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The influence of finite cavities on the sound insulation of double-plate structures

Brunskog, Jonas LU (2005) In Journal of the Acoustical Society of America 117(6). p.3727-3739
Abstract
Lightweight walls are often designed as frameworks of studs with plates on each side-a double-plate structure. The studs constitute boundaries for the cavities, thereby both affecting the sound transmission directly by short-circuiting the plates, and indirectly by disturbing the sound field between the plates. The paper presents a deterministic prediction model for airborne sound insulation including both effects of the studs. A spatial transform technique is used, taking advantage of the periodicity. The acoustic field inside the cavities is expanded by means of cosine-series. The transmission coefficient (angle-dependent and diffuse) and transmission loss are studied. Numerical examples are presented and comparisons with measurement are... (More)
Lightweight walls are often designed as frameworks of studs with plates on each side-a double-plate structure. The studs constitute boundaries for the cavities, thereby both affecting the sound transmission directly by short-circuiting the plates, and indirectly by disturbing the sound field between the plates. The paper presents a deterministic prediction model for airborne sound insulation including both effects of the studs. A spatial transform technique is used, taking advantage of the periodicity. The acoustic field inside the cavities is expanded by means of cosine-series. The transmission coefficient (angle-dependent and diffuse) and transmission loss are studied. Numerical examples are presented and comparisons with measurement are performed. The result indicates that a reasonably good agreement between theory and measurement can be achieved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of the Acoustical Society of America
volume
117
issue
6
pages
3727 - 3739
publisher
American Institute of Physics
external identifiers
  • wos:000229718500043
  • pmid:16018476
  • scopus:20444370644
ISSN
1520-8524
DOI
10.1121/1.1904264
language
English
LU publication?
yes
id
b974b084-a648-4040-aafc-7c15ecbb3a64 (old id 237385)
date added to LUP
2007-09-21 09:41:43
date last changed
2017-08-27 05:37:26
@article{b974b084-a648-4040-aafc-7c15ecbb3a64,
  abstract     = {Lightweight walls are often designed as frameworks of studs with plates on each side-a double-plate structure. The studs constitute boundaries for the cavities, thereby both affecting the sound transmission directly by short-circuiting the plates, and indirectly by disturbing the sound field between the plates. The paper presents a deterministic prediction model for airborne sound insulation including both effects of the studs. A spatial transform technique is used, taking advantage of the periodicity. The acoustic field inside the cavities is expanded by means of cosine-series. The transmission coefficient (angle-dependent and diffuse) and transmission loss are studied. Numerical examples are presented and comparisons with measurement are performed. The result indicates that a reasonably good agreement between theory and measurement can be achieved.},
  author       = {Brunskog, Jonas},
  issn         = {1520-8524},
  language     = {eng},
  number       = {6},
  pages        = {3727--3739},
  publisher    = {American Institute of Physics},
  series       = {Journal of the Acoustical Society of America},
  title        = {The influence of finite cavities on the sound insulation of double-plate structures},
  url          = {http://dx.doi.org/10.1121/1.1904264},
  volume       = {117},
  year         = {2005},
}