Discussion on accuracy of prediction about sound level of noise from the road traffic related to asj model 1998

摘要

In order to maintain an environment as free from noise as possible, it is important to predict probable noise levels before highway construction begins. In this paper the errors between the predictional values, calculated using the ASJ model 1998 as the new prediction method, and the actual values are discussed. Various kinds of predictional errors are considered. The main errors arise from (1) traffic conditions, (2) condition of the road, (3) sound power level of noise from vehicles, (4) computational methods of sound propagation, (5) meteorological conditions, and (6) method of measuring the noise.