Re: Auditory efferents and phase locking (Matt Flax )


Subject: Re: Auditory efferents and phase locking
From:    Matt Flax  <flatmax@xxxxxxxx>
Date:    Thu, 1 Sep 2011 11:33:25 +1000
List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>

I understand this point of view, that gain-control is primarily protective ... if you follow that line of literature and theory, we have the classical view of hearing ... augmentation of the passive travelling wave to get the active travelling wave. Where local amplification away from the best frequency acts to restrict movement... to protect. In this argument, we can only assume that emissions occur from backwards travelling waves ... do you agree - or am I jumping the gun like Usain Bolt (2011 - world championships) ? So here I sever the classical view from the non-classical view. We have to turn back to experiments which look at how the waves travel in the Cochlea. Ren.T. clearly shows (in most of his body of work) forward active travelling waves (in the base). Wilson (1980) agrees with him. Ruggero similarly is most likely in agreement [1]. And all of this is in the base of the Cochlear ... what happens in the apex is a toatally different story. Matt p.s. If it was to protect, then why is Presbycusis so bad ? [1] Ruggero, M.A., "Comparison of group delays of 2f- f distortion product otoacoustic emissions and cochlear travel times", Acoustics Research Letters Online 5 (2004), pp. 143. On Wed, 2011-08-31 at 16:54 -0700, Richard F. Lyon wrote: > Perhaps the > gain-control role is primarily protective, as many have speculated?


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