US 12,270,165 B2
Sound absorber
Ralf Dirnberger, Oberndorf bei Salzburg (AT)
Assigned to Sealed Air Verpackungen GmbH, Alsfeld (DE)
Appl. No. 17/763,402
Filed by Sealed Air Verpackungen GmbH, Alsfeld (DE)
PCT Filed Oct. 1, 2020, PCT No. PCT/EP2020/077574
§ 371(c)(1), (2) Date Mar. 24, 2022,
PCT Pub. No. WO2021/064129, PCT Pub. Date Apr. 8, 2021.
Claims priority of application No. A 50833/2019 (AT), filed on Oct. 1, 2019.
Prior Publication US 2022/0341107 A1, Oct. 27, 2022
Int. Cl. E01F 8/00 (2006.01); E01B 19/00 (2006.01); E04B 1/84 (2006.01); G10K 11/162 (2006.01)
CPC E01F 8/0017 (2013.01) [E01F 8/0047 (2013.01); G10K 11/162 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A sound absorber for a traffic route noise protection wall, the sound absorber comprising:
at least one plastic foam board having a given thickness and a first surface forming a surface of the sound absorber and defining sound absorber recesses in the form of a plurality of grooves extending across the first surface to provide a desired frequency response sound absorption capacity behavior for the foam board, wherein the sound absorber recesses extend only partially into the thickness of the plastic foam board.