Feedback-based ANR adjustment responsive to environmental noise levels
US8208650B2 · kind B2 · utility
21Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2009 |
| Grant date | Jun 26, 2012 |
| Priority date | — |
| Expiry date | Aug 11, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/3213
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An ANR circuit, possibly of a personal ANR device, monitors a sound level of environmental sounds detected by a microphone external to an earpiece in which the ANR circuit is providing feedback-based ANR, and increases or decreases the degree of feedback-based ANR provided in response to the external microphone detecting a higher or lower sound level, respectively. Increasing and decreasing the degree of feedback-based ANR provided may be carried out by changing a variable loop gain of the ANR circuit and/or a range of frequencies of environmental sounds attenuated by the feedback-based ANR.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.