Performance Standards.
Table I | |
|---|---|
Octave Band (Frequency Cycles per Second) | Maximum Sound Permitted (Decibels)* |
0 to 75 | 69 |
75 to 150 | 54 |
150 to 300 | 47 |
300 to 600 | 41 |
600 to 1,200 | 37 |
1,200 to 2,400 | 34 |
2,400 to 4,800 | 31 |
Above 4,800 | 28 |
* | Shall be adjusted based upon certain characteristics of noise as listed in Table II. |
Table II Adjustments | |
|---|---|
Type of Operation or Noise | Correction in Decibels |
Daytime operation only (7:00 a.m. - 9:59 p.m.) | +5 |
Noise source operates less than 5% of time (daytime only) | +10 |
Noise of impulsive character (hammering, etc.) | -5 |
Noise of periodic character (hum, screech) | -5 |
Performance Standards.
Table I | |
|---|---|
Octave Band (Frequency Cycles per Second) | Maximum Sound Permitted (Decibels)* |
0 to 75 | 69 |
75 to 150 | 54 |
150 to 300 | 47 |
300 to 600 | 41 |
600 to 1,200 | 37 |
1,200 to 2,400 | 34 |
2,400 to 4,800 | 31 |
Above 4,800 | 28 |
* | Shall be adjusted based upon certain characteristics of noise as listed in Table II. |
Table II Adjustments | |
|---|---|
Type of Operation or Noise | Correction in Decibels |
Daytime operation only (7:00 a.m. - 9:59 p.m.) | +5 |
Noise source operates less than 5% of time (daytime only) | +10 |
Noise of impulsive character (hammering, etc.) | -5 |
Noise of periodic character (hum, screech) | -5 |