Performance Standards
Maximum Permitted Noise Levels | |
|---|---|
Frequency Ranges Containing Standard Octave Bands (cycles per second) | Octave Band Sound Pressure Level (decibels re 0.0002 dyne/cm) |
20 to 300 | 60 |
300 to 2,400 | 40 |
Above 2,400 | 30 |
Corrections to be Applied to Octave Band Sound Pressure Level in Decibels |
Type or Location of Noise or Character of Noise | Correction in Decibels* |
|---|---|
Daytime operation only | +5 |
Noise source operating less than: | |
20% of any 1-hour period | +5 |
5% of any 1-hour period | +10 |
Noise of impulsive character (hammering, etc.) | -5 |
Noise of periodic character | -5 |
* | NOTE: Apply one of these corrections only. |
Performance Standards
Maximum Permitted Noise Levels | |
|---|---|
Frequency Ranges Containing Standard Octave Bands (cycles per second) | Octave Band Sound Pressure Level (decibels re 0.0002 dyne/cm) |
20 to 300 | 60 |
300 to 2,400 | 40 |
Above 2,400 | 30 |
Corrections to be Applied to Octave Band Sound Pressure Level in Decibels |
Type or Location of Noise or Character of Noise | Correction in Decibels* |
|---|---|
Daytime operation only | +5 |
Noise source operating less than: | |
20% of any 1-hour period | +5 |
5% of any 1-hour period | +10 |
Noise of impulsive character (hammering, etc.) | -5 |
Noise of periodic character | -5 |
* | NOTE: Apply one of these corrections only. |