech tests are standardized worldwide such as the ASHA guidelines 1988 for SRT testing Explain to the patient that he should repeat each word he hears The patient should sit at a distance of at least 1 m from the device Eliminate any obstructions which will interfere with the placement of the earphone cushions on the ear i...

Страница 29: ...escribed above Select the test SRT WRS MCL or UCL by the functional button 13 For SRT set the level to the recommended start value and decrease or increase the level according to a correct or not correct response this procedure results in the level of the SRT Press the store button 3 to document the result For the WRS test the level remains fix and the correct and not correct answers are entered b...

Страница 30: ...nd 5 Press the functional button Play 7 to start or pause the playback of the wave files The procedure for the SRT WRS MCL and UCL test is the same like for CD or microphone testing described above For the SRT test a word need to be selected in the wordlist by the frequency up 4 or down 5 key When the button Play 7 is pressed the selected word is presented Increase or decrease the level in case of...

Страница 31: ...ise Adjust the level of the masking channel by the corresponding level control 1 for effective masking 5 2 6 Speech in noise tests Performing speech in noise tests speech and noise are given simultaneously in two channels but in the same ear The speech source can be provided by a microphone WAVE files or an external CD player Select the signal source on one channel buttons 11 or 13 and speech nois...

Страница 32: ...yer 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 or 15 Start the MHA function by pressing the Test Selection button 13 Change the dB pres...

Страница 33: ...ted 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 to the microphone socket 8 on the rear side of the device To talk to the patient hold the STIM mode TALK button pressed and talk into the gooseneck microphone Adjust the level by the left or right level control 1 during holding the STIM mode TALK button pressed 5 5...

Страница 34: ...lts 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 press the PDF button 11 A PDF will be created and stored on the SD memory card or USB flash drive for further transfer to a PC or printout via a PC connected printer Make sure that the setting PDF Save Option is set to correct storage medium...

Страница 35: ...button 2 to display the stored sessions Select a session and press the PDF button 11 to store 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 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 t...

Страница 36: ...n 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 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 t...

Страница 37: ...Bone on both channels simultaneously After a new selection the level will be reset to 30 dBHL 6 1 3 Signal selection Press either the right 11 or left 15 SIGNAL key to select the signal The kind of NOISE signal depends on the signal of the opposite channel Speech masking noise is used if a speech signal is selected on the opposite channel see also chapter 5 2 5 The display shows the selected signa...

Страница 38: ...r and adjust the parameters For the Decay or SISI test press the Start button 19 on the right side of the display to start the test Stop the test by pressing the Stop button 18 on the right side of the display To end the selected test press the Exit button 6 on the left side of the display Tracking function Press the TRACK key 14 to activate tracking Both channels will change level when only one a...

Страница 39: ...or the WRS test the display shows the percentage of correctly repeated words To count the correct words press one of the frequency up 4 keys To count the wrong words press one of the frequency down 5 keys To clear the counter press the Reset key 7 on the left side of the display Speech calibration To calibrate the MIC or CD speech input select the input with the SIGNAL selector key 11 Press the Mo...

Страница 40: ...al button 19 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 be included in the PDF or printout...

Страница 41: ... memory card To enter the User Menu press the Menu button 19 on the right side of the display To choose an item from the menu use the level controls 1 Below the box for the setting there is always a short description of the selected setting item displayed Display the sub items or change the setting of the selected item by pressing the STIM presenter bar 2 To confirm the changed setting press the O...

Страница 42: ...control jumps to 1000 Hz if the 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 is achieved Standard frequencies Select deselect Level Default level On Off Set default level after changing signal type Level Steps 5 2 1 Inverse Dialing Change effect on dialing ...

Страница 43: ...t dial controls level of the left ear right dial controls the level of the right ear Interchanged left and right dial controls the level of the opposite ear Presenter Duration Unlimited signal is presented as long as the STIM bar is pressed 1 5 Seconds signal is switched off after 1 5 sec User Defined duration user can define a maximum presentation duration Interrupter Presenter Mode Default Prese...

