Klarinet Archive - Posting 000230.txt from 1998/01

From: "Leo van Zantvoort" <leovz@-----.nl>
Subj: Re: A440
Date: Tue, 6 Jan 1998 08:18:34 -0500

If you have passed your grade on that one they made a great mistake! All is trough on the lengt of the
pipe and so on, execpt the reed fibrating thing!!

Of course it vibrates on the freqentie wich the resonating pipe allowes it!! (talking about living on an
island...)

On Sun, 4 Jan 1998 22:49:54 -0700 (MST), J. Shouryu Nohe wrote:

>Are you SURE the reed vibrates 440 times when we play a concert A? After
>this years Musical Physics class, I find that unlikely. The statement
>leads to a conclusion that the reed vibrates at different frequencies with
>different notes; that most certainly is not the case. The reed vibrates
>at a steady, constant frequency of something...I don't know what, but it
>remains constant. Notes change due to the length of pipe that the air
>vibratess within. The clarinet is what physicists refer to as a closed
>pipe system, and the different frequencies we can hear are due to change
>within the number of nodes/anti nodes you allow to occur in the pipe. If
>you change the length of the pipe (opening and closing holes), in order to
>keep those nodes/antinodes, the AIR vibrating compensates by changing
>frequency, not the reed. (There's some more stuff having to do with
>wavelengths and whole odd intergers...but I already sold my book because I
>didn't like the class, and am just happy to have passed it...actually, I
>haven't checked my grades yet, so I don't know that I HAVE passed it....)