STUDY OF ACOUSTIC TRANSMISSION THROUGH APERTURES IN A WALL

被引：13

作者：

CHEN, KT

机构：

[1] Department of Naval Architecture and Ocean Engineering, National Taiwan University, Taipei

来源：

APPLIED ACOUSTICS | 1995年 / 46卷 / 02期

关键词：

D O I：

10.1016/0003-682X(95)00009-X

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

The prediction on sound transmission through an aperture in a wall by using a linear plane wave theory, its corresponding laboratory measurement and the comparison between them are discussed in this paper. In order to identify a frequency range in which the acoustically perfect transmission through an aperture never occurs, the laboratory measurements of transmission loss through three types of aperture of different width ave carried out firstly. A theory of sound field in the aperture by superposing two oppositely propagating plane waves and the transmission loss of the aperture calculated by the theory in the frequency range defined above are described secondly. Finally the comparison of the measured transmission losses with the calculated ones of the apertures is discussed. This paper shows that the acoustically perfect transmission through apertures adopted here happens above 1250 Hz and the locally minimum transmission through an aperture occurs nearly at 200 Hz. The difference between the calculated transmission losses and the measurements is always within 4 decibels. Therefore, the above plane wave theory can be applied to predict the transmission loss of an aperture at frequencies so low that only the plane mode waves propagate in the aperture.

引用

页码：131 / 151

页数：21

共 11 条

[1]

Gomperts, The sound insulation of circular and slit-shaped apertures, Acoustica, 14, pp. 1-9, (1964)

[2]

Wilson, Soroka, Approximation of the diffraction of sound by a circular apertures in a rigid wall of finite thickness, The Journal of the Acoustical Society of America, 37, pp. 286-297, (1965)

[3]

Furue, Sound propagation from the inside to the outside of a room through an aperture, Journal of Applied Acoustics, 31, pp. 133-146, (1990)

[4]

Bolton, Hsu, Theoretical derivations on sound transmission through aperture, ME 613 Project Report, (1991)

[5]

Fahy, Sound and Structural Vibration: Radiation, Transmission and Response, (1985)

[6]

Kinsler, Et al., Fundamentals of Acoustics, (1982)

[7]

Beranek, Et al., Noise and Vibration Control, (1992)

[8]

Bolton, Conservation in ME 613, (1992)

[9]

Morse, Ingard, Theoretical Acoustics, (1986)

[10]

Junger, Feit, Sound, Structures, and Their Interaction, (1986)

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