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1. 发明申请

WO2013186823A1 PUBLIC ADDRESS SYSTEM AND CONTROL DEVICE FOR PUBLIC ADDRESS SYSTEM 审中-公开
标题翻译：公共地址系统和公共地址系统的控制装置
公开(公告)号：WO2013186823A1
公开(公告)日：2013-12-19
申请号：PCT/JP2012/003947
申请日：2012-06-15
申请人： TOA CORPORATION , JONAN, Tomohiro , IKOMA, Tsuneo
发明人： JONAN, Tomohiro , IKOMA, Tsuneo
IPC分类号： H04R27/00 , H04R29/00
CPC分类号： H04R29/007 , H04R27/00
摘要： The public address system 1 comprises a transmission medium 4 having a loop shape and a plurality of loudspeakers 3. The transmission medium 4 transmits a transmission signal therethrough in a first direction and in a second direction opposite to the first direction. The transmission signal includes a communication signal having a predetermined frequency range and an audio signal having a different frequency range than the communication signal. The public address system 1 further comprises a first filter unit 51 connected to the transmission medium 4 that is configured to filter the transmission signal to attenuate the communication signal and output the audio signal. The first filter unit 51 is connected to the transmission medium 4 such that the communication signal is prevented from transmission in the first direction while the communication signal and the audio signal are transmitted in the second direction.
摘要翻译：公共广播系统1包括具有环形形状的传输介质4和多个扬声器3.传输介质4在与第一方向相反的第一方向和第二方向上传输传输信号。发送信号包括具有预定频率范围的通信信号和具有与通信信号不同的频率范围的音频信号。公共广播系统1还包括连接到传输介质4的第一滤波器单元51，其被配置为滤波传输信号以衰减通信信号并输出音频信号。第一滤波器单元51连接到传输介质4，使得在通信信号和音频信号沿第二方向发送的同时防止通信信号在第一方向上的传输。

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