Common Sounds and Their Approximate Db Levels

Loudness is measured in decibels (dB). Experts recommend that you use earplugs when exposed to 85 dB and above. The following list shows common sounds and their approximate dB levels.

20 dB: Ticking watch

30 dB: Quiet whisper

40 dB: Refrigerator hum

50 dB: Rainfall

60 dB: Sewing machine

70 dB: Washing machine

80 dB: Alarm clock (two feet away)

85 dB: Average traffic

95 dB: MRI

100 dB: Blow dryer, subway train

105 dB: Power mower, chain saw