Question

Decibel is a standard abbreviation used for the quantitative expression of

• A. the density of bacteria in a medium
• B. sound
• C. the dominant bacillus in a culture
• D. a certain pesticide

Answer 1

The correct option is B

sound

The decibel (abbreviated dB) is the unit used to measure the intensity of a sound. On the decibel scale, the smallest audible sound (near total silence) is 0 dB. A sound 10 times more powerful is 10 dB. A sound 100 times more powerful than near total silence is 20 dB.