How to reduce wind-induced noise has been a common design challenge for portable communication products (2-way radios, cellular phone, etc.). The present work aims at developing advanced, generic, physics-based numerical algorithms that can beused to minimize the wind-induced noise by optimizing the housing cavity geometry portable radios. A three-dimensional numerical model that combines direct numerical simulation of the boundary-layer shear flow, the flow-acoustic coupling and acousticnoise analysis has been developed and used for estimating the noise level for given microphone cavity geometry design. In this model, noise is induced inside the microphone cavity which is subjected to a boundary-layer shear flow. This simulation modelhas been used for: (1) studying the noise sensitivity in terms of the cavity geometry changes; (2) exploring various cavity design alternatives based on wind-induced noise issue; and (3) optimizing microphone cavity housing design for minimizingwind-induced noise level.
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