Urbanization and development are increasing environmental problems, such as noise and vibration, causing bad effects on the daily lives of people. Thus one of the key items to be examined in evaluating the effect of planned production facilities before they are actually developed is the effect in noise pollution and vibration. The present work is an attempt to evaluate, using a numerical simulator, the harm caused by noise emanating from automobiles. The report describes the method used and gives an example of a resultant noise contour map.