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Appendix - Typical 'A' Weighted Sound Levels
* For
ice
an
arts
on
3 or
ext.
3 to
be
les,
not
tion
ech
ose
otal
>ive
50 HP Siren (100')
Jet take-off (200')
Riveting machine
Subway (20')
Pneumatic drill (SO')
Vacuum cleaner (10')
Large store
Small office
Residential area (night)
Whisper (5')
Threshold of hearing
130-
110
90
70
50
30
10-
140
120
100
Chain saw
80
60
40
Boiler room
Freight train (100')
Speech (1')
Large Office
Residence
20
Sound studio
001
11
Model 407764 Version 1.3 October 2001
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