Страница 44: ... speech signals off or all signals on Tests SRT Test On Off enables or disables the SRT test Start Test Tone Speech defines test which is load after startup Printer Settings Set Printer Settings Opens a dialog to select a printer and configure its settings PDF Save Option Save on SD Card Stores PDF files always on a SD memory card Save on USB flash drive Stores PDF files always on a USB flash driv...

Страница 45: ...iogram only the 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 User Settings Export User Settings to SD Card Import User Settings from SD Card provides the possibility to store the user settings on a SD Card ...

Страница 46: ...l button OK 7 to store the changes or Exit 6 to leave the Date Time setting screen without saving the changes 7 2 Set Printer Settings Select the according printer by turning the left or right level control 1 down The color mode is automatically adjusted Only if the color mode is wrong adjust the color mode as well Jump to the field Paper size by pressing the stimulus presenter bar several times a...

Страница 47: ...t your printer settings by a sample print before starting the audiological assessment Wrong 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 ...

Страница 48: ...be activated be 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 42 and switch it on The feature will be activated automatically and the functionality will be available The act...

Страница 49: ...nly and click on the Next button Figure 21 Installation advice Select automatical installation in the next dialog window and click again on the Next button Wait till the MAICO MA4x family driver is installed and the operating system is updated Click on the Finish button when the installation of the driver is completed The new hardware is now ready to use Figure 22 Installation Now you can start up...

Страница 50: ... Directive 93 42 EEC Test Frequencies 125 Hz 8 000 Hz optional 125 Hz 20 000 Hz Level step 5 dB 2 dB or 1 dB level steps user selectable Maximum Sound Pressure Level AC with earphone DD45 10 dBHL to 120 dBHL BC with bone conduction with B 71 10 dBHL to 80 dBHL Insert earphones Ear 3A 10 dBHL 120 dBHL Sound field speaker CD 220 10 dBHL 90 dBHL Test Signal Pure tone pulse tone warble tone Masking Si...

Страница 51: ...Patient Response Handheld response switch Monitor Build in monitor speaker headset Communication Talk forward and talk back Data Connection USB LAN Ethernet External Devices CD Player USB printer USB keyboard Supported printers HP PCL 3 and PCL 5e Epson ESC P2 LQ Stylus Color Canon iP100 iP90 BubbleJet Stimulus Functions Tone presenter interrupter Interlock tone presentation of both channels simul...

Страница 52: ... of Operation Continuous Environment Conditions 15 35 C 59 95 F operation 5 50 C 41 122 F transport Humidity 30 90 Dimensions W x D x H 34 5 x 20 x 8 cm 13 4 x 7 9 x 3 2 Weight 1 5 kg 2 7 lbs Power Supply 100 240 V 50 60 Hz 10 Power Consumption Approximately 25 60 VA Device Fuses 2x 1A slow blow ...

Страница 53: ...witch RI 500 7 Talk Back microphone ZI 1 k UI 0 38 500 mVeff 8 Mic Microphone ZI 1 k UI 0 38 500 mVeff 9 Mon Monitor phone ZA 250 UA 8 Veff 10 CD Input ZI 47 k UI 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 16 Phone left headphone ZA 10 UA 1 Veff 17 Phone ...

Страница 54: ...rd 2 GB 8010775 Optional accessories Item Article Number HDA300 headphones for high tone audiometry 8103867 High Tone License for HDA300 8110672 HOLMCO 8103 Headphones 8010878 TDH39 headphones 8010806 Ear 3A insert phones 8010959 Canton CD220 speaker single unit 8110906 Cable for Canton CD220 8004229 SBC speakers mobile 8111951 Monitor headset with mic 8010870 Monitor phone 8111857 USB cable 80112...

Страница 55: ...odify 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 during the guarantee period please enclose evidence of purchase with the instrument In order to ensure that your instrument works pr...

Страница 56: ...n 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 42 audiometer is constructed to comply with protection class I of the international standard IEC 601 1 EN 60601 1 The instruments are not intende...

Страница 57: ...rective we will drop our liability if these checks are not done The use of non calibrated audiometers is not allowed 14 3 Device control The user of the instrument should perform a subjective instrument check once a week This check can be done following the list for subjective instrument check see next page For your own security you should copy the enclosed list fill it in once a week and store it...

