紧急警报广播系统是一种通过常用的广播装置提供重大而紧急通知的系统,如预告造成巨大损害的地震或海啸等。在警报灾害的紧急广播开始之前,系统发射信号并自动激励警报接收器。这样警报声就从扩音器中传出,唤起人们的注意。从1965年起已提出并研制成各种装置和设备。1980年,日本广播协会(NHK)、日本电视公司(NTV)、东京广播公司(TBS)和Kokusai电气公司 The emergency alert broadcasting system is a system that provides major and emergency notifications through commonly used broadcast devices, such as earthquakes or tsunamis that cause great damage. The system emits a signal and automatically activates the alarm receiver before the emergency broadcast of the alarm disaster starts. This alarm sounds from the megaphone, evoking people’s attention. Since 1965, various devices and equipment have been proposed and developed. In 1980, NHK, NTV, Tokyo Broadcasting Corporation (TBS) and Kokusai Electric Company