Klarinet Archive - Posting 000141.txt from 1999/12

From: "Michael Bryant" <michael@-----.uk>
Subj: Re: [kl] cylinders & cones
Date: Sun, 5 Dec 1999 04:21:32 -0500

My answer has nothing to do with PVC.
However, a book of simple designs including a 5-key clarinet
(and also flute, oboe and bassoon) intended for school use
was published in 1973.

Peter Tomlin: Woodwind for Schools; (70 pages),
The Dryad Press, Northgates, Leicester, England

US address:
The Dryad Press:1421 West 240th Street Habor City California 90710

The book demonstrates the methods used by the author
and gives all the essential dimensions for making and tuning
classical period instruments out of wood on a lathe in a school workshop.
Mike Bryant

-----Original Message-----
From: Frank Galiani <fgaliani@-----.net>
Date: 04 December 1999 21:51
Subject: Re: [kl] cylinders & cones

>Dee, You said, "I even saw an exercise in a book that shows you how to
take a
>piece of PVC plumbing pipe (and this has a constant diameter) and make a
>primitive clarinet."
> I'd love to see a copy of that or get a reference to the book if at all
>possible. Thanks, Frank P. Galiani
>
>Dee D. Hays wrote:
>
>> ----- Original Message -----
>> From: Neil Leupold <leupold_1@-----.com>
>> To: <klarinet@-----.org>
>> Sent: Saturday, December 04, 1999 1:13 PM
>> Subject: Re: [kl] cylinders & cones
>>
>> >
>> > Given this statement, I'm looking for an admission that the
>> > conditions under which an instrument is considered cylindrical
>> > vs. conical do not adhere to the literal definitions of these
>> > geometric shapes. I've not studied clarinet acoustics to any
>> > degree, so this is all curiosity. Definitionally, does a cyl-
>> > inder not retain the same diameter across its entire length
>> > (I'll confine this definition to circular cylinders)? If this
>> > is true, then I assume that some authoritative body decided at
>> > some point in time to instate an arbitrary standard of flare
>> > percentage to a "cyliner", such that it need not adhere per-
>> > fectly to the defined properties of a cylinder, but could
>> > still be referred to as one. Is that right? If not, then
>> > what event or concept explains the classification of a clar-
>> > inet as a cylinder when, the bell notwithstanding, it clearly
>> > is not? Equally as important, is there a codified number to
>> > indicate the exact flare percentage, past which a pipe 'gradu-
>> > ates' (pun intended) from a "cylinder" to a "cone"?
>>
>> Well I don't know if this has been codified or not. However you can take
>> some of the older clarinets (especially old Alberts) and put the upper
joint
>> on upside down as the diameter in the upper joint doesn't vary to any
>> significant degree.
>>
>> Of course the strict mathematical definition is that a cylinder is the
same
>> diameter throughout its length (no ifs, ands, or buts). But
acoustically,
>> some variance can occur before the sound waves "switch over" from the
>> characteristics of the closed cylinder to the closed cone. By taking
>> advantage of this, clarinet makers can provide us with instruments that
have
>> better tuning and pleasanter tone quality than could be achieved by
sticking
>> to a strict cylinder.
>>
>> For musicians and instrument designers, the important element isn't
whether
>> its a true cylinder but what does it act like acoustically.
>>
>> I even saw an exercise in a book that shows you how to take a piece of
PVC
>> plumbing pipe (and this has a constant diameter) and make a primitive
>> clarinet.
>>
>> Dee Hays
>> Canton, SD
>>
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>
>
>
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