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Operating Instructions MA 42

Operating_Instructions_8100460-6_MA42_e_15a 27 8100460-6 1/15

by selecting swap. The current settings of the channels are exchanged. Settings

for the swap function can be adjusted in the user menu.

Select Phones, Insert, Bone or Speaker (only calibrated receivers are available)

by the receiver select button (10), (16).

5.2.3 Speech Audiometry with Microphone or CD Player

Connect the microphone or CD player to corresponding input (10) on the rear

side of your MA 42. Set the signal of the test channel to microphone or CD by

the functional selector button (11), (15). Make sure that the input signal is

calibrated correctly, like described 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 by the frequency plus (4) and minus (5) button. Store the

established WRS value and proceed at the next level. To clear the word counter,

press the Reset key (6) on the left side of the display.

If MCL is selected, the level need to be adjusted till it is comfortable to listen to.

Then store the value by the store button (3).

For the UCL test the level is increased till it is indicated as uncomfortable and

the result stored by pressing the store button (3).

Maico MA 42 Operating Instructions

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