Interacoustics AA222 Instructions For Use Manual page 233

AA222 Instructions for Use – US
3.7.1.2 ABLB - Fowler
ABLB (Alternate Binaural Loudness Balancing) is a test to detect perceived loudness differences between
the ears. The test is designed for people with unilateral hearing loss. It serves as a possible test for
recruitment.
The test is performed at frequencies where recruitment is presumed. The same tone is presented alternately
to both ears. The intensity is fixed in the impaired ear (20dB above pure tone threshold). The task of the
patient is to adjust the level of the better ear until the signal in the two ears is of equal intensity. Note,
however, that the test may also be performed by fixing the intensity in the normal hearing ear and having the
patient set the tone for the impaired ear.
The function buttons Q, T, U, V, Y are available from the ABLB test screen.
3.7.1.3 Tone in noise (Langenbeck)
For a description of the function keys in Tone in Noise please refer to the pure tone audiometry test screen.
The function keys available for the screen are Q, R, T U, X, Y.
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