背景音乐及消防紧急广播系统随着我国城市国际化发展趋势，宾馆、商厦、办公楼、智能化综合楼、机场、车站、ＢＧＭ及ＰＡ（背景音乐及公共广播）系统愈来愈必要，系统设计及使用者极为重视，她不仅构成优雅轻松的音响氛围，而且可以定向广播、呼叫播音，在多个区域同时分... Background music and fire emergency broadcasting system With the trend of the internationalization of our cities, the system design of hotels, commercial buildings, office buildings, intelligent buildings, airports, railway stations, BGM and PA (Background Music and Public Broadcasting) And users attach great importance, she not only constitutes an elegant and relaxed sound atmosphere, but also targeted broadcast, call broadcast, in multiple regions at the same time ...