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Subharmonic Distortion in Ear Canal Pressure and Intracochlear Pressure and Motion

Stanley Huang; Wei Dong; Elizabeth S. Olson

Title:
Subharmonic Distortion in Ear Canal Pressure and Intracochlear Pressure and Motion
Author(s):
Huang, Stanley
Dong, Wei
Olson, Elizabeth S.
Date:
Type:
Articles
Department:
Biomedical Engineering
Permanent URL:
Book/Journal Title:
Journal of the Association for Research in Otolaryngology
Abstract:
When driven at sound pressure levels greater than ~110 dB stimulus pressure level, the mammalian middle ear is known to produce subharmonic distortion. In this study, we simultaneously measured subharmonics in the ear canal pressure, intracochlear pressure, and basilar membrane or round window membrane velocity, in gerbil. Our primary objective was to quantify the relationship between the subharmonics measured in the ear canal and their intracochlear counterparts. We had two primary findings: (1) The subharmonics emerged suddenly, with a substantial amplitude in the ear canal and the cochlea; (2) at the stimulus level for which subharmonics emerged, the pressure in scala vestibuli/pressure in the ear canal amplitude relationship was similar for the subharmonic and fundamental components. These findings are important for experiments and clinical conditions in which high sound pressure level stimuli are used and could lead to confounding subharmonic stimulation.
Subject(s):
Audiology
Biomechanics
Publisher DOI:
http://dx.doi.org/10.1007/s10162-012-0326-3
Item views:
166
Metadata:
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