Using CLEAN-SC for determining the directivity of engine noise sources
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Abstract
The deconvolution method CLEAN-SC is proposed as a tool for analysing engine static tests with far-field microphone arrays. Using measurements on a DGEN380 engine, it was demonstrated that CLEAN-SC is able to make a breakdown of the different engine noise sources (jet, core, bypass, intake) and to determine the far-field directivity of each source. Even the challenging task of separating core noise from jet noise was performed successfully, including the directivity.