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What is the intensity level of a sound with an intensity of 0.000127 W/m2? 65 dB 72 dB 81 dB 120 dB
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2 votes
What is the intensity level of a sound with an intensity of 0.000127 W/m2?

65 dB

72 dB

81 dB

120 dB

User Otejiri
by
5.2k points

1 Answer

6 votes
dB = 10 log (I/Io)
Where, Io is the reference intensity which is the minimum intensity that human can hear.
That is; Io = 10^-12
Therefore;
dB = 10 log (0.000127/10^-12) =80.79
= 81 dB
Therefore; the correct answer is 81 dB
User Pedro Delfino
by
5.7k points
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