There are 2 main definitions of bel in English:

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bel 1

Line breaks: bel

noun

A unit used in the comparison of power levels in electrical communication or of intensities of sound, corresponding to an intensity ratio of 10 to 1. See also decibel.
Example sentences
  • The drives are rated at under 2.5 bels of acoustic power, the same level of acoustic noise produced by Seagate's PC drives.
  • Select a heat pump with an outdoor sound rating of 7.6 bels or lower.
  • The present invention is a computer chassis assembly that can adequately cool an electronic system which generates 450 watts of heat, without emitting cooling fan noise above 5 bels of sound power.

Origin

1920s: from the name of A. G. Bell (see Bell, Alexander Graham).

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There are 2 main definitions of bel in English:

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Bel 2 Line breaks: Bel
Another name for Baal.

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Pronunciation: fɔːˈtɪsɪməʊ
adverb
(especially as a direction) very loud or loudly