§ 91.18 SOUND LEVELS BY RECEIVED LAND.

   (A)   Maximum permissible sound levels by receiving land use. No person shall operate or cause to be operated on private property any source of sound in such a manner as to create a sound level which exceeds the limits set forth for the receiving land use category in Table 2 when measured at or within the property boundary of the receiving land use. These maximum permissible sound levels are Leq: dB(A) values measured in accordance with the guidance provided in this section.

Table 1. Octave Bands Defined
Frequency Range	Geometric Mean (or Center Frequency) of Octave Band
22-44	31.5
44-88	63
88-177	125
177-355	250
355-710	500
710-1420	1000
1420-2840	2000
2840-5680	4000
5680-11360	8000

 

Table 2. Sound Levels by Receiving Land Use
Land Use Category	Time	Maximum Permissible Sound Level Leq : dB(A)
A (noise sensitive zones)	At all times	55
**B (residential)	10:00 p.m. - 7:00 a.m.	55
	7:00 a.m. - 10:00 p.m.	60
C (Commercial)	10:00 p.m. - 7:00 a.m.	60
	7:00 a.m. - 10:00 p.m.	65
D (Industrial)	At all times	65

 

**From Friday 10:00 p.m. to Sunday 10:00 p.m. Residential Districts will be considered Noise Sensitive Zones. The maximum decibel level allowed is 55 at all times.

   (B)   Correction for character of sound. For any source of sound which emits a pure tone or impulsive sound, the maximum sound level limits set forth in § 91.18(A) shall be reduced by 3 dB(A). In addition, octave band frequency limits in dB as established in Table 3 (daytime) and Table 4 (nighttime) shall not be exceeded.

Table 3. Maximum Permissible Limits By Octave Band if Pure Tones Exist (Daytime)
Octave Band Center Frequency	A Noise Sensitive Zones	B **Residential	C Commercial	D Industrial
31.5	72	75	80	80
63	71	74	78	78
123	65	67	73	73
250	57	63	67	67
500	51	56	61	61
1000	45	51	56	56
2000	39	47	52	52
4000	34	45	48	48
8000	32	40	45	45

 

**Residential Districts shall be Noise Sensitive Zones from 10:00 p.m. Friday to 10:00 p.m. Sunday.

Table 4. Maximum Permissible Limits by Octave Band if Pure Tones Exist (Nighttime)
Octave Band Center Frequency	A Noise Sensitive Zones	B **Residential	C Commercial	D Industrial
31.5	72	72	75	80
63	71	71	74	78
123	65	65	67	73
250	57	57	63	67
500	51	51	56	61
1000	45	45	51	56
2000	39	39	47	52
4000	34	34	45	48
8000	32	32	40	45

 

**Residential Districts shall be Noise Sensitive Zones from 10:00 p.m. Friday to 10:00 p.m. Sunday.

(Ord. 1218, passed 11-2-06) Penalty, see § 91.99(E)