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BROADBAND DIRECTION ESTIMATION METHOD UTILIZING COMBINED PRESSURE AND ENERGY GRADIENTS FROM OPTIMIZED MICROPHONE ARRAY

Microphone Array Signal Processing

Full Paper at IEEE Xplore

Presented by: Jukka Ahonen, Author(s): Jukka Ahonen, Ville Pulkki, Aalto University, Finland

This paper proposes a method for analyzing the direction of the arrival of sound by estimating the sound intensity vector from the pressure and energy gradients of closely-spaced omnidirectional microphones depending on frequency. Microphones with relatively large housing, which cause shadowing, are used here to provide inter-microphone level differences in order to compute the energy gradients at high frequencies. The proposed method is evaluated in the direction analysis of a spatial-sound processing technique, Directional Audio Coding (DirAC). It is shown that the method provides a reliable direction estimation at the entire audio frequency range, whereas the traditional method employing the pressure gradients produces correct estimation in a limited frequency window only.

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  Lecture Information

Recorded: 2011-05-27 13:45 - 14:05, Club D
Added: 19. 6. 2011 23:56
Number of views: 36
Video resolution: 1024x576 px, 512x288 px
Video length: 0:16:12
Audio track: MP3 [5.46 MB], 0:16:12