Audio processing unit and method of processing an audio signal
US9635457B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 2015 |
| Grant date | Apr 25, 2017 |
| Priority date | — |
| Expiry date | Mar 25, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An audio processing unit having a first and second input for receiving output signals of a microphone with a first and a second physically symmetrically structured microphone capsule. The audio processing unit further has a first filter unit and a first delay unit which is coupled to the first input, and a second filter unit and a second delay unit which is coupled to the second input. The audio processing unit further has an adding unit for adding signals from the first and second filter units and a control unit for influencing the filter parameters of the first and second filters and/or the delay times of the first and second delay units depending on an amplitude of an audio signal received via the first and/or second input. A directivity factor of the output signal of the microphone is controlled depending on the amplitude of the output signal of the microphone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.