Vibroacoustic characterization of materials
The CEVAA offers its materials expertise in the vibration and acoustic fields.

Materials characterization
- Young’s modulus and shear
- Poisson ratio
- Damping
- Dynamic stiffness
- Sound absorption coefficient
- Sound reduction index
- Insertion loss
The CEVAA takes into account the characteristics of the materials, their requirements and their behavior under operational conditions.
Our services
- Characterization of the dynamic properties (modulus of elasticity, damping, Poisson’s ratio) of viscoelastic materials, plastics, alloys, composites, …
- Characterization of the acoustic properties of porous materials
- Identification of a porous material model or a poroelastic model
- Measurement of impact or slip-grip noise, characterization of material pairs
- Measurement of sound absorption coefficient (α) and transmission loss (STL)
- Measurement of sound insulation or insertion loss (IL) of a multilayer complex or a soundproofing piece
- Modeling and optimization of damping treatments, multilayer materials, composites
Compliance with industry standards
Procedures Alliance Renault Nissan
- Impedance tube measurements according to D49 2031
- Small cabin measurements according to RNES-D-20003 & RNES-D-20004 (D45 2019 & 37-06-082) + 32-06-009,
- Measurement in Alpha cabin according to RNES-D-20001 (D49 1977)
- Renault SELF AGREMENT skills recognition
Procedures PSA group
- Impedance tube measurements according to D45 5430
- Small cabin measurements according to D45 5038, B65 4250, DMFV_ACV02V0248
- Measurement in Alpha cabin according to D49 1977
International standards
- Impedance tube measurements according to NF EN ISO 10534-2 and ASTM E 2611 standards
- Measurement of the composite loss factor by the Oberst method according to NF EN ISO 6721-3
- Rubbling and rattling measurement according to SAE J2192 (option 2)
Characterization of materials
FOR MORE INFORMATION, CONTACT US TO DISCUSS TECHNICALLY ON YOUR NEEDS!