SIGMA chamber

It consists in a room where temperature and hygrometry are controlled and devoted to the characterization of various physical parameters at the « material » scale.

In particular, measurements are performed on:

Porous materials :

  • Determination of the air flow resistivity, r, according to the NF EN 29053 standard
  • Determination of the dynamic stiffness, s’, according to the NF EN 29052-1 standard
  • Determination of the absorption coefficient in normal incidence, αN, according to NF EN ISO 10534-2 standard

Solid materials :

  • Determination of the elastic modulus on bars according to NF EN ISO 14146 standard and ETAG 04
  • Determination of the elastic modulus on thin plates according to NF EN ISO 16940 standard

These data can be useful for the prediction of the acoustic behavior at « system » or even « building » scales.