Klarinet Archive - Posting 000034.txt from 2010/12

From: "Joseph D. Vaccarino" <clarinet@-----.com>
Subj: Re: [kl] Snake Charmers
Date: Fri, 03 Dec 2010 13:11:06 -0500

This sort of factual commentary is exactly why I have kept my subscription to Klarinet all these years!

:~)

Joseph D. Vaccarino
clarinet@-----.com

On Dec 3, 2010, at 1:05 PM, Tim Roberts wrote:

> "Jim Lytthans" <lytthans@-----.net>
>> I've been reading the many, many comments on moving clarinetists. My real
>> issue with over-done movement with wind players is the Doppler effect. I can
>> hear this moving train pitch shift on recordings of clarinetists especially,
>> and also with flutists and oboists.
>
> My initial reaction was to scoff at this. Intuitively, it seemed
> impossible that a clarinetist could generate enough speed to Doppler
> shift the pitch to a detectable degree. Being an engineer, I decided to
> run the numbers.
>
> I read that a frequency difference of 0.3% is detectable by the human
> ear. Running that through the Doppler equations, it would require a
> velocity of 0.5 meters per second to generate that difference.
>
> So, I no longer scoff. It's quite possible for an over-enthusiastic
> player to move their bell at a rate higher than 0.5m/s.
>
> --
> Tim Roberts, timr@-----.com
> Providenza & Boekelheide, Inc.
>
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