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发明名称
ACOUSTIC TRANSDUCER
摘要
PURPOSE:To provide fine directional characteristics to acoustic waves in a specified distance range by so disposing a plurality of vibrators that their transmission faces or receiving faces of plane or curved form mutually assume angles.
申请公布号
JPS53141057(A)
申请公布日期
1978.12.08
申请号
JP19770055699
申请日期
1977.05.13
申请人
CANON KK
发明人
TAKASHIMA MATSUO
分类号
H04R17/00;A61B8/00;G01N29/04;G01N29/24;G01S7/521;G10K11/32;H04R1/32
主分类号
H04R17/00
代理机构
代理人
主权项
地址
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