英国国立农业工程研究所设计了一种噪声抵消系统,它不用普通的隔声或封闭方法,而是以计算机为基础设计的。其工作原理是由噪声抵消系统产生一种声音,恰好与噪声的相位相反,使两个相位的声波相互 The National Institute of Agricultural Engineering designed a noise cancellation system that uses a computer-based design instead of the usual acoustic or containment method. The working principle of the noise cancellation system is to produce a sound, just the opposite phase with the noise, the two phases of the sound waves of each other