Scale modelling of sound propagation in a city street canyon

Acoustic scale modelling is used to study sound propagation in a city stree t canyon. The acoustic performance of several noise abatement schemes is in vestigated at various receiver heights for noise fields produced by differe nt categories of vehicles travelling in the two lanes. The results are disc ussed in terms of the attenuation rate predicted along the canyon and the i nsertion loss. It is shown that although the effects produced by complex no ise abatement schemes are significant they cannot be predicted by simple ad dition of the effects from the individual components of the schemes. (C) 19 99 Academic Press.