In this paper, a passive fan noise control approach implemented by applying microperforated materials to the shroud of an axial fan will be discussed. Microperforated panels with different flow resistances were compared to an unperforated fan housing. In addition to the shroud treatment, the application of an extended microperforated housing to the inlet-end and outlet end of the fan will be discussed.
axial fan, noise control, microperforated film
Acoustics and Noise Control
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