Quiet system cooling using coupled optimization between integrated micro porous absorbers and rotors

摘要

Micro porous absorber structures that be tuned to attenuate noise at the blade pass frequency (BPF) of a cooling fan. The absorber may comprises a panel covered with micro-porous openings with an air gap under the panel. The size of the air gap may be adjusted dynamically to optimize noise attenuation for a fan operating at different speeds.

主权项

1. An apparatus, comprising:
a blower housing, a cooling fan in the blower housing; a micro-porous panel covering at least part of the blower housing, the micro-porous panel to adsorb noise generated by the blower housing; an air gap between the blower housing and the micro-porous panel; and an actuator to dynamically adjust acoustic properties of the micro-porous panel by raising or lowering the micro-porous panel in a horizontal plane above the blower housing to change the size of the air gap between the blower housing and the micro-porous panel.