Whistle dB reduction (Snubber)
- cyberbadger
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Whistle dB reduction (Snubber)
I am trying to make a whistle snubber that reduces the dB so it doesn't scare people.
I made a 3/8" NPT Coupler like this: Is there a relative relationship between A and volume in dB assuming the same steam pressure??
I made A a little less then 1/8" and it's still a bit louder then I like.
I drew B in the drawing but I assume as long as it's long enough and doesn't create a nozzel it shouldn't matter much.
-CB
I made a 3/8" NPT Coupler like this: Is there a relative relationship between A and volume in dB assuming the same steam pressure??
I made A a little less then 1/8" and it's still a bit louder then I like.
I drew B in the drawing but I assume as long as it's long enough and doesn't create a nozzel it shouldn't matter much.
-CB
- barts
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Re: Whistle dB reduction (Snubber)
There's really no way of figuring this sort of thing w/o characterizing the sound output of the whistle; I'd be inclined to use a small needle valve to adjust things. Be prepared to fiddle when the boiler pressure changes.
Perhaps a better approach is to use a really small whistle valve; that way you can control how much noise the whole thing makes...
- Bart
Perhaps a better approach is to use a really small whistle valve; that way you can control how much noise the whole thing makes...
- Bart
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Bart Smaalders http://smaalders.net/barts Lopez Island, WA
Bart Smaalders http://smaalders.net/barts Lopez Island, WA
- Lopez Mike
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Re: Whistle dB reduction (Snubber)
I have a valve to quiet my whistle down but, as Bart says, the setting has to be changed as the pressure changes. I have a notion that the relationship between sound output and steam pressure might be non-linear. Like twice the pressure yields more than twice the noise.
I suppose a regulator of some sort would do the trick.
I suppose a regulator of some sort would do the trick.
If you think you are too small to make a difference, try sleeping with a mosquito.
Dalai Lama
Dalai Lama
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Re: Whistle dB reduction (Snubber)
The volume of a whistle is related to the length of the flute.
I.e. a whistle with a flute 360 Degrees round would in theory be twice as loud as a whistle with the flute only on the front half.
I.e. a whistle with a flute 360 Degrees round would in theory be twice as loud as a whistle with the flute only on the front half.
I've got the vehicle, just need the boat.
- Lopez Mike
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Re: Whistle dB reduction (Snubber)
I'm not sure how I would come up with a scheme to vary the length of the flutes as the pressure changes.
Now that I think more about my wonderful regulator idea I see a major drawback. One more lump of metal to warm up before the whistle stops showering me with scalding water. Oh, well
Now that I think more about my wonderful regulator idea I see a major drawback. One more lump of metal to warm up before the whistle stops showering me with scalding water. Oh, well
If you think you are too small to make a difference, try sleeping with a mosquito.
Dalai Lama
Dalai Lama
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Re: Whistle dB reduction (Snubber)
Piece-wise approximation: use several identical whistles and bring more on-line.Lopez Mike wrote:I'm not sure how I would come up with a scheme to vary the length of the flutes as the pressure changes.
Put the whistle valve up at the whistle to help w/ the shower problem.... any condensate will flow back down into the boiler.
- Bart
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Bart Smaalders http://smaalders.net/barts Lopez Island, WA
Bart Smaalders http://smaalders.net/barts Lopez Island, WA
- Lopez Mike
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Re: Whistle dB reduction (Snubber)
Lovely. I'm already under the stink eye for too much tootling and you want me to build a Calliope? Right.
And it would be sure to be badly out of tune.
And it would be sure to be badly out of tune.
If you think you are too small to make a difference, try sleeping with a mosquito.
Dalai Lama
Dalai Lama
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Re: Whistle dB reduction (Snubber)
Mike.
Take a look on page 15 November/December 1962 "Steamboats and Modern Steam Launches". There's an example of what amounts to a slide whistle. You might even be able to play Yankey Doodle on it?
Dave
Take a look on page 15 November/December 1962 "Steamboats and Modern Steam Launches". There's an example of what amounts to a slide whistle. You might even be able to play Yankey Doodle on it?
Dave
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Re: Whistle dB reduction (Snubber)
You guys are hell bent on making me into a bachelor steamer.
If you think you are too small to make a difference, try sleeping with a mosquito.
Dalai Lama
Dalai Lama