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:
Nov. 19, 2002
Filed:
Aug. 19, 1998
Applicant:
Inventor:
Kari Kirjavainen, Espoo, FI;
Assignee:
Panphonics Oy, Tampere, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 2/500 ;
U.S. Cl.
CPC ...
H04R 2/500 ;
Abstract
The invention relates to an acoustic element and method for sound processing. The acoustic element ( ) is made of a porous stator plate ( ) which is either electrically conductive or plated on at least one of its surfaces to be conductive. A moving diaphragm ( ) has been attached to the stator plate ( ). To measure as well as produce sound pressure and particle velocity, the equipment comprises two pairs of aforementioned acoustic elements ( ). Elements serving as sensors control elements serving as actuators to attenuate and absorb sound.