Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 910 - MEASUREMENT PROCEDURES FOR THE ENFORCEMENT OF 35 ILL. ADM. CODE 900 AND 901
Appendix A - Tables of Long-Term Background Ambient Noise
Table D - Nighttime long-term background ambient L[eq] levels in decibels by land use categories and octave-band level
Universal Citation: 35 IL Admin Code ยง D
Current through Register Vol. 48, No. 38, September 20, 2024
|
Background Category |
|||||||
|
Octave-Band Center Frequency (Hz) |
1 |
2 |
3 |
4 |
5 |
||
|
31 |
60 |
55 |
50 |
44 |
38 |
||
|
63 |
61 |
56 |
52 |
46 |
40 |
||
|
125 |
62 |
56 |
52 |
46 |
40 |
||
|
250 |
60 |
55 |
50 |
44 |
38 |
||
|
500 |
57 |
51 |
46 |
40 |
34 |
||
|
1000 |
53 |
46 |
40 |
34 |
28 |
||
|
2000 |
47 |
40 |
33 |
28 |
21 |
||
|
4000 |
43 |
34 |
25 |
20 |
15 |
||
|
8000 |
38 |
28 |
19 |
14 |
8 |
||
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