Rieter Technologies Ag

Adler Pelzer Holding Gmbh

Adler Evo S.r.l

Gabriele Tocchi

Volkmar Schulze

Norbert Nicolai

Alexander Wildhaber

Maurizio Tarello

Phillippe Pierre Godano

Bertrand Francois Delmas

Jan Horak

Tommy Goran Falk

Karim Bouteraa

André Wutzler

Hannes Blomberg

Samuele Rossi

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

Sesto San Giovanni, Italy

Gabriele Tocchi