PMID: 8609286Feb 1, 1996Paper

Mechanical and "temporal" filtering as codeterminants of the response by cat primary fibers to amplitude-modulated signals

The Journal of the Acoustical Society of America
D D Greenwood, Philip X Joris

Abstract

From previous studies it appears that at least two factors limit the upper frequency at which auditory-nerve (AN) fibers can entrain to the envelope of a sinusoidally amplitude-modulated (AM) tone. Cochlear mechanical filtering insures that, in the local motion driving a fiber tuned to the carrier, sidetone amplitudes decrease as sidetone displacement envelopes separate with modulation frequency (fm). Only if at least one side-tone's amplitude is large enough, relative to carrier's, will there be modulation of basilar motion at the point tuned to the carrier. In addition, processes within haircell and fiber limit the upper frequency at which they follow variations in amplitude. To assess change, along the cochlea, in the two factors' relative importance. AN modulation transfer functions (MTFs) [Joris and Yin, J. Acoust. Soc. Am. 91, 215-232 (1992)] were replotted versus distance in mm between sidetones and carrier, using an empirical frequency-place function [Greenwood, J. Acoust. Soc. Am. 87, 2592-2605 (990)]. MTF bandwidths, converted to mm changed little over the apical 40% of cochlea but decreased basally. Expressed in Hz, they increased from apex to base and reached an upper limit at a characteristic frequency (CF) of 20 k...Continue Reading

Citations

Jun 10, 2009·Journal of the Association for Research in Otolaryngology : JARO·Douglas C FitzpatrickBlagoje Filipovic
Nov 10, 2009·The Journal of the Acoustical Society of America·Muhammad S A ZilanyLaurel H Carney
Nov 9, 2006·The Journal of the Acoustical Society of America·Lori L Holt
Sep 2, 2015·Journal of the Association for Research in Otolaryngology : JARO·Luke A ShaheenM Charles Liberman
Apr 30, 2015·Cell and Tissue Research·Peter Heil, Adam J Peterson
Aug 16, 2016·BMC Evolutionary Biology·Wiebke S KonerdingMarina Scheumann
Dec 21, 2016·The Journal of Comparative Neurology·Gilberto David GrañaDouglas C Fitzpatrick
Mar 27, 2004·Physiological Reviews·P X JorisA Rees
Apr 8, 2004·Journal of Neurophysiology·Dries H G LouagePhilip X Joris
Feb 25, 2000·The Journal of the Acoustical Society of America·E A Strickland
Aug 26, 1998·The Journal of the Acoustical Society of America·B C MooreT Dau
Mar 2, 2021·The Journal of Physiology·Mark A RutherfordJuan D Goutman

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