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公开(公告)号:US09959855B2
公开(公告)日:2018-05-01
申请号:US15121985
申请日:2014-07-28
发明人: Kyungjun Song , Shin Hur , Youngdo Jung , Seong-Hyun Lee , Jedo Kim
摘要: A sound wave metamaterial amplifies a sound wave, and includes a plate. The plate has a plurality of sound wave guides passing through both surfaces of the plate and having a predetermined pattern. The sound wave guides are spaced apart from each other by a predetermined distance and face each other, with respect to a central point, a central axis or a central surface.