| 摘要 |
A speaker array system for outputting, with a simplified construction, sounds audible with a nearly uniform sound volume within an arbitrarily set area. The speaker array system includes a speaker array having speaker units, a delay unit for supplying the speaker units with delayed audio signals generated by adding delays to an input audio signal, an input unit for inputting area information representing a target area to which an acoustic service is provided using an acoustic beam emitted from the speaker array and which has a normal line extending in a direction different from a normal direction of a speaker surface of the speaker array, and a control unit for calculating delays to be applied to the delay unit. Based on the delays, acoustic waves output from adjacent ones of the speaker units toward the target area are made coincident with each other and an envelope is more distorted from a spherical surface so as to face the target area as the envelope propagates closer to the target area.
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