Transtron Inc.

Ryota Okawa

An active noise control device includes an adaptive filter that generates a control signal based on a vibration frequency generated by a vibration source and sequentially updating the adaptive filter, a reference signal generation device that generates a reference signal, an amplitude characteristic calculation device that acquires an acoustic characteristic including amplitude and phase information, the acoustic characteristic being an acoustic characteristic of a secondary path between a speaker and a microphone and calculating an amplitude characteristic of the secondary path, a smoothed signal generation device having a low-pass filter, a correction coefficient calculation device that calculates a correction coefficient according to a frequency, an adaptive filter update device that updates the adaptive filter by subtracting an update term including the correction coefficient from a first adaptive filter coefficient that is an immediately preceding adaptive filter coefficient, and a control signal generation device that generates the control signal.

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Yokohama, Japan

Ryota Okawa