5. Sound Pressure Level Projections
5.1 Modeling Parameters The results of the analysis from the previous chapter will now be used as input parameters for an acoustical model of the area surrounding the pickleball courts. The model has been constructed using the iNoise package version 2020.0 developed by DGMR. The sound propagation model is ISO 9613. Each pickleball court has been modeled as a point source with directional characteristics giving the sound pressure level contours an oblong shape. These are displayed as red asterisks in the figures. The source height is four feet. The sound pressure levels are calculated from the mean sound exposure levels using 11.6 paddle impacts per minute for each court. In accordance ANSI S12.9 Part 4, a 12 dB adjustment has been added to the measured paddle impact sound pressure levels to compensate for the increased noise impact of highly impulsive sound. The clubhouse building and the small walled area next to Myrtle Drive have been included in the model. The ground is considered to be hard. The height of the noise contour grid is five feet above grade. 5.2 Existing Conditions Figure 5.1 shows the current sound pressure levels produced by the Foam Quiet ball. Note that area inside the 55 dBA contour does not extend across Myrtle or Maple Drives, but does include the RV slots opposite Satinloaf Drive and the pool area. The clubhouse is an effective shield to the north.
29 of 58 Spendiarian & Willis Acoustics & Noise Control LLC
12/15/2019
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