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:
Sep. 30, 2003
Filed:
Aug. 28, 2000
Erich Klein, Himberg, AT;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
In an adapted to be used in an on-ear mode and in an off-ear mode a holder compartment ( )accommodates a first transducer ( )and a second transducer ( )and the holder compartment ( )is bounded by a bounding wall ( )formed with internal sound ports ( )and at least one additional internal sound port ( ), and an outer wall ( )formed with external sound ports ( )is spaced at a distance from the bounding wall ( ), and at least one additional external sound port ( )is provided between the bounding wall ( )and the outer wall ( ), and the two transducers ( )can be driven with useful signals of the same phase in the off-ear mode and with useful signals of opposite phase in the on-ear mode.