France Telecom

Philippe Derogis

Olivier Warusfel

Rene Causse

To obtain a directivity pattern representing the directivity of an original or virtual sound source, directivity patterns of different sources are composed algebraically. To take account of the progress of the directivity patterns of sources that differ with the frequency, the signals applied to these sources are filtered so that the composite directivity function represents the expected directivity pattern throughout the spectrum. The coefficients of the filters are determined by a method of optimization in modulus and in phase.

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Fondettes, France

Philippe Derogis