Method for enhancing noise reduction amount of feedback active noise reduction headphone, and active noise reduction headphones
US10687140B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2016 |
| Grant date | Jun 16, 2020 |
| Priority date | — |
| Expiry date | May 25, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2460/01
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed are a method for enhancing noise reduction amount of a feedback active noise reduction headphone and active noise reduction headphones. The method includes: arranging a noise reduction microphone of the feedback active noise reduction headphone at a position away from directly in front of a loudspeaker; and adjusting a relative position between the noise reduction microphone and an ear canal opening of a wearer, and enabling an open-loop transfer function at the ear canal opening L2(s0) and an open-loop transfer function at the noise reduction microphone L1(s0) to satisfy a relation of |L2(s0)|>|L1(s0)|, to enhance an actual noise reduction amount at the ear canal opening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.