Storage System with Noise Reduction

摘要

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.

主权项

1. A method comprising:
rotating, in a storage system, a fan blade of a fan at a spin speed; measuring, by a first sensor, the spin speed; detecting, by a second sensor, a position of the fan blade, wherein the second sensor includes an infrared sensor to emit an infrared signal onto a reflective surface of the fan blade and to receive a reflected infrared signal from the reflective surface when the fan blade passes the infrared sensor; generating, based on the spin speed and the position, an anti-noise waveform that is configured to cause destructive interference with a fan noise of the fan; and outputting an audio signal that corresponds to the anti-noise waveform.