Distinguished SOTW Member
selmer 26 nino, 22 curved sop, super alto, King Super 20 and Martin tenors, Stowasser tartogatos
It's been done. Backus took the radiated sound and inverted it, then added the inverted signal to the original signal canceling it completely. What was left was only the sound of the body vibrations, which were barely audible in a completely quite room and completely masked by the normal signal. Quantitative tests have been done showing the body sound to be -40 dB, 10000 times weaker than that of the air column.Yeah, good stuff, and I did take physics in h.s. and college - but I'm not normal. When they say wall vibrations contribute only a "small fraction of the sound" they don't say inaudible. I don't know how one would go about measuring the contributions to the sound of the actual sympathetic vibrations of the instrument itself, other than by totally "deadening" an instrument with padding or lead to keep it from starting sympathetic vibrations and then testing that against an unrestrained instrument, then acoustically separating out the sound, however slight, of the instrument vibrations alone, and seeing if that's detectable to a "normal" human ear. There's a Phd thesis in there somewhere for somebody. Or maybe it's already been done?
Further Smith did a test with trombone bells, which do radiate sound rather strongly. Ten top pro trombonists played a horn fitted with different bells in a double-blind test, and none could tell them apart, even though certain harmonics had a 2 dB difference when measured at the players' ear position. That should have been perceptible, but it was not to the players when they couldn't identify the bells by sight or weight.
Enjoy your vibrations, but don't credit them unnecessarily....