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Por favor, use este identificador para citar o enlazar este ítem: http://uvadoc.uva.es/handle/10324/25819
Título: Acoustic sources analysis using a virtual array based on MEMS microphones
Autor: Izquierdo Fuente, Alberto
Villacorta Calvo, Juan José
del Val Puente, Lara
Suarez Vivar, Luis
Suarez, David
Congreso: International Congress on Sound and Vibration (ICSV 24)
Año del Documento: 2017
Descripción Física: 8 p
Descripción: Producción Científica
Documento Fuente: Londres (Reino Unido), 23-27July 2017
Resumen: The use of arrays with digital MEMS microphones and FPGA-based acquisition/processing sys-tems allows building systems with hundreds of sensors at a reduced cost. This work analyses the performance of a virtual array with 1600 MEMS (40 x 40) microphones. The system is com-posed by a 2D positioning system that places a physical array of 64 microphones (8 x 8) in a grid with 5x5 positions, obtaining a spatial aperture of 1x1 meters. The measured beampattern is compared with the theoretical one for several frequencies and pointing angles. The beampattern of the physical array is also estimated for each one of the 64 positions used by the positioning system. Also, the measured beampattern and the focusing capacity are analysed, since beam-forming algorithms assume spherical wave due to the large dimensions of the array. Finally, frequency and spatial responses for a set of different acoustic sources are obtained showing an-gular resolutions of the order of tenths of degree.
Palabras Clave: Virtual array
MEMS microphones
Patrocinador: MINECO/FEDER, UE TEC 2015-68170-R
Idioma: eng
URI: http://uvadoc.uva.es/handle/10324/25819
Derechos: info:eu-repo/semantics/openAccess
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