Operating Instructions MA 42
Operating_Instructions_8100460-6_MA42_e_15a 26 8100460-6 1/15
Store the calibration and leave the calibration mode with the Exit button on the
left side of the display.
5.2.2 Performing the Test
Use the functional button Speech on the right side of the tone screen (18) to
switch to speech testing. The speech test screen opens, the right ear is selected
and the level is set to the default value.
The speech recognition threshold SRT is the hearing threshold for speech. It is
the lowest level at which the patient correctly recognizes 50% of the speech.
Usually, recognition is indicated by repetition of the speech-stimulus item. The
speech test can be done with recorded speech test material from CD or with
the microphone 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.e. hair, eyeglasses). 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 exactly facing the ear canal).
The signal can be set to microphone, CD or Wave or switched off, for each
channel independently by the functional selector buttons (11) and (15). Each
channel can be routed to the left or right ear by the functional selector buttons
(9) or (17), this enables flexible mixing. It is easy to switch over to the other ear
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