The measurement procedure presented in this Section assumes that personnel performing the noise measurements have been trained in the use of the instruments and in interpretation of measured data. Upon receipt of a complaint from a citizen, an agent of the City, equipped with sound level measurement equipment satisfying the requirements specified in Section 9.110.020, shall investigate the complaint. The investigation shall consist of a measurement and the gathering of data to adequately define the noise problem, and shall include the following:
A. Nonacoustic Data.
1. Type of noise source.
2. Location of noise source relative to complainant's property.
3. Time period during which noise source is considered by complainant to be intrusive.
4. Total duration of noise produced by noise source.
5. Date and time of noise measurement survey.
B. Procedure. Utilizing the A-weighting scale of the sound level meter and the slow meter response, the noise level shall be measured at a position or positions along the complainant's property line closest to the noise source or at the location along the offending property’s boundary line where the noise level is at a maximum. In general, the microphone shall be located five feet (5') above the ground and ten feet (10') or more from the nearest reflective surface, where possible. However, in those cases where another elevation is deemed appropriate, the latter shall be utilized. If the noise complaint is related to interior noise levels, interior noise measurements shall be made at a point at least four feet (4') from the wall, ceiling, or floor nearest the noise source with windows in the normal seasonal configuration. Calibration of the instrument being used shall be performed immediately prior to and following the recording of any noise data utilizing the acoustic calibrator.
[Ord. No. 631, 7/13/22.]