打电话时,从电话机中常可听到广播电台的播音,有时听到的声音竟大到与通话音量同一数量级,甚至使话音淹没在广播声中。电话机简直成了一台“收音机”。形成这种现象,多半有以下几个原因:一是电话线附近有平行架设的有线广播线。当有线广播正在转播电台播音时,播音信号就从广播线经过电磁耦合感应到电话线上,使电话机听到电台播 When you make a phone call, you can often hear radio broadcasts from your telephone. Sometimes you hear voices that are as much as the volume of the call, or even make the voice submerged in the radio. The phone just became a “radio”. The formation of this phenomenon, mostly for the following reasons: First, there are parallel cable telephone lines set up near the cable line. When a cable broadcast is being broadcast on the radio, the broadcast signal is sensed from the broadcast line through electromagnetic coupling to the telephone line, causing the telephone to hear the radio