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:
Apr. 25, 2017
Filed:
Oct. 30, 2015
Netapp, Inc., Sunnyvale, CA (US);
Macen Shinsato, Wichita, KS (US);
Ivan Quiroz, Wichita, KS (US);
Navaneeth Karthikeyan, Wichita, KS (US);
Jonathan Nelson, Wichita, KS (US);
Ryan Binter, Wichita, KS (US);
Phani Durga Siva Sai Venkat Inturi, Wichita, KS (US);
Avinash Gariki, Wichita, KS (US);
Tochukwu Uzokwe, Wichita, KS (US);
NetApp, Inc., Sunnyvale, CA (US);
Abstract
Systems and techniques for cancelling fan noise by providing an anti-noise waveform are disclosed. In some embodiments, the systems and techniques include receiving, at a fan, a pulse width modulated signal from a power supply. A fan blade of the fan is rotated at a spin speed that is measured by a first sensor. A second sensor detects a position of the fan blade. Based on the spin speed and the position, an anti-noise waveform is generated that is configured to cause destructive interference with a fan noise of the fan. An audio signal is output that corresponds to the anti-noise waveform to cause destructive interference with noise caused by the spinning blades of the fan.