A Hybrid Multi-functions Digital Public Address System with Earthquake Early Warning

This paper proposes a hybrid infrastructure construction of multi-functions digital public address (PA) system, which consists of wired and wireless communications architecture. Wireless communications ability can be achieved by dedicated USB dongles such as WiFi, WiMax, 3G, and LTE. Wireless communication can be used for disaster areas or some regions where is difficult to install wired-based PA system. The proposed PA system is a complete all-in-one solution that is capable of broadcasting, environmental control, intercom, etc. Moreover, the proposed PA system can not only provide multi-functions broadcasting by single zone and groups, it can also support disaster warning abilities. Furthermore, currently, the proposed wired-partition PA system has also successfully integrated existing Earthquake Early Warning (EEW) system in many junior high and elementary schools in Taiwan, which EEW system was developed by the Central Weather Bureau (CWB), Taiwan.