DISTRIBUTION ARRANGEMENT TYPE PIEZOELECTRIC SPEAKER NETWORK SYSTEM AND PIEZOELECTRIC SPEAKER DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a piezoelectric speaker network system for transmitting clearly uniform sound efficiently in a wide area.SOLUTION: A piezoelectric speaker 1 whose sound arrival distance is 10 m to 250 m and has light-weight and high efficiency is distributed and arranged in an area so that a circle formed around the speaker by taking the sound arrival distance as its radius is in contact with another one's circle. Sound current is made to flow from a base station 3 in the area 2 by wire or wireless to surely transmit clear sound over the whole area. The speaker can be used in a network system in which information is selectively transmitted from a center facility to each area unit configuring a wide area.