Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Rod Morris-Kirby0
Marco Schneider0
Norbert Nicolai0
Olaf Dohring0
Colm Doris0
Hans-Peter Keller0
Date of Patent
November 21, 2006
0Patent Application Number
107477630
Date Filed
December 29, 2003
0Patent Primary Examiner
Patent abstract
The present invention relates to a sound absorber consisting of a first non-woven fabric facing towards the sound-emitting source having a layer thickness within a range of from 2 to 15 mm, a density within a range of from 50 to 500 kg/m3, a weight per surface area within a range of from 0.1 to 2.5 kg/m2, and a flow resistance within a range of from 50 to 1000 kNs/m4, and a second non-woven fabric facing away from the sound-emitting source has a layer thickness within a range of from 10 to 28 mm, a density within a range of from 20 to 100 kg/m3, a weight per surface area within a range of from 0.4 to 1 kg/m2, and a flow resistance within a range of from 10 to 40 kNs/m4.
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