2026-04-14T21:02:09Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/258162025-03-26T16:41:31Zcom_10324_1191com_10324_931com_10324_894col_10324_1381

Izquierdo Fuente, Alberto Villacorta Calvo, Juan José Val Puente, Lara del Suarez Vivar, Luis 2017-09-21T08:58:46Z 2017-09-21T08:58:46Z 2017 Boston MA (USA), 25–29 June 2017 http://uvadoc.uva.es/handle/10324/25816 10.1121/1.4988154 Using arrays with digital MEMS microphones and FPGA-based acquisition/processing systems allows to build systems with hundreds of sensors at a reduced cost. This work analyzes the performance of a virtual array with 6400 MEMS (80 × 80) microphones. The system is composed by a 2D positioning system that places a physical array of 64 microphones (8 × 8) in a grid with 8 x 8 positions, obtaining a spatial aperture of 2 x 2 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 analyzed, since beamforming 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 angular resolutions of the order of tenths of degree. eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Attribution-NonCommercial-NoDerivatives 4.0 International Characterization of a Virtual Array based on MEMS microphones for the analysis of acoustic sources info:eu-repo/semantics/conferenceObject