Table 4 - Correction Factors to Obtain the Predicted Noise Level(PNL) from Sound Power Level at Given Distances | |
Distance (m) | Correction (dB(A)) |
---|---|
0 | 17 |
1 | 17 |
2 | 20 |
3 | 21 |
4 | 23 |
5 | 24 |
6 | 24 |
7 | 25 |
8 | 26 |
9 | 27 |
10 | 29 |
11 | 30 |
12 | 30 |
13 | 31 |
14 | 32 |
15 | 33 |
16 | 33 |
17 | 34 |
18 | 34 |
19 | 35 |
20 to 21 | 36 |
22 to 24 | 37 |
25 to 26 | 38 |
27 to 29 | 39 |
30 to 32 | 40 |
33 to 36 | 41 |
37 to 39 | 42 |
40 to 43 | 43 |
44 to 48 | 44 |
49 to 53 | 45 |
54 to 59 | 46 |
60 to 65 | 47 |
66 to 72 | 48 |
73 to 79 | 49 |
80 to 87 | 50 |
88 to 96 | 51 |
97 to 107 | 52 |
108 to 118 | 53 |
119 to 130 | 54 |
131 to 144 | 55 |
145 to 159 | 56 |
160 to 175 | 57 |
176 to 193 | 58 |
194 to 214 | 59 |
215 to 236 | 60 |
237 to 260 | 61 |
261 to 288 | 62 |
289 to 317 | 63 |
318 to 351 | 64 |
352 to 387 | 65 |
388 to 427 | 66 |
428 to 472 | 67 |
473 to 521 | 68 |
522 to 575 | 69 |
576 to 635 | 70 |
636 to 700 | 71 |