At 8:35 PM -0800 12/18/01, Carl Meyer wrote: > > a) I take a small tack hammer and tap the bridge lightly but firmly >> on its top. I then give a similar tap with the hammer on the side of >> the bridge. The difference in the sound produced is very markedly >> different in the two cases. It needs no trained ear to tell them >> apart. > >How is it different? Loudness, pitch or timbre? All three, though to talk of the pitch of a noise rather than a sound is complicated. > > b) I take a tuning fork or small tone generator and apply it first >> to the top of the bridge and then to the side of the bridge. The >> sound emitted from the soundboard is the same in both cases. >> > >Is it the same in loudness, pitch and timbre? Yes, so far as I can tell with multiple tests using a simple tuning fork. A more thoroughly convincing test would use an electrical tone generator of some kind. JD
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