Interference suppression techniques

H - Electricity – 04 – R

Patent

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Details

H04R 3/00 (2006.01) H04R 25/00 (2006.01)

Patent

CA 2407855

System (10) is disclosed including an acoustic sensor array (20) coupled to processor (42). System (10) processes inputs from array (20) to extract a desired acoustic signal through the suppression of interfering signals. The extraction/suppression is performed by modifying the array (20) inputs in the frequency domain with weights selected to minimize variance of the resulting output signal while maintaining unity gain of signals received in the direction of the desired acoustic signal. System (10) may be utilized in hearing aids, voice input devices, surveillance devices, and other applications.

L'invention concerne un système (10) comprenant un réseau de capteurs acoustiques (20) couplé à un processeur (42). Le système (10) traite des entrées provenant du réseau (20) de manière à extraire un signal acoustique recherché en supprimant des signaux d'interférence. On effectue l'extraction/suppression en modifiant les entrées du réseau (20) dans le domaine fréquence au moyen de masse sélectionnées en vue de minimiser une variance du signal de sortie obtenu, tout en conservant un gain unité des signaux reçus dans le sens du signal acoustique recherché. Le système (10) peut être mis en oeuvre dans des appareils auditifs, des dispositifs d'entrées vocales, des dispositifs de surveillance et d'autres applications.

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