Patent · US Expired

Sound absorber for sound waves

US6290022A · kind A · utility

60Cited by

7References

20Claims

0Family size

Assignee

Woco Franz-Josef Wolf & Co. GmbH · DE

Inventors

Franz J. Wolf · Salmünster, DE
Anton Wolf · Gelnhausen, DE
Udo Gartner · Steinau an der Straße, DE

Key dates

Filing date	Dec 21, 1999
Grant date	Sep 18, 2001
Priority date	—
Expiry date	Dec 21, 2019

Classification

Technology area (CPC G)Physics
CPC primaryG10K11/172
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

The broadband surface-like absorber of the invention is used, in particular, for absorbing troublesome airborne noise in the acoustic frequency range. The broadband surface-like absorber, which operates on the Helmholtz resonator principle, is distinguished by a checkerwork of irregular construction, the webs of which are aligned with their narrow sides perpendicular to the principal surface of the perforated plate and the side edges of which are connected in a sound-pressure-resistant and fluidtight manner on the sound side to the rear side of the perforated plate and, on the rear side, to an extended-area cavity boundary aligned with the same orientation as the perforated plate to form differently tuned chamber resonators.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.