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• W2017443071 abstract "Phased microphone arrays are used in a variety of applications for the estimation of acoustic source location and spectra. The popular conventional delay-and-sum beamforming methods used with such arrays suffer from inaccurate estimations of absolute source levels and in some cases also from low resolution. Deconvolution approaches such as DAMAS have better performance, but require high computational effort. A fast beamforming method is proposed that can be used in conjunction with a phased microphone array in applications with focus on the correct quantitative estimation of acoustic source spectra. This method bases on an eigenvalue decomposition of the cross spectral matrix of microphone signals and uses the eigenvalues from the signal subspace to estimate absolute source levels. The theoretical basis of the method is discussed together with an assessment of the quality of the estimation. Experimental tests using a loudspeaker setup and an airfoil trailing edge noise setup in an aeroacoustic wind tunnel show that the proposed method is robust and leads to reliable quantitative results." @default.
• W2017443071 created "2016-06-24" @default.
• W2017443071 creator A5068760405 @default.
• W2017443071 date "2010-04-01" @default.
• W2017443071 modified "2023-10-16" @default.
• W2017443071 title "A fast signal subspace approach for the determination of absolute levels from phased microphone array measurements" @default.
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• W2017443071 doi "https://doi.org/10.1016/j.jsv.2009.11.009" @default.
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