Re: Bite-induced pitch shift? (Bob Masta )

Subject: Re: Bite-induced pitch shift?
From:    Bob Masta  <masta(at)UMICH.EDU>
Date:    Sat, 12 Jul 2003 09:55:34 -0400

The fact that beats slow down fits with the idea that the received frequencies are changing, perhaps by a shift of the basilar membrane. To make a simple example, if the original tones were 100 and 110 Hertz you would get a 10 Hertz beat. If everything shifts down by 10% to 90 and 99 Hertz you would get a 9 Hertz beat. A constant percentage shift implicates a linear shift of the activation areas of the basilar membrane, but it's not obvious that the clench-applied tension would give this result. A percentage shift would produce bigger absolute differences between harmonics than between fundamentals, so that may explain your results there. On 11 Jul 03, at 20:52, Thomas G Brennan wrote: > Having generated various pure tones I have found, at least for me, that beats > tend to slow between pure tones when I clench my jaw. However, if I add > harmonics I believe what is happening is that beats related to the tones used > (partials) tend to speed up and these latter sets of beats either break up into > nonsense beats or become so fast that I cannot count them. > > 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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