Patent ID: 8705760

Claim:
An active noise control device that attenuates a first sound in a first region, the first sound being radiated from a speaker, the active noise control device comprising: a vibrating section, spatially located at one side of the active noise control device and the speaker being spatially located at an opposite side of and facing against the active noise control device with respect to the vibrating section so that the vibrating section is spatially behind the speaker and the first region is spatially behind the vibrating section, radiating, by vibrating the vibrating section in accordance with a control signal, a second sound toward the first region, and a third sound toward a second region that is spatially in front of the speaker, the third sound in the second region being radiated in a phase that is opposite to a phase of the second sound in the first region; a signal obtaining section, electrically coupled to the speaker, obtaining an electric signal relating to the first sound and inputted to the speaker; and a control section, coupled to the signal obtaining section and the vibrating section, adjusting, based on previously stored control parameters, an amplitude and a phase of the electric signal obtained by the signal obtaining section to produce an adjusted electric signal and outputting, to the vibrating section, the adjusted electric signal as the control signal so that the first sound in the first region is attenuated by the second sound in the first region and that a synthesized sound of the first sound and the third sound in the second region has a desired frequency characteristic.