| 摘要 |
PROBLEM TO BE SOLVED: To obtain a control effect which natural in listening, when a target characteristic is changed when a sound transmission characteristic of a sound is controlled at a control point in a reproduction sound field to a target characteristic. SOLUTION: A target characteristic update control means 114 divides a target characteristic from a current characteristic to a final characteristic into plural target characteristics, so as to reduce a revision amount upon the receipt of a control signal to revise the target characteristic and changes the target characteristic in a timing set by an output signal of a control error sum from an adder 115 and an output signal of a counter 118 counting number of times of coefficient update of adaptive finite impulse response FIR filters 102, 103. Thus, a sudden increase in control error due to the large change in the target characteristics is prevented, and sound field control which is natural in listening is realized. |
