Active noise canceller device

An active noise canceller device, reducing spatial noise inside a moving body, comprising:

• a reference signal generation device, generating a reference signal corresponding to a noise;
• a cancellation sound output device, outputting cancellation sound for canceling the noise;
• an error detection device, detecting an error between the noise and the cancellation sound and generating an error signal corresponding to the error;
• and
• a control device, controlling the cancellation sound output device according to the reference signal and the error signal,
• wherein the control device further comprises:
• a reference signal correction part, configured to correct the reference signal;
• a noise estimation part, estimating a sound pressure before controlling a position of the error detection device through the cancellation sound output from the cancellation sound output device and the error signal output from the error detection device;
• a sound pressure estimation part, estimating the sound pressure within an object range of the cancellation sound that cancels the noise;
• and
• a control filter, controlling the cancellation sound, wherein
• the control filter is updated based on the reference signal corrected by the reference signal correction part and a sound pressure estimated value of the sound pressure estimation part,
• wherein the active noise canceller device further comprises:
• a reference distance detection device, configured to detect a reference distance from the cancellation sound output device to a head position of an occupant, wherein
• the sound pressure estimation part sets the object range from the reference distance and updates the control filter.