# Bel meaning

bĕl
(physics) A unit used for measuring sound intensity, equal to 10 decibels: abbrev. B.
noun
Ten decibels.
noun
In physics, a measure of comparative power ratio, or relative loudness. In other words, a unit of power ratio. The number of bels is the decimal logarithm of the power ratio, which is expressed mathematically as follows: B = log 10 (P 1 /P 2 ) where B = Bel, and P 1 and P 2 are power levels. One bel is equal to 10 decibels. The bel is named for Alexander Graham Bell, inventor of the telephone, among other things. See Bell, Alexander Graham; decibel; logarithm; and power.
A unit of measurement equal to ten decibels.
A measure of relative power, defined as log10(P 1/P 2), where P1 and P2 are the measured and reference power respectively. See also decibel.
noun
(place) Belgium.
abbreviation
(bab. myth., person, proper) The god of heaven and earth.
noun

## Origin of bel

• After Alexander Graham Bell

### From American Heritage Dictionary of the English Language, 5th Edition

• Named after Alexander G. Bell