Страница 58: ... noise Right Ear Level Left Ear kHz 0 25 0 5 1 2 3 4 6 8 0 25 0 5 1 2 3 4 6 8 kHz AC 30dBHL 50dBHL 70dBHL BC 30dBHL 50dBHL 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 Air Conduction Audiogram Right Ear Level Left Ear kHz 0 25 0 5 1 2 3 4 6 8 0 25 0 5 1 2 3 4 6 8 kHz Should dBHL Left Earpiec e Is dBHL Left Earp...

Страница 59: ...RETSPL dB re 20µPa NBN RETSPL dB re 20µPa Max Tone dBHL Max NBN dBHL 125 47 5 51 5 90 75 250 27 0 31 0 110 95 500 13 0 17 0 120 110 750 6 5 11 5 120 110 1000 6 0 12 0 120 110 1500 8 0 14 0 120 110 2000 8 0 14 0 120 110 3000 8 0 14 0 120 110 4000 9 0 14 0 120 110 6000 20 5 25 5 120 110 8000 12 0 17 0 110 100 Signal IEC60645 2 RETSPL IEC Max Level dBHL ANSI S3 6 RETSPL ANSI Max Level dBHL Speech 20 ...

Страница 60: ...60645 2 RETSPL IEC Max Level dBHL ANSI S3 6 RETSPL ANSI Max Level dBHL Speech 20 0 110 19 5 110 SN 20 0 110 19 5 110 WN 0 0 110 0 0 110 Calibration values and Max Levels Headphone Holmco 8103 Coupler IEC 60318 3 Force 4 5 N ANSI and IEC Frequency Hz Tone RETSPL dB re 20µPa NBN RETSPL dB re 20µPa Max Tone dBHL Max NBN dBHL 125 39 5 43 5 90 80 250 25 0 29 0 105 95 500 18 5 22 5 110 100 750 13 5 18 5...

Страница 61: ...0 8 0 120 105 1500 3 0 9 0 120 105 2000 0 0 6 0 120 105 3000 3 0 3 0 120 110 4000 0 5 4 5 120 110 6000 21 0 26 0 110 95 8000 23 0 28 0 110 95 9000 27 5 32 5 100 90 10000 18 0 23 0 105 95 11200 22 0 27 0 105 90 12500 27 0 32 0 100 85 14000 33 5 38 5 90 75 16000 45 5 50 5 75 60 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 ...

Страница 62: ...15 110 39 5 6000 2 0 7 0 100 100 8000 1 0 4 0 95 95 42 5 Signal IEC60645 2 RETSPL IEC Max Level dBHL ANSI S3 6 RETSPL ANSI Max Level dBHL Speech 20 0 100 12 5 100 SN 20 0 100 12 5 100 WN 0 0 100 0 0 100 Calibration values Bone conductor Radioear B71W Force 4 9 5 9 N Mastoid placement Frequency Hz Reference equivalent threshold force level for tone Air radiation Max level ISO 389 3 ANSI S3 6 mean m...

Страница 63: ...ax Level dBHL CD220 SBC ANSI S3 6 RETSPL dBSPL ANSI Max Level dBHL CD220 SBC Speech 0 0 90 80 14 5 90 80 SN 0 0 90 75 14 5 90 75 WN 0 0 90 75 0 0 90 75 Frequency Hz Tone RETSPL dBSPL NBN RETSPL dBSPL Max level Tone dBHL CD220 SBC Max level NBN dBHL CD220 SBC 125 22 0 22 0 65 55 250 11 0 11 0 75 70 500 4 0 4 0 85 85 75 75 750 2 0 2 0 85 85 75 75 1000 2 0 2 0 85 85 75 75 1500 0 5 0 5 90 85 80 75 200...

Страница 64: ...uctions_8100460 6_MA42_e_15a 62 8100460 6 1 15 Specifications are subject to change without notice MAICO Diagnostic GmbH Salzufer 13 14 10587 Berlin Germany Tel 49 3070 71 46 50 Fax 49 30 70 71 46 99 E mail sales maico biz Internet www maico biz ...

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