The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 24, 2006
Filed:
May. 24, 2001
Yoshio Nakamura, Neyagawa, JP;
Toshihiko Ohashi, Hirakata, JP;
Kenichi Terai, Shijonawate, JP;
Hiroyuki Hashimoto, Ibaraki, JP;
Isao Kakuhari, Ikoma, JP;
Hisashi Sano, Wako, JP;
Toshio Inoue, Wako, JP;
Akira Takahashi, Wako, JP;
Tsuyoshi Yamashita, Wako, JP;
Yoshio Nakamura, Neyagawa, JP;
Toshihiko Ohashi, Hirakata, JP;
Kenichi Terai, Shijonawate, JP;
Hiroyuki Hashimoto, Ibaraki, JP;
Isao Kakuhari, Ikoma, JP;
Hisashi Sano, Wako, JP;
Toshio Inoue, Wako, JP;
Akira Takahashi, Wako, JP;
Tsuyoshi Yamashita, Wako, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An active noise control system for reducing road noise of low frequency generated inside the cabin of a vehicle is provided. The active noise control system includes a noise detector, a signal generator for processing the input noise signal to generate a signal for producing noise canceling waves, a limiting amplifier having a specified threshold value for variably amplifying the processed signal so that the amplitude of output signal will not exceed the threshold value, and an electrical acoustic converter for producing noise canceling acoustic waves in accordance with the output signal.