A Tables of Long-Term Background Ambient Noise

Section 910.APPENDIX A   Tables of Long-Term Background Ambient Noise Section 910.TABLE A   Daytime long-term background ambient L eq levels in decibels by land use categories and 1/3 octave-band level Background Category Octave-Band Center Frequency (Hz) 1 2 3 4 5 20 63 56 48 42 36 25 64 57 49 43 37 31 65 58 50 44 38 40 65 58 51 44 38 50 66 59 51 45 39 63 66 59 52 46 40 80 67 60 52 46 40 100 68 60 53 47 41 125 67 59 52 46 40 160 66 59 52 46 40 200 66 58 51 45 39 250 65 58 50 44 38 315 64 57 49 43 37 400 63 55 48 42 36 500 62 54 46 40 34 630 61 53 44 38 32 800 60 51 42 36 30 1000 58 49 40 34 28 1250 56 47 38 32 26 1600 54 45 36 30 24 2000 52 43 33 28 21 2500 50 41 30 25 19 3150 49 39 28 23 17 4000 48 37 25 20 15 5000 46 35 23 18 13 6300 44 33 21 16 10 8000 43 31 19 14 8 10,000 41 29 17 12 6 12,500 39 27 15 10 4