PHYS 121 Chapter Notes - Chapter 21: Fourier Analysis, Analog Signal, Sound Intensity
10 Dec 2017
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White noise is a mixture of a variety of frequencies of sound. We describe the sound of the surf, rustling leaves, or bubbling water in a brook as white noise. Pitch - the highness or lowness of a tone, as on a musical scale, which is principally. Rapid vibrations of the sound source (high frequency) produce sound of a high pitch, governed by frequency whereas slow vibration (low frequency) produce a low pitch. Different musical tones are obtained by changing the frequency of the vibrating sound source. This is usually done by altering the size, the tightness, or the mass of the vibrating object. Intensity - the power per square meter carried by a sound wave, often measured in. The human ear responds to intensities that cover the enormous range from 10^-12 w/m^2 (the threshold of hearing) to more than 1 w/m^2 (the threshold of pain) 0 bel - barely audible 10^-12 w. m^2.
