Title:
DEGENERATE RESONATORS USING ELASTIC METAMATERIALS WITH INDEPENDENT MONOPOLE AND DIPOLE RESONANT STRUCTURES
Document Type and Number:
WIPO Patent Application WO/2016/173502
Kind Code:
A1
Abstract:
A sound absorbing metamaterial is provided with an acoustic impedance-matched surface, which is configured to minimize reflection and transmission of an incident acoustic wave. The surface has a dipole sub-unit (101) and a monopolar sub-unit (102). The dipole sub-unit (101) has a decorated membrane resonator (DMR) with an elastic membrane (123) for the dipole mounted on a fixed frame (124) and a platelet (125) attached to the membrane (123). The monopolar sub-unit (102) has at least two decorated membrane resonators as the two sides of the monopolar sub-unit (102), or a DMR backed by a sealed air cavity mounted on the side wall, and is responsive to vibration or sound by displacement on the two sides equal in amplitude but opposite in direction.
Inventors:
MENG CHONG (CN)
YANG ZHIYU (CN)
YANG MIN (CN)
SHENG PING (CN)
FU CAIXING (CN)
YANG ZHIYU (CN)
YANG MIN (CN)
SHENG PING (CN)
FU CAIXING (CN)
Application Number:
PCT/CN2016/080464
Publication Date:
November 03, 2016
Filing Date:
April 28, 2016
Export Citation:
Assignee:
UNIV HONG KONG SCIENCE & TECH (CN)
International Classes:
G10K11/172
Domestic Patent References:
| WO2014139323A1 | 2014-09-18 |
Foreign References:
| CN103996395A | 2014-08-20 | |||
| CN103137118A | 2013-06-05 | |||
| CN103362229A | 2013-10-23 | |||
| CN1664920A | 2005-09-07 |
Other References:
YANG, MIN ET AL.: "Coupled Membranes with Doubly Negative Mass Density and Bulk Modulus.", PHYSICAL REVIEW LETTERS., 29 March 2013 (2013-03-29)
MEI, JUN ET AL.: "Dark acoustic metamaterials as super absorbers for low-frequency sound.", NATURE COMMUNICATIONS., 27 March 2012 (2012-03-27), XP055326171
YANG, MI N ET AL.: "Sound Absorption by Subwavelength Membrane Structures: A Generalized Perspective.", 23 February 2015 (2015-02-23)
MEI, JUN ET AL.: "Dark acoustic metamaterials as super absorbers for low-frequency sound.", NATURE COMMUNICATIONS., 27 March 2012 (2012-03-27), XP055326171
YANG, MI N ET AL.: "Sound Absorption by Subwavelength Membrane Structures: A Generalized Perspective.", 23 February 2015 (2015-02-23)
Attorney, Agent or Firm:
TEE & HOWE INTELLECTUAL PROPERTY ATTORNEYS (Yeping10th Floor, Tower D, Minsheng Financial Center, 28 Jianguomennei Avenue, Dongcheng District, Beijing 5, CN)
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