Title:
META MUFFLER FOR REDUCING BROADBAND NOISE
Document Type and Number:
WIPO Patent Application WO/2022/092630
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a meta muffler which can increase the transmission loss of noise flowing inside a flow pipe by maximizing the sound energy loss of noise entering a resonance chamber of a meta structure, and can effectively attenuate broadband noise from the low frequency region to the high frequency region. To this end, the present invention is characterized by comprising: a flow pipe through which a fluid flows; an outer cylinder disposed spaced apart from and outside the flow pipe; and meta structures. Each of the meta structures is provided with: an opening portion open in parallel to the flow direction of the fluid; a resonance chamber disposed between the flow pipe and the outer cylinder and communicating with the flow pipe via the opening portion; and a neck adjustment member disposed along the flow direction so as to be spaced apart from the opening portion, and extending from the outer cylinder toward the flow pipe. The plurality of meta structures are arranged along the flow direction.
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Inventors:
AN BYUNG HUN (KR)
LEE JIN WOO (KR)
LEE HAK JOO (KR)
LEE JIN WOO (KR)
LEE HAK JOO (KR)
Application Number:
PCT/KR2021/014162
Publication Date:
May 05, 2022
Filing Date:
October 14, 2021
Export Citation:
Assignee:
CT ADVANCED META MAT (KR)
UNIV AJOU IND ACADEMIC COOP FOUND (KR)
UNIV AJOU IND ACADEMIC COOP FOUND (KR)
International Classes:
F02M35/12; F01N1/02
Foreign References:
| KR20040097531A | 2004-11-18 | |||
| CN106205591A | 2016-12-07 | |||
| US20150345497A1 | 2015-12-03 | |||
| JPH1122444A | 1999-01-26 | |||
| KR20040018720A | 2004-03-04 |
Attorney, Agent or Firm:
KIM, Tae Wan (KR)
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