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- MA 53
- Operating Instructions Manual
Maico MA 53 Operating Instructions Manual
Summary of MA 53
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Maico diagnostic gmbh operating instructions maico ma 53 maico diagnostic gmbh, salzufer 13/14, d 10587 berlin, tel. ++49 30/70714650, fax ++49 30/70714699.
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Operating instructions ma 53 geba_ma53_e_13a.Doc 1 851 430/3 11/11 table of contents page 1 introduction ............................................................................................. 4 2 description ........................................................................................
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Operating instructions ma 53 geba_ma53_e_13a.Doc 2 851 430/3 11/11 5.1 connecting the speech source ............................................................. 25 5.1.1 connecting a cd-player ................................................................ 25 5.1.2 connecting a microphone ...........
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Operating instructions ma 53 geba_ma53_e_13a.Doc 3 851 430/3 11/11 6.14 talkback microphone and monitor volume control ............................. 33 6.15 speech audiometry ............................................................................ 33 6.16 speech calibration ........................
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Operating instructions ma 53 geba_ma53_e_13a.Doc 4 851 430/3 11/11 1 introduction thank you very much for purchasing a quality product from the maico family. This ma 53 audiometer is manufactured to meet all quality and safety requirements, and has been certified with the ce-symbol according to medi...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 5 851 430/3 11/11 2 description the ma 53 is a two-channel audiometer for pure tone and speech audiometric tests. It can be used for ent diagnostics and hearing aid fittings in the office, and for mobile audiometry in clinics, homes and abroad. Tests ...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 6 851 430/3 11/11 the large backlighted lcd-display shows level, frequency, transducer, signal and other information for each channel. As a result of modern microprocessor technology, the ma 53 is easy to use and is extremely reliable. The audiometer ...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 7 851 430/3 11/11 3 getting started 3.1 unpacking your instrument your ma 53 was carefully inspected and packed for shipping. However, it is a good practice to thoroughly inspect the outside of the shipping box for signs of damage. If any damage is no...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 8 851 430/3 11/11 3.2 preparing the ma 53 for use the ma 53 with its integrated compartment for the accessories is perfect for portable use. The rugged housing, light weight and the comfortable handle make it easy and convenient to transport the instr...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 9 851 430/3 11/11 the test room must be at normal temperature, usually 15 c / 59 f to 35 c / 95 f, and the instrument should be switched on about 10 minutes before the first measurement to guarantee precise measuring results. If the device has been co...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 10 851 430/3 11/11 selected. The frequency is changed with up , → and down , buttons for both channels together. The design of the ma 53 makes it easy to control level, signal presentation and frequency with one hand. 3.3.1 using the keyboard of ...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 11 851 430/3 11/11 swap function: exchanges the outputs for both ears (i.E. The right controls now affect the left ear). Tracking function: enables the automatic tracking (see chapter 4.4 masking). 2nd. Level: enters level step selection menu. The act...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 12 851 430/3 11/11 3.3.2 the display of the ma 53 the large backlighted graphical lcd- display of the ma 53 shows all actual settings and test results. The display area is split with a line into an upper or main area and a lower or advanced area (se...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 13 851 430/3 11/11 4 pure tone audiometry 4.1 air conduction (ac) testing in the hearing threshold test, the hearing threshold of the patient is measured in comparison with the normal hearing threshold for air conduction. The test is started on the ea...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 14 851 430/3 11/11 when you find a stable threshold value, note the level and frequency. If the ma 53 is connected to a pc, the value was stored with your last stim presentation. Test through the frequencies. Starting at 1 khz set the higher frequenci...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 15 851 430/3 11/11 s mcl (most comfortable level). The ucl level is described as the level between very loud and loud perception of the test signal. Press the receiver selector button or longer than 2 seconds. The lcd- display in the upper row chang...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 16 851 430/3 11/11 4.4 masking of the opposite ear the basics of masking are explained below. To begin testing immediately, please go directly to 4.4.3 manual masking. 4.4.1 crossover: when measuring a pure tone audiogram you assume that the measured ...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 17 851 430/3 11/11 notice that the masking sound is continuously presented for effective masking. You can interrupt the masking signal by pressing the corresponding interrupter key or ↔. To mask when performing bone conduction testing, place the he...