Answers

2015-06-10T11:28:39+05:30
80dB  office, electric shaver, alarm clock, police whistle
70dB radio, normal street noise
60
dB conversational speech
50
dB office noise, quiet stream
45
dB To awaken a sleeping person
40
dB residence, normal private office
30
dB Recording studio, quiet conversation
20
dB Whisper, empty theater, ticking of watch
10
dB Threshold of good hearing
0 Threshold of excellent youthful hearing

0