Thursday, May 14, 2009

Specially for Esther Kueh who dosen't know what is LOUD

So How Loud Is Loud?

110dB + Deafening 12" Cannon @ 12 feet(225)
People shouting in your ear
Close to a train(110)
>130 dB Immediate hearing damage
90 dB + Very Loud Car Horn at 5 meters(100db)

>90 dB regularly can cause hearing damage.

70 - 80 dB Loud police whistle, city street noise
45 - 60 dB Moderate normal conversation at close up.
Normal office noise.
30 - 40 dB Faint Quiet conversation, private office, recording studio.
20 dB & less Very Faint watch ticking, whispering, sound proof room.

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