7/24/2019 DECIBEL - QUESTIONS - Copy.docx

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Decibel

The decibel(abbreviated dB) is the unit used to measure the intensity of a sound.On the decibel scale, the smallest audible sound (near total silence) is 0 dB. Asound 10 times more powerful is 10 dB. A sound 100 times more powerful than neartotal silence is 0 dB. A sound 1,000 times more powerful than near total silence is!0 dB. "ere are some common sounds and their decibel ratin#s$

%ear total silence & 0 dB

A whisper & 1' dB

%ormal conversation & 0 dB

A lawnmower & 0 dB

A car horn & 110 dB

A roc* concert or a +et en#ine & 10 dB

A #unshot or recrac*er & 1-0 dB

istance a/ects the intensity of sound && if one is far away, the power is #reatlydiminished. All of the previous ratin#s are ta*en while standin# near the sound.

Any sound above ' dB can cause hearin# loss, and the loss is related both to thepower of the sound as well as the len#th of eposure. 2ou *now that you arelistenin# to an '&dB sound if you have to raise your voice to be heard by somebodyelse. 3i#ht hours of 0&dB sound can cause dama#e to your ears4 any eposure to1-0&dB sound causes immediate dama#e (and causes actual pain).

Questions:

7/24/2019 DECIBEL - QUESTIONS - Copy.docx

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1. 5s the unit used to measure the intensity of a sound.A. decibel B. volume 6. mass. Any sound above 777777can cause hearin# loss, and the loss is related both to

the power of the sound as well as the len#th of eposure.A. 1' dB B. 11' dB 6. '0 dB . ' dB

!. 5f one is far away, the intensity of sound is #reatly 7777777.A. multiplied B.diminished 6. etended