Identification of Acoustic Modeling Parameters of Porous and Solid Materials

During the process of designing acoustic treatments including porous materials, the definition of the modeling parameters of these materials is a critical step.

FOAM-X allows you to extract the following parameters: 

Main Advantages

Exploit All FOAM-X Possibilities!

ASTM E1050 | ISO 10534-2 | ASTM 2611

Characterizes several types of open-cell porous and solid materials

Foam | Fibrous | Perforated sheet | Resistive screen | Fabric | Isotropic membrane

Characterizes three different types of structure

Rigid | Limp | Elastic

Considers the boundary conditions of the assembly of the material

Laterally bonded | Laterally sliding | Peripheral air leaks

More Pictures and Videos

Discover What FOAM-X Looks Like! (click to expand)

Perfect For

Profit from a Perfect Integration of FOAM-X with Mecanum’s Measuring Instruments!

PHI | Porosity and Density Meter

Mecanum PHI Porosity and Density Meter - Open porosity and true bulk density of open-cell porous materials - Pot and Equipment

QMA | Mechanical Analyzer

Mecanum QMA Quasi-static Mechanical Analyser - Measure the BIOT elastic properties of porous materials - Young's modulus, damping coefficient and Poisson's ratio - ISO 18437-5 - Equipment

SIGMA | Airflow Resistivity Meter

Mecanum SIGMA Resistivity Meter - Measurement of static airflow resistivity, resistance and permeability for open-cell porous materials used for noise control - ASTM C522-03 and ISO 9053 - Standard Equipment

TOR | Tortuosity Meter

2 Gas Tortuosity Meter - Tortuosity and Characteristic Lenghts for Pourous Materials - Noise Control - Equipment

TUBE | Impedance Tubes

Mecanum Impedance and Transmission Tube - 29 mm - ASTM E1050, ASTM E2611 and ISO 10534-2 - 2, 3 Mics Configuration

And Even More Functions!

Never Ending Functions!

Identification of Acoustic Modeling Parameters​

  • Calculates the mean and standard deviation of the data set.
  • Corrects tube and measurement conditions (temperature, atmospheric pressure and relative humidity).
  • The user can provide parameters to improve convergence (density, resistivity, porosity, tortuosity and other parameters).
  • Identification according to three types of skeleton (rigid, flexible or elastic).
  • Identification over a range of frequencies (min, max).

Display, Simulation and Sensitivity Analysis

  • Validation of the parameters obtained by comparison of simulations using analytical or numerical poroelastic or solid models (finite elements) with impedance/transmission tube measurements.
  • Plots both predicted and measured data (if available) of:
Absorption, reflection or surface impedance coefficient,
Attenuation index,
Dynamic properties (characteristic impedance, wave number, effective dynamic density, effective bulk modulus),
  • Export data to csv file or clipboard,
  • Simulates the effects of boundary conditions and lateral acoustic leakage in tubes by the axisymetric finite element method (axiFEM).
  • Predicts all the acoustic properties in the case of excitation by a plane wave of normal incidence such as: absorption coefficient, attenuation index, surface and characteristic impedance, number of complex wave, effective dynamic density and effective bulk modulus.
  • Takes into account:
The type of termination (air cavity, rigid bottom or anechoic),
The boundary conditions (bonded, sliding, with air leaks),
The type of skeleton (rigid, flexible and elastic),
The material thickness and diameter,
The atmospheric conditions,
The parameter uncertainties.


  • Retains materials identified by FOAM-X or your own method.
  • Searches for materials according to different criteria (e.g. price, porosity, resistivity to the passage of air, thickness, etc.)
  • Compares two materials.

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