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Project Name:TheAddington <br />Job Number:11177 <br />Analyst:B. Lawson <br />Source:Roof-Top Parking <br />441.0 <br />NOISE MODEL INPUTS <br />Noise Distance to Barrier: <br />601.0Noise Distance to Observer <br />feet <br />feet <br />Noise Source Elevation:40.0 <br />Observer Elevation:0.0 feet <br />feet <br />Barrier Height:6.0 <br />Noise Source Height:5.0 feet <br />feet <br />Drop Off Coefficient:15.0 <br />20 = 6 dBA per doubling of distance <br />15 = 4.5 dBA per doubling of distance <br />160.0Barrier Distance to Observer:feet <br />Barrier Type (0-Wall, 1-Berm):0 <br />Leq LmaxL50 <br />68.644.0 <br />L25 <br />47.0 <br />L2 <br />61.0 <br />L8 <br />55.00.0 <br />Noise Level <br />NOISE MODEL PROJECTIONS <br />Distance (feet) <br />10.0Reference (Sample) <br />-26.7-26.7 -26.7 -26.7-26.7-26.7601.0Distance Attenuation <br />34.09.4 12.4 26.420.4-34.6 <br />441.0Shielding (Barrier Attenuation)-7.9-7.9 -7.9 -7.9-7.9-7.9 <br />Raw (Distance + Barrier) <br />Observer Height:5.0 feet <br />Observer Location:R1 <br />34.09.4 12.4 26.420.4-34.660 <br />Condition:Operational <br />Barrier Elevation:0.0 feet <br />Minute Hourly Adjustment <br />STATIONARY SOURCE NOISE PREDICTION MODEL 10/7/2019 <br />Project Name:TheAddington <br />Job Number:11177 <br />Analyst:B. Lawson <br />Source:Air Conditioning Unit (Roof-Top) <br />215.0 <br />NOISE MODEL INPUTS <br />Noise Distance to Barrier: <br />218.0Noise Distance to Observer <br />feet <br />feet <br />Noise Source Elevation:50.0 <br />Observer Elevation:0.0 feet <br />feet <br />Barrier Height:4.0 <br />Noise Source Height:5.0 feet <br />feet <br />Drop Off Coefficient:20.0 <br />20 = 6 dBA per doubling of distance <br />15 = 4.5 dBA per doubling of distance <br />3.0Barrier Distance to Observer:feet <br />Barrier Type (0-Wall, 1-Berm):0 <br />Leq LmaxL50 <br />78.274.4 <br />L25 <br />76.1 <br />L2 <br />77.7 <br />L8 <br />77.40.0 <br />Noise Level <br />NOISE MODEL PROJECTIONS <br />Distance (feet) <br />5.0Reference (Sample) <br />-32.8-32.8 -32.8 -32.8-32.8-32.8218.0Distance Attenuation <br />26.422.6 24.3 25.925.6-51.8 <br />215.0Shielding (Barrier Attenuation)-19.0-19.0 -19.0 -19.0-19.0-19.0 <br />Raw (Distance + Barrier) <br />Observer Height:5.0 feet <br />Observer Location:R2 <br />24.520.7 22.4 24.023.7-53.739 <br />Condition:Operational <br />Barrier Elevation:50.0 feet <br />Minute Hourly Adjustment <br />STATIONARY SOURCE NOISE PREDICTION MODEL 10/7/2019 <br />2-200