| 摘要 |
<p>PURPOSE:To faciliate the fine division setting of a cross-over frequency and a signal delay time, etc., by storing plural kinds of parameter information necessary for variable-controlling a delay time into a storing part and driving plural loudspeakers with delaying signals for respective systems, respectively. CONSTITUTION:The parameter information necessary for the variable control of the delay time is memorized into a storing part 18 composed of a ROM, etc. To plural loudspeakers 15, for a listening point 22, in making a loudspeaker 15a located at a most distant point into a reference, by a sound wave propagation time corresponding to distance differences (x), (y) and (z) mutually among them, signals to drive loudspeakers 15b-d are delayed by delaying parts 12b-d. Then, the phases of sound waves generated by respective loudspeakers 15a-d to be received at the listening point are made even. At such a time, by setting many kinds of parameter information corresponding to the delay times to the storing part 18, the fine adjustment of a signal delay time can be executed. As a result, the wave front of an arriving sound wave to the listening point 22 can be correctly adjusted.</p> |
