公开(公告)号：US20170122340A1

公开(公告)日：2017-05-04

申请号：US14928139

申请日：2015-10-30

Applicant: NetApp, Inc.

Inventor： Macen Shinsato ,  Ivan Quiroz ,  Navaneeth Karthikeyan ,  Jonathan Nelson ,  Ryan Binter ,  Phani Durga Siva Sai Ven lnturi ,  Avinash Gariki ,  Tochukwu Uzokwe

IPC: F04D29/66 ,  F04D27/00 ,  F24F13/24 ,  F04D29/38

CPC classification number: F04D29/665 ,  F04D19/002 ,  F04D27/001 ,  F04D29/38 ,  F24F13/24 ,  F24F2013/247 ,  G11B33/08

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.

公开(公告)号：US09631639B1

公开(公告)日：2017-04-25

申请号：US14928139

申请日：2015-10-30

Applicant: NetApp, Inc.

Inventor： Macen Shinsato ,  Ivan Quiroz ,  Navaneeth Karthikeyan ,  Jonathan Nelson ,  Ryan Binter ,  Phani Durga Siva Sai Venkat Inturi ,  Avinash Gariki ,  Tochukwu Uzokwe

IPC: A61F11/06 ,  F04D29/66 ,  F04D29/38 ,  F04D27/00 ,  F24F13/24

CPC classification number: F04D29/665 ,  F04D19/002 ,  F04D27/001 ,  F04D29/38 ,  F24F13/24 ,  F24F2013/247 ,  G11B33/08

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.