Acoustic performance

  • Sound reduction index
Performances are characterised by the sound reduction index RA,tr which measures the capacity to block out airborne noise from roads (traffic noise). It is better when the glass components are thicker and/or of different thicknesses. This index is measured according to EN 140 standard.
  • Reinforced acoustic performance classes in ascending order
There are 6 Acoustic Reinforced performance classes for glazing (AR1 to AR6).
These AR classes include sound reduction indices from 25 dB to 38 dB to deal with road noise.