ho_sound - Sound General Sound propagates as a longitudinal...

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Sound General: Sound propagates as a longitudinal traveling wave - everything we’ve learned about traveling waves still applies. While you can write the equation for a traveling sound wave in terms of the longitudinal displacement of particles in the media through which the wave is propagating, It turns out to be better for some purposes to write it in terms of the variations in pressure (from the nominal, or undisturbed pressure) δp ( x, t ) = P 0 cos( kx - ωt ) P 0 = 0 v 2 x A where A is the displacement amplitude of the particles in the medium. Since power and intensity are proportional to the square of the maxi- mum displacement, A , they are also proportional (by a different con- stant) to the square of the pressure amplitude P 0 . Sound and Resonance: When a 1-dimensional medium has like boundary conditions, (node,node) or (antinode,antinode), the fundamental frequency is given by f 1 = v x 2 L and all harmonics are present.
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This note was uploaded on 11/12/2010 for the course PHYSICS 1B 318007241 taught by Professor Corbin during the Spring '10 term at UCLA.

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ho_sound - Sound General Sound propagates as a longitudinal...

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