Appendix to Part 62
Table 62-1--Reference Duration
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dBA T (hours)
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80........................................................ 32.0
85........................................................ 16.0
86........................................................ 13.9
87........................................................ 12.1
88........................................................ 10.6
89........................................................ 9.2
90........................................................ 8.0
91........................................................ 7.0
92........................................................ 6.1
93........................................................ 5.3
94........................................................ 4.6
95........................................................ 4.0
96........................................................ 3.5
97........................................................ 3.0
98........................................................ 2.6
99........................................................ 2.3
100....................................................... 2.0
101....................................................... 1.7
102....................................................... 1.5
103....................................................... 1.3
104....................................................... 1.1
105....................................................... 1.0
106....................................................... 0.87
107....................................................... 0.76
108....................................................... 0.66
109....................................................... 0.57
110....................................................... 0.50
111....................................................... 0.44
112....................................................... 0.38
113....................................................... 0.33
114....................................................... 0.29
115....................................................... 0.25
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At no time shall any excursion exceed 115 dBA. For any value, the
reference duration (T) in hours is computed by: T = 8/2(L-90)/5 where
L is the measured A-weighted, slow-response sound pressure level.
Table 62-2--``Dose''TWA 8 Equivalent
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TWA\8\
Dose (percent)
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25........................................................... 80
29........................................................... 81
33........................................................... 82
38........................................................... 83
44........................................................... 84
50........................................................... 85
57........................................................... 86
66........................................................... 87
76........................................................... 88
87........................................................... 89
100.......................................................... 90
115.......................................................... 91
132.......................................................... 92
152.......................................................... 93
174.......................................................... 94
200.......................................................... 95
230.......................................................... 96
264.......................................................... 97
303.......................................................... 98
350.......................................................... 99
400.......................................................... 100
460.......................................................... 101
530.......................................................... 102
610.......................................................... 103
700.......................................................... 104
800.......................................................... 105
920.......................................................... 106
1056......................................................... 107
1213......................................................... 108
1393......................................................... 109
1600......................................................... 110
1838......................................................... 111
2111......................................................... 112
2425......................................................... 113
2786......................................................... 114
3200......................................................... 115
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Interpolate between the values found in this Table, or extend the Table,
by using the formula: TWA
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