서지주요정보
박막과 공동계의 저주파 특성 고찰 = The low frequency characteristics of a membrane-cavity system
서명 / 저자 박막과 공동계의 저주파 특성 고찰 = The low frequency characteristics of a membrane-cavity system / 임종민.
저자명 임종민 ; Im, Jong-Min
발행사항 [대전 : 한국과학기술원, 1999].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8009548

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 99065

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Sound absorbing materials, such as glass wool or foam, have been generally used in noise control applications. However their performances in a low frequency range is poor due to inherently poor absorption characteristics. In this paper, a system which is composed of a membrane and an air cavity is used, in order to control the low frequency noise. It absorbs noise by transforming the acoustic energy into the kinetic energy. To analyze the low frequency characteristics of a single membrane-cavity system, a plane wave model is derived and the relations between system variables are investigated. As a result, the frequency characteristics of a membrane-cavity system were found. Absorption coefficient has a maximum value at a peak frequency. This frequency is mainly determined by the density of membrane and the depth of cavity. In addition, a membrane-cavity system absorbs the low frequency noise with band around peak frequency. This band is primarily determined by damping effect in the system. Furthermore, a multiple membrane-cavity system is investigated by using the transfer matrix method. To show the usefulness of the proposed model, extensive experiments were done. Results show that a multiple membrane-cavity system can lead to more broad noise reduction in the low frequency range than single one.

서지기타정보

서지기타정보
청구기호 {MME 99065
형태사항 iii, 97 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 : A, 유한한 크기를 가지는 박막/공동계에서 피크 주파수 예측 (가정: 외부 소음원의 수직입사). - B, 유한한 크기를 가지는 1차원 박막/공동계의 모델링
저자명의 영문표기 : Jong-Min Im
지도교수의 한글표기 : 김양한
지도교수의 영문표기 : Yang-Hann Kim
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학과,
서지주기 참고문헌 수록
주제 소음
저주파
흡음재
박막
Noise
Low frequency
Sound absorbent
Membrane
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