Providing ambient naturalness in ANR headphones

US10074354B2 · kind B2 · utility

Assignee

• Bose Corporation · US

Inventors

• Daniel M. Gauger, Jr. · Cambridge, US
• Ricardo F. Carreras · Southborough, US
• Jason Harlow · Watertown, US
• Neil Adam Ranney · Boston, US
• Martin Ring · Königstein, DE
• Roman Sapiejewski · Boston, US
• Vishu Singh · Watertown, US

Key dates

• Filing date: Mar 29, 2016
• Grant date: Sep 11, 2018
• Expiry date: Apr 25, 2036

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04R2460/05
• WIPO field: Other consumer goods
• WIPO sector: Other fields

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.