Modelling of rigid-frame porous materials - A simple approach

M. J. Brennan; W. M. To

doi:10.1115/IMECE2000-1637

Modelling of rigid-frame porous materials - A simple approach

M. J. Brennan, W. M. To

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

This paper is concerned with the modelling of rigidframe porous materials. Currently there are very simple models which describe the acoustic behaviour of such materials, and there are also very complicated models. The aim of this paper is to present a model which occupies the "middle ground", but is simple enough to be used by practising noise control engineers. Using concepts of acoustic mass, stiffness and damping, non-dimensional expressions for the acoustic wavenumber and the characteristic impedance of a rigid-frame porous material are derived. These expressions are used to give a "rule of thumb" for the optimum flow resistivity for a given thickness of material.

Original language	English
Title of host publication	Noise Control and Acoustics
Publisher	American Society of Mechanical Engineers (ASME)
Pages	479-485
Number of pages	7
ISBN (Electronic)	9780791819098
DOIs	https://doi.org/10.1115/IMECE2000-1637
Publication status	Published - 2000
Externally published	Yes
Event	ASME 2000 International Mechanical Engineering Congress and Exposition, IMECE 2000 - Orlando, United States Duration: 5 Nov 2000 → 10 Nov 2000

Publication series

Name	ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Volume	2000-AC

Conference

Conference	ASME 2000 International Mechanical Engineering Congress and Exposition, IMECE 2000
Country/Territory	United States
City	Orlando
Period	5/11/00 → 10/11/00

Access to Document

10.1115/IMECE2000-1637

Cite this

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title = "Modelling of rigid-frame porous materials - A simple approach",

abstract = "This paper is concerned with the modelling of rigidframe porous materials. Currently there are very simple models which describe the acoustic behaviour of such materials, and there are also very complicated models. The aim of this paper is to present a model which occupies the {"}middle ground{"}, but is simple enough to be used by practising noise control engineers. Using concepts of acoustic mass, stiffness and damping, non-dimensional expressions for the acoustic wavenumber and the characteristic impedance of a rigid-frame porous material are derived. These expressions are used to give a {"}rule of thumb{"} for the optimum flow resistivity for a given thickness of material.",

author = "Brennan, {M. J.} and To, {W. M.}",

note = "Publisher Copyright: {\textcopyright} 2000 American Society of Mechanical Engineers (ASME). All rights reserved.; ASME 2000 International Mechanical Engineering Congress and Exposition, IMECE 2000 ; Conference date: 05-11-2000 Through 10-11-2000",

year = "2000",

doi = "10.1115/IMECE2000-1637",

language = "English",

series = "ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)",

publisher = "American Society of Mechanical Engineers (ASME)",

pages = "479--485",

booktitle = "Noise Control and Acoustics",

}

Brennan, MJ & To, WM 2000, Modelling of rigid-frame porous materials - A simple approach. in Noise Control and Acoustics. ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE), vol. 2000-AC, American Society of Mechanical Engineers (ASME), pp. 479-485, ASME 2000 International Mechanical Engineering Congress and Exposition, IMECE 2000, Orlando, United States, 5/11/00. https://doi.org/10.1115/IMECE2000-1637

Modelling of rigid-frame porous materials - A simple approach. / Brennan, M. J.; To, W. M.
Noise Control and Acoustics. American Society of Mechanical Engineers (ASME), 2000. p. 479-485 (ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE); Vol. 2000-AC).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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N2 - This paper is concerned with the modelling of rigidframe porous materials. Currently there are very simple models which describe the acoustic behaviour of such materials, and there are also very complicated models. The aim of this paper is to present a model which occupies the "middle ground", but is simple enough to be used by practising noise control engineers. Using concepts of acoustic mass, stiffness and damping, non-dimensional expressions for the acoustic wavenumber and the characteristic impedance of a rigid-frame porous material are derived. These expressions are used to give a "rule of thumb" for the optimum flow resistivity for a given thickness of material.

AB - This paper is concerned with the modelling of rigidframe porous materials. Currently there are very simple models which describe the acoustic behaviour of such materials, and there are also very complicated models. The aim of this paper is to present a model which occupies the "middle ground", but is simple enough to be used by practising noise control engineers. Using concepts of acoustic mass, stiffness and damping, non-dimensional expressions for the acoustic wavenumber and the characteristic impedance of a rigid-frame porous material are derived. These expressions are used to give a "rule of thumb" for the optimum flow resistivity for a given thickness of material.

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ER -

Modelling of rigid-frame porous materials - A simple approach

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