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点声源随距离的声衰减,可用式(1)求得 Ld=logr (1)式中:Ld点声源声随距离的衰减r距点声源的距离使用携带式计算机PC—2500按式(1)
Ld = logr (1) Where: Ld point source sound attenuation with distance r distance from the point of sound source using a portable computer PC-2500 according to equation (1)