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whistles with a washer on the end

Jack Campin 27 Aug 09 - 04:34 AM
GUEST,Gerry 27 Aug 09 - 08:17 PM
s&r 28 Aug 09 - 02:53 AM
Darowyn 28 Aug 09 - 04:33 AM
Jack Campin 28 Aug 09 - 04:42 AM
GUEST,HughM 28 Aug 09 - 08:08 AM
s&r 28 Aug 09 - 12:06 PM
open mike 28 Aug 09 - 12:24 PM
Jack Campin 28 Aug 09 - 12:48 PM
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Subject: whistles with a washer on the end
From: Jack Campin
Date: 27 Aug 09 - 04:34 AM

The usual design of an Andean quena has a narrowing on the distal end. This is common in whistles from all over the place: I have one Transylvanian elder whistle where the far end has been cut at a node, and another where a small wooden washer has been inserted to narrow the bore. Bamboo whistles in some traditions are cut with the bottom end at a node to provide a narrowing.

The point of this is to improve response and correct intonation in the high register. It does the same thing as the reverse conical bore you get on recorders and better quality whistles. It also makes cross-fingerings more effective (not used a lot in British Isles whistle technique, but common in Hungarian and Romanian style).

But I've never seen it done on a metal or plastic whistle. You'd think it would be easy enough - thread the end and screw in a stopper, or for cheaper models just solder or glue a washer on the end.

Doing this to an existing whistle wouldn't work (the spacing of the holes would have to change) but it might be worth somebody's while to experiment.


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Subject: RE: whistles with a washer on the end
From: GUEST,Gerry
Date: 27 Aug 09 - 08:17 PM

I have nothing useful to add to this thread, but I just thought I would share with everyone my experience of reading the subject line to the tune of "walking in a winter wonderland." I like the way the doubleyous match up - well, the first two, anyway.


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Subject: RE: whistles with a washer on the end
From: s&r
Date: 28 Aug 09 - 02:53 AM

I've missed something here Jack. Surely as soon as you cut a tube you form a pressure node at that point?

Stu


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Subject: RE: whistles with a washer on the end
From: Darowyn
Date: 28 Aug 09 - 04:33 AM

An open end creates a point at which the pressure in the pipe must be equal to atmospheric, of course, but putting a restrictor will allow some waveforms- shorter ones- to develop which have a high pressure node at the previously open end.
Sometimes the terms mode and node are used to discriminate between the low and high pressure regions of a standing wave.
Cheers
Dave


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Subject: RE: whistles with a washer on the end
From: Jack Campin
Date: 28 Aug 09 - 04:42 AM

You may be misinterpreting what I said - the washer is inserted into the far end of the tube, narrowing its bore. (I can't get an ASCII picture to work). In the examples I've seen, the bore is reduced to about half.


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Subject: RE: whistles with a washer on the end
From: GUEST,HughM
Date: 28 Aug 09 - 08:08 AM

I don't think Jack means a node of the standing wave, but a natural lump such as those on a stick of bamboo.


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Subject: RE: whistles with a washer on the end
From: s&r
Date: 28 Aug 09 - 12:06 PM

Thanks Hugh - makes sense now

Stu


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Subject: RE: whistles with a washer on the end
From: open mike
Date: 28 Aug 09 - 12:24 PM

perhaps more of a bushing than a washer?


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Subject: RE: whistles with a washer on the end
From: Jack Campin
Date: 28 Aug 09 - 12:48 PM

Measuring my Transylvanian low G elder whistle:

Overall length 398mm
Length of windway 18mm
Bore at top end 14mm
Bore at bottom end 13mm
Diameter of hole in washer 7mm
Thickness of washer about 4mm
Fingerhole centres measured from the bottom end 37mm, 65mm, 94mm, 131mm, 163mm, 192mm
Fingerholes all about 7.5mm long, 6mm wide


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