Performance Standards
B Zones and I Zone | |
|---|---|
Frequency Ranges Containing Standard Octave Bands in Cycles per Second | Octave Band Sound Pressure Level in Decibels |
0 to 74 | 72 |
75 to 149 | 67 |
150 to 299 | 59 |
300 to 599 | 52 |
600 to 1,199 | 46 |
1,200 to 2,399 | 40 |
2,400 to 4,800 | 34 |
above 4,800 | 32 |
Type of Operation or Noise | Correction in Decibels |
|---|---|
Daytime operation only | +5 |
Noise of impulsive character (e.g., hammering) | -5 |
Noise of periodic character (e.g., hum, screech) | -5 |
Performance Standards
B Zones and I Zone | |
|---|---|
Frequency Ranges Containing Standard Octave Bands in Cycles per Second | Octave Band Sound Pressure Level in Decibels |
0 to 74 | 72 |
75 to 149 | 67 |
150 to 299 | 59 |
300 to 599 | 52 |
600 to 1,199 | 46 |
1,200 to 2,399 | 40 |
2,400 to 4,800 | 34 |
above 4,800 | 32 |
Type of Operation or Noise | Correction in Decibels |
|---|---|
Daytime operation only | +5 |
Noise of impulsive character (e.g., hammering) | -5 |
Noise of periodic character (e.g., hum, screech) | -5 |