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:
Dec. 05, 2017
Filed:
Dec. 08, 2014
Ford Global Technologies, Llc, Dearborn, MI (US);
University of Cincinnati, Cincinnati, OH (US);
Ming-Ran Lee, Troy, MI (US);
Takeshi Abe, Garden City, MI (US);
Ming-te Cheng, Ann Arbor, MI (US);
Frederick Wayne Vanhaaften, Northville, MI (US);
Liqun Na, Northville, MI (US);
Teik Lim, Mason, OH (US);
Mingfeng Li, Cincinnati, OH (US);
Guohua Sun, Cincinnati, OH (US);
Tao Feng, Cincinnati, OH (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
An active noise control (ANC) system includes a speaker and one or more processors programmed to implement a delayless subband filtered-x least mean square control algorithm. The algorithm includes a variable bandwidth discrete Fourier transform filter bank having a number of subbands such that the system, in response to a broadband white noise reference signal indicative of road noise in the vehicle, exhibits a uniform gain spectrum across a frequency range defined by the subbands and partially cancels the road noise via output of the speaker.