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. 14, 2026
Filed:
Feb. 08, 2024
Ajou University Industry-academic Cooperation Foundation, Suwon-si, KR;
Jin Woo Lee, Suwon-si, KR;
Jae Ho Cho, Seoul, KR;
AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION, Suwon-si, KR;
Abstract
The present disclosure provides an acoustic metamaterial-based muffler for broadband exhaust noise reduction of internal combustion engines is mounted on an exhaust pipe of an internal combustion engine, and includes an exhaust flow pipe that is formed of an inlet on one side through which exhaust of the internal combustion engine flows in, an outlet on the other side through which the exhaust flows out, and a flow passage on the inside through which the exhaust flows from one side to the other side; and a plurality of noise reduction units that are provided inside along a longitudinal direction of the exhaust flow pipe to attenuate noise in the corresponding frequency band among the exhaust noises flowing along the exhaust flow pipe.