Sound event detection and localization system using power analysis
US7567676B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 2, 2003 |
| Grant date | Jul 28, 2009 |
| Priority date | — |
| Expiry date | Jul 8, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/001
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The beginning detection, accommodation and frequency bias properties of the human hearing mechanism have been modeled to create systems that can detect directional transients (“sound events”) in a sound field and localize them. These systems break down a sound field into sound events and non-sound events and separately localize the sound events and non-sound events. Sound events are generally identified according to the frequency bias and beginning detection properties. Once detected, the sound events are generally localized according to differential steering angles (steering angles to which the steady-state signals have been accommodated) or ordinary steering angles, both of which reflect the direction of a sound event indicated during the rise-time of the sound event. When no sound events are detected, non-sound events are localized according to a steering angle that does not reflect rapid motion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.