...Fuck With That!
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Decibels, Frequencies, Format Comparisons
IP:
DECIBELS
0 dB: the "threshold of hearing"...or the faintest sound an average person can hear
10 dB: the sound of a pin dropping from one yard away
20 dB: soft whispering...or the hum of a refrigerator
30 dB: the sound level of a library
40 dB: a quiet conversation
50 dB: a teacher speaking to a class in a medium-sized classroom
60 dB: the sound level of a busy office...or a sewing machine
70 dB: a vacuum cleaner...or a blow dryer...or a busy sidewalk
80 dB: a laundromat...or an alarm clock (may appear to be louder on Monday mornings)
90 dB: the volume of a lawn mower. To protect your hearing, you should expose yourself to no more than 8 hours per day of sound at this level (not an excuse to avoid mowing the lawn)
100 dB: a large orchestra playing loudly...or a chainsaw...or a person yelling as loudly as they can, for whatever reason (limit exposure to 2 hours per day at this volume level. And see what's wrong with that person)
110 dB: a rock concert...or a car horn...or a motorcycle...or a jackhammer (no more than 1 hour per day at this level)
120 dB: a car stereo at full blast...or a conversation between teenagers at the next table in the restaurant (maximum of 15 minutes a day at this volume level)
THE FOLLOWING VOLUME LEVELS ARE IN THE "DANGER ZONE" -- AVOID ALL EXPOSURE IF POSSIBLE:
130 dB: loud headphones...or a jet taking off from a few blocks away (physical ear-pain begins at this level)
140 dB: a fire cracker explosion up close
150 dB: an M-80 or cherry bomb explosion up close
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