By what amount does the intensity level increase when you triple the intensity of a source of sound?
A) 9.5 dB
B) 4.8 dB
C) 6.0 dB
D) 3.0 dB
E) 12 dB

Question

Quizplus · Accepted Answer

The intensity level in decibels is calculated using the formula: $ \Delta L = 10 \log_{10}(\frac{I_2}{I_1}) $. Tripling the intensity means $ \frac{I_2}{I_1} = 3 $. Thus, $ \Delta L = 10 \log_{10}(3) \approx 4.8 $ dB.

By What Amount Does the Intensity Level Increase When You