Beamforming for measurements under disturbed propagation conditions using numerically calculated Green’s functions
نویسندگان
چکیده
Beamforming methods for sound source localization are usually based on free-field Green’s functions to model the propagation between and microphones. This assumption is known be incorrect many industrial applications beamforming results can suffer from this inconsistency regarding both, main lobe width dynamic range. The aim of paper investigate whether use numerically calculated functions, which include diffraction reflection path microphones, improve measurements. current test cases numerical experimental investigations consist a placed in short rectangular duct. measurements performed outside duct semi-anechoic chamber. A typical example kind installation fan with heat exchanger. case using boundary element method. These tailored used calculate corresponding steering vectors. loudspeaker mounted disc as reference exchanger both stationary rotating disc. evaluated frequency domain. For evaluation measurements, new method time domain presented. also uses were It shown how weighting these done beamforming. By means different validation criteria it that improved compared free field true case.
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ژورنال
عنوان ژورنال: Journal of Sound and Vibration
سال: 2022
ISSN: ['1095-8568', '0022-460X']
DOI: https://doi.org/10.1016/j.jsv.2021.116638