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 18 851 430/3 11/11 4.5 diagnostic tests 4.5.1 suprathreshold tests the ma 53 offers additional suprathreshold tests which can offer more information about the kind of the hearing loss. To access suprathreshold tests press the pulse button longer tha...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 19 851 430/3 11/11 4.5.1.2 the dli (lüscher) test the intensity difference limen for loudness test (or just noticeable difference, jnd) is another recruitment test. A pure tone is amplitude modulated at a rate of 2/second. The patient has to determine...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 20 851 430/3 11/11 4.5.1.3 the sisi test the sisi ( short increment sensitivity index) is guided by the principle that patients with cochlear impairment are hypersensitive to small intensity increments. The continuous test tone is increased by 1 db fo...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 21 851 430/3 11/11 picture 20 ma 53 display with sisi conditioning 5db and presented increment on the lower area of the lcd display (see picture 20). The text “answer now” appears for approx. 1.5 seconds. During this period the patient may respond. ...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 22 851 430/3 11/11 4.5.2 the stenger test the stenger test is conducted as a malingering test in cases of alleged hearing loss or unilateral deafness. It is based on the premise that when two tones of the same frequency are presented simultaneously in...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 23 851 430/3 11/11 when the patient releases the switch the bar of the stop watch stops and you can see the time the patient heard the tone (see example picture 25). If the time was less than 60 seconds increase the level with the level control knob ...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 24 851 430/3 11/11 4.7 free tunable frequencies in 1 hz steps (ftf) this feature is activated by pressing the right frequency button simultaneously. This feature is just a gimmick to show the possibilities of the instruments. 4.8 high frequency audiom...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 25 851 430/3 11/11 5 speech audiometry 5.1 connecting the speech source 5.1.1 connecting a cd-player to conduct speech tests using speech test material you can connect a cd-player to the ma 53. Use a standard phono plug cable to connect the right and ...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 26 851 430/3 11/11 5.2 speech calibration 5.2.1 calibration of the cd with speech test material the ma 53 must be calibrated to the particular speech test material in use to ensure valid test levels. That means every time you change the cd or tape you...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 27 851 430/3 11/11 settings in % of the maximum calibration for both channels. Position yourself the customary distance from the microphone and speak test words. Use the left knob to adjust the level until both vu-meters and show all yellow and ...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 28 851 430/3 11/11 5.4 speech audiometry the speech-recognition threshold srt is the hearing threshold for speech. It is the lowest level at which the patient correctly recognizes the stimuli 50% of the time. Usually, recognition is indicated by repet...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 29 851 430/3 11/11 if you are working online with a pc press the stim bar or ↔ to transfer the test result to the pc (see also chapter 9). To clear the counter for the next test, press the fm key . It is also possible to perform the speech test wi...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 30 851 430/3 11/11 6 quick reference guide 6.1 startup settings air conduction on both channels pure tone on both channels 30dbhl on both channels presenter mode 6.2 receiver selection press either the right or left receiver key to select the rece...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 31 851 430/3 11/11 6.5 frequency selection use one of the two sets of frequency keys / or / to select the frequency. The maximum and minimum frequency depends on the receiver you have selected. 6.6 warble tone (fm) press the fm key to activate t...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 32 851 430/3 11/11 to cancel the conditioning and the sisi test and to return to standard operation press the swap key . After 20 increments the sisi test is finished. The text sisi result with the result in percentage is shown. You can stop the sisi...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 33 851 430/3 11/11 6.12 interlock function press the stim mode key longer than 2 seconds to activate the interlock function. The display shows the text interlock. Interlock works only if both channels have the same kind of signal (speech, tone or ...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 34 851 430/3 11/11 right knob ↕ for the right channel and adjust the levels until both vu-meters and show all yellow and one green light. If one or more red lights are on, reduce the level using the corresponding knobs or ↕. Store the calibratio...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 35 851 430/3 11/11 the user preference menu has the following selections: off signal enable/disable switch off position of signal selector key and start with ip* default setting of insert instead of ac start tone / nbn initial masking setting of r...