Active vibration noise control device, active vibration noise control method and active vibration noise control program

Abstract

An active vibration noise control device obtains error signals corresponding to a cancellation error between vibration noise and control sounds generated by multiple speakers, from microphone(s), and actively controls the vibration noise. A basic signal generating unit generates a basic signal based on a vibration noise frequency. An adaptive notch filter unit generates control signals provided to each of the multiple speakers by applying a filter coefficient to the basic signal. A reference signal generating unit generates a reference signal from the basic signal based on multiple transfer characteristics from the multiple speakers to the one or more microphones. A filter coefficient updating unit updates the filter coefficient used by the adaptive notch filter unit so as to minimize the error signals. A controlling unit changes amplitude of the control signals of the speakers based on a similarity between the transfer characteristics and characteristics of the vibration noise.