Radio Shack Sound Level Meter Manual do Proprietário descarregar pdf (Página 16)

16

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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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