... Passenger information system旅客信息系统 Public address system播音系统 Safety alarm systems安全警报系统 ...
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传统播音系统使用的大型扩音器中的椎体振动较为缓慢，使声音更加适合人类听觉范围。
The cones of larger loudspeakers used in traditional public-address systems vibrate more slowly, making them better suited for sounds in the range of human hearing.
一种可能性是有两个播音程序，一个关注Festival操作，另一个关注系统声音。
One possibility is to have two announcers, one focusing on verbal Festival operations and the other on system sounds.
产品主要应用于智能化小区，防盗报警，楼宇自控，可对讲视，闭路电视监控，广播音响，及远程抄表系统工程线缆。
Products are mainly used in intelligence community, anti-theft alarm, building automation can be as intercom, CCTV, radio, audio, and remote meter reading systems engineering cable.
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