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

Question

Quizplus · Accepted Answer

The decibel scale is logarithmic, meaning each 10-decibel increase represents a tenfold increase in intensity. Therefore, a 40-decibel sound is 100 times as intense as a 20-decibel sound.

A Sound of 40 Decibels Is