Invention Grant
- Patent Title: Broadband ultrathin acoustic wave diffusion structure
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Application No.: US16487389Application Date: 2017-04-26
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Publication No.: US11335311B2Publication Date: 2022-05-17
- Inventor: Yulin Mei , Xiaoming Wang , Yixuan Mei
- Applicant: Dalian University of Technology
- Applicant Address: CN Dalian
- Assignee: Dalian University of Technology
- Current Assignee: Dalian University of Technology
- Current Assignee Address: CN Dalian
- Agency: Muncy, Geissler, Olds & Lowe, P.C.
- International Application: PCT/CN2017/082072 WO 20170426
- International Announcement: WO2018/195835 WO 20181101
- Main IPC: G10K11/162
- IPC: G10K11/162 ; G10K11/20

Abstract:
A broadband ultrathin acoustic wave diffusion structure has a plurality of acoustic wave diffusion units. Each acoustic wave diffusion unit has at least one acoustic wave propagation section, and an acoustic wave focused section communicating with the acoustic wave propagation section is arranged according to needs. The acoustic wave focused section is formed by an acoustic wave focused cavity filled with acoustic material. The acoustic wave focused cavity is a variable-section cavity. The acoustic wave propagation section is formed by a simply connected acoustic wave propagation passage with a close end. Different acoustic wave diffusion units have different lengths of the simply connected acoustic wave propagation passages. The maximum length of the simply connected acoustic wave propagation passage may be dozens or even hundreds of times of the thickness of the acoustic wave diffusion structure, which can meet the diffusion requirements for low frequency acoustic waves to the maximum extent.
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