Date: Sat, 27 Mar 2004 13:06:30 -0600
From: Barbara Reynolds <br_auditory@hotmail.com>
To: g_brennantg@TITAN.SFASU.EDU, AUDITORY@LISTS.MCGILL.CA
Subject: Re: Inexpensive hearing aids - Consideration of Piano harmonics
I don't have the equipment to be that exact. I fit on a general
principle that keeps in mind that I am working with a musician with an
expanded representation for sound that is different than non-musician's.
They may not like the sound of an aid precisely because I haven't matched
a certain band of frequencies as well as I could if I tried to shift the
response of the aid off the more traditional "pure tone"
recommendations. Pure tones don't occur in nature, so why should we be
married to the idea that people hear the best when we match the
prescription formulas or the audiogram to a psychological, subjective
system.
I've noticed that some people are spend too much time on the specifics
rather than the general priniciple. I'm not concerned with exact
measurements, but I am concern with the difference in programming that
may be necessary because of vastly different auditory systems based on
environmental or genetic influences.
Please don't get hung up on the specifics, see the point for what it was.
>From: g_brennantg@TITAN.SFASU.EDU
>To: Barbara Reynolds <br_auditory@HOTMAIL.COM>
>CC: AUDITORY@LISTS.MCGILL.CA
>Subject: Re: Inexpensive hearing aids - Consideration of Piano harmonics
>Date: Fri, 26 Mar 2004 19:39:09 -0600 (CST)
>
>Barb, I'm inpressed if you have instrumentation to fit to exact tones
such as
>"2048" which is, by the way, a C of 512 which is not a temered C so
would
>usually be inappropriate to fit as a tempered C is at
523.25. Interestingly,
>this makes your C at 2048 come out at 2093 which is only three cycles
less than
>being out by the same amount your 2048 would be from the 2000 of the
audiometer.
>
>As an aside, if we multiply the A which is the more commonly used not
for
>tempering scales, that has your A at 1600. In Europe rather than using
440
>currently many people now use 442 which brings the 1600 to 1608. Of
course, all
>of this becomes of questionable value either in a porrly tempered scale,
with a
>piano either flat or sharp in pitch (this applies to other instruments
as well)
>or with instruments which are not tempered or which are not equal
temered.
>Since the band spreads on audiometers are standardized to neural
response etc.
>al be it sometimes after the fact, I am still left with the question of
how much
>good this actually does for a client. I also wonder about these single
cycle
>frequency adjustments to aids.
>
>Thanks.
>
>Tom
>
>
>
>Tom Brennan KD5VIJ, CCC-A/SLP, R/D - AU
>web page http://titan.sfasu.edu/~g_brennantg/sonicpage.html
>
>
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