Aeroacoustic Noise

"Aeroacoustics is a branch of acoustics that studies noise generation via turbulent fluid motion or aerodynamic forces interacting with surfaces.  Noise genertion can also be associated with periodically varying flows.  A notable example of this phenomenom is the Aeolian tones produced by wind blowing over fixed objects.

Although no cmplete scientific theory of the generation of noise by aerodynamic flows has been established, most practical aeroacoustic analysis relies upon the so-called 'aeroacoustic analogy', proposed by Sir James Lighthill in the 1950's while at the University of Manchester, whereby the governing equations of motion of the fluid are coerced into a form reminiscent of the wave equeation of 'classical' (i.e. linear) acoustics in the left- hand side with the remaining terms as sources in the right-hand side." - Wikipedia

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Examples of Aeroacoustic Noise

A. Single Rod demonstration - generation of sound

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Aeroacoustic Sound

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B. Surface and Interaction - generation of sound (TBP)

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C. Cavity Related demonstration - cavity complexities (TBP)

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Understanding wind noise helps us develop the most effective products.