PERFORMANCE STANDARDS FOR ALL ZONES
Maximum Permissible Sound-Pressure Level at Specified Points of Measurement for Noise Radiated Continuously from a Facility | |
Octave Band (Cycles per Second) | Sound Pressure Level (Decibels*) |
Maximum Permissible Sound-Pressure Level at Specified Points of Measurement for Noise Radiated Continuously from a Facility | |
Octave Band (Cycles per Second) | 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 |
4,800 - 10,000 | 28 |
10,000 - 20,000 | 26** |
20,000 - 30,000 | 25** |
30,000 - 40,000 | 24** |
40,000 - 50,000 | 23** |
Notes: * According to the following formula, Sound Pressure Level in Decibels equals 10 Log where P2 equals 0.0002 dynes/cm2 (P1+P2) ** To avoid possible interference with animal experiments | |
Correction in Maximum Permitted Sound Pressure Level in Decibels to Be Applied | |
Type of Operation of Character of Noise | Correction in Decibels |
Correction in Maximum Permitted Sound Pressure Level in Decibels to Be Applied | |
Type of Operation of Character of Noise | Correction in Decibels |
Noise source operates less than 20% of any 1-hour period | plus 5* |
Noise source operates less than 5% of any 1-hour period | plus 10* |
Noise source operates less than 1% of any 1-hour period | plus 15* |
Noise of impulsive character (hammering and the like) | minus 5 |
Noise or period character (hum, screech and the like) | minus 5 |
Notes: * Apply one of these corrections only. | |
Maximum Permitted Sound Pressure Level in Decibels | |
Octave Bandsound (Cycles per Second) | Pressure Level (Decibels*) |
Maximum Permitted Sound Pressure Level in Decibels | |
Octave Bandsound (Cycles per Second) | Pressure Level (Decibels*) |
0 - 74 | 70 |
75 - 149 | 74 |
150 - 299 | 66 |
300 - 599 | 59 |
600 - 1,199 | 53 |
1,200 - 2,399 | 47 |
2,400 - 4,799 | 41 |
4,800 and over | 39 |
Notes: * According to the following formula, sound pressure level in decibels equals 10 Log, where P2 equals 0.0002 dynes/cm2 (P1+P2) | |
PERFORMANCE STANDARDS FOR ALL ZONES
Maximum Permissible Sound-Pressure Level at Specified Points of Measurement for Noise Radiated Continuously from a Facility | |
Octave Band (Cycles per Second) | Sound Pressure Level (Decibels*) |
Maximum Permissible Sound-Pressure Level at Specified Points of Measurement for Noise Radiated Continuously from a Facility | |
Octave Band (Cycles per Second) | 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 |
4,800 - 10,000 | 28 |
10,000 - 20,000 | 26** |
20,000 - 30,000 | 25** |
30,000 - 40,000 | 24** |
40,000 - 50,000 | 23** |
Notes: * According to the following formula, Sound Pressure Level in Decibels equals 10 Log where P2 equals 0.0002 dynes/cm2 (P1+P2) ** To avoid possible interference with animal experiments | |
Correction in Maximum Permitted Sound Pressure Level in Decibels to Be Applied | |
Type of Operation of Character of Noise | Correction in Decibels |
Correction in Maximum Permitted Sound Pressure Level in Decibels to Be Applied | |
Type of Operation of Character of Noise | Correction in Decibels |
Noise source operates less than 20% of any 1-hour period | plus 5* |
Noise source operates less than 5% of any 1-hour period | plus 10* |
Noise source operates less than 1% of any 1-hour period | plus 15* |
Noise of impulsive character (hammering and the like) | minus 5 |
Noise or period character (hum, screech and the like) | minus 5 |
Notes: * Apply one of these corrections only. | |
Maximum Permitted Sound Pressure Level in Decibels | |
Octave Bandsound (Cycles per Second) | Pressure Level (Decibels*) |
Maximum Permitted Sound Pressure Level in Decibels | |
Octave Bandsound (Cycles per Second) | Pressure Level (Decibels*) |
0 - 74 | 70 |
75 - 149 | 74 |
150 - 299 | 66 |
300 - 599 | 59 |
600 - 1,199 | 53 |
1,200 - 2,399 | 47 |
2,400 - 4,799 | 41 |
4,800 and over | 39 |
Notes: * According to the following formula, sound pressure level in decibels equals 10 Log, where P2 equals 0.0002 dynes/cm2 (P1+P2) | |