Rieter Technologies Ag

Autoneum Management Ag

Jan Horak

Alexander Wildhaber

Philippe Godano

Davide Caprioli

Gabriele Tocchi

Phillippe Pierre Godano

Bertrand Francois Delmas

Tommy Goran Falk

Karim Bouteraa

Francisco Sanchez Climent

The invention relates to a thin sound absorbing multi-layer assembly, which is intended, in particular, to reduce interior or exterior noise of a motor vehicle. The assembly according to the invention comprises at least three stacked layers consisting respectively of: a first layer () being impervious and having an area weight of between (20) to (100 g/m2); a second layer () having an air flow resistance of between (250) to (2500 Ns/m3) and an area weight of between (15) to (250 g/m2); a third layer () being an open pored, acoustic spring type layer having a thickness of between (2) to (30 mm) and an area weight of between (50) to (1000 g/m2).

Sealed thin-multi-layer sound absorber

Growing community of inventors

Winterthur, Switzerland

Jan Horak