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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...
This paper proposes a digital public address (PA) system which is capable of multi-zone and text-to-speech (TTS) broadcasting functions for campus broadcasting and language listening training/exam. The proposed digital PA system can achieve environmental broadcasting requirement which means different broadcasts for different zones at the same time. On the other hand, it cannot cause noise to other...
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