This page has extensive graphics, please be patient. Students develop an acoustical model by setting up a geometrical model including a straight road section and 8 buildings and defining the calculation parameter. A 20 ft berm surrounding a city park is entered into the model. The noise contour graphic identifies the areas with no and with traffic noise reductions. The effectiveness of the berm changes dramatically with increasing distance to the road and to the berm.
Students generate graphics based on horizontal and vertical noise contour maps.
Fans on top of the chiller are defined as point sources. All walls are defined as area sources. The sources are entered with spectral sound power level data.