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:
Sep. 03, 2013
Filed:
Mar. 04, 2008
Kosuke Sakamoto, Wako, JP;
Toshio Inoue, Wako, JP;
Akira Takahashi, Wako, JP;
Yasunori Kobayashi, Wako, JP;
Kosuke Sakamoto, Wako, JP;
Toshio Inoue, Wako, JP;
Akira Takahashi, Wako, JP;
Yasunori Kobayashi, Wako, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
An active sound control apparatus includes a delay circuit for delaying the output of a frequency component of a sound effect by delaying an engine rotation frequency signal representative of an engine rotation frequency [Hz], a delay circuit for delaying the output of an amplitude component of the sound effect by delaying an engine rotation frequency change signal representative of an engine rotation frequency change [Hz/second], and delay circuits for delaying the output of all components of the sound effect by delaying a control signal for controlling the outputs of speakers.