Sound-absorbing element

US4555433A · kind A · utility

Assignees

• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US
• EWALD DÖRKEN AG · DE

Inventors

• Dieter Jablonka · Herdecke, DE
• Klaus Urban · Herdecke, DE
• Heinz Peter Raidt · Dortmund, DE
• Eberhard Schepers · Herdecke, DE

Key dates

• Filing date: Sep 9, 1983
• Grant date: Nov 26, 1985
• Expiry date: Sep 9, 2003

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24678
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

A sound-absorbing element of films has adjacent, cup-shaped recesses in the orm of a grid. The bottom surfaces of the films which are to be exposed to the sound field may be excited into dissipative vibrations when sound is incident thereon. The upper edges of the cup-shaped recesses are jointly covered by another flat material web. The bottom surfaces of the cup-shaped recesses are subdivided into bases by one or more crimp-shaped recesses, the depth of which is appreciably smaller than the depth of the cup-shaped recesses. The sound-absorbing element may be used in building, underground and tunnel construction and in vehicle construction.