Abstract
It is the purpose of this paper to present the resultant effect of geometrical spreading, air absorption, Doppler frequency shift and the distortion of the sound field due to the motion of a line source. It is assumed that the source is moving slowly along a straight line. The results obtained can be used for prediction of the A-weighed sound pressure level of railway noise.References
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[2] American National Standard, Method for the calculation of the absorption of sound by the atmosphere, ANSI S1.26-1978, Acoustical Society of America, New York 1978.
[3] R. MAKAREWICZ, Air absorption of traffic noise, J. Sound and Vibration 160 (1993) in press.
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[6] R. MAKAREWICZ, Air absorption of motor vehicle noise, J. Acoust. Soc. Am. 80, 561-568 (1986).
[2] American National Standard, Method for the calculation of the absorption of sound by the atmosphere, ANSI S1.26-1978, Acoustical Society of America, New York 1978.
[3] R. MAKAREWICZ, Air absorption of traffic noise, J. Sound and Vibration 160 (1993) in press.
[4] G. WITTEK, Intensitat von Schallfeldern bewegten Punktstrahlen, Acustica, 45, 316-321 (1980).
[5] D.G. CRIGHTON, Scattering and diffraction of sound by moving bodies, . Fluid Mech. 72, 209-228 (1975).
[6] R. MAKAREWICZ, Air absorption of motor vehicle noise, J. Acoust. Soc. Am. 80, 561-568 (1986).
