Patent ID: 7903500
Filing Date: 2011-03-08
Classification: G01S,G03H

Abstract:
1. A device for localizing acoustic sources and measuring their intensities, comprising: an antenna having at least two sub-antennas, each sub-antenna having at least two branches disposed in a cross shape or star shape, each branch being equipped with a plurality of microphones, and a signal processing unit that processes signals coming from the plurality of microphones; to establish, for a frequency higher than a given value f a calculation unit that calculates, for each computation point in the hologram, a sum of acoustic pressures measured by the plurality of microphones in a given sub-antenna, and taking into account a lag in acoustic pressures corresponding to a travel time between the calculation point and the plurality of microphones, multiplying the pressure values obtained by adding the acoustic pressures measured by the microphones of the various sub-antennas for each calculation point of the hologram.