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AssigneesHonda Giken Kogyo Kabushiki Kaisha, Matsushita Electric Industrial Co., Ltd.
InventorsToshio Inoue, Hisashi Sano, Akira Takahashi, Kenichi Terai, Hiroyuki Hashimoto, Isao Kakuhari
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An active noise control system is capable of canceling out noise in the passenger compartment of a vehicle based on low-frequency road noise. The active noise control system has a feed-forward control unit for being supplied with reference signals highly correlated to noise from a noise source and generating a noise cancellation signal which is out of phase to noise in the passenger compartment of the vehicle, and a canceling sound generating unit disposed in the passenger compartment for generating a noise canceling sound in response to the noise cancellation signal from said feed-forward control unit. The active noise control system also has microphones for generating reference signals which are positioned respectively near the base of the front seat, near the center of a roof, and within a trunk compartment, i.e., respectively at vibrational antinodes of a primary or secondary acoustic normal mode of the passenger compartment in the longitudinal direction thereof. Output signals from the microphones are supplied as the reference signals.
An active noise control system comprising:
Dependencies are inferred from the claim text.