Maico MA 42, Руководство по эксплуатации

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Operation Manual MA 42
8100460 Rev.7 Ver.1 34 12/15
button Play (7) is pressed, the selected word is presented. Increase or decrease
the level when the patient has a correct or incorrect response until the SRT is
estimated and store the result by pressing the Store (3) button.
For the WRS test, 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. The correct word is displayed green,
while incorrect word is displayed red. By pressing Repeat (7), the word will be
repeated. Once a wave file has been selected, the intensity cannot be
changed. Select the presentation level before selecting Play (7).
The percentage of the speech discrimination score is displayed and will be
stored in the speech table or audiogram as soon as Store (3) is pressed.
Press the functional button List (6) to load another word list.
MCL and UCL measurements are best performed with the Passage wave file
include with the device. Select the ear for testing and Wave as the speech
signal. A menu will pop-up with available word lists which are stored on the
SD memory card, select Passages. Press the function button Play (7) to start
the presentation. Rotate the level control (1) to increase the volume until the
patient reports this is uncomfortably loud. Press Store (3) to save the results.
6.2.5 Masking
Speech audiometry has similar masking rules to those described in chapter
5.1.1.1 for pure tone audiometry. The signal of the non-testing ear is set to
speech noise (SN), instead of narrowband noise, by the functional selector
button signal (11) or (15). This channel needs to be set to interrupter mode by
pressing the channel Stim button (8) for continuous presentation of the
masking noise. Adjust the level of the masking channel by the corresponding
level control (1) for effective masking.
6.2.6 Speech in Noise Tests
When 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 (button 11 or 13) and speech noise (SN) on the
other channel.
To present the speech in noise in the same ear, the noise channel has to be
routed to the same ear the speech channel (button 9 or 17). Please make sure
that the speech is presented in interrupter mode (8) in order to present both
signals simultaneously.