Abstract
The direction of a generated sound source can be estimated by humans using the time difference between both ears and the characteristics of the sound. However, it is very difficult to create an estimation system using a computer and two microphones. Aims of this study are the achievement of three dimension sound localization with two microphones. We have developed the sound source direction estimation system, in which the sound source direction can be shown by two angles, the horizontal angle α and the vertical angle, β. The former is presumed from the difference of the arrival time when the sound progresses from the source to right and left ear, and the latter is presumed from spectrum correlation analysis using head related transfer function (HRTF). In this study, we propose a novel sound source direction estimation method, in which the feature difference of two recorded microphone signals is used. As a result, an average correct estimation rate of 96% was obtained in determining the location of 11 kinds of object sounds.
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