Multiple choice

Decibel is

  1. a musical instrument

  2. a measure of sound level

  3. a musical noise

  4. the wavelength of noise

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The decibel is a logarithmic unit used to express the ratio of two values of a physical quantity, typically power or intensity. In the context of acoustics, it is the standard unit used to measure sound pressure levels. It quantifies how loud a sound is perceived by the human ear.