| 摘要 |
PROBLEM TO BE SOLVED: To make a direction toward a listener constant or to make a relative direction constant, independently of the fluctuations in the direction of the listener. SOLUTION: First and second transfer functions hL(k), hR(k) between a loudspeaker 12 and left right ears of a listener 11 are estimated, the transfer function hR(k) is convoluted on a right channel sound xL(k), and the transfer function hL(k) is convoluted on a left channel sound xR(k), a value of hR(k)×xL(k)-hL (k)×xR(k) is fed to a sound source 14L near the left ear of the listener 11, and a value of hL(k)×xR(K)-hL(k)×xL(k)is fed respectively to a headphone 14L(14R) of a left (right) ear, in which the direction the listener 11 is directed from the speaker 12 based on the time difference between the hL(k) and hR(k) is read and a signal selection section 28 for left/right channel fed to the speaker and interrupt control with respect to the headphones 14L, 14R are conducted in accordance with the read result. |
