If the intensity of sound changes (increases) by a factor of 100, the decibel level changes by a factor of
A) 1.
B) 10.
C) log 100.
D) 20.
E) 100.

Name: If the intensity of sound changes (increases) by a factor of 100, the decibel level changes by a factor of A) 1. B) 10. C) log 100. D) 20. E) 100.
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The decibel level change is calculated using the formula 10 * log10(I2/I1), where I2/I1 is the intensity ratio. For a 100 times increase, log10(100) = 2, so the change is 10 * 2 = 20 dB.

If the Intensity of Sound Changes (Increases) by a Factor