Klarinet Archive - Posting 000789.txt from 1998/09

From: Michael Cogswell <Michael_Cogswell@-----.com>
Subj: RE: [kl] Pitch standard confusion
Date: Tue, 22 Sep 1998 10:49:05 -0400

Actually, when a cylinder expands the bore gets bigger not smaller. The
expansion causes an increase in the circumference, hence the inside diameter
increases. However, it is relatively moot. I'm in agreement with the
argument that the change in air density is much more significant.

-----Original Message-----
From: Bill Hausmann [mailto:bhausman@-----.com]
Subject: Re: [kl] Pitch standard confusion

At 09:48 AM 9/19/98 -0500, Dee Hays wrote:
>If the change were due to changes in the instrument length, they would get
>longer in the heat (i.e. flatter) rather than sharper as is the case in the
>real world. Notice how much players have to pull their barrel or tuning
>slide on a hot day to match an electronic tuner. They don't push them in
>unless they have pulled them too far in the first place.
>
Right. The change thermal expansion causes is NOT so much in the length of
the instrument, but in the diameter of the bore. When the wood expands,
the diameter SHRINKS. Only a very small change is required to be
significant, relative to overall length.

Bill Hausmann bhausman@-----.com
451 Old Orchard Drive http://www.concentric.net/~bhausman
Essexville, MI 48732 http://members.wbs.net/homepages/z/o/o/zoot14.html
ICQ UIN 4862265

If you have to mic a saxophone, the rest of the band is too loud.

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