Acoustic and vibrational energy absorption metamaterials

US9520121B2 · kind B2 · utility

Assignee

• The Hong Kong University of Science and Technology

Inventors

• Ping Sheng · Hong Kong, CN
• Zhiyu Yang · Dublin, US
• Min Yang · Sherwood Park, CA
• Liang Sun · Bellevue, US
• Guancong Ma · Hong Kong, CN
• Songwen Xiao · Hong Kong, CN

Key dates

• Filing date: May 27, 2014
• Grant date: Dec 13, 2016
• Expiry date: May 27, 2034

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B32B2607/00
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

A substantially acoustically transparent planar, rigid frame divided into a plurality of individual, substantially two-dimensional cells is used to construct a sound absorption panel. A sheet of a flexible material is fixed to the rigid frame, and a plurality of platelets fixed to the sheet of flexible material such that each cell is provided with a respective platelet, thereby establishing a resonant frequency, establishing an increase in an absorption coefficient of the panel. The flexible material has a wrinkle or corrugation to permit distortion with reduced material elasticity. The wrinkle or corrugation permits the flexible material to distort beyond that afforded by a planar material of the same type, while retaining mechanical strength in supporting the plurality of platelets.