Source characterization article 2 Acoustic measurements 1 Acoustic noise 1 Acoustic noise measurement 1 Acoustics 1 Aeroacoustics 1 Aeroacoustics applications 1 Beamforming 1 Beamforming technique 1 Distributed sources 1 Drag 1 Engines 1 Equivalent source 1 Fundamental frequencies 1 Good correlations 1 Humans 1 Inverse problems 1 Measurements of 1 Models, Biological 1 Phased-array algorithms 1 Phonation 1 Second harmonics 1 Sound production 1 Source distribution 1 Speech 1 Standard deviation 1 Surrogate measures 1 Trachea 1 Transducers 1