Predicting Turbulent Decorrelation in Acoustic Phased Arrays

Pires, Leo S; Dougherty, Robert P.; Gerges, Samir N. Y.; Catalano, Fernando Martini; Carlos, São

doi:10.2514/6.2012-387

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Microphone Weighting and Coherence Loss1

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Cited by 14 publications

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“…Decorrelation, however, results in both a loss of image resolution and a corruption of the sound levels in the source map. The influence of decorrelation can be estimated by means of an analytical model where the shear (or boundary) layer is modeled as a random medium with a single length scale [57,91,92]. In Fig.…”

Section: Microphone Weighting and Coherence Lossmentioning

confidence: 99%

A review of acoustic imaging methods using phased microphone arrays

et al. 2019

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Phased microphone arrays have become a well-established tool for performing aeroacoustic measurements in wind tunnels (both open-jet and closed-section), flying aircraft, and engine test beds. This paper provides a review of the most wellknown and state-of-the-art acoustic imaging methods and recommendations on when to use them. Several exemplary results showing the performance of most methods in aeroacoustic applications are included. This manuscript provides a general introduction to aeroacoustic measurements for non-experienced microphone-array users as well as a broad overview for general aeroacoustic experts.

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Section: Microphone Weighting and Coherence Lossmentioning

confidence: 99%