| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an active vibration noise control device that reduces an arithmetic operation load of an adaptive FIR filter in generating a control signal and improves convergence. <P>SOLUTION: The adaptive FIR filter 30 outputs a control signal Sc for generating a vibration noise canceling sound CS against the road noise in a predetermined frequency range. The adaptive FIR filter is provided with a frequency switching unit 92 to extract a frequency component of an extraction reference signal Srr from a reference signal Sr using an SAN-type adaptive filter and focuses on the update of a filter coefficient W3 relating to the predetermined frequency component, thereby improving convergence of the vibration noise of a predetermined frequency f by a reduced arithmetic operation load. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
