Klarinet Archive - Posting 000704.txt from 2000/08

From: "Lacy, Edwin" <el2@-----.edu>
Subj: RE: [kl] Plastic vs. Wood
Date: Wed, 23 Aug 2000 14:09:48 -0400

<<<I've noticed that the wall of the chimney (the tube that rises up from a
ringed hole) is noticeably thinner on the G hole (right hand) of some
clarinets than others. More important, the chimney wall is thinner on the G
hole of such clarinets than it is on all the other ringed holes on the _same
instrument_. This could be a matter of manufacturing convenience, but if
the wall thickness makes an acoustical difference, then doesn't this answer
the question about materials and thicknesses thereof having an acoustical
affect?>>>

I note that you requested a reply from M. Francois Kloc, and perhaps he will
have something to add to the discussion. However, I thought I might mention
that the height of the chimney is only one of the factors in the acoustical
functioning of a tone hole. Others include the diameter of the hole and its
placement relative to the longitudinal axis of the instrument. The hole
could be further affected by undercutting, the smoothness of the cut, etc.
So, tone holes with a rather wide variety of chimney heights could function
similarly with regard to pitch, tone production, etc., depending on the
interrelationship of all these factors.

Ed Lacy
EL2@-----.edu

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