here, I cleaned up PCHPlayer's post:
0 dBA generally accepted as the lowest limit of human audio perception; you're unlikely ever to hear anything this quiet because of internal body noises
10 dBA a very_ quiet room (no wind, cars, etc.) like a well-insulated recording studio
20 dBA outside in the country side with no wind or animals
30 dBA inside a library
40 dBA someone talking quietly in the same room
50 dBA someone talking at a distance of a metre or so; a quiet orchestral passage
60 dBA in a car, with windows down, in the city; playing a guitar
70 dBA somebody shouting nearby, outside
80 dBA shouting in the same room; a loud orchestral passage
90 dBA machine-shop floor, drills and machines going; propeller aircraft engines nearby; pleasantly loud music
100 dBA someone shouting close to your head; car horns
110 dBA very loud rock concert; commercial jet aircraft taxiing at 100 m
120 dBAvery loud sound: jet engines; jackhammers up close (threshold of feeling)
130 dBA too loud: explosions; stock car engine up close (threshold of pain)
140 dBA some sounds have transients up here or beyond; drums with your ear up close, big explosions
150 dBA can do immediate damage
160 dBA Delta fans (just kidding)