Abstract
The predominant acoustic noise sources of electronic systems are very often due to convection cooling devices. A wide range of capacities of air‐moving devices (AMDs) are used in computers and business equipment, typically varying in total flow rate from 0.01 to 1.0 m3/s, and in static pressure drop from 10 to 1000 Pa. This review paper will cover several aspects of air‐moving device noise: (1) basic mechanisms of aerodynamic noise generation, especially in the context of air‐moving device noise, (2) measurement methods of characterizing aeroacoustic noise sources on airfoils immersed in turbulence, (3) important parameters in assessing aeroacoustic performance, (4) standardized measurement methods for determining noise emission levels of AMDs; (5) use of sound power levels of AMDS for predicting overall system noise levels; and (6) nonstandardized measurement methods for quantifying air‐moving devices based on sound intensity techniques.
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