Print Email Facebook Twitter Uniaxial Acoustic Vector Sensors for direction-of-arrival estimation Title Uniaxial Acoustic Vector Sensors for direction-of-arrival estimation Author Nambur Ramamohan, K. (TU Delft Signal Processing Systems; Microflown Technologies) Comesaña, Daniel Fernandez (Microflown Technologies) Leus, G.J.T. (TU Delft Signal Processing Systems) Date 2018 Abstract In this paper, a specific reduced-channel Acoustic Vector Sensor (AVS) is proposed comprising one omni-directional microphone and only one particle velocity transducer, such that it can have an arbitrary orientation. Such a reduced transducer configuration is referred to as a Uniaxial AVS (U-AVS). The DOA performance of an array of U-AVSs is analyzed through its beampattern and compared to conventional configurations. It is shown that the U-AVS array beampattern results in an asymptotically biased estimate of the source location and it can be varied by choosing the orientation angles of the particle velocity transducers. Analytical expressions for the asymptotic bias of classical beamforming are proposed and verified both numerically as well as experimentally for Uniform Linear Arrays (ULAs). Furthermore, the Cramér-Rao Bound (CRB) and Mean Square Error (MSE) expressions are derived for a U-AVS array under a single source scenario and they are numerically evaluated for ULA. The implications of changing the orientations of the U-AVSs in the array on the MSE are discussed as well. Subject Acoustic Vector Sensor (AVS)Array processingBeampatternCramér-Rao Bound (CRB)Direction-of-Arrival (DOA)Mean Square Error (MSE) To reference this document use: http://resolver.tudelft.nl/uuid:9a666c46-6e53-466d-adf1-9424c07d6cb2 DOI https://doi.org/10.1016/j.jsv.2018.08.031 Embargo date 2019-03-05 ISSN 0022-460X Source Journal of Sound and Vibration, 437, 276-291 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2018 K. Nambur Ramamohan, Daniel Fernandez Comesaña, G.J.T. Leus Files PDF 1_s2.0_S0022460X18305364_main.pdf 2.24 MB Close viewer /islandora/object/uuid:9a666c46-6e53-466d-adf1-9424c07d6cb2/datastream/OBJ/view