AAO-HNSF Certificate Program for Otolaryngology Personnel

dB Sound Pressure Level • 0.0002 dyne/sq cm • 0.002 microbar • 20 micronewtons/sq mm • 20 micropascals

AAO-HNS/F

Certificate Program for Otolaryngology Personnel Workshop

13

Decibels: Power • Decibel scale is logarithmic

–Each 20 dB increase in sound = 10 times increase in energy

–40 dB=100x –60 dB=1000x

AAO-HNS/F

Certificate Program for Otolaryngology Personnel Workshop

14

80

154

194

134

174

0

20

40 60

74

84

94

114

3.16

10

100

0.0002

0.002

0.02 0.2 1

10,000

1,000,000

2

1000

100,000

AAO-HNS/F

Certificate Program for Otolaryngology Personnel Workshop

15