Active vibration/noise control apparatus

摘要

A control signal filter 2 receives a sound source signal determined by a control frequency specified in conformity with the vibration/noise source that produces vibration/noise, and outputs a control signal. A filter coefficient update unit 4 updates coefficients of the control signal filter 2 in response to a sound source signal and an error signal. A signal-to-interference ratio measuring unit 5 outputs a signal-to-interference ratio determined from the vibration/noise and the interference contained in the error signal in response to the control frequency and error signal. An update controller 6 adjusts an update step of the filter coefficient update unit 4 in accordance with the signal-to-interference ratio.

主权项

1. An active vibration or noise control apparatus comprising:
a control signal filter that receives a sound source signal determined from control frequency specified in conformity with a vibration or noise source which produces vibration or noise and that outputs a control signal; a filter coefficient updater that updates coefficients of the control signal filter in response to an error signal and the sound source signal, the error signal resulting from interference between the vibration or noise and secondary vibration or noise generated from the control signal; a signal-to-interference ratio measurer that determines a signal-to-interference ratio from the vibration or noise and interference contained in the error signal in response to the control frequency and the error signal, and outputs the signal-to-interference ratio; and an update controller that adjusts an update step of the filter coefficient updater in conformity with the signal-to-interference ratio.