Localization of an acoustic source
US12025720B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2020 |
| Grant date | Jul 2, 2024 |
| Priority date | — |
| Expiry date | Jun 17, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2430/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Processing sound signals acquired by a microphone, for example an ambisonic type, to locate a sound source in a space including at least one wall. A time-frequency transform is applied to the acquired signals, and, from the acquired signals, a velocity vector, complex with real and imaginary parts, is expressed in the frequency domain, wherein the velocity vector characterizes a composition between: a first acoustic path, direct between the source and the microphone, represented by a first vector; and a second acoustic path resulting from a reflection on the wall and represented by a second vector. The second path has a first delay with respect to the direct path. Depending on the first delay and the first and second vectors, a parameter is determined from among a direction of the direct path, a distance from the source to the microphone, and a distance from the source to said wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.