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7.A. - Page 33 of 38 <br />RESIDENTIAL DISTRICT: The RH, R-1, R-2, RG, R-3, R-4, R-5 and MH Zoning <br />Districts as designated and defined in Ordinance No. 1130, as amended, the Redwood <br />City Zoning Ordinance. <br />SOUND LEVEL (expressed in decibels (dB)): The logarithmic indication of the ratio <br />between the acoustic energy present at a given location and the lowest amount of <br />acoustic energy audible to sensitive human ears and weighted by frequency to account <br />for the characteristics of human hearing, as set forth in the American National <br />Standards Institute Standard S1.1, Acoustic Terminology, paragraph 2.9, as said <br />reference may from time to time be amended, revised or superseded. All references to <br />dB in this Chapter utilize the A-level weighting scale, abbreviated CIBA, measured as <br />set forth in this Section. <br />ATTY/ORD.500/CC ORDINANCE AMENDNG CONSTRUCTION NOISE REGULATIONS <br />REV: 11-19-19 RL <br />Page 4 of 6 <br />308 <br />