10 decibel (dB) increase in sound level will increase the loudness of sound by HomeNoise Pollution MCQs10 decibel (dB) increase in sound level will increase the loudness of sound by Q. 10 decibel (dB) increase in sound level will increase the loudness of sound by A. 5 times B. 2 times C. 10 times D. none of the above Answer: 10 times