Gradient directional microphone system and method therefor

Details Gradient directional microphone system and method therefor Gradient directional microphone system and method therefor

H - Electricity

04

R

H04R 1/40 (2006.01)

Patent

CA 2150819

A gradient directional microphone system (100) and method therefor includes three microphones (101, 103, 105) and a processor (107). Each of the three microphones (101, 103, 105) have substantially the same gradient order (135, 137, 139) and frequency response. Each microphone produces an electrical signal (109, 111, 113) that is responsive to sound pressure (119, 121, 123) at each microphone (101, 103, 105). The processor (107) is coupled to receive the electrical signal (109, 111, 113) from each microphone (101, 103, 105), and operative to produce an output signal (131) for the gradient directional microphone system (100) having a gradient order (141) at least two gradient orders higher than the gradient order (135, 137, 139) of each of the three microphones (101, 103, 105). Using the present invention, the size and complexity of the gradient directional microphone system (100) is substantially reduced over that of the prior art.

L'invention concerne un procédé et un système de microphone directionnel (100) comportant trois microphones (101, 103, 105) et un processeur (107). Ces trois microphones (101, 103, 105) présentent chacun un ordre de gradient de pression (135, 137, 139) et une réponse en fréquence identiques. Chaque microphone produit un signal électrique (109, 111, 113) sensible à la pression acoustique (119, 121, 123) au niveau de chaque microphone (101, 103, 105). Le processeur est couplé (107) de sorte qu'il reçoive le signal électrique (109, 111, 113) envoyé par chaque microphone (101, 103, 105). Il est, de plus, conçu pour produire un signal de sortie (131) pour le système de microphone (100) présentant un ordre de gradient (141) d'au moins deux ordres de gradient supérieur à celui (135, 137, 139) des trois microphones (101, 103, 105). Grâce au système et au procédé selon l'invention, la taille et la complexité du système de microphone directionnel à gradient de pression (100) sont nettement réduites par rapport aux anciens systèmes.

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