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 36 851 430/3 11/11 7 advanced features 7.1 complex mixing the complex mixing feature of the ma 53 allows the operator to route two different test signals to the same ear. The test signals and the test levels are independently adjustable but will be pr...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 37 851 430/3 11/11 7.2 advanced noise selection the ma 53 offers for advanced masking or testing the selection of narrow band noise, speech masking noise and white noise as test signal. Enable this feature from the user setup menu the additional signa...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 38 851 430/3 11/11 7.4 assistant phone the optional assistant phone allows the operator to speak directly to an assistant person in the sound excluding booth. This could be a parent when measuring children. The operator speaks to the assistant person ...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 39 851 430/3 11/11 8 recommended literature audiometric interpretation: a manual of basic audiometry lloyd, lyle l., and harriet kaplan baltimore: university park press, 1980 auditory disorders: a manual for clinical evaluation jerger, susan, and jame...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 40 851 430/3 11/11 9 computer interface the ma 53 can be connected for data transfer to a pc. Caution: the computer you are using must meet electrical safety requirements, such as iec 601-1 or ul. This is to avoid electrical shock of either the patien...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 41 851 430/3 11/11 10 care and maintenance of the instrument disconnect the power plug before cleaning! To clean the instrument, headphones, bone conduction receiver, loudspeaker and other accessories use a soft cloth dampened with a little warm soapy...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 42 851 430/3 11/11 11 trouble shooting if you should find that your instrument is no longer working properly during a test run, please check the following points: diodes in the buttons do not light up and there is nothing to see on the lcd-display : ...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 43 851 430/3 11/11 12 technical data the ma 53 audiometer is an active, diagnostic medical product according to the class iia of the eu medical directive 93/42/eec. Standards: iec 601-1class ii, protection class bf iec 645-1/ en 60 645-1: type 2 iec 6...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 44 851 430/3 11/11 ff with optional loudspeaker type canton: - 10 dbhl... 90 dbhl (measurement in 1m distance) ( 1 khz, 1.5 khz -10 dbhl ... 85 dbhl) ( 500 hz, 750 hz -10 dbhl ... 80 dbhl) ( 250 hz, 6 khz, 8 khz -10 dbhl ... 75 dbhl) ( 125 hz -10 dbhl...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 45 851 430/3 11/11 environment conditions: + 15 ... + 35 c / + 59 ... + 95 °f (operation) + 5 ... + 50 c / + 41 ... + 122 °f (storage) maximum humidity 90 % (storage and operation) according to water: ordinary equipment according to sterilization: not...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 46 851 430/3 11/11 connection plugs: connection specification a power socket left/right=power, middle=prot.Gnd (100 ... 240 v~ 50/60 hz) b power fuses 1 a slow blow c serial pc-interface 1=gnd, 2=rx, 3=tx, 5= gnd, 6=dtr rs 232 c d patient response swi...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 47 851 430/3 11/11 calibration values: ac-receiver dd 45 force: 4 ... 5 n frequency [hz] reference equivalent threshold sound pressure level sound damping iso 389 - 1 with coupler iec 318-2 [db] (re 20 pa ) ansi s3.6-1 with coupler nbs 9a [db] (re 20...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 48 851 430/3 11/11 calibration values: ac-high frequency receiver sennheiser hda 200 force: 9 ... 10n frequency [hz] reference equivalent threshold sound pressure level sound damping iso 389 - 5 with coupler iec 318 and type 1 adapter [db] (re 20 pa ...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 49 851 430/3 11/11 calibration values: ff : free sound field (0 degree incidence) frequency [hz] reference equivalent threshold sound pressure level iso 389 - 7 [db] (re 20 pa ) ansi s3.6-1996 [db] (re 20 pa ) 125 22 22 250 11 11 500 4 4 750 2 2 100...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 50 851 430/3 11/11 standard accessories: 1 air conduction receiver dd 45 1 bone conduction receiver radio ear b 71 1 microphone (for live speech) 1 patient response switch 1 power cord 1 pad of audiogram paper (50 sheets) optional accessories: loudspe...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 51 851 430/3 11/11 13 warranty, maintenance and after-sales service the maico ma 53 is guaranteed for 1 year. This warranty is extended to the original purchaser of the instrument by maico through the distributor from whom it was purchased and covers ...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 52 851 430/3 11/11 14 safety regulations 14.1 electrical safety: the ma 52 audiometer is constructed to comply with protection class ii of the international standard iec 601-1 (en 60601-1). Protection from an electric shock is ensured even without the...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 53 851 430/3 11/11 checklist for subjective audiometer testing - clean the ear and head cushion! - untangle all lines when necessary - are the headphone cushions in good condition? If not replace - are plugs and leads in good condition / undamaged? ...
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Operating instructions ma 53 geba_ma53_e_13a.Doc 54 851 430/3 11/11 specifications are subject to change maico diagnostic gmbh salzufer 13/14 1058 berlin telefon +49 3070 71 46 50 telefax +49 30 70 71 46 99 email: export@maico.Biz internet: www.Maico.Biz.