Klarinet Archive - Posting 000201.txt from 2010/08

From: "Keith Bowen" <keith.bowen@-----.com>
Subj: Re: [kl] About clarinet acoustics
Date: Tue, 17 Aug 2010 06:17:42 -0400

Curves in the bore like the neck, flatten the pitch - it's been well studied
for brass instruments. Hard to quantify, though!

Before doing more measurements it's sensible to see what has already been
done! Please see my long email about Vanderveen's book. The half-clarinet
measurement would be interesting, though. Measure the bore diameter as well
to do the end correction.

Oh and you need to measure temperature inside the bore. And until the
clarinet warms up, there will be a big temperature gradient inside it.

Keith =

-----Original Message-----
From: Nitai Levi [mailto:clarnibass@-----.com] =

Sent: 17 August 2010 10:30
To: klarinet@-----.com
Subject: Re: [kl] About clarinet acoustics

>> It means I've been right to be dividing the 'effective clarinet closed
tube' =

>>(the =

>>
>> distance between a little bit into the mouthpiece and slightly beyond the
first =

>>
>> open tonehole) to estimate where bore modifications most affect the =

>twelfths:-)

>> I don't have a thermometer -- and this IS Siena, therefore temperature is

>> important -- so the half-clarinet will have to wait.

>> Tony

How important is not to have curves in the bore, like a bass clarinet neck?
If I =

understand, bows are a bit similar to slightly enlaging the bore at that
point. =

At least on the saxophone bow, not sure about bass clarinet neck. Because
other =

than that, my bass clarinet is a straight cylidnrical bore and I can check
both =

just the top joint (middle C fingering) or both joints without bell (low Db =

fingering) so it is just a closed pipe with no "last tone hole". I have a =

thermometer, even a funny one that looks like a pig :)=A0 I can also measur=
e =

anything with half a soprano clarinet. I just need to know what to measure
:-)

Nitai

=

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