Nov19-08, 07:14 PM
1. The problem statement, all variables and given/known data
A. What is the sound intensity of a whisper at a distance of 3.5 m, in W/m2?
I know that a whisper is approximately 20 dB and P = 10-10 W/m2.
B. What is the corresponding sound intensity level in dB?
2. Relevant equations
I = Power/[(4pi)(3.5m)2)
dB = 10 log (I/Io).
3. The attempt at a solution
I = 6.50*10-13
dB = -1.87 (I used 10-12 W/m2 for Io)
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