Before thinking this question, let's think another one. Since the 1st mode
of the vibration source is way higher than the sound frequency, how can a
cl./sax pick its resonance frequency if this frequency is not provided by
the source, ie., reed?
I don't know the answer, but I suspect that there exist sub-modes, whose
frequencies are lower than the 1st mode and they would happen in a non-linear
vibration system. Reed is certainly a non-linear system. The instrument might
pick up one of the sub-modes as its resonance.
It's just my guessing.
CHCheng
※ 引述《hschen (H-Y)》之銘言：
: ※ 引述《jay (傑哥)》之銘言：
: : According to last post, the vibration mode of the tip is
: : left up when right down, that seems not the 1st mode.
: : Well, it's not the point, I am just curious how they know that.
: : I thought the reed vibrate uniformly, never thought about that it can vibrate
: : that way.
: : Thank you for the references, this can be a good topic to research.
: A Jay,
: I agree with you completely. I don't know how to explain that.
: The description of the vibration of the reeds comes from a series
: of experiments conducted by James Pyne of the Ohio State Univ.
: I am not able to give a theoretical explanation of those experiments.
: Perhaps I should email him and ask him. Actually Tony Pay
: may know a little bit about this because he is also a quite
: knowlegable mathematician.
: Hsuan-Yi Chen
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