A generic-silenced axial fan based on a dual ANC system
While implementing Active Noise Control (ANC) systems to axial fans, whether to both intake and output or to only one of the openings, a Sound Power Level (SWL) active reduction of 7.8 dB was demonstrated, in addition to 3.3 dB of passive reduction. This generic unit produces a low
level of noise compared to an axial fan with the same capacity of airflow and same dimensions. Also the duct encasing the axial fan offers better peak efficiency (higher stall point) in the Fan Performance Curve (FPC), therefore yielding an air-moving device which can cope better with higher
system resistance. The generic unit can be used with any mechanical system that requires airflow induction, such as computers, air conditioners and machines.
Document Type: Research Article
Publication date: July 1, 2009
NCEJ is the pre-eminent academic journal of noise control. It is the Journal of the Institute of Noise Control Engineering of the USA. Since 1973 NCEJ has served as the primary source for noise control researchers, students, and consultants.
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