Content
Propagation models
• Motionless skeleton (equivalent fluid)
• Delany-Bazley
• Delany-Bazley-Miki
• Horoshenkov et al.
• Johnson-Champoux-Allard
• Johnson-Champoux-Allard-Lafarge
• Johnson-Champoux-Allard-Pride-Lafarge
• Wilson
• Uniform pressure (equivalent solid)
• Diphasic (Biot's theory)
• Linking micro-structure to macro-properties
• Delany-Bazley
• Delany-Bazley-Miki
• Horoshenkov et al.
• Johnson-Champoux-Allard
• Johnson-Champoux-Allard-Lafarge
• Johnson-Champoux-Allard-Pride-Lafarge
• Wilson
• Uniform pressure (equivalent solid)
• Diphasic (Biot's theory)
• Linking micro-structure to macro-properties
Parameters of models
• Static air flow resistivity (& static permeability)• Open porosity
• High frequency limit of the dynamic tortuosity
• Viscous characteristic length
• Thermal characteristic length
• Static thermal permeability
Characterization of parameters
• Static air flow resistivity (& permeability)• Open porosity
• High frequency limit of the dynamic tortuosity
• Viscous characteristic length
• Thermal characteristic length
• Static thermal permeability
• Conditions on parameters
Basics of Acoustics
• Some physical phenomena• Compressional wave
• Propagative vs. standing waves
• Wave number
• Wave dispersion
• Length corrections
• Darcy's law
• Viscous boundary layer
• Helmholtz resonator
• Transmission Loss of a single partition
• The coincidence frequency
Basics of Mechanics
• Single degree of freedom (SDOF) systems• Solution to undamped 1D harmonic oscillator
• Beam bending (compute eigenfrequencies)
• Comparison of damping models
• Snell-Descartes to variational principles
• Variational methods
• Flow around a disk
• Limits of plate theories
• Condensed models for multilayer structures
Upcoming events
Below are conferences or events for which one or more sessions on acoustical porous materials are organized.
July, 5-10 2026 - Istanbul (Turkiye)
Abstract submission deadline: December 31, 2025
Early bird registration deadline: February 28, 2026
September 7-9, 2026 - Leuven (Belgium)
Abstract submission deadline: during October 2025, 2024
Early bird registration: to be announced in 2026
Sept. 8-12, 2026 - Graz (Austria)
Abstract submission deadline: between January and March 2026
Early bird registration: to be announced
SAPEM 2026 (Symposium on the Acoustics of Poro-Elastic Materials)
Nov. 16-20, 2026 - Marne-la-Vallée (greater Paris, France)
Abstract submission deadline: May 15, 2026
Early bird registration: July 13, 2026
Forum Acusticum 2027 (joint conference with ASA)
June 21-25, 2027 - Brussels (Belgium)
Abstract submission deadline: to be announced in late 2026
Early bird registration: to be announced in late 2026