Patent ID: 8233633

Claim:
A noise control device that transmits a noise outputted from a noise source via a noise transfer system and synthesizes the transmitted noise and a control sound at a control point to thereby reduce the noise, the noise control device comprising: a signal processor that detects the noise outputted from the noise source, and generates a control signal based on the noise; a control acoustic system that generates the control sound for canceling the noise; and an output correction section that corrects the control signal outputted from the signal processor, in a frequency band for which a noise control process time τ, which is a time period from when the noise is outputted from the noise source to pass through the signal processor and the control acoustic system to when the control sound reaches the control point, is larger than a noise transfer time T, which is a time period from when the noise is outputted from the noise source to when the noise reaches the control point via the noise transfer system (τ>T), wherein the control acoustic system generates the control sound based on the control signal outputted from the signal processor or the corrected control signal outputted from the output correction section, and the transmitted noise and the control sound generated by the control acoustic system are synthesized at the control point.