Dictionary Home » Dictionary Definitions » decibel

decibel

The definition of a decibel is a degree of loudness, or is a unit used to measure how powerful or loud a sound or signal is using a logarithmic formula.

(noun)

When you turn your iPod up as loud as it can possibly go, this is an example of when you listen to your music at the highest decibel.

See decibel in Webster's New World College Dictionary

noun

Acoustics a numerical expression of the relative loudness of a sound: the difference in decibels between two sounds is ten times the common logarithm of the ratio of their power levels
Electronics, Radio a numerical expression of the relative differences in power levels of electrical signals equal to ten times the common logarithm of the ratio of the two signal powers Sometimes an absolute reference is used in the power ratio (10 watt per sq cm in acoustics, one milliwatt in electronics and radio)

Origin: deci- + bel

See decibel in American Heritage Dictionary 4

noun Abbr. dB

A unit used to express relative difference in power or intensity, usually between two acoustic or electric signals, equal to ten times the common logarithm of the ratio of the two levels.

Origin:

Origin: deci-

Origin: + bel

Learn more about decibel

decibel computer definition

decibel Culture

decibel medical definition

decibel science

decibel in a sentence

link/cite print suggestion box