[Problem] To provide a means capable of exhibiting high soundproofing performance across a broad range of frequencies of 2000 Hz or less. [Solution] A soundproofing material comprising an elastic sheet and a support part that holds the sheet and that partitions the sheet into partitioned sections, wherein the rigidity (k) of the sheet and the surface density (m) of the sheet in the partitioned sections satisfy the relationship of an12πkm>900Hz
SOUNDPROOFING MATERIAL
2020-05-14
Patent
Electronic Resource
English
IPC: | B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES |