SOUND AMPLIFIER ACTIVATION DEVICE, SOUND-INCREASING AMPLIFIER, AND REMOTE BROADCAST SYSTEM

摘要

A remote broadcast system according to the present invention has a sound amplifier activation device which turns on the sound amplifier when the level of a sound input inputted from a smartphone slave unit exceeds a threshold, and which turns off the sound amplifier when the state where the level of a voice input for outputting broadcast voice signals obtained by amplifying the inputted sound signals to a broadcast speaker is maintained at less than the threshold for a predetermined time period. A broadcaster can select smartphone slave stations from a smartphone master unit to connect communication lines between the smartphone master unit and the smartphone slave stations. This enables the broadcaster to broadcast escape guidance during an evacuation.