1声音的几个特性声音在传播的过程中,遇到障碍物时,只要障碍物的尺寸大于或近似等于声波的波长时,就会产生反射而改变它的传播方向。部分声波则会绕过障碍物的边缘进行传播,而声波在通过小孔时,是趋向于均匀地扩散,这就是声音的绕射。对于频率越高的声音,声绕射不会轻易地产生,它传播辐射的指向性就会越强;而频率越低的声音,由于声绕射的作用,障碍物 A sound of several characteristics of sound in the process of communication, encountered obstacles, as long as the size of the obstacle is greater than or approximately equal to the wavelength of sound waves, it will produce reflections and change its propagation direction. Part of the sound wave will be around the edge of obstacles to spread, while the sound waves through the hole, it tends to spread evenly, this is the sound diffraction. For the more frequent the sound, the sound diffraction will not be easily generated, it will be more radiation directivity; and the lower the frequency of sound, due to the role of acoustic diffraction, obstacles