The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 08, 2003
Filed:
Mar. 24, 1999
Applicant:
Inventor:
Kari Kirjavainen, Espoo, FI;
Assignee:
Panphonics Oy, Tampere, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61F 1/106 ; G10K 1/116 ; H03B 2/900 ;
U.S. Cl.
CPC ...
A61F 1/106 ; G10K 1/116 ; H03B 2/900 ;
Abstract
The invention relates to a method of and an arrangement for damping a wall movement. In the invention, the strength of an electric field between a surface of a wall and an air-permeable mass plate parallel with the surface is controlled to provide a force opposite to the wall-moving force. A sound wave, for instance, may cause a force moving a wall back and forth, which force is cancelled by the opposite force by means of the method and arrangement of the invention, whereby the movement applied to the wall by the sound wave can be stopped.