Dangerousdecibels has a very graphic answer to this question.
The noise chart below lists average decibel levels for everyday sounds around you.
Painful
150 dB = fireworks at 3 feet
140 dB = firearms, jet engine
130 dB = jackhammer
120 dB = jet plane takeoff, siren
Extremely Loud
110 dB = maximum output of some MP3 players, model airplane, chain saw
106 dB = gas lawn mower, snowblower
100 dB = hand drill, pneumatic drill
90 dB = subway, passing motorcycle
Very Loud
80–90 dB = blow-dryer, kitchen blender, food processor
70 dB = busy traffic, vacuum cleaner, alarm clock
Moderate
60 dB = typical conversation, dishwasher, clothes dryer
50 dB = moderate rainfall
40 dB = quiet room
Faint
30 dB = whisper, quiet library
(Retrieved from www.noisyplanet.nidcd.nih.gov/parents/athome.htm andwww.lhh.org/noise/facts/environment.html on September 24, 2009)
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