| Table
5 - |
Correction
Factors to Obtain the Predicted Noise Level (PNL)
from Sound Power Level at Given Distances
|
|
| Distance
(m) |
Correction
(dB(A)) |
| 0 |
8 |
| 1 |
8 |
| 2 |
14 |
| 3 |
18 |
| 4 |
20 |
| 5 |
22 |
| 6 |
24 |
| 7 |
25 |
| 8 |
26 |
| 9 |
27 |
| 10 |
28 |
| 11 |
29 |
| 12 |
30 |
| 13 |
30 |
| 14 |
31 |
| 15
to 16 |
32 |
| 17
to 18 |
33 |
| 19
to 21 |
34 |
| 22
to 23 |
35 |
| 24
to 26 |
36 |
| 27
to 29 |
37 |
| 30
to 33 |
38 |
| 34
to 37 |
39 |
| 38
to 41 |
40 |
| 42
to 47 |
41 |
| 48
to 52 |
42 |
| 53
to 59 |
43 |
| 60
to 66 |
44 |
| 67
to 74 |
45 |
| 75
to 83 |
46 |
| 84
to 93 |
47 |
| 94
to 105 |
48 |
| 106
to 118 |
49 |
| 119
to 132 |
50 |
| 133
to 148 |
51 |
| 149
to 166 |
52 |
| 167
to 187 |
53 |
| 188
to 210 |
54 |
| 211
to 235 |
55 |
| 236
to 264 |
56 |
|
265
to 300
|
57
|
For the
purpose of determining the correction to be used for converting
from sound power level at the source to the PNL at the NSR,
the distance from the source position to the NSR shall be
determined to the nearest whole metre, with values of 0.5
or more being rounded upwards.
This table
is only valid for distances of up to 300 m. For distances
greater than 300 m the Authority shall calculate appropriate
correction factors having regard to standard acoustical principles
and practices.
|
|