Adjusting the beam pattern of a speaker array based on the location of one or more listeners
US10021506B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2014 |
| Grant date | Jul 10, 2018 |
| Priority date | — |
| Expiry date | Mar 4, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2400/01
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A directivity adjustment device that maintains a constant direct-to-reverberant ratio based on the detected location of a listener in relation to the speaker array is described. The directivity adjustment device may include a distance estimator, a directivity compensator, and an array processor. The distance estimator detects the distance between the speaker array and the listener. Based on this detected distance, the directivity compensator calculates a directivity index form a beam produced by the speaker array that maintains a predefined direct-to-reverberant sound energy ratio. The array processor receives the calculated directivity index and processes each channel of a piece of sound program content to produce a set of audio signals that drive one or more of the transducers in the speaker array to generate a beam pattern with the calculated directivity index.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.