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The '''decibel''' is the unit of sound pressure used to measure [[noise]]. Decibel means 1/10 of a Bell, after [[Alexander Graham Bell]] Because decibels are such a small measure, they are computed logarithmically and cannot be added arithmetically. An increase of ten dB is perceived by human ears as a doubling of noise.
The '''decibel''' is the unit of sound pressure used to measure [[noise]]. Decibel means 1/10 of a Bell, after [[Alexander Graham Bell]] Because decibels are such a small measure, they are computed logarithmically and cannot be added arithmetically. An increase of ten dB is perceived by human ears as a doubling of noise.
[[category:measurements]][[category:physics]]