The design of inclined barrier in high-rise residents

Abstract

The objective of this study is to develop a scale model to analyze the performance of the inclined barrier design. A computer program was used to outline the zone of noise variation with the tilted angle of a barrier. The results of this study show that the average noise level at lower receivers behind the nearside barrier could be reduced by 4dB and 10dB for 125Hz and 500Hz respectively by tilting the angle of the farside barrier by over 10 degree. This result seems to be sufficient to counteract the reflected noise problems at lower receivers. It is also noted that degradation is smaller for low frequency. The simple image source and virtual barrier model computer program can help us to locate the critical reflection zone with different tilted angles of the barriers.