Radio Shack Sound Level Meter Manuel du propriétaire télécharger pdf (Page 16)

16

Controls

CHECKING NOISE LEVELS

This chart, gathered from Federal, State,

and local agencies, shows standards for

acceptable noise levels.

Permissible noise exposures. Extracted

from U.S. Department of Labor Noise Regu-

lations.

Noise is inevitable in almost any environ-

ment. Depending on the level and dura-

tion, noise can be a minor irritant, a

definite disturbance, or even a threat to

your hearing.

Sound Level (dB)

(A-weighting,

SLOW response)

Maximum

Duration per Day

(hours)

90 8

92 6

95 4

97 3

100 2

102 1

1

/2

105 1

110

1

/2

115

1

/2 or less

1 2 ... 11 12 13 14 15 16 17 18 19 20

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