公开(公告)号：EP0681688A4

公开(公告)日：1997-04-09

申请号：EP94910662

申请日：1994-01-28

申请人： VIPROTEC PETERSEN ROBERT L

发明人： PETERSEN ROBERT L

IPC分类号： A01M29/02 ,  G10K5/02 ,  G10K11/02 ,  H04R1/34 ,  G01K5/02 ,  G01K7/06

CPC分类号： G10K11/025 ,  G10K5/02

摘要： An ultrasonic transmitter and methods for making the same. A plurality of blocks (24, 26) are provided and are formed such that, when they are coupled together, they form at least one ultrasonic whistle (22) in fluid communication with a manifold (2) and an acoustic horn (8).