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decibels

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decibels

Decibel

The decibel(abbreviated dB) is the unit used to measure the intensityof a sound.

On the decibel scale, the smallest audible sound (near total silence)is 0 dB. A sound 10 times more poerful is 10 dB. A sound 100 timesmore poerful than near total silence is !0 dB. A sound 1,000 times

more poerful than near total silence is "0 dB. #ere are some commonsounds and their decibel ratin$s%

&ear total silence ' 0 dB A hisper ' 1 dB &ormal conversation ' 0 dB

A lanmoer ' *0 dB A car horn ' 110 dB A roc+ concert or a et en$ine ' 1!0 dB A $unshot or -recrac+er ' 10 dB

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All of the previous ratin$s are ta+enhile standin$ near the sound.

/istance aects theintensity of sound '' if oneis far aay, the poer is

$reatly diminished.

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Any sound above dB can causehearin$ loss, and the loss is relatedboth to the poer of the sound as ell

as the len$th of e2posure. 3ou +nothat you are listenin$ to an 'dB soundif you have to raise your voice to beheard by somebody else. 4i$ht hours of*0'dB sound can cause dama$e to yourears5 any e2posure to 10'dB sound

causes immediate dama$e (and causesactual ain .

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