Noise.
Frequency Band (Cycles Per Second) | Maximum Permitted Sound Pressure Level Decibels |
|---|---|
20 - 75 | 69 |
75 - 150 | 54 |
150 - 300 | 47 |
300 - 600 | 41 |
600 - 1,200 | 37 |
1,200 - 2,400 | 34 |
2,400 - 4,800 | 31 |
Above 4,800 | 28 |
Type of operation of Character of Noise | Correction In Decibels |
|---|---|
Daytime operation only (7:00 a.m. to 10:00 p.m.) | +5 |
Noise occurs less than 5% of any one-hour period | +5 |
Noise is of peculiar character (hum, scream, etc.) or is of impulsive character (hammering, etc.) (In the case of impulsive noise, the correction shall apply only to the average pressure during an impulse, and impulse peaks shall not exceed the basic standards given above.) | -5 |
Noise.
Frequency Band (Cycles Per Second) | Maximum Permitted Sound Pressure Level Decibels |
|---|---|
20 - 75 | 69 |
75 - 150 | 54 |
150 - 300 | 47 |
300 - 600 | 41 |
600 - 1,200 | 37 |
1,200 - 2,400 | 34 |
2,400 - 4,800 | 31 |
Above 4,800 | 28 |
Type of operation of Character of Noise | Correction In Decibels |
|---|---|
Daytime operation only (7:00 a.m. to 10:00 p.m.) | +5 |
Noise occurs less than 5% of any one-hour period | +5 |
Noise is of peculiar character (hum, scream, etc.) or is of impulsive character (hammering, etc.) (In the case of impulsive noise, the correction shall apply only to the average pressure during an impulse, and impulse peaks shall not exceed the basic standards given above.) | -5 |