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:
Aug. 05, 2014
Filed:
Nov. 02, 2012
Daniel M. Gauger, Jr., Berlin, MA (US);
Ricardo F. Carreras, Southborough, MA (US);
Jason Harlow, Watertown, MA (US);
Neil Adam Ranney, Boston, MA (US);
Martin David Ring, Ashland, MA (US);
Roman Sapiejewski, Boston, MA (US);
Vishu Singh, Brighton, MA (US);
Daniel M. Gauger, Jr., Berlin, MA (US);
Ricardo F. Carreras, Southborough, MA (US);
Jason Harlow, Watertown, MA (US);
Neil Adam Ranney, Boston, MA (US);
Martin David Ring, Ashland, MA (US);
Roman Sapiejewski, Boston, MA (US);
Vishu Singh, Brighton, MA (US);
Bose Corporation, Framingham, MA (US);
Abstract
In an active noise reducing headphone, a signal processor applies filters and control gains of both the feed-forward and feedback active noise cancellation signal paths. The signal processor is configured to apply first feed-forward filters to the feed-forward signal path and apply first feedback filters to the feedback signal path during a first operating mode providing effective cancellation of ambient sound, and to apply second feed-forward filters to the feed-forward signal path during a second operating mode providing active hear-through of ambient sounds with ambient naturalness.