1.

The faintest sound the human ear can detect at a frequency of I kHz (fair which the ear is most sensitive) corresponds to an intensity of about 10^(-12)W//m^2 (the d threshold of hearing). Determine the pressure amplitude and maximum displacement associated with this sound assuming the density of air = 1.3kg//m^3 and velocity of soimtl in air= 332 m/s

Answer»

`2.94 XX 10^(-5) N//m^(2), 1.1 xx 10^(-11) m`
`2.94 xx 10^(-4) N//m^(2), 1.3 xx 10^(-11)`m
`2.94 xx 10^(-1) N//m^(2), 1.2 xx 10^(-11)`m
`2.94 xx 10^(-3) N//m^(2), 1.5 xx 10^(-11)` m

ANSWER :A


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