Multiple choice general knowledge history

The unit of sound is -

  1. (A) Dyne

  2. (B) Joule

  3. (C) Knot

  4. (D) Decibel
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Decibel (dB) is the standard unit used to measure the intensity or loudness of sound. It represents a logarithmic ratio of sound pressure or power. Dyne is a unit of force, Joule is a unit of energy, and Knot is a unit of speed used in navigation - none are related to sound measurement.

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