Abstract
A series of field measurement was conducted in order to investigate the effect of wind on sound propagation. Two sound level meters and a speaker are aligned on a straight line. The distances of each sound level meter from the speaker are 60m and 100m. The frequencies of the sound sources are 100Hz, 400Hz, 1000Hz and 4000Hz. An aerovane anemometer is deployed in the vicinity of the speaker. From the measured data, it is recognized that: the gap of the sound pressure levels of the two observation points become large as the wind velocity become high; the gap become larger as the sound level meters become far from the speaker; and the higher frequency sound reveals larger gap rate.
