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ABOUT THE MAP. This map shows the exterior levels of noise created by aircraft operations at John Wayne Airport. California Building <br />Code (Title 21) standards states that the basis for the acceptable level of aircraft noise for persons living in the vicinity of airports Is 65 <br />decibels (dBA CNEL. <br />I <br />y I <br />Warner Ave P <br />3 <br />LL N I <br />Segerstrom Ave � Dyer Rd <br />� Alton Ave , I g <br />/a l <br />_ a� <br />v a <br />l MacArthur Blvd <br />55 q�ro <br />0 <br />Santa Ana Airport 2012 Annual Noise Contours <br />60 dBA CNEL <br />65 dBA CNEL <br />- 70 dBA CNEL <br />- 75 dBA CNEL <br />IRVINE <br />BO dBA s <br />'CNEL - <br />1 <br />NEWPORT BEACH <br />i L—._IMiles <br />0 0.5 1 <br />800aeAttrealvd hart Orange County Airport Lantl Use Canmissim, Dale Mfimed: 9/20/20H <br />NroW Ewimas Lad Ilse Plan tar Santa An Avpo , 2008. <br />Community Noise Equivalent Level (CNEL): The energy -average of the sound levels <br />during a 24-hour pedad, with 5 decibels (dB) added to the levels from 7:00 pm to 10:00 <br />pm and 10 dB added from 10:00 pm to 7:00 am. The decibels are measured in terms of <br />relatives loudness as perceived by the human ear, referred to as A -weighted decibels (dBA). <br />FIGURE N-3 <br />AIRPORT NOISE CONTOURS <br />CITY OF SANTA ANA GENERAL PLAN �a pp .N„•• <br />