Here is a quick education designed specifically for Scott Maxwell. The decibel system is a logarithmic scale. His column states that a gun with a silencer has the equivalent sound of a jackhammer (see chart below). When a silencer drops the volume of sound by 30 decibels, it reduces the volume by 1,000 times. His column parrots the talking points out of the NRA about a gun with a silencer = a jackhammer, but is that a jackhammer switched on or a jackhammer striking concrete? Notice that with each increase of 10dB, the sound is 10 TIMES more powerful than the original reference point. So, if you start with 60dB (normal speech volume) as reference point, and you introduce a sound that measures 120dB, the power hasnt doubled (i.e. 60x2 = 120)... it has actually increased by 1,000,000 TIMES! You compute that by assuming that your 60dB reference point is one one unit. With each 10dB increase, the power of the sound increases 10 times, therefore 70dB is 10x more powerful, 80dB is 100x more powerful, 90dB is 1,000x more powerful, and so on. gcaudio/resources/howtos/loudness.html
Posted on: Wed, 19 Nov 2014 19:29:05 +0000
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