PHYSICS and math OF SOUND

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Presentation transcript:

PHYSICS and math OF SOUND

Stationary sound source

DOPPLER EFFECT http://video.google.com/videosearch?q=doppler+effect&hl=en&emb=0&aq=f# Doppler Effect = change in pitch or frequency due to moving sound source or receiver

Super Sonic & Breaking the Sound Barrier Sonic boom is a noise similar to thunder caused by an object moving at supersonic speeds, faster than sound, about 750 mph.

Any elastic material can transmit sound. Echoes are reflections from smooth, hard surfaces. Echo free rooms sound “dead.”

Calculating the speed of a wave (remember  speed is distance over time) V = l f Hz m/s m 1/s

V = l f A wave has a frequency of 4.05 hertz and a wavelength of 4.00m. What is the wave’s speed? f =4.05Hz l = 4.00m V = l f v = (4.00m)(4.05Hz) v = 16.2 m/s

V = l f = V f f= V l