A sound of 40 decibels is
A)twice as intense as a sound of 20 decibels.
B)four times as intense as a sound of 20 decibels.
C)10 times as intense as a sound of 20 decibels.
D)100 times as intense as a sound of 20 decibels.
E)1000 times as intense as a sound of 20 decibels.

Question

Quizplus · Accepted Answer

The decibel scale is logarithmic, meaning a 10-decibel increase represents a sound that is 10 times more intense. Therefore, a 20-decibel increase (from 20 to 40 decibels) indicates a sound that is 10 times 10, or 100 times more intense.

A Sound of 40 Decibels Is