Laserfiche WebLink
Project Name:TheAddington <br />Job Number:11177 <br />Analyst:B. Lawson <br />Source:Roof-Top Parking <br />315.0 <br />NOISE MODEL INPUTS <br />Noise Distance to Barrier: <br />332.0Noise 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 />17.0Barrier 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 />-22.8-22.8 -22.8 -22.8-22.8-22.8332.0Distance Attenuation <br />40.515.9 18.9 32.926.9-28.1 <br />315.0Shielding (Barrier Attenuation)-5.3-5.3 -5.3 -5.3-5.3-5.3 <br />Raw (Distance + Barrier) <br />Observer Height:5.0 feet <br />Observer Location:R3 <br />40.515.9 18.9 32.926.9-28.160 <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 />161.0 <br />NOISE MODEL INPUTS <br />Noise Distance to Barrier: <br />164.0Noise 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 />-30.3-30.3 -30.3 -30.3-30.3-30.3164.0Distance Attenuation <br />28.925.1 26.8 28.428.1-49.3 <br />161.0Shielding (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:R4 <br />27.023.2 24.9 26.526.2-51.239 <br />Condition:Operational <br />Barrier Elevation:50.0 feet <br />Minute Hourly Adjustment <br />STATIONARY SOURCE NOISE PREDICTION MODEL 10/7/2019 <br />2-207