30 CFR Appendix to Part 62 - Appendix to Part 62
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Appendix to Part 62
Table 62-1—Reference Duration
dBA | T (hours) |
---|---|
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 |
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
Dose | TWA
8 (percent) |
---|---|
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 |
Interpolate between the values found in this Table, or extend the Table, by using the formula: TWA8 = 16.61 log10 (D/100) + 90.
Table 62-3—Age Correction Value in Decibels for Males (Selected Frequencies)
Age (years) | kHz | ||
---|---|---|---|
2 | 3 | 4 | |
20 or less | 3 | 4 | 5 |
21 | 3 | 4 | 5 |
22 | 3 | 4 | 5 |
23 | 3 | 4 | 6 |
24 | 3 | 5 | 6 |
25 | 3 | 5 | 7 |
26 | 4 | 5 | 7 |
27 | 4 | 6 | 7 |
28 | 4 | 6 | 8 |
29 | 4 | 6 | 8 |
30 | 4 | 6 | 9 |
31 | 4 | 7 | 9 |
32 | 5 | 7 | 10 |
33 | 5 | 7 | 10 |
34 | 5 | 8 | 11 |
35 | 5 | 8 | 11 |
36 | 5 | 9 | 12 |
37 | 6 | 9 | 12 |
38 | 6 | 9 | 13 |
39 | 6 | 10 | 14 |
40 | 6 | 10 | 14 |
41 | 6 | 10 | 14 |
42 | 7 | 11 | 16 |
43 | 7 | 12 | 16 |
44 | 7 | 12 | 17 |
45 | 7 | 13 | 18 |
46 | 8 | 13 | 19 |
47 | 8 | 14 | 19 |
48 | 8 | 14 | 20 |
49 | 9 | 15 | 21 |
50 | 9 | 16 | 22 |
51 | 9 | 16 | 23 |
52 | 10 | 17 | 24 |
53 | 10 | 18 | 25 |
54 | 10 | 18 | 26 |
55 | 11 | 19 | 27 |
56 | 11 | 20 | 28 |
57 | 11 | 21 | 29 |
58 | 12 | 22 | 31 |
59 | 12 | 22 | 32 |
60 or more | 13 | 23 | 33 |
Table 62-4—Age Correction Value in Decibels for Females (Selected Frequencies)
Age (years) | kHz | ||
---|---|---|---|
2 | 3 | 4 | |
20 or less | 4 | 3 | 3 |
21 | 4 | 4 | 3 |
22 | 4 | 4 | 4 |
23 | 5 | 4 | 4 |
24 | 5 | 4 | 4 |
25 | 5 | 4 | 4 |
26 | 5 | 5 | 4 |
27 | 5 | 5 | 5 |
28 | 5 | 5 | 5 |
29 | 5 | 5 | 5 |
30 | 6 | 5 | 5 |
31 | 6 | 6 | 5 |
32 | 6 | 6 | 6 |
33 | 6 | 6 | 6 |
34 | 6 | 6 | 6 |
35 | 6 | 7 | 7 |
36 | 7 | 7 | 7 |
37 | 7 | 7 | 7 |
38 | 7 | 7 | 7 |
39 | 7 | 8 | 8 |
40 | 7 | 8 | 8 |
41 | 8 | 8 | 8 |
42 | 8 | 9 | 9 |
43 | 8 | 9 | 9 |
44 | 8 | 9 | 9 |
45 | 8 | 10 | 10 |
46 | 9 | 10 | 10 |
47 | 9 | 10 | 11 |
48 | 9 | 11 | 11 |
49 | 9 | 11 | 11 |
50 | 10 | 11 | 12 |
51 | 10 | 11 | 12 |
52 | 10 | 12 | 13 |
53 | 10 | 13 | 13 |
54 | 11 | 13 | 14 |
55 | 11 | 14 | 14 |
56 | 11 | 14 | 15 |
57 | 11 | 15 | 15 |
58 | 12 | 15 | 16 |
59 | 12 | 16 | 16 |
60 or more | 12 | 16 | 17 |
[64 FR 49630, Sept. 13, 1999, as amended at 65 FR 66929, Nov. 8, 2000]