Guide to common noise levels

Page 1

GUIDE TO COMMON NOISE LEVELS AND APPROPRIATE HEARING CLASS COMMON NOISE LEVELS

CLASS SYSTEM

Whisper

25dB

Class

SLC80 dB

For use in noise

Quiet office

50 – 60dB

1

10 – 13

Less than 90dB(A)

Restaurant

60 – 70dB

2

14 – 17

90 to less than 95dB(A)

50kW Electric motor

90dB

3

18 – 21

95 to less than 100dB(A)

Angle grinder

85 – 115dB

4

22 – 25

100 to less than 105dB(A)

Compressor

101 – 123dB

5

26+

105 to less than 110dB(A)

Diesel generator

107 – 111dB

Mining drill

108 – 113dB

Power saw

110dB

Rock drill

110dB

Threshold of discomfort

120dB

Threshold of pain

130dB

Jet aircraft from 50m away

140dB

Hammer on steel plate at 1m

160dB

Slap directly on the ear

170dB

Toy pistol fired next to ear

180dB

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