Klarinet Archive - Posting 000670.txt from 2004/07

From: Gary Truesdail <gir@-----.net>
Subj: Re: [kl] Materials and vibration
Date: Sat, 17 Jul 2004 16:22:28 -0400

Clark, I am glad you made the statement regarding quality of material
making a difference. Remember in the 'old days' when a trumpet player
would buy a new horn, have the bell smashed and then have someone work
it out. They claimed the annealing changed the sound to something they
preferred.

I am just a theorist but it seems as though any material through which
passes a vibrating column of air may or may not also vibrate
sympathetically. If not, it may not have any affect, if it does vibrate
I think it would either reinforce certain frequencies in the air column
or hinder these frequencies due to nodes and antinodes fighting each
other at a given location, similar to a fan blowing up the bell of a
clarinet. I have read of experiments have been done regarding having
one tone cancel out another. These experiments were done by people
trying to eliminate highway traffic noise. Wouldn't I be great if you
had a tone generator in your car that would match the tones of the
boom-box next to you at a stop sign. Neither of you would hear a thing
and the other guy would wonder why his bass amplifier quit.

GaryT

Clark W Fobes wrote:

>Even though we seem to go around and around on this it still perturbs me
>
>
>

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