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A. No person shall cause or permit sound to intrude onto the real property of another person which exceeds the maximum permissible sound levels established by this chapter. The point of measurement shall be at the property boundary of the receiving property or anywhere within.

B. For sound sources located within the city, the maximum permissible sound sources are as follows:

Maximum Permissible Sound Levels by Receiving Property

EDNA of Noise Source

EDNA of Receiving Property

Class A (dBA)

Class B (dBA)

Class C (dBA)

Class A

55

57

60

Class B

57

60

65

Class C

60

65

70

C. Modifications to maximum permissible sound levels are as follows:

1. Reduce by 10 dBA, nights, 10:00 p.m. to 7:00 a.m., for receiving property in Class A EDNAs; and

2. Reduce by five dBA for impulsive or pure tone sounds for any receiving property at any time; and

3. Increase for short duration for any receiving property at any time:

a. Increase by five dBA for 15 minutes in any one-hour period; or

b. Increase by 10 dBA for five minutes in any one-hour period; or

c. Increase by 15 dBA for one and one-half minutes in any one-hour period; and

4. Increase by 10 dBA for the operation of sound amplification equipment operated in compliance with a permit issued pursuant to BCC 9.18.045A.

D. If the measurements of sound are made with a sound level meter, the instrument shall be in good operating condition and shall meet the requirements for a Type I or Type II instrument, as described in American National Standards Institute Specifications as now exist or as hereafter amended or modified. If the measurements are made with other instruments, or assemblages of instruments, the procedure must be carried out in such manner that the overall accuracy shall be at least that called for in the National Standards Institute Specifications.

E. Where a receiving property lies within more than one EDNA, the maximum permissible sound level shall be determined by the most noise-sensitive EDNA. (Ord. 6657 § 3, 2022; Ord. 5719 § 6, 2007; Ord. 4241 § 5, 1991; Ord. 3491 § 1, 1985.)