Klarinet Archive - Posting 000333.txt from 2004/06

From: ormondtoby@-----.net (Ormondtoby Montoya)
Subj: RE: [kl] Round?
Date: Mon, 21 Jun 2004 12:13:47 -0400

Karl=A0Krelove wrote:

> Otherwise, "if it ain't broke...."

I understand. It's my barrel, it's not broke, and I have no desire to
do anything to it.

What prompted my question was that I was measuring the barrel carefully
with two different gages (caliper and bore gauge) in order to discover
how close the barrel is to the 'traditional' Moennig taper (0.589" and
0.580"). I wasn't astonished to find that the barrel is a tiny bit
different, but I was unprepared to discover that it isn't round; and I
began to wonder.

Keith wrote:

> I don't think there is any acoustic reason why
> a barrel has to be round. I think that the
> vibration modes in the barrel will be
> dominated by the cross-sectional area rather
> than the shape. [snip] will usually cause the
> bore to become oval. This is because the
> shrinkage contraction is different in different
> directions in the wood (radially and
> tangentially relative to the original log).

I had wondered about shrinkage/expansion in different directions in
relation to the grain. The barrel was, to the best of my knowledge,
built in England, played in the Arizona desert for a few years, played
on the Pacific coast for several more years, and finally stored unplayed
for several years. So there was plenty of opportunity for the wood to
move.

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