University of Twente Student Theses


Active feedback acoustic noise control

Kamphuis, L.R. (2014) Active feedback acoustic noise control.

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Abstract:Active noise control is applied at an air conditioning (AC) air duct with incoming unknown noise from an input speaker, output microphone and a feedback controller. Positioning the speaker downstream to the microphone, according to the flow direction of the incoming sound, a feedback loop can be created. Sound delay will be an issue as introduced by sound traveling over a certain distance in time. In practice, high frequency sounds will be reduced passively by a damper part in the air duct, remaining lower frequencies will be important for the active noise control loop. After identifying the sound paths in the air duct, low order stable feedback controllers can be formed using loop shaping or
Item Type:Internship Report (Master)
University of California San Diego, United States of America
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
Keywords:Feedback control, updating controller, Youla controller
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