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:
Apr. 22, 2014
Filed:
Sep. 04, 2009
Oliver Gelhard, Hannover, DE;
Christian Grone, Neustadt, DE;
Oliver Gelhard, Hannover, DE;
Christian Grone, Neustadt, DE;
Sennheiser electronic GmbH & Co. KG, Wedemark, DE;
Abstract
There is provided an entertainment system comprising at least one seat, an electronic unit () for active noise reduction in the seat and at least one headphone (). The headphone has an electro-acoustic reproduction transducer (), a microphone () for recording interference signals and an adjusting unit () having an active filter for correcting a frequency response characteristic of the output signal of the microphone, for performing pre-filtration for active noise reduction and for the output of a corrected and filtered signal. The electronic unit () performs active noise reduction based on the corrected and filtered signal of the adjusting unit ().