Special Use Permits
TABLE I | ||
|---|---|---|
Frequency Ranges Containing Standard Octave Bands in Cycles per Second | Octave Band Sound-Pressure Level in Decibels re 0.0002 dyne/cm | |
20 to 75 | 67 | |
75 to 150 | 66 | |
150 to 300 | 61 | |
300 to 600 | 54 | |
600 to 1,200 | 47 | |
1,200 to 2,400 | 39 | |
2,400 to 4,800 | 29 | |
4,800 to 10,000 | 20 | |
TABLE II | ||
|---|---|---|
Type of Operation or Character of Noise | Correction in Decibels | |
Daytime operation only | +5 | |
Noise source operates less than 20% of any one-hour period | +5* | |
Noise source operates less than 5% of any one-hour period | +10* | |
Noise of impulsive or periodic character (hammering, etc.) | -5 | |
NOTES: *Apply one of these corrections only. | ||
Special Use Permits
TABLE I | ||
|---|---|---|
Frequency Ranges Containing Standard Octave Bands in Cycles per Second | Octave Band Sound-Pressure Level in Decibels re 0.0002 dyne/cm | |
20 to 75 | 67 | |
75 to 150 | 66 | |
150 to 300 | 61 | |
300 to 600 | 54 | |
600 to 1,200 | 47 | |
1,200 to 2,400 | 39 | |
2,400 to 4,800 | 29 | |
4,800 to 10,000 | 20 | |
TABLE II | ||
|---|---|---|
Type of Operation or Character of Noise | Correction in Decibels | |
Daytime operation only | +5 | |
Noise source operates less than 20% of any one-hour period | +5* | |
Noise source operates less than 5% of any one-hour period | +10* | |
Noise of impulsive or periodic character (hammering, etc.) | -5 | |
NOTES: *Apply one of these corrections only. | ||