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In Reply to: RE: The scientific literature I have read is all about trombones, and here might be the reason: posted by John Marks on December 14, 2014 at 13:46:53
>The scientific literature I have read is all about trombones:
>"Because nonlinear propagation effects are cumulative, the resulting
>distortion of the signal can be spectacular, leading to the formation of
>shock waves in the instrument, especially when the tube [read: "slide"] is
>at its maximum extension (figure 2)."
The trombone's waveform is also highly asymmetrical; see fig.1 at the page
linked below, which is Art Baron's 'bone captured at the sessions for
Jerome Harris's "Rendezvous" Stereophile CD.
John Atkinson
Editor, Stereophile
Follow Ups:
Thanks, John...
But, the thing that I have read before in the literature, but which has never been explained, is:
WHY is the trombone's waveform's asymetrical-ness baised toward NEGATIVE?
Tympani thwacks having a negative pressure front makes perfect sense... . Compress the air inside the kettle, rarify the air above the skin.
But trombones don't work like that. I have seen papers about the inside of the mouthpiece, etc., but, frankly, they were observational and never seemed to explain the why of it.
NB, it could be that trumpet mouthpieces work the same, but that the path length inside the trumpet is not long enough to get the mutual reinforcement past the critical point.
Oh well, don't sweat it.
It's not as though we were talking about violins or something really important like that!
John
Pass the Ear Plugs, Please....
A box of them is at each entrance to the Stage at Davies Hall.
Not the Golf-Tee shape, but a dense cylinder of expanding Foam, they work well for Self-Defense.
I tried Custom, but these block more sound.
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