Wf. Cheng et al., The theoretical model to optimize noise barrier performance at the window of a high-rise building, J SOUND VIB, 238(1), 2000, pp. 51-63
This paper attempts to design the horizontal noise barrier near the window
at the building facades. Previous results have showed that the insertion lo
ss by the barrier declines for the occurrence of reflection. In this paper,
some remedial measures have been studied using the theoretical prediction
by Macdonald's and the image receiver theory. The theoretical model results
were verified by the scale models tests. By designing an absorptive top sc
reen using the theoretical models, an insertion loss of 17 dB at a frequenc
y of 500 Hz, 20 dB, at a frequency of 1000 Hz and 25 dB and at frequency of
2000 Hz could be obtained. Such performances are higher than the previous
windows screens and are comparable with tall barriers or partial enclosures
on the roadside. This is particularly useful in high-rise buildings when t
all barriers cannot be built. (C) 2000 Academic Press.