Klarinet Archive - Posting 000423.txt from 2001/06

From: David Motz <david.motz@-----.net>
Subj: [kl] open tubed vs. closed tube?
Date: Thu, 14 Jun 2001 09:48:11 -0400

I've been lurking on this list for a while now, after recently buying a
bass clarinet and joining a couple of local community bands. I thought 18
years was a long enough time to take off and that I'd better get playing
again. One of the things that has been puzzling to me is the frequent
references to the clarinet being a "closed tube" instrument as opposed to
the other woodwinds which are called "open tube" instruments.

I have tended to compare this to organ pipes which can be open or stopped,
with the stopped pipes having the pitch of an open pipe twice as
long. Somehow I'm wondering if this is perhaps not a good analogy since
the clarinet does not appear to me to be stopped, or closed, in the way
that an organ pipe is stopped.

Presumably if the wave form goes from the full tube length to one third of
the tube length that would account for the instrument overblowing a
twelfth, but what causes it to do this?

Thanks for any info you can provide.

David

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