Help identifying tiny mystery "whistle"

avanutria · Post by **avanutria** » Sun Jan 13, 2002 6:55 pm

<center><img src="http://www.rit.edu/~eeg6662/flute/myste ... "></center>

I got this from my high school physics teacher - I found it on his 'shelf of interesting stuff' and he let me keep it. It operates similarly to a slide whistle. It has two shafts and is very small, ranging from 2.5 (closed) to 4 inches (extended). It's too high pitched for my tuning program to register.

Theories?

--Beth

Tony · Post by **Tony** » Sun Jan 13, 2002 7:12 pm

Was the sound audible ??
I'm thinking it's used to demonstrate high frequencies above (or at the threshold of) human hearing... perhaps in an acoustical science lab ?
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No, Wait!!! I think I've seen one of those things in the movie "Men In Black"

<font size=-1>[ This Message was edited by: Tony on 2002-01-13 20:14 ]</font>

jim stone · Post by **jim stone** » Sun Jan 13, 2002 7:14 pm

Dog whistle.

Loren · Post by **Loren** » Sun Jan 13, 2002 7:17 pm

Crystal People signal device.

avanutria · Post by **avanutria** » Sun Jan 13, 2002 7:34 pm

It is audible at all levels.

I thought maybe it was a dog whistle but why would it be adjustable with two shafts?

Tony · Post by **Tony** » Sun Jan 13, 2002 7:46 pm

The 2 pitched whistle was commonly used by the Royal Canine Navy.
"All ashore who's going ashore...."
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On a more serious note... possibly used in a robotics lab where high pitched sounds are used to signal motor controlled devices.

<font size=-1>[ This Message was edited by: Tony on 2002-01-13 20:50 ]</font>

brownja · Post by **brownja** » Sun Jan 13, 2002 8:31 pm

If a physics teacher had it, it might have been used to demonstrate beat frequencies.
jb

Grannymouse · Post by **Grannymouse** » Sun Jan 13, 2002 9:32 pm

Thomas Hastay will know what this is.
I bought a couple of large wooden "whistles" on Ebay from 2 different sellers. Thot they would be interesting in my collection......turns out they were organ pipes!

ErikT · Post by **ErikT** » Mon Jan 14, 2002 1:52 am

I'm with brownj.

brewerpaul · Post by **brewerpaul** » Mon Jan 14, 2002 6:57 am

I agree with the beat theory.

Martin Milner · Post by **Martin Milner** » Mon Jan 14, 2002 7:22 am

I think Brownja gets the prize.

Try setting one of the slides about mid-way and then blow both while pulling & pushing the second slide along it's whole range. You should get interference & some wierd effects.

This would also demonstrate that sound travels in waves, not particles.

Bobj · Post by **Bobj** » Mon Jan 14, 2002 2:37 pm

This is apparently two modified phone-plug electrical connectors on a banana plug body. Banana plug connectors like this used to be used for stereo speakers. The phone plug portions were used for headphones. Mixed and matched with other electrical connector parts.

mark02 · Post by **mark02** » Mon Jan 14, 2002 4:38 pm

Could this be the elusive Davey Spillane whistle everyone has been waiting for?

After all, he has said for awhile that his whistles are unlike Overton, Goldie, or Hardy whistles.

This whistle is clearly unlike any of those.

Could it be???

All the best,

Mark "my vote is for dog whistle" Sackett

totst · Post by **totst** » Mon Jan 14, 2002 6:50 pm

Well, if we got the "telescoping' whistle, we could call this the "binocular" whistle. ..I know, I know...just couldn't resist..

Tots

Cody · Post by **Cody** » Mon Jan 14, 2002 7:17 pm

On 2002-01-14 08:22, Martin Milner wrote:

This would also demonstrate that sound travels in waves, not particles.

Uh Oh! Now we'll need an offtopic thread discussing Quantum Theory.