Klarinet Archive - Posting 000181.txt from 2010/08

From: "Keith Bowen" <keith.bowen@-----.com>
Subj: Re: [kl] About clarinet acoustics
Date: Mon, 16 Aug 2010 19:28:03 -0400

I'll send you a hard copy!

It is

C = z/2{sqrt[1 +(4/z)(t+hd)(D/d)^2]-1}

using the variables defined below.

I think the half-clarinet idea is fine. The bore is really cylindrical there
and, as you say, the end correction is easy.

Keith

-----Original Message-----
From: Tony Pay [mailto:tony.p@-----.org]
Sent: 16 August 2010 22:57
To: The Klarinet Mailing List
Subject: Re: [kl] About clarinet acoustics

On 16 Aug 2010, at 22:40, Keith Bowen wrote:

> The end effect must be taken into account as it can bemore than the
distance between tone holes. The correction formula is on page 450 of Benade
(Fundamentals of Musical Acoustics) and is also given in my masters'
thesis that I sent you recently.

Actually, that equation didn't make it through the system; I should probably
have told you that before. It just says:

"The acoustic length is longer than the physical length to the last closed
tone hole by the amount
__________________

_ _ _

where z is the distance to the next open tone hole, d is the diameter of
that tone hole, D is the bore diameter at the open tone hole and t is its
depth. h is a factor that may be taken as 0.75 for a completely open hole
and 1.0 for an average padded hole."

:-(

Don't have Benade with me...too heavy on tour.

What do you think of my half-clarinet idea?

Tony
--
Tony Pay
79 Southmoor Rd
Oxford OX2 6RE
tel/fax +44 1865 553339
mobile +44 7790 532980
tony.p@-----.org

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