Active noise control device

摘要

The active noise control device for canceling out a target sound to be controlled in a target area for sound control includes: control sound output units each of which produces a control sound based on a wavefront control signal; and a wavefront control unit which provides the wavefront control signal to the corresponding one of the control sound output units, and the wavefront control unit generates the wavefront control signal to emit a synthesized sound from a virtual sound source toward the target area for sound control and cancel out the target sound in the target area for sound control, the synthesized sound being a sound synthesized from control sounds produced by the respective control sound output units, and the virtual sound source being located at a predetermined position.

主权项

1. An active noise control device for canceling out a target sound to be controlled in a target area for sound control desired, the active noise control device comprising:
a plurality of control sound output units each configured to produce a control sound based on a wavefront control signal; and a wavefront control unit configured to provide the wavefront control signal to the corresponding one of the control sound output units, wherein the wavefront control unit (i) includes a plurality of control filters each of which performs digital filtering using a filter coefficient for a corresponding one of the control sound output units, and (ii) is configured to generate, by the digital filtering performed by the corresponding one of the control filters, the wavefront control signal to emit a synthesized sound from a virtual sound source toward the target area for sound control and cancel out the target sound in the target area for sound control, the synthesized sound being a sound synthesized from control sounds produced by the respective control sound output units, and the virtual sound source being located at a predetermined position.