Outdoor stand alone type is in broadcast sound reinforcement system

摘要

PROBLEM TO BE SOLVED: To provide a novel and useful outdoor stand-alone type broadcasting public-address system that can be easily installed as an outdoor stand-alone type by utilizing an existent receiver such as a house-to-house receiver of disaster prevention administration radio.SOLUTION: In the system, a battery 19 that utilizes a solar panel, an external public-address amplifier 25, a speaker 31 for public-address broadcasting of an audio signal amplified by the external public-address amplifier 25 and a control box 7 are attached to a pole that is set up on the ground. A receiver 45 is accommodated in the control box 7 together with a control board 37. The receiver 45 is being on standby silently and, when an audio signal is received, utilizes the signal to drive/stop the external public-address amplifier 25. The battery is utilized as an independent power source, and regarding broadcasting that is received by the receiver 45, public-address broadcasting is automatically performed from the speaker 31. The system can be easily constructed regardless of the type of the receiver 45.SELECTED DRAWING: Figure 5