Poul-Henning Kamp wrote: > In message <[EMAIL PROTECTED]>, Magnus Danielson wri > tes: > > >> harmonic(2) >> 1a) a tone in a harmonic series >> 2) in physics, a component frequency of a harmonic motion that is an integral >> multiple of the fundamental frequency >> >> overtone >> 1b) Harmonic(2) >> > > Overtone is a musical term and it is not the same as harmonic. > > An harmonic frequency is N times the fundamental, where as an > overtone merely holds a rational relationship to the fundamental > (3/2, 4/3 etc.) > > The reason you can tell the difference between a violin and a > clarinet is that they have different overtone spectra. > > A somewhat arbitrary subset of an intruments overtones are called > "formants" because they are the principal "formers" of the instruments > sound. > > >> synchronous >> 1) happening, existing or arising at precisely the same time >> 2a) going on or operating together at exactly the same rate >> b) recurring together >> 3) involving or indicating synchronism >> > > > >> 4) in physics, having the same period or having the same period and phase >> > > Close, but no cigar. > > If they merely have the same period/frequency, they are "syntonous", > but if the phase is also coincident, they are synchronous. > > >> asynchronous >> not synchronous, proceeding at its own pace; >> > > But just because two signals are asynchronous, doesn't mean they cannot > have the same frequency or phase for a shorter or longer period of time, > it just means that there is no mechanism that makes it so. > > >> The "asynchronous" serial line is actually anisochronous BTW. >> > > No, each transmitter and receiver are anisochronous, but the > communication between them, and by language extension the actual > cable, is asynchronous. > > This is interesting because overtone, when used to describe oscillation modes in crystals, has a slightly different meaning.
When a crystal is made to oscillate on one of it's *overtone* frequencies, the oscillation frequency is not exactly an harmonic of the *fundamental* (or 1st harmonic) oscillation frequency. This term is obviously overloaded and maybe we should not be using it. Didier KO4BB _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
