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交流嗓声干扰的产生 音响系统的噪声干扰除设备和传输线路本身的热噪声和叠加在其上的连续性“白噪声”外,干扰源主要可分为脉冲干扰及交流噪声干扰两大类。脉冲干扰是由于脉冲器件产生的强电磁场耦合进入信道所致:电机、空调、汽车发动机火花塞点火、开关电源和控制灯光的硅柜均会产生60Hz～2MHz的干扰,这些干扰的谐波分量会落入音频频带内:闪电、宇宙噪声还会产生2kHz～100MHz的脉冲噪声。交流噪声干扰主要是由于地线系统不同接地点间存在电位差,使地电流形成回路造成的;高压输电线路和交流电气化铁路也会引起交流噪声干扰,交流电气化
Interference with noise interference Sound system noise interference In addition to equipment and transmission line itself thermal noise and superimposed on its continuity, “white noise”, the interference can be divided into pulse interference and AC noise interference in two broad categories. Pulse interference is due to strong electromagnetic field generated by the pulse device coupling into the channel due to: motor, air conditioning, automotive engine spark plug ignition, switching power supply and control of light silicon cabinet will produce 60Hz ~ 2MHz interference, the harmonic components of these interference will fall Into the audio frequency band: Lightning, cosmic noise will produce 2kHz ~ 100MHz impulse noise. The interference of AC noise is mainly caused by the potential difference between different ground points of the ground system, which causes the ground current to form a loop. High voltage transmission lines and AC electrified railway also cause the interference of AC noise. The AC electrification