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Measurement of the Noise of Ducted Fans
The Journal of the Acoustical Society of America, 1956A proposed technique for measuring the noise of a ducted fan by means of a microphone placed inside the fan duct was evaluated by comparing results so obtained with those obtained by measuring the total sound energy radiated from the duct into a reverberation chamber. A suitable microphone windscreen was developed and was used to reduce the aerodynamic
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Acoustic noise control for fans
The Journal of the Acoustical Society of America, 1989Apparatus for the abatement of noise from cooling fans primarily in computer and business equipment. Noise of mechanical origin is reduced by damping the fan casing, by mass-loading the casing (at low frequencies), by isolating the casing from its surrounds, and by absorbing some of the noise as it is radiated from the fan casing.
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Fan noise prediction for design.
The Journal of the Acoustical Society of America, 2010This paper develops a fan noise prediction model intended for use in the design of systems for cooling and drying. Airflow through a system is described by a dimensionless resistance parameter. Fan noise is predicted by a scaling relationship obtained from a dimensional solution of Lighthill’s acoustic analogy. The scaling relationship contains unknown
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Quadrupole noise simulation for fan noise prediction
2007NA
Ghorbaniasl, Ghader +2 more
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An overview of testing methods for aeroengine fan noise
Progress in Aerospace Sciences, 2021Huanxian Bu, Xun Huang, Xin Zhang
exaly