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Attachment 4 <br />Adopted: August 15, 1983 <br />Amended: February 1, 1988 <br />A RESOLUTION AND ORDINANCE TO PROVIDE FOR THE CONTROL_ OF NAISE <br />IN ORANGE COUNTY <br />Pursuant to the authority provided in N.C. Gen, Stat. Section 153A-121, 153A- <br />123 and 153A-133, the Board of Commissioners of Orange County hereby resolves and <br />ordains as follows: <br />Article I: Definitions <br />In addition to the common meaning of words, the following definitions shall be <br />used in interpreting this ordinance. <br />(1) "A" weighting scale: The sound pressure level in decibels as measured with a <br />sound level meter using the "A" weighted network. The standard unit notation <br />is dB(A). <br />(2) dB A : Sound level in decibels determined by the "A" weighting scale of a <br />standard sound level meter having characteristics defined by the American <br />National Standards Institute (ANSI) Publication ANSI, S14-1971, <br />(3) Decibel: A unit of measure on a logarithmic scale, of the ratio of the <br />magnitude of a particular sound pressure to a standard reference pressure, <br />which for purposes of this ordinance shall be 20 micronewtons/meterz, <br />(4) Impact Noise: Sound that occurs intermittently rather than continuously, <br />(5) Sound Amplifying Equipment: Any device for the amplification of the human <br />voice, music or any other sound, including jukeboxes, stereos and radios. <br />(ti) Sound Level: In decibels, a weighted sound pressure level determined by the <br />use of a sound level meter whose characteristics and frequency weightings <br />are specified in the ANSI Standards, <br />(7) Sound Level Meter: Any instnament certified to meet or exceed ANSI <br />standards which includes an omni-directional microphone, an amplifier, an <br />output meter and frequency weighting network(s) for the measurement of <br />sound level. <br />(8) Sound Pressure Level: In decibels 20 times the logarithm to the base 10 of <br />the ratio of the magnitude of a particular sound pressure to the standard <br />reference pressure, The standard reference pressure is 20 <br />m i c ra n e wto n s/ m ete rz. <br />33 <br />G:\Adminislrative Div\DEBRA\Ordinances\Noise\Noise Ordinance doc 1 <br />