PMID: 9447916Feb 3, 1998Paper

Basilar membrane velocity noise

Hearing Research
A L NuttallD F Dolan

Abstract

Basilar membrane (BM) noise, measured as a velocity signal under the quiet acoustic condition, was investigated in the guinea pig. The cochleas of anesthetized young healthy guinea pigs were surgically exposed and a hole was made on the lateral wall of the scala tympani of the first cochlear turn for visualization of the BM and measurement of the BM velocity with a laser interferometer. The amplitude and frequency of the BM velocity noise were analyzed by a spectrum analyzer under different conditions. The spectrum of the BM velocity noise was a band limited function with a peak velocity at the topographic best frequency of the measured location on the BM. The peak velocity ranged to about 8 microm/s and depended on the physiological condition of the cochlea. Saline blockage of the external auditory canal or the middle ear did not change the BM noise. BM noise was much smaller, or was not evident, when the cochlear sensitivity decreased. The suppression tuning curve of the BM velocity noise indicates that the maximum suppression caused by an acoustic pure tone occurred at the best frequency location. A low sound level wide band acoustic noise given to the external ear canal produced a spectrum function having the same frequency...Continue Reading

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Citations

Apr 18, 2008·Cell and Tissue Research·Otto Gleich, Ana Luisa Piña
Jun 5, 2003·Journal of the Association for Research in Otolaryngology : JARO·E Christopher Kirk, David W Smith
Jan 28, 2005·Journal of the Association for Research in Otolaryngology : JARO·A L NuttallT Ren
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Jul 10, 2014·Reports on Progress in Physics·Tobias Reichenbach, A J Hudspeth
Jun 28, 2001·Physiological Reviews·L Robles, M A Ruggero

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