The faintest sound that can be heard has a pressure amplitude of about 4×10−5 N/m2 and the loudest that can be heard without pain has a pressure amplitude of about 2.8 N/m2. Determine the intensity of the faintest sound (both in W/m2 and in dB).[Assume, air density is 1.3 kg/m3 and velocity of sound is 330 m/s and take log101.86=0.269]

The faintest sound that can be heard has a pressure amplitude of about

1.	The faintest sound that can be heard has a pressure amplitude of about 4×10−5 N/m2 and the loudest that can be heard without pain has a pressure amplitude of about 2.8 N/m2. Determine the intensity of the faintest sound (both in W/m2 and in dB).[Assume, air density is 1.3 kg/m3 and velocity of sound is 330 m/s and take log101.86=0.269]
Answer» The faintest sound that can be heard has a pressure amplitude of about $4 \times 10^{- 5} {N/m}^{2}$ and the loudest that can be heard without pain has a pressure amplitude of about $2.8 {N/m}^{2}$ . Determine the intensity of the faintest sound (both in ${W/m}^{2}$ and in $dB$ ). [Assume, air density is $1.3 {kg/m}^{3}$ and velocity of sound is $330 m/s$ and take ${log}_{10} 1.86 = 0.269$ ]

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