The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 28, 2026
Filed:
Apr. 21, 2022
The Hong Kong University of Science and Technology, Hong Kong, CN;
Ping Sheng, Hong Kong, CN;
Ho Yiu Mak, Hong Kong, CN;
Xiaonan Zhang, Hong Kong, CN;
Zhen Dong, Hong Kong, CN;
THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Hong Kong, CN;
Abstract
The ultra-low frequency acoustic absorber () includes a hollow housing () having opposed first and second open ends (), and a plurality of metallic mesh layers () stacked within the housing (). In order to secure the plurality of metallic mesh layers () within the hollow housing (), first and second mesh covers () may cover the first and second open ends () of the hollow housing (), respectively. At least one spacer () may be provided to form a gap between the housing () and a support surface, such as a hard wall (W) or the like. The at least one spacer () may have a length sufficient to space the ultra-low frequency acoustic absorber () at the position of optimal absorption based on an acoustic soft 10 boundary condition (ASBC).