用和实际噪声源(振源)反相的二次声源产生声,进行干涉,来减小甚至抵消噪声,这不是一个新鲜事,原理也不复杂。但具体实现却取决于声源(振源)的尺寸,辐射分布和抵消场的产生与控制。近期的进展是以控制论和自适应滤波的最新发展和用于自适应信号处理的高速微电子线路的出现为基础的。 Using a secondary sound source that is in phase opposition to the actual noise source (vibration source) produces sound and interferes to reduce or even cancel the noise, which is not new and the principle is not complicated. However, the actual implementation depends on the size of the sound source (vibration source), the distribution of radiation and the generation and control of the field. Recent developments are based on the latest developments in cybernetics and adaptive filtering and the advent of high-speed microelectronic circuits for adaptive signal processing.