ACTIVE NOISE CONTROLLER, ACTIVE NOISE CONTROL PROGRAM, AND ACTIVE NOISE CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To provide an active noise controller with which it is possible to correctly update the filter coefficient of an adaptive filter and reduce vibration on a boundary surface even when the boundary surface is made to vibrate by a sound.SOLUTION: This active noise controller calculates a controlled vibration signal for reducing the vibration outputted from a vibration speaker using the input signal of a microphone and the input signal of a vibration sensor, the active noise controller comprising: a microphone input signal correction unit for correcting the frequency characteristic of input signal of the microphone to the frequency characteristic of the vibration sensor; and an adaptive filter unit for calculating a controlled vibration signal using the input signal of the microphone corrected by the microphone input signal correction unit, the input signal of the vibration sensor and the impulse response of a secondary path leading from the measured vibration speaker to the vibration sensor, and updating the filter coefficient of the adaptive filter.SELECTED DRAWING: Figure 1