Then light, which is partcles? that come in waves is vibration. and electricity?. And essentially it's the kinetic energy of molecules vibrating that keeps the air pressure. I guess every form of energy has a basic vibration as a component. Sorry Keith On Wed, May 13, 2009 at 5:41 PM, Jim Moy <jim at moypiano.com> wrote: > On Wed, May 13, 2009 at 11:15 AM, Don Mannino <DMannino at kawaius.com> > wrote: > > I'm not clear which person wrote that sound is not a vibration, but that > is incorrect. > > Always love a conversation where people realize the words they've been > using for ages have meant different things to the participants the > whole time :-) > > Don points out the term "vibration" means oscillation about a point of > equilibrium, and that meets with my intuitive understanding of sound. > But isn't the vibration of a string very different than the > compression and rarefaction cycles of air molecules? Then are we back > to the "transducer" discussion? > > Also (based on echoes of engineering classes long forgotten) the > vibration of a string *is* a form of wave -- a "standing" wave caused > by the reflections off the impedance mismatch of the terminated > string. Had you waited long enough after casting the rock into said > pond, or if the pond was relatively small, you would see the wave > reflecting off its edges and combining with more recent ones to > produce the vibration analagous to that of a piano string. > > Jim > > -- > Jim Moy > Moy Piano Service, LLC > http://www.moypiano.com > 970-292-6808 > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/caut.php/attachments/20090513/aacbdd81/attachment-0001.htm>
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