XV 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/cm2) |
20 to 300 | 60 |
300 to 2,400 | 40 |
Above 2,400 | 30 |
Type or Location of Operation Correction or Character
of Noise in Decibels APPLY ONE OF THE CORRECTIONS, BELOW, ONLY | CORRECTIONS TO BE APPLIED TO OCTAVE BAND SOUND PRESSURE
LEVEL IN DECIBELS |
Daytime operation only (7:00 a.m. to 7:00 p.m.) | +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 |
Noise measured in mixed-use buildings | –5 |
XV 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/cm2) |
20 to 300 | 60 |
300 to 2,400 | 40 |
Above 2,400 | 30 |
Type or Location of Operation Correction or Character
of Noise in Decibels APPLY ONE OF THE CORRECTIONS, BELOW, ONLY | CORRECTIONS TO BE APPLIED TO OCTAVE BAND SOUND PRESSURE
LEVEL IN DECIBELS |
Daytime operation only (7:00 a.m. to 7:00 p.m.) | +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 |
Noise measured in mixed-use buildings | –5 |