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:
Mar. 19, 1985
Filed:
Jun. 29, 1983
Applicant:
Inventor:
Shinichi Matsui, Yokosuka, JP;
Assignee:
Nissan Motor Company, Limited, Yokohama, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
381 71 ; 381 86 ;
Abstract
The major resonance noise inducing engine vibration component is determined by sensing the ignition pulses produced by the engine ignition system and compared with pre-stored data to ascertain if cabin resonance is apt to occur. In the event that resonance is predicted counter vibration is produced by a speaker or speakers. In addition to the basic engine speed parameter, the load on the engine (e.g. throttle valve position, induction vacuum or the like) and the gear ratio in which the transmission is operating may also be sensed to determine the need for the counter vibration.