Computer and experimental study of the acoustic absorption and transparency of heterogenous porous materials at low-frequencies, in order to identify readily applicable solutions

Abstract

Several industries use machines that expose many workers to high noise levels. This problem is as important as it is complex, and despite the existence of sound-absorbing devices, current solutions are ineffective against low frequencies. The researchers therefore set out to understand the mechanisms underlying the acoustic absorption and transparency of heterogeneous porous materials at low frequencies, and use this knowledge to identify and test readily applicable solutions. Given the complexity of the subject, they focused primarily on sound absorption. They developed a computer model and tested several solutions, based on additive heterogeneity, that exhibited significant low-frequency absorptivity. This report makes a major contribution to the design of new acoustic materials, and also represents an original scientific approach.

Produced Under this Project

Scientific Reports

Computer and experimental study of the acoustic absorption and transparency of heterogeneous porous materials at low frequencies in order to identify readily applicable solutions Research Report: R-278

Scientific Publications

A mixed pressure-displacement formulation for poroelastic materials
Atalla N., Panneton R., Debergue P.
Source :
Journal of the Acoustic Society of America, vol. 104, no 3, 1998, p. 1444-1452
An efficient tool for predicting the structural acoustic and vibration response of sandwich plates in light or heavy fluid
Foin O., Nicolas J., Atalla N.
Source :
Applied Acoustics, vol. 57, no 3, July 1999, p. 213-242
Evolutionary optimization strategies for the combinatorial design of heterogeneous materials
Ratle A., Atalla N.
Source :
Journal of Evolutionary Optimization, vol. 1, no 1, 1999, p. 77-88
Investigation of the convergence of the mixed displacement- pressure formulation for 3-D poroelastic materials using hierarchical elements
Rigobert S., Atalla N., Sgard F.
Source :
Journal of the Acoustic Society of America, vol. 114, no 5, 2003, p. 2607-2617
Behavioral criterion quantifying the edge-constrained effects on foams in the standing wave tube
Pilon D., Panneton R., Sgard F.
Source :
Journal of the Acoustical Society of America, vol. 114, no 4, 2003, p. 1980-1987
Frame acoustical excitability : a decoupling criterion for poroelastic materials
Pilon D., Sgard F., Panneton R.
Source :
in EuroNoise, (May 19-21, 2003 : Naples, Italy), 2003
Modeling thin foam layer bonded onto a plate in the low frequency range
Jaouen L., Atalla N., Brouard B.
Source :
in EuroNoise, (May 19-21, 2003 : Naples, Italy), 2003
Numerical and experimental investigation of the vibro-acoustics of a plate backed cavity coated with an heterogeneous porous material
Atalla N., Amédin C. K., Sgard F.
Source :
in SAE 2003 Noise and Vibration Conference, (May 5-8, 2003 : Traverse City, USA), 2003
Effects of circumferential air gaps on the measurement of the absorption coefficient of poroelastic materials
Pilon D., Panneton R.
Source :
in 144th Meeting of Acoustical Society of America (144th : December 3-7, 2002 : Cancun, Mexico), 2002
Free edge condition on porous materials
Pilon D., Panneton R.
Source :
in Semaine canadienne d'Acoustique (9-11 Octobre, 2002 : Charlottetown, Île-du-Prince-Edouard), 2002
Experimental determination of the acoustical parameters of rigid and limp materials using analytical solutions
Olny X., Panneton R., Van J. T.
Source :
in Forum Acusticum (September 16-20, 2002 : Sevilla, Spain), 2002
An indirect acoustical method for determining intrinsic parameters of porous materials
Olny X., Panneton R., Van J. T.
Source :
in 2nd Biot Conference on Poromechanics (2nd : August 26-28, 2002 : Grenoble, France), 2002
Convergence of Nth order Biot poroelastic finite elements
Pilon D., Panneton R., Sgard F.
Source :
in Ninth Internatinal Congress on Sound and Vibration (9th : July 8-11, 2002 : Orlando, Florida), 2002
Measurement of the acoustic properties of open porous materials using an impedance tube
Atalla Y., Panneton R., Atalla N.
Source :
2nd AutoSEA User's Conference (2nd : April, 17, 2002 : Detroit, Michigan), 2002
Convergence of poroelastic finite elements based on Biot displacement formulation
Dauchez N., Sahraoui S., Atalla N.
Source :
Journal of the Acoustic Society of America, vol. 109, no 1, 2001, p. 33-41
Acoustic absorption from macro-perforated porous materials
Atalla N, Sgard F., Olny X., Panneton R.
Source :
Journal of Sound and Vibration, vol. 243, no 4, 2001, p. 659-678
Polynomial relations for quasi-static mechanical characterization of poroelastic materials
Langlois C., Panneton R., Atalla N.
Source :
Journal of the Acoustic Society of America, vol. 109, no 6, 2001, p. 3032-3040
Enhanced weak integral formulation for mixed (u,p) poroelastic equations
Atalla N., Hamdi A. M., Panneton R.
Source :
Journal of the Acoustic Society of America, vol. 109. no 6, 2001, p. 3065-3068
Analytical solutions for characterizing tortuosity and characteristic lengths of porous materials using acoustical measurements: indirect model
Olny X., Van J. T., Panneton R.
Source :
in 142nd Meeting of the Acoustical Society of America (142nd : December 3-7, 2001 : Fort Lauderdale, Florida), 2001
Analytical solutions for characterizing tortuosity and characteristic lengths of porous materials using acoustical measurements: extrapolation model
Panneton R., Olny X., Van J. T.
Source :
in 142nd meeting of Acoustical Society of America (142nd : December 3-7, 2001 : Fort Lauderdale, Florida), 2001
Mechanical characterization of poroelastic material
Panneton R., Langlois C., Atalla N.
Source :
in 17th International Congress on Acoustics (17th : September 2-7, 2001 : Rome, Italy), 2001
Effects of boundary conditions on standing wave tube measurements
Pilon D., Panneton R., Sgard F. C.
Source :
in 17th International Congress on Acoustics (17th : September 2-7, 2001 : Rome, Italy) 2001
Diffuse field transmission loss of double walls lined with heterogeneous porous materials
Sgard F., Atalla N.
Source :
in 17th International Congress on Acoustics (17th : September 2-7, 2001 : Rome, Italy) 2001
Caractérisation inverse des matériaux poreux utilisés en acoustique
Atalla Y., Panneton R.
Source :
in Congrès annuel de l’ACFAS (14-17 mai, 2001 : Sherbrooke, Canada), 2001
Numerical modeling of multilayered structures including porous materials: hierarchical elements and non coincident meshes
Rigobert S., Sgard F., Atalla N.
Source :
4th European Conference on Noise Control (4th : January, 2001 : Patra, Greece), 2001

Additional Information

Type: Project

Number: 0098-0080

Status: Completed

Year of completion: 2001

Research Field: Mechanical and Physical Risk Prevention

Team:

Franck Sgard (IRSST)
Noureddine Atalla (Université de Sherbrooke)
Jean Nicolas (Université de Sherbrooke)
Raymond Panneton (Université de Sherbrooke)

IRSST - Institut de recherche Robert-Sauvé en santé et en sécurité du travail

project