[CAUT] Anechoic chamber - experiments

[johnparham at piano88.com]

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> -------- Original Message --------
> Subject: Re: [CAUT] Anechoic chamber - experiments
> From: tnrwim at aol.com
> Date: Fri, June 18, 2010 9:28 pm
> To: ed440 at mindspring.com, caut at ptg.org
> 
> 
> anechoic
> 
> Maybe I'm the only one, but I'm not familiar with this word. First, how do you pronounce it. Second, what is the dffinition. Third, what is an anechoic room?
> 
> Wim
> 
> 
> 
> 
> 
> 
> -----Original Message-----
> From: ed440 <ed440 at mindspring.com>
> To: Jim Busby <jim_busby at byu.edu>; caut <caut at ptg.org>
> Sent: Fri, Jun 18, 2010 12:30 pm
> Subject: Re: [CAUT] Anechoic chamber - experiments
> 
> 
> Jim-
> That's not my question.
> f you play a major third and move your head around, it may beat very clearly in 
> ne place and very little in another.
> hus I am thinking of the ongoing argument about "beatless" octaves. Perhaps the 
> eating varies depending on the location of the listening ear. If so, this 
> hould be fairly easy to detect in an anechoic chamber with the equipment you 
> escribe. This might explain why one person hears an octave as beatless and 
> nother person hears beats.
> he best octaves to test would be mid-range octaves, where the inharmonicity is 
> airly well matched, not the extreme bass octaves.
> on't re-tune the octave, move the microphone to a new location.
> Ed S.
> -----Original Message-----
> From: Jim Busby <jim_busby at byu.edu>
> Sent: Jun 18, 2010 6:14 PM
> To: Ed Sutton <ed440 at mindspring.com>, "caut at ptg.org" <caut at ptg.org>
> Subject: RE: [CAUT] Anechoic chamber - experiments
> 
> Hi Ed,
> 
> Rick Baldassin's book "On Pitch" has references to these but Rick told me that 
> hese were "not very scientific studies". Chris Robinson told me that he and 
> ick did these studies years ago and that they didn't save the studies. So, 
> ou're right. How much of the fundamental do we really hear at C1? Are Rick's 
> raphs accurate? And I've always wanted to see how much a supposedly identical 
> nison varies at the different partials. (Why no unison can be tuned perfectly 
> ure...)
> 
> Thanks.
> Jim
> 
> 
> Perhaps you can do some mapping of octaves, in particular to see if there are 
> ectors along which coincident partials beat with more or less amplitude, or, if 
> ou will, vectors for beatless octaves.
> Same could be done for other intervals.
> Like Don says, record what you find.
> Ed Sutton