The dynamic stiffness indicates the suspension ability dam-laminated including in their enclosed air and is one the parameter, which determines the sound absorption of floor superstructures in residential buildings.
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The Nor-1517A system measures the airflow resistance in porous materials according to ISO 9053/DIN EN 29053 (DIN52213).
Eine Materialprobe von 200x200 mm wird auf einer ebenen Grundplatte angeordnet.
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