DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Choi, Jung Woo | - |
dc.contributor.advisor | 최정우 | - |
dc.contributor.author | Park, Sooyoung | - |
dc.date.accessioned | 2019-09-04T02:45:21Z | - |
dc.date.available | 2019-09-04T02:45:21Z | - |
dc.date.issued | 2018 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=828575&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/266974 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 전기및전자공학부, 2018.8,[vii, 87 p. :] | - |
dc.description.abstract | Impedance of wall enclosing a listening room is one of the major factors that determine the sound quality. Therefore, to improve the acoustic environment of a listening room, it is important to accurately identify the impedance of the material forming the wall. The impedance tube technique is a well-known standard method for measuring impedance. This technique, however, requires a specimen of a wall installed in the impedance tube, and only the impedance corresponding to normal incidence can be measured. Since sound can impinge from various directions inside a room, the impedance estimated by the tube technique cannot represent the actual impedance in a practical situation. In order to circumvent this problem, various in-situ measurements have been proposed, but most of conventional techniques have problems such as source singularity or inaccurate separation of the incident wave and reflected wave. In this research, the impedance is directly estimated in an enclosed space using a circular equivalent source method, which can reconstruct a local sound field from the measurement by a microphone array. The sound pressure and velocity fields on the wall surface are reconstructed by the equivalent source method, and the surface impedance is estimated from the reconstructed sound field. The feasibility of the proposed method is validating using 2D sound field simulation, and the conditions for accurate impedance prediction, such as microphone and equivalent source configurations, are investigated to provide a guideline for successive acoustic impedance estimation an enclosed space. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | Impedance estimation▼ain-situ estimation▼aequivalent source method▼alocal sound field reconstruction | - |
dc.subject | 임피던스 추정▼a현장 추정▼a등가음원법▼a부분 음장 복원 | - |
dc.title | In-situ Estimation of Impedance in Enclosed Space using Circular Microphone | - |
dc.title.alternative | 원형 마이크로폰을 이용한 닫힌 공간에서의 임피던스 현장 추정 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :전기및전자공학부, | - |
dc.contributor.alternativeauthor | 박수영 | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.