Dynamic stiffness of impact sound insulation
Impact sound reducing materials, e.g. mineral fibres, wood fibres, or expanded polystyrene, are inserted in floating screeds for structure-borne sound decoupling of the screed plate from the unfinished floor. The dynamic stiffness of the impact sound reducing material s’, or the group dynamic stiffness SD of the material property is determined during the acoustic measurement of floating screeds, e.g. according to Supplement 1 of DIN 4109 or EN 12354-2.
Müller-BBM has a test facility for determining the dynamic stiffness of impact sound insulation according to EN 29052-1. Testing requires test samples that measure 200 mm x 200 mm.
The number of individual tests required per material depends upon the product-specific requirements of the respective standard. They are, for example:
- EN 13162 for impact sound reducing materials made of expanded polystyrene (EPS)
- EN 13163 for impact sound reducing materials made of mineral fibres (MW)
- EN 13171 for impact sound reducing materials made of wood fibres (WF)