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Sociedade Brasileira de Telecomunicações

Estimação da orientação de uma fonte acústica direcional com um arranjo de dois microfones


A simple physical model consisting of a point sourcedisplaced from its center of rotation, in combination with adirectivity model that includes backwards emitted energy areconsidered for the problem of estimating the orientation of adirectional acoustic source. We show, however, that when thetime difference of arrival is also taken into account, a smallarray of only two microphones is sufficiently robust againstunaccounted factors such as microphone directivity variationand mild reverberation. This is shown by comparing predictedand measured values of binaural cues, and by using them andpairwise frame energies as inputs for an artificial neural network(ANN) in order to estimate source orientation.

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