Limited Industrial Districts
Table 1 | |||||
|---|---|---|---|---|---|
Maximum Permitted Sound Levels, dB(a) (re: 0.0002 Microbar) | |||||
Sound Measured in: | Decibels | ||||
Continuous Slow Meter Response | Impact Fast Meter Response | ||||
O-R | M-1 | O-R | M-1 | ||
Residential Districts | 50 | 50 | 60 | 60 | |
Commercial Districts | 60 | 65 | 70 | 75 | |
P.V. | = | 6.28 F x D | |
P.V. | = | Particle velocity, inches per second | |
F. | = | Vibration frequency, cycles per second | |
D. | = | Single amplitude displacement of the vibration, inches |
Table 2 | ||||
|---|---|---|---|---|
Maximum Ground Transmitted Vibration for Limited Industrial Districts | ||||
Particle Velocity, Adjacent Lot Line | Inches/Second Residential District | |||
Limited Industrial | 0.20 | 0.02 | ||
When vibration is produced as discrete impulses and such impulses do not exceed a frequency of 100 per minute, then the values in Table 2 may be multiplied by two. |
Limited Industrial Districts
Table 1 | |||||
|---|---|---|---|---|---|
Maximum Permitted Sound Levels, dB(a) (re: 0.0002 Microbar) | |||||
Sound Measured in: | Decibels | ||||
Continuous Slow Meter Response | Impact Fast Meter Response | ||||
O-R | M-1 | O-R | M-1 | ||
Residential Districts | 50 | 50 | 60 | 60 | |
Commercial Districts | 60 | 65 | 70 | 75 | |
P.V. | = | 6.28 F x D | |
P.V. | = | Particle velocity, inches per second | |
F. | = | Vibration frequency, cycles per second | |
D. | = | Single amplitude displacement of the vibration, inches |
Table 2 | ||||
|---|---|---|---|---|
Maximum Ground Transmitted Vibration for Limited Industrial Districts | ||||
Particle Velocity, Adjacent Lot Line | Inches/Second Residential District | |||
Limited Industrial | 0.20 | 0.02 | ||
When vibration is produced as discrete impulses and such impulses do not exceed a frequency of 100 per minute, then the values in Table 2 may be multiplied by two. |