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9-1025.9 <br /> I �10mg <br /> LAOIS ANDt> ND US COMPATIBUATY-SICANDARD& <br /> EOR:INDUTRTA1 -ANI}'COhIIti1EKC LVOLSE:SOIIRCES"� `�` _ <br /> CUMULATIVE DURATION EXTERIOR NOISE LEVEL STANDARDSZ <br /> OF NOISE EVENT` <br /> (NUNUTES) DAYTEME'j NIGH17IME44 <br /> 30 50 45 <br /> 15 55 50 <br /> 5 I 60 55 <br /> 1 65 60 <br /> 0 70 I 65 <br /> Cumulative duration refers to time within any one-hour period. <br /> Noise level standards measured in dB's. <br /> ' Daytime = Hours between 7:00 a.m, and 10:00 p.m. <br /> ' Nighttime = Hours between 10:00 p.m. and 7:00 a.m. <br /> s Each of the noise level standards specified may be reduced by 5 dB for tonal noise (i.e.. a signal which <br /> i has a particular and unusual pitch) or for noises consisting primarily of speech or for recurring impulsive <br /> noises (i.e., sounds of short duration, usually less than one second, with an abrupt onset and rapid decay <br /> such as the discharge of firearms). i <br /> (Ord. 3675) <br /> -16- <br />