The following is a list of DECIBEL INTENSITIES taken from Encarta 2005.

0-Threshold of hearing
10-rustle of leaves, a quiet whisper
20-average whisper
20-50-quiet conversation
40-45-hotel, theater between performances
50-65-loud conversation
65-70-traffic on a busy street
65-90-train
75-80-factory noise( light/medium work)
90-heavy traffic
90-100-thunder
110-140-jet aircraft at takeoff
130-threshold of pain
140-190-space rocket on takeoff

http://www.800nonoise.com/tutorial_noiselist.htm

Sound Decibel Level Time Permitted
rustling leaves 20 dB no limit
whispering 25 dB no limit
library 30 dB no limit
refrigerator 45 dB no limit
average home 50 dB no limit
normal conversation 60 dB no limit
clothes dryer 60 dB no limit
washing machine 65 dB no limit
dishwasher 65 dB no limit
car 70 dB no limit
vacuum cleaner 70 dB no limit
mixer 70 dB no limit
electric sewing machine 70 dB no limit
busy traffic 75 dB no limit
mini-bike 80 dB no limit
alarm clock 80 dB no limit
noisy restaurant 80 dB no limit
office tabulator 80 dB no limit
outboard motor 80 dB no limit
passing snowmobile 80 dB no limit
average factory 85 dB 8 hours
electric shaver 85 dB 8 hours
screaming child 90 dB 8 hours
passing motorcycle 90 dB 8 hours
convertible ride on frw 95 dB 4 hours
subway train 100 dB 2 hours
diesel truck 100 dB 2 hours
woodworking shop 100 dB 2 hours
pneumatic drill 100 dB 2 hours
boiler shop 100 dB 2 hours
jackhammer 100 dB 2 hours
helicopter 105 dB 1 hour
power mower 105 dB 1 hour
snowmobile drvrs seat 110 dB 30 minutes
inboard motorboat 110 dB 30 minutes
sandblasting 110 dB 30 minutes
live rock music 90-130 dB 8-0.3 hours
auto horn 120 dB 7.5 mins
propeller aircraft 120 dB 7.5 mins
air raid siren 130 dB 3.75 mins
THRESHOLD OF PAIN 140 dB danger level
gunshot 140 dB danger level
jet engine 140 dB danger level
rocket launching 180 dB danger level