- #1
Chandasouk
- 165
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During my lecture we were presented with this problem
How much louder is the intensity of sound at a rock concert in comparison with the sound of a whisper, if the two intensity levels (in dB) are 120 and 20, respectively?
What my professor said was that the rock concert was 100 dB greater than the whisper because
120dB-20dB = 100dB and thus 1010 times louder, but I can't get the math to work out properly.
I did
100dB = 10log(I/10^-12)
10 = log(I/10^-12)
10^10 = I/10^-12
I = 0.01
How much louder is the intensity of sound at a rock concert in comparison with the sound of a whisper, if the two intensity levels (in dB) are 120 and 20, respectively?
What my professor said was that the rock concert was 100 dB greater than the whisper because
120dB-20dB = 100dB and thus 1010 times louder, but I can't get the math to work out properly.
I did
100dB = 10log(I/10^-12)
10 = log(I/10^-12)
10^10 = I/10^-12
I = 0.01