Sound Barrier You are here:  Home >?Sound Barrier
A sound barrier is an obstacle placed between a sound source and a receiver which interrupts the path of the noise. It's always made of sound absorption or sound insulation materials. The sound wave propagates in the air, but when it hits the sound barrier, reflection, transmission and diffraction phenomenon will take place. So there will be an acoustic shadow behind the sound obstacle. In this region, the propagation of the sound wave has a significant additional attenuation resulting in preventing the noise effects on receivers in a certain area.
9 Records 1/1 Page
免费炸金花棋牌游戏 长沙麻将留牌技巧 海龙王捕鱼最新版官网 陕西11选5预测免费推荐 欢乐棋牌app网址 京威股份股票 浙江11选五玩法二拖六 澳洲快乐8开奖软件 海南4十1彩票中奖规则 福彩开奖公告 加拿大快乐8开奖参考