Ambient noise reduction arrangements
US8472636B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 17, 2007 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Jun 11, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/1083
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A feedforward ambient noise reduction arrangement (10) includes, within a housing, a loudspeaker device for directing sound energy into an ear of a listener. Disposed externally of the housing, and positioned to sense ambient noise on its way to the listener's ear, are plural microphone devices (21-15) capable of converting the sensed ambient noise into electrical signals for application to the loudspeaker to generate an acoustic signal opposing the ambient noise. Importantly, the overall arrangement is such that the acoustic signal is generated by said loudspeaker means in substantial time alignment with the arrival of said ambient noise at the listener's ear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.