The faintest sound the human ear can detect at a frequency of 1 kHz (for which the ear is most sensitive) corresponds to an intensity of about 10 –12 W/m 2 (the so called threshold of hearing). Determine the pressure amplitude and maximum displacement associated with this sound assuming the density of air = 1.3 kg/m 3 and velocity of sound in air = 332 m/s.
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1.1 × 10 –11 m
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