Studies of Mechanism of Obstacle Perception

Relation between direction of sound and coloration

There are Contents of study, and References.

Contents of study

Coloration is the phenomenon that listener perceive the timbre change when the direct and reflected sounds influenced each other, and is one of the minor factors of the obstacle perception.

Conventional studies have not investigated the relation between the directions of the sounds to the head and perceived coloration well.

Yoshikazu Seki investigated their relation with various directions. The results suggested that perception rate of coloration is depending on the sound direction. (Fig. 1)

Yoshikazu Seki considered why the rate is depending on the direction, and presumed that it is because of the difference of area of comb structure on the spectrum depending on direction. The results of graph that shows relation between area of comb structure and perception rate of coloration suggested that they have linear relation. (Fig. 2)

This study revealed the relation between the directions of the sounds and coloration, and the results can explain the perception rate of coloration by the numerical model.

* Fig. 1, 2 of this page were re-made by Yoshikazu Seki for this web page. They are not copies from the following reference. The copyright of these figures is reserved by Yoshikazu Seki.

Reference

• Yoshikazu SEKI, Kiyohide ITO, Coloration Perception depending on Sound Direction, IEEE Transactions on Speech & Audio Processing 11 (6), 817-825 (2003).