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:
Dec. 03, 2002
Filed:
Jan. 26, 2000
Erich Klein, Himberg, AT;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
In an apparatus ( ) having a housing ( ) and having an electroacoustic transducer ( ) accommodated in the inner housing space ( ) and having at least one passage ( ) which traverses a housing wall ( ) and which, together with the inner housing space ( ) and the rear volume ( ) of the transducer ( ), which rear volume ( ) is open to the inner housing space ( ), forms an absorption-circuit resonator which causes a dip ( ) in the sound pressure versus frequency response( ), a compensator ( ) for the compensation of the dip ( ) in the sound pressure versus frequency response ( ) is provided and includes the housing ( ) being provided with a plurality of ducts ( ) traversing the housing ( ), each duct forming an acoustic friction.