Year+13+-+Standing+Waves

__**Standing Waves: Harmonics and Pitch **__

There's music in the sighing of a reed; There's music in the gushing of a rill; There's music in all things, if men had ears: Their earth is but an echo of the spheres. ~Lord Byron

A song is anything that can walk by itself. ~ Bob Dylan

And Bob, as always, is right in his own way: Though sound will propagate without legs, it cannot travel in a vacuum. Because "in space no one can hear you scream" (Alien). The reason is what we hear, sounds, are essentially vibrations and variance in the air pressure around us, detected by our ears.



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Beats Applet: You can change the frequencies and see how they affect the beat pattern.

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Derivation of Young's Formula: