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Impact sound insulation

Impact sound insulation relates to the reduction of footstep sound from people walking on a floor structure. It is determined by the impact sound level in the room below. A suspended ceiling system can be used to improve the impact sound insulation and therefore reduce the impact sound level. Improvements are always linked to a specific type of floor structure. 

Impact sound level values

Improvement of laboratory value ΔLn,w accoring to ISO 140-8 and ISO 717-2 

4-7 dB


7-10 dB

Combison Uno / Combison Duo

11-14 dB

Combison Uno / Combison Duo + Combison XR


The improvements are linked to a homogenous concrete floor of normal thickness (160-200 mm) and with a plastic carpet.


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