Answers

2015-06-04T13:02:29+05:30
weakest sound heard 0 dB
normal conversation at 3-5 ft 60-70 dB
dial tone of telephone 80 dB
city traffic inside car 85 dB
1983 OSHA monitoring requirements begin 90 dB
train whistle at 500 ft.90 dB
subway train at 200 ft.95 dB
regular sustained exposure may cause permanent damage 90-95 dB
pneumatic riveter at 4 ft.125 dB
0