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

Question

Quizplus · Accepted Answer

The intensity level in decibels (dB) can be calculated using the formula $10 \log_{10}(\frac{I}{I_0})$, where $I$ is the intensity of the sound and $I_0$ is the reference intensity. Tripling the intensity ($I = 3I_0$) results in an increase of $10 \log_{10}(3)$ dB, which is approximately 4.8 dB.

By How Many Decibels Does the Intensity Level of a Sound