Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/84512
Title: Modeling the directivity of parametric loudspeaker
Authors: Gan, Woon-Seng
Shi, Chuang.
Issue Date: 2012
Source: Shi, C., & Gan, W. S. (2012). Modeling The Directivity Of Parametric Loudspeaker. NONLINEAR ACOUSTICS State-of-the-Art and Perspectives, 1474, 379-382.
Abstract: The emerging applications of the parametric loudspeaker, such as 3D audio, demands accurate directivity control at the audible frequency (i.e. the difference frequency). Though the delay-and-sum beamforming has been proven adequate to adjust the steering angles of the parametric loudspeaker, accurate prediction of the mainlobe and sidelobes remains a challenging problem. It is mainly because of the approximations that are used to derive the directivity of the difference frequency from the directivity of the primary frequency, and the mismatches between the theoretical directivity and the measured directivity caused by system errors incurred at different stages of the implementation. In this paper, we propose a directivity model of the parametric loudspeaker. The directivity model consists of two tuning vectors corresponding to the spacing error and the weight error for the primary frequency. The directