自己絤織化マップを用いた乮耳聴モデルによる3次元音源方向定位

摘要

私たち人間は音を聞き，音の発生方向を推定する周rn囲環境認識の能力を持っている．この能力を音源方向rn定位という．これは耳が2つあることにより，両耳間rnで生じた音の到着時間差や．聞こえ方の違いを経験でrn知っているため，可能であるといわれている．本研rn究ではこのような音源方向定位を工学的に実現するこrnとを目的としている．%A sound source direction can be estimated by humans using a time difference between both ears and how a sound is heard, when the sound is generated. However, it is very difficult to create an estimation system by using a computer and two microphones. In this study, we propose a novel sound source direction estimation method, in which the feature difference of observation signals obtained from the two microphones is used. The feature is learned based on the algorithm of the SOM (Self Organizing Maps) and the map of 3-D sound source direction is made. Furthermore, the five kinds of objects sound from each direction are used to conforming experiment and the correct answer rate 98.7% is obtained.