Environmental Regulations
Center Frequency (cycles per second) | Maximum Permitted Sound-Pressure Level (decibels) |
|---|---|
31.5 | 65 |
63.0 | 67 |
125.0 | 66 |
250.0 | 59 (sound-pressure level |
500.0 | 52 in decibels equals |
1,000.0 | 46 0.0002 dynes/cm) |
2,000.0 | 37 |
4,000.0 | 26 |
8,000.0 | 17 |
Center Frequency (cycles per second) | Maximum Permitted Sound-Pressure Level (decibels) |
|---|---|
31.5 | 76 |
63.0 | 74 |
125.0 | 68 |
250.0 | 63 (Sound-pressure level |
500.0 | 57 in decibels equals |
1,000.0 | 52 0.0002 dynes/cm) |
2,000.0 | 45 |
4,000.0 | 38 |
8,000.0 | 32 |
PV | = | 6.28 F × D where |
PV | = | Particle velocity, inches per second |
F | = | Vibration frequency, cycles per second |
D | = | Single amplitude displacement of the vibration, in inches. |
Maximum Ground Transmitted Vibration | ||
|---|---|---|
Particle Velocity (inches per second) | ||
Zoning District | Adjacent Lot Line | Residential District |
C, ROS, and R | 0.02 | 0.02 |
A | 0.05 | 0.02 |
VC, HC, CI, and I | 0.10 | 0.02 |
Source: Industrial Performance Standards, Planning Advisory Service Report No. 272, American Planning Association, September, 1971. |
Environmental Regulations
Center Frequency (cycles per second) | Maximum Permitted Sound-Pressure Level (decibels) |
|---|---|
31.5 | 65 |
63.0 | 67 |
125.0 | 66 |
250.0 | 59 (sound-pressure level |
500.0 | 52 in decibels equals |
1,000.0 | 46 0.0002 dynes/cm) |
2,000.0 | 37 |
4,000.0 | 26 |
8,000.0 | 17 |
Center Frequency (cycles per second) | Maximum Permitted Sound-Pressure Level (decibels) |
|---|---|
31.5 | 76 |
63.0 | 74 |
125.0 | 68 |
250.0 | 63 (Sound-pressure level |
500.0 | 57 in decibels equals |
1,000.0 | 52 0.0002 dynes/cm) |
2,000.0 | 45 |
4,000.0 | 38 |
8,000.0 | 32 |
PV | = | 6.28 F × D where |
PV | = | Particle velocity, inches per second |
F | = | Vibration frequency, cycles per second |
D | = | Single amplitude displacement of the vibration, in inches. |
Maximum Ground Transmitted Vibration | ||
|---|---|---|
Particle Velocity (inches per second) | ||
Zoning District | Adjacent Lot Line | Residential District |
C, ROS, and R | 0.02 | 0.02 |
A | 0.05 | 0.02 |
VC, HC, CI, and I | 0.10 | 0.02 |
Source: Industrial Performance Standards, Planning Advisory Service Report No. 272, American Planning Association, September, 1971. |