Abstract
In this paper, the relationship between the sound level (measured in dB(A)) and the distance was derived on the assumption that air absorption is the only essential factor affecting noise propagation. It was shown that at a great distance from the source "rapid sound level drop", exceeding 6 dB(A), occurs when the distance is doubled.References
[1] American National Standard, ANSI SI. 26, 1978.
[2] K. ATTENBOROUHG, Predicted ground effect for highway noise, Journal of Sound and Vibration, 81, 413-424 (1982).
[3] J. BARTKOWIAK, Sound absorption coefficient in the air (in Polish), M. Sc. Thesis, Institute of Acoustics, Adam Mickiewicz University, Poznań, 1985.
[4] T. F. EMBLETON, J. E. PIERCY, N. OLSON, Outdoor sound propagation over ground of finite impedance, J. Acoust. Soc., Am., 59, 276-277 (1976).
[2] K. ATTENBOROUHG, Predicted ground effect for highway noise, Journal of Sound and Vibration, 81, 413-424 (1982).
[3] J. BARTKOWIAK, Sound absorption coefficient in the air (in Polish), M. Sc. Thesis, Institute of Acoustics, Adam Mickiewicz University, Poznań, 1985.
[4] T. F. EMBLETON, J. E. PIERCY, N. OLSON, Outdoor sound propagation over ground of finite impedance, J. Acoust. Soc., Am., 59, 276-277 (1976).
