Diffraction Of Sound Around Barriers: Comparison Between Procedures Of
Forecasting In Sound Propagation In A Quarry
Author(s)
G.Alfaro Degan, E.Sarri & M.Pinzari
Abstract
Diffraction of sound around barriers:
comparison between procedures of forecasting
in sound propagation in a quarry.
G.Alfaro Degan, E-Sarri & M.Pinzari
Department of Mechanical and Industrial Engineering,
Roma TRE University, Italy
Abstract
The aim of this work is to compare the accuracy of numerical previsions of
sound propagation in a quany obtained with different algorithms with particular
attention to the diffracted waves over barriers. Comparison is between the IS0
96 13 Standard "Attenuation of sound during propagation outdoors", a new
simplified algorithm based on the Huyghens principle, a pyramid beam tracing
method. The IS0 96 13 (parts 2) Standard proposes a method taking into account
the meteorological conditions (K,,,,,). It also takes into account the effects caused
by the propagation over soil with varying properties, shielding both from thin
and thick obstacles as well as the effects of vegetation layers and excess
attenuation. The new algorithm simplifies IS0 codes proposing a
Keywords
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