Abstract
In our privious paper, noises emitted by random point sources were studied in several cases. Noise sources such as a train, a car etc. , however, are more realistic to regard as line or surface sources than to regard as point sources. Noises emitted by a random line source with finite or infinite length were studied in this paper. The line source subject to the stationary random process is fixed in space or in motion with a constant velocity. Space and time correlation and the mean square value of the radiated sound were obtained by using an auto-correlation function and power spectrum of the source for the following cases. (1)Each point on the line source behaves in the same way. (2)Each point on the line source quite independently. (3)Behavior of each point on the source is transmitted with a constant velocity along the source. It has been confirmed that the radiated sound field is greatly influenced by the difference in correlation between behaviors of points on the line source. This study is considered to give some basic information on propagation of noises from a random line source.
