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6/6/2016 Indian River County, FL Code of Ordinances Level L(10). That noise (A -weighted sound level) exceeding ten (10) percent of a measurement time equivalent to at least fifteen (15) minutes. Level L(50). That noise (A -weighted sound level) exceeding fifty (50) percent of a measurement time equivalent to at least fifteen (15) minutes. *Residential developments within Agricultural Zoning Districts shall be subject to the decibel level thresholds for the "Residential" Zoning Districts. (3) If the noise occurs at anytime on Sunday or holidays, the decibel level applicable between 10:00 p.m. and 6:00 a.m. shall prevail. (4) Noise levels shall not exceed the peak noise levels, independent of time duration, set out in Table II below: TABLE II. PEAK NOISE LEVELS ZoningDistrict (dBA) I Sound Level in Decibels A -Scale Conservation 75 Residential 80 Commercial 85 Industrial 85 Agricultural 85 (5) For noise of impulsive character (hammering, etc.), the permissible decibel levels set out in Table I shall be corrected by subtracting five (5) decibels. Impulsive sound is any sound of short duration, usually less than one second with an abrupt onset and rapid decay, e.g. explosions and blasting. (Ord. No. 90-16, § 1, 9-11-90; Ord. No. 2011-008, § 2, 9-13-11) Section 974.06. - Exemptions. The following noises or vibrations shall be exempt from the restrictions set forth in the other sections of this chapter. (1) Noises of authorized safety signals and warning devices; (2) Noises resulting from any authorized emergency vehicle, when responding to an emergency call or acting in time of emergency or any other public safety operation; (3) Attachment 12 httpsJMrwwZmunicode.comAibrarytflAndian river county/codes/Code of ordinances?nodeld=COOR TrrDQADERE CH974NO\AC0 516 208