3D-Biaural Localization of A Stationary Random Acoustical Source in Near-Field by Using Amplitude Attenuation of Wave Propagation and An Additional Rotation of Detectors

Abstract

With the aims of exploring humankind's biaural localization ability as well as developing refined devices for environmental recognition in robotics, a practical method for 3D-biaural localization of a stationary random acoustical source in near-field is proposed by newly introducing a rotation of detectors, in addition to the previously proposed method using amplitude attenuation as well as the conventional relative time delay between detected signals. The principle of the proposed 3D-localization and theoretical evaluation of the position estimate deriverd from auto- and cross-spectral analyses of detected signals are presented, together with the results of numerical analysis, illustrating the effectiveness as well as fundamental characteristics of this method under practical circumstances.