RT info:eu-repo/semantics/conferenceObject
T1 Acoustic sources analysis using a virtual array based on MEMS microphones
A1 Izquierdo Fuente, Alberto
A1 Villacorta Calvo, Juan José
A1 Val Puente, Lara del
A1 Suarez Vivar, Luis
A1 Suarez, David
K1 Virtual array
K1 MEMS microphones
AB 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.
YR 2017
FD 2017
LK http://uvadoc.uva.es/handle/10324/25819
UL http://uvadoc.uva.es/handle/10324/25819
LA eng
NO Londres (Reino Unido), 23-27July 2017
NO Producción Científica
DS UVaDOC
RD 24-nov-2024