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Permissible Noise Levels

The document provides a table of permissible noise levels measured in decibels (A-weighted sound level, L) and their corresponding durations in hours (T). As the noise level increases, the permissible duration decreases significantly. The table outlines values from 80 dB with a duration of 32 hours down to 130 dB with a duration of 0.031 hours.

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37 views2 pages

Permissible Noise Levels

The document provides a table of permissible noise levels measured in decibels (A-weighted sound level, L) and their corresponding durations in hours (T). As the noise level increases, the permissible duration decreases significantly. The table outlines values from 80 dB with a duration of 32 hours down to 130 dB with a duration of 0.031 hours.

Uploaded by

laurajtodd21
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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Permissible Noise Levels

_________________________________________________

Reference

A-weighted sound level, L (decibel) duration,

T (hour)
_________________________________________________
80................................... 32
81................................... 27.9
82................................... 24.3
83................................... 21.1
84................................... 18.4
85................................... 16
86................................... 13.9
87................................... 12.1
88................................... 10.6
89................................... 9.2
90................................... 8
91................................... 7.0
92................................... 6.1
93................................... 5.3
94................................... 4.6
95................................... 4
96................................... 3.5
97................................... 3.0
98................................... 2.6
99................................... 2.3
100.................................. 2
101.................................. 1.7
102.................................. 1.5
103.................................. 1.3
104.................................. 1.1
105.................................. 1
106.................................. 0.87
107.................................. 0.76
108.................................. 0.66
109.................................. 0.57
110.................................. 0.5
111.................................. 0.44
112.................................. 0.38
113.................................. 0.33
114.................................. 0.29
115.................................. 0.25
116.................................. 0.22
117.................................. 0.19
118.................................. 0.16
119.................................. 0.14
120.................................. 0.125
121.................................. 0.11
122.................................. 0.095
123.................................. 0.082
124.................................. 0.072
125.................................. 0.063
126.................................. 0.054
127.................................. 0.047
128.................................. 0.041
129.................................. 0.036
130.................................. 0.031
______________________________________________

In the above table the reference duration, T, is computed by

where L is the measured A-weighted sound level.

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