TITLE 35: ENVIRONMENTAL PROTECTION SUBTITLE H: NOISE
CHAPTER I: ILLINOIS POLLUTION CONTROL BOARD
PART 910 MEASUREMENT PROCEDURES FOR THE ENFORCEMENT OF 35 ILL. ADM. CODE 900 & 901
SECTION 910.APPENDIX A TABLES OF LONG-TERM BACKGROUND AMBIENT NOISE

Section 910.APPENDIX A   Tables of Long-Term Background Ambient Noise

 

Section 910.TABLE C   Daytime long-term background ambient Leq levels in decibels by land use

categories and octave-band level

 

 

Background Category

 

Octave-Band Center Frequency (Hz)

1

2

3

4

5

 

 

 

 

 

 

31

70

63

55

49

43

63

71

64

57

51

45

125

72

64

57

51

45

250

70

63

55

49

43

500

67

59

51

45

39

1000

63

54

45

39

33

2000

57

48

38

33

26

4000

53

42

30

25

20

8000

48

36

24

19

13