Re: Bite-induced pitch shift? (Thomas G Brennan )

Subject: Re: Bite-induced pitch shift?
From:    Thomas G Brennan  <g_brennantg(at)TITAN.SFASU.EDU>
Date:    Fri, 11 Jul 2003 05:06:01 -0500

In part, it may have to do with perceived resonation properties. I tend to suspect that the major cause is tightening of the eardrum and alteration to the size of the outer and middle ear spaces. Since I wrote my original response to this question I have done a few experiments with a piano. As a tuner I have experimented with hearing beats while setting a tempered octive. When clenching my jaw I tend to either completely lose the beats I can normally hear or they sound as though they have nothing to do with the actually notes usually being far faster than would be expected for the pitch change. Tom Tom Brennan KD5VIJ, CCC-A/SLP R/D - AU web page On Wed, 9 Jul 2003, Bob Masta wrote: > Date: Wed, 09 Jul 2003 08:47:45 -0400 > From: Bob Masta <masta(at)UMICH.EDU> > To: AUDITORY(at)LISTS.MCGILL.CA > Subject: Re: Bite-induced pitch shift? > > Tom: > > Thanks for your observations on pitch shift. I'm curious why a shape > change of the external auditory canal should be implicated. Does > this effect only apply to broadband signals, such that changing the > canal's resonant frequency might give a "formant" change in the > spectral shape? I can't see how it could change the pitch of a > pure tone, unless the basilar membrane is also deformed somehow. > > . > > > On 8 Jul 03, at 17:42, Thomas G Brennan wrote: > > > I neglected to say that this seems to be caused by alteration to the shape > > and/or position of the external auditory canal by the mandibular condyle. > > > > Tom > > > > > > Tom Brennan KD5VIJ, CCC-A/SLP R/D - AU > > web page > > > Robert Masta > tech(at) > > D A Q A R T A > Data AcQuisition And Real-Time Analysis > Shareware from Interstellar Research > >

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