Matsushita Electric Industrial Co., Ltd.

Atsunao Shinoda

Tsuyoshi Kimura

Kuniaki Ohsawa

Hideaki Ishikawa

To provide a loudspeaker broadcasting system and a loudspeaker broadcasting apparatus which can perform a loudspeaker broadcasting of appropriate contents at each block without reducing sound clearness. Bi-directional speakerswhich performs sound-reinforcement having high intelligibility, and fire detecting sensorswhich detect fire occurrence in a tunneland send fire occurrence signals are placed in the tunnelin the tunnel extending direction. In an emergency such as a fire, emergency broadcasting is performed through each bi-directional speakerat each of the predetermined blocksin the tunnel. The emergency broadcasting is different in contents at each block, and it is alternately performed at the adjacent blocks. Further, the frequency components having a long reverberation time is removed from the loudspeaker broadcasting through the bi-directional speaker

Loudspeaker broadcasting system and loudspeaker broadcasting apparatus

A drive through wireless order taking system includes a base station, and a slave station being connectable with the base station by radio and being movable into and out of a talk lock state. The base station includes a device for transmitting a talk lock release signal to the slave station. The slave station includes a device for moving the slave station out of the talk lock state in response to the talk lock release signal transmitted from the base station.

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Tokyo, Japan

Atsunao Shinoda