Estimation of Sound Source Direction Using Parabolic Reflection Board
Tetsuya Takiguchi, Ryoichi Takashima, Yasuo Ariki · 2008
This paper presents a new sound-source-direction estimation method using only a single microphone with a parabolic reflection board. In our previous work [ 1], we proposed GMM (Gaussian Mixture Model) separation for estimation of the sound source direction, where the observed (reverberant) speech is separated into the acoustic transfer function and the clean speech GMM. However, the previous method required the measurement of speech for each room environment in advance. The new proposed method using the parabolic reflection is able to estimate the sound source direction without any measurement in advance. Its effectiveness is confirmed by sound-source-direction estimation experiments in a room environment.