Loudness "fatigue" with two ears but not with one: simultaneous dichotic loudness balance (SDLB) explained

  • Lance Nizami Independent Research Scholar, Palo Alto, California, USA

Abstract

In SDLB (1950 onwards), the loudness contribution from the continually exposed “fatiguing†ear is matched by adjusting the intensity of an intermittent stimulus at the other (“comparisonâ€) ear. The latter intensity declines, indicating “loudness fatigueâ€. However, the loudness of a continuous well-supra-threshold stimulus to one ear (with the other in quiet) does not diminish. Here is a quandary, presently resolved through a novel model dependent upon (1) the aforementioned non-fatiguing, and (2) the olivocochlear bundle, which “turns down the volume†in the ear opposite to one experiencing stimuli. The model explains how “fatigue†varies with stimulus variation, revealing “fatigue†as an SDLB artifact.

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Published
2012-10-24
Section
Full Articles