Q: Is there a simple way to suppress noise emitted by an axial flow fan?
A: Normally, fan noise decreases as fan speed decreases. Axial flow fans are available in three speed types, standard, middle speed and low speed. Noise can be reduced by using middle speed or low speed fans. For example, to reduce noise while obtaining the same airflow as a standard speed fan, a large-sized middle speed or low speed fan should be used.
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