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ORDINANCE NO. NS-1441 PAGE THREE Section 18-310. Noise Level Measurement Criteria Any noise level measurements made pursuant to the provisions of this article shall be performed using a sound level meter as defined in section 18-309. Section 18-311. Designated Noise Zone The entire City of Santa Ana is hereby designated as "Noise Zone 1." Section 18-312. Exterior Noise Standards (a) The following noise standards, unless otherwise specifically indicated, shall apply to all residential property within a designated noise zone: NOISE STANDARDS Noise Zone Noise Level Time Period 55 dB(A) 7:00 a.m.- 10:00 p.m. 50 dB(A) 10:00 p.m.- 7:00 a.m. In the event the alleged offensive noise consists entirely of impact noise, simple tone noise, speech, music, or ahy combination thereof, each of the above noise levels shall be reduced by five (5) dB(A). (b) It shall be unlawful for any person at any location within the City of Santa Aha to create any noise, or to allow the creation of any noise on property owned, leased, occupied, or otherwise controlled by such person, when the foregoing causes the noise level, when measured on any other residential property, to exceed: (1) The noise standard for a cumulative period of more than thirty (30) minutes in any hour; or (2) dB(A) than The noise standard plus five (5) for a cumulative period of more fifteen (15) minutes in any hour; or (3) dB(A) than The noise standard plus ten (10) for a cumulative period of more five (5) minutes in any hour; or (4) (15) more The noise standard plus fifteen dB(A) for a cumulative period of than one (1) minute in any hour; or (5) The noise standard plus twenty (20) d~.(A) for any period of time.