<div class="chunk-title">Sec. 30-29. - Measurement techniques.</div>
<div class="chunk-content">
            <p class="incr0">
               (a)
               </p>
            		
            <p class="incr_ml1">
               (1)
               </p>
            		
            <p class="content2">
               Except for noise within multi-family or multi-tenanted structures, noise measurements
               shall be made 50 feet from the structure or instrumentality emitting the noise complained
               of, but when the measurement 50 feet away is not practical, noise measurements may
               be made at the boundary of the public right-of-way which adjoins the complaining property.
               The noise measurements shall be made at a height of at least four feet above the ground
               and at a point approximately ten feet away from walls, barriers and obstructions (trees,
               bushes and the like) on a sound level meter operated on the "A" weighting network
               (scale).
               </p>
            		
            <p class="incr1">
               (2)
               </p>
            		
            <p class="content2">
               In the case of noises within multi-family or multi-tenanted structures, noise measurements
               shall be made in the complaining unit at a height of at least four feet above the
               floor or in the common area nearest the unit from which suspect sound is emanating
               and at a point approximately equidistant from all walls on a sound level meter operated
               at the "A" weighting network (scale).
               </p>
            		
            <p class="incr0">
               (b)
               </p>
            		
            <p class="content1">
               No individual other than the operator shall be within ten feet of the sound level
               meter during the sample period.
               </p>
            		
            <p class="incr0">
               (c)
               </p>
            		
            <p class="content1">
               Sound measurements shall be conducted at that time of day or night when the suspect
               noise source is emitting sound.
               </p>
            		
            <p class="incr0">
               (d)
               </p>
            		
            <p class="content1">
               The sound level measurement shall be determined as follows:
               </p>
            		
            <p class="incr1">
               (1)
               </p>
            		
            <p class="incr_ml2">
               a.
               </p>
            		
            <p class="content3">
               Calibrate the sound level meter within one hour before use;
               </p>
            		
            <p class="incr2">
               b.
               </p>
            		
            <p class="content3">
               Set the sound level meter on the "A" weighted network at slow response; and
               </p>
            		
            <p class="incr2">
               c.
               </p>
            		
            <p class="content3">
               Set the omni-directional microphone in an approximately 70 degree position in a location
               which complies with subsections (d)(1)a. and b. above. The operator of the sound level
               meter shall face the noise source and record the meter's instantaneous response (reading)
               observed at consecutive ten-second intervals until 20 readings are obtained.
               </p>
            		
            <p class="incr1">
               (2)
               </p>
            		
            <p class="content2">
               Recalibrate the sound level meter after use.
               </p>
            		
            <p class="incr0">
               (e)
               </p>
            		
            <p class="content1">
               It shall be unlawful for any person to interfere, through the use of sound or otherwise,
               with the taking of sound level measurements.
               </p>
            		
            <p class="historynote0">
               (Res. of 11-4-13, Â§ 30-34)
               </p></div>