APMR : Acoustical Porous Material Recipes

The aim of this site is to gather information and feedbacks about published or unpublished works in the field of acoustical porous material: models for the propagation of sound, parameter definitions and characterization techniques, standards...

 

Play with the reactive slides of my presentation for I-INCE "Practice of Noise Control" school held during the virtual Internoise 2020 conference, August 23-26.
Interactive slides + video recordings of the presentations by Jaouen, Bécot & Chevillotte during Forum Acusticum 2020.

Content

The content of APMR is growing day after day.
Below is a table of contents of the subjects discussed or planned to be discussed and a search engine.

 (: APMR only)

Propagation models

• Motionless skeleton (equivalent fluid)
• Delany-Bazley
• Delany-Bazley-Miki
• 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

• 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

Basics of Materials

• Material classes
• A note about "meta-materials"
     (Added June 6, 2020)
• A note about fractional derivatives
     used in some visco-elastic models
      (Added August 30, 2020)

Standards

• A list of standards for acoustical materials
     (Updated June 12, 2020)
• Octave and third-octave bands from ISO 3
• Sound Absorption Average from ASTM C423

Upcoming events

Below are conferences or events for which one or more sessions on acoustical porous materials are organized.

SAPEM 2020+1 (Symposium on the Acoustics of Poro-Elastic Materials)

Conference shifted to March 29 to April 2nd, 2021 and online

Abstract submission deadline: Feb. 15th, 2021
Early bird registration: March 8th, 2021

ICSV 2021 (27th edition)

July, 2021 (exact date not known yet) - Prague (Czech Republic)

Abstract submission deadline: Dec. 1, 2020
Early bird registration deadline: March 31, 2021

Internoise 2021

August 1-4, 2021 - Washington DC, (USA)

Abstract submission deadline: Jan. 15, 2021 (paper deadline: April 7, 2021)
Early bird registration: not known yet.

SAE 2021 Noise and Vibration Conference & Exhibition

June 14-17, 2021 - DeVos Place Convention Center Grand Rapids (MI, USA))

Abstract submission deadline: not known yet
Early bird registration: not known yet.

NOVEM 2021 (NOise and Vibration Emerging Methods)

Dec. 13-15, 2021 - Auckland (New Zealand)

Abstract submission deadline: May 31, 2021
Early bird registration: September 30, 2021