公开(公告)号：US3597859A

公开(公告)日：1971-08-10

申请号：US3597859D

申请日：1969-08-26

申请人： KENNETH G SALEM

发明人： SALEM KENNETH G

IPC分类号： G09B23/14 ,  G09B23/06

CPC分类号： G09B23/14

摘要： An apparatus is provided for visually demonstrating sound wave motion in the form of a plurality of side-by-side reflective strips suspended vertically from one end, a source of moving fluid acting continuously on said strips and an indicating means normally reflected from the strips intermediate their ends.