(A) Standards applicable to all zones. The regulations in this section aim to prohibit unnecessary, excessive and annoying noises from all sources, as certain noise levels are detrimental to the health and welfare of individuals. The standards apply to all land uses in all zones unless otherwise specified.
(B) Noise measurements. Noise shall be measured with a sound level meter that meets the standards of the American National Standards Institute (ANSI Section S1.4-1979, Type 1 or Type 2). The unit of measure shall be designated as a decibel (dBA). Noise levels shall be measured in dBA at the property line of the receptor property, and at least four feet above the ground and five feet from the nearest structure or wall. Where a boundary or wall exists, the measurement shall be made on the receptor property. A calibration check shall be made of the instrument at the time any noise measurement is made.
(C) Exterior noise standards.
(1) No person shall create or allow the creation of noise that causes the exterior noise level to exceed the noise standards set forth in Table 153.140.070 (C).
Noise Standards
| ||
Zone | Time | Allowable Noise Level (dbA) |
Noise Standards
| ||
Zone | Time | Allowable Noise Level (dbA) |
Residential | 7 a.m. - 7 p.m. (Day) | 55 |
Residential | 7 p.m. - 10 p.m. (Evening) | 50 |
Residential | 10 p.m. - 7 a.m. (Night) | 45 |
Commercial | 7 a.m. - 10 p.m. (Day and evening) | 65 |
Commercial | 7 p.m. - 7 a.m. (Night) | 55 |
Industrial | Anytime | 65 |
(2) Increases in the allowable exterior noise levels listed in Table 153.140.070 (C) may be permitted in accordance with the standards outlined in Table 153.140.070 (D).
Permitted Increases in Noise Levels | |
Permitted Increase (dbA) | Duration (cumulative minutes per 24 hour period) |
5 | 15 |
10 | 5 |
15 | 1 |
20 | Less than 1 minute |
(D) Interior noise standards.
(1) No person shall create or allow the creation of noise that causes the interior noise level when measured within any dwelling unit to exceed 45 dbA at any time.
(2) Increases in the allowable interior noise level may be permitted in accordance with the standards outlined in Table 153.140.070 (F).
Permitted Increases in Interior Noise Levels | |
Permitted Increase (dbA) | Duration (cumulative minutes per 24 hour period) |
5 | 1 |
10 | Less than 1 minute |
(E) Enclosed equipment. Utilization of compressors or other equipment, including, but not limited, to vents, ducts and conduits, but excluding window or wall-mounted air-conditioners, which are located outside of the exterior walls of any building, shall be enclosed within a permanent, noncombustible, view-obscuring enclosure to ensure that the equipment will not emit noise in excess of the ANSI standards.
(Ord. 1346, passed 5-2-12)