Maico MA 42, Руководство по эксплуатации, Страница: 33 / 82

Operation Manual MA 42
8100460 Rev.7 Ver.1 28 12/15
6.1.10 MLB
The MLB (Monaural Level Balance) test is used to detect perceived loudness
differences between two frequencies in the same ear. A tone with two
alternating frequencies is presented to the same ear. The level of the
frequency with normal hearing threshold is adjusted until it matches the
loudness of the other frequency. The patient has to indicate if the loudness of
both frequencies is equal.
To start the test select OT Test with the functional selector button (13),
choose MLB (15), then the MLB test screen will be displayed:
Figure 9 – MLB Screen
Select the left or right ear by the functional selector button (9). Then select
left and/or right frequency up or down buttons (4) or (5) for selection of the
frequencies to test. Adjust the level by the level controls (1). Present the
stimulus using the Stim button (2). Press the Store button (3) to save the level
of equal loudness. Repeat the procedure for several different levels.
To compare the loudness of further frequencies press the frequency up (4) or
down button (5), a new ladder diagram will appear. Use the functional
selector button, (9) or (11), to jump to the previous or next diagram. Select
500 ms or 1000 ms as modulation time by the functional selector button (13).
To exit the MLB test screen press the Exit button (6).