A damping material can increase the sound reduction index of a plate on which it is applied.
Thanks to its damping properties, the damping material:
- reduces - other things being equal - the decrease of the sound reduction index (limits the sound transmission factor) of a thin plate for frequencies corresponding to the phenomenon of coincidence
- limits the impact noise associated with the fall of parts (containers, gutters ...) and/or limit the impact noise associated with material being ejected at high speed (duct for waste evacuation, for shavings in suction networks ...).
With its surface density, the damping material increases - all other things being equal - the sound reduction index (limits the sound transmission factor) of a thin plate at frequencies for wich the mass law is applicable.