The present invention is provided with a first control signal filter (104a) for inputting a cosine wave which oscillates at a control frequency, a second control signal filter (104b) for inputting a sine wave which oscillates at the control frequency, a control signal adder (105) for adding the output of the first control signal filter (104a) and the output of the second control signal filter (104b) and outputting a control signal, a filter coefficient updating unit (106) for updating a filter coefficient of the first control signal filter (104a) and the second control signal filter (104b), and a frequency correction value computing unit (107) for computing a frequency correction value for correcting the control frequency on the basis of the control signal and the control frequency.
Active oscillation noise control device
22.07.2015
Patent
Elektronische Ressource
Englisch
ACTIVE NOISE CONTROL DEVICE, ACTIVE NOISE CONTROL METHOD, AND ACTIVE NOISE CONTROL PROGRAM
Europäisches Patentamt | 2022
|ACTIVE NOISE CONTROL DEVICE, ACTIVE NOISE CONTROL METHOD, AND ACTIVE NOISE CONTROL PROGRAM
Europäisches Patentamt | 2024
|ACTIVE NOISE CONTROL DEVICE, ACTIVE NOISE CONTROL METHOD AND ACTIVE NOISE CONTROL PROGRAM
Europäisches Patentamt | 2022
|