Acoustic performance

  • Sound reduction index
Performances are characterised by the sound reduction index RA,tr which measures the capacity to block out noise from roads (traffic). It is better when the glass components are thicker and/or of different thicknesses. This index is measured according to EN 140 standard.
  • Acoustic performance classes
These classes AR1 to AR6 include sound reduction indices from 25 dB to 38 dB to deal with road noise.