General Regulations
Residential | Commercial/Industrial | ||||
|---|---|---|---|---|---|
Minimum | Maximum | Minimum | Maximum | ||
One-way | 10 feet | 14 feet | 12 feet | 16 feet | |
Two-way | 12 feet | 18 feet | 22 feet | 26 feet | |
Octave Band Center Frequency of Measurement (Hz) | Octave Band Level for Business/Industrial Zones in Decibels | Octave Band Level for Residential Zones and for Uses Abutting Residential Zones | |
|---|---|---|---|
31.5 | 79 | 54 | |
63 | 78 | 53 | |
125 | 73 | 48 | |
250 | 68 | 45 | |
500 | 62 | 41 | |
1,000 | 56 | 37 | |
2,000 | 51 | 34 | |
4,000 | 47 | 32 | |
8,000 | 44 | 30 |
Notes: | |||
|---|---|---|---|
l. | Acoustical terminology is that most recently approved by the American National Standards Institute (ANSI). | ||
2. | Reference pressure shall be 0.0002 microbars. | ||
3. | Hz is the abbreviation for Hertz, which means cycles per second. | ||
4. | For preliminary survey and monitoring the approximate single number, 65 dB(A) may be used for commercial and industrial zones and 40 dB(A) may be used for residential zones and for uses abutting residential zones. | ||
5. | dB(A) shall mean A-weighted sound pressure level in decibels as measured on a general purpose sound-level meter complying with the provisions of American Standard for General Purpose Sound-Level Meters (Sl.4-1971), ANSI or OSI (1999), properly calibrated, and operated on the “A” weighting network. | ||
Zone | Screening Requirement | Buffer Width | |
|---|---|---|---|
I and B2 | Greenbelt | 30 feet | |
IP | Greenbelt | 40 feet | |
B1 | Barrier | 5 feet |
General Regulations
Residential | Commercial/Industrial | ||||
|---|---|---|---|---|---|
Minimum | Maximum | Minimum | Maximum | ||
One-way | 10 feet | 14 feet | 12 feet | 16 feet | |
Two-way | 12 feet | 18 feet | 22 feet | 26 feet | |
Octave Band Center Frequency of Measurement (Hz) | Octave Band Level for Business/Industrial Zones in Decibels | Octave Band Level for Residential Zones and for Uses Abutting Residential Zones | |
|---|---|---|---|
31.5 | 79 | 54 | |
63 | 78 | 53 | |
125 | 73 | 48 | |
250 | 68 | 45 | |
500 | 62 | 41 | |
1,000 | 56 | 37 | |
2,000 | 51 | 34 | |
4,000 | 47 | 32 | |
8,000 | 44 | 30 |
Notes: | |||
|---|---|---|---|
l. | Acoustical terminology is that most recently approved by the American National Standards Institute (ANSI). | ||
2. | Reference pressure shall be 0.0002 microbars. | ||
3. | Hz is the abbreviation for Hertz, which means cycles per second. | ||
4. | For preliminary survey and monitoring the approximate single number, 65 dB(A) may be used for commercial and industrial zones and 40 dB(A) may be used for residential zones and for uses abutting residential zones. | ||
5. | dB(A) shall mean A-weighted sound pressure level in decibels as measured on a general purpose sound-level meter complying with the provisions of American Standard for General Purpose Sound-Level Meters (Sl.4-1971), ANSI or OSI (1999), properly calibrated, and operated on the “A” weighting network. | ||
Zone | Screening Requirement | Buffer Width | |
|---|---|---|---|
I and B2 | Greenbelt | 30 feet | |
IP | Greenbelt | 40 feet | |
B1 | Barrier | 5 feet |