Method and system of representing a sound field

Details Method and system of representing a sound field Method and system of representing a sound field

H - Electricity

04

R

H04R 3/00 (2006.01)

Patent

CA 2484588

The invention relates to a method of representing a sound field. The inventive method includes a step involving the acquisition of measurement signals (c¿n?) which are delivered by acquisition means (1) comprising one or more simple sensors (2¿n?) that are exposed to said sound field (P). The invention is characterised in that it comprises: a step involving the determination of encoding filters which are representative of at least the structural characteristics of the aforementioned acquisition means (1); and a step whereby the measurement signals (c¿n?) are processed by applying said encoding filters to the signals (c¿n?), in order to determine a finite number of representative coefficients over time and in the three-dimensional space of the sound field (P), said coefficients being used to produce a representation of the sound field (P) which is essentially independent of the characteristics of the acquisition means (1).

Ce procédé de représentation d'un champ acoustique comprenant une étape d'acquisition de signaux de mesure (cn) délivrés par des moyens d'acquisition (1) formés d'un ou de plusieurs capteurs (2n) élémentaires exposés audit champ acoustique (P), est caractérisé en ce qu'il comporte : - une étape de détermina-tion de filtres d'encodage représentatifs de caractéristiques au moins structurelles desdits moyens d'acquisition (1) ; et - une étape de traitement desdits signaux de mesure (cn) par l'application desdits filtres d'encodage à ces signaux (cn) pour déterminer un nombre fini de coefficients représentatifs dans le temps et dans les trois dimensions de l'espace dudit champ acoustique (P), lesdits coefficients permettant d'obtenir une représentation dudit champ acoustique (P) sensiblement indépendante des caractéristiques desdits moyens d'acquisition (1).

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