Endfire linear array microphone
US11770650B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 2022 |
| Grant date | Sep 26, 2023 |
| Priority date | — |
| Expiry date | Mar 30, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2203/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Endfire linear array microphone systems and methods with consistent directionality and performance at different frequency ranges are provided. The endfire linear array microphone includes a delay and sum beamformer and a differential beamformer. The delay and sum beamformer may produce pickup patterns with good directionality at higher frequency ranges, but cause the pickup patterns to become more omnidirectional at lower frequencies. The differential beamformer may produce pickup patterns with good directionality at lower frequencies. By combining the delay and sum beamformer and differential beamformer within the linear array microphone, the overall directionality of the linear array microphone may be maintained at different frequency ranges while using the same microphone elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.