I went to the S.R site and read what they wrote on these. Bell labs stuff...
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I was thinking of the design of the instrument tuba...
You blow in the horn and out comes a deep sound...
Have anyone of you tried to place a tuba in front of a subwoofer and listen into the mouth piece?
I'm sure you would hear zip nada zilch...
The question would of course be... why?

Now, play back the tuba sound with the sub and listen again...
Then... remove the mouthpiece and listen once more...
Why would there be a difference? And would there be a difference in the room as well?
Or how about the romantic dinner test then...
Should you try the deep seductive voice close to her face with the glass full or close to empty...

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okay, enough fun then..
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To vibrate something, you have to set it into vibration... right?
What happens if an object has a vibrational node then and is hit by sound... it would "eat" some of the energy, and dispell another... Right? Maybe not much, but maybe some if one could get it right...

I does sound incredible this stuff one can read at the Syn Res site... but I'm not gonna blow this off for kicks just because...
The sound a trumpet can generate is immense... compared to what the player puts into the mouthpiece...
Transforming basically a very gentle fart into a real cracker!!!
This is a vid from youtube on resonating metal...
http://www.youtube.com/watch?v=6i0tQckoKUo&feature=relatedAt 31 second into the clip the left tubiste tilts his tuba... Now I wanna make a note here...
You can hear the entire sound change as he does it... aa on all 4 tubas... but they ain't moving theirs!!!
At 1 minute and 9 second he does it again... again the entire sound change!!! And again at 1 minute and 19 seconds...
What is he doing? And why does it work?
Here's what I think:
- Tilting the tuba upright and opening a valve he's altering the standing waves in the room they are playing'
'coz the tuba now acts as a tuned device that he actually dampens a special note with, on all the tubas...
"Combfiltering" maybe you could call it that?

But 3K ... ok, I'd have to hear it before believing, that's all I'm saying!!
'Coz even after KNOWING that a large brass instrument can change the room acoustics...
getting a small metal bowl to do the same...

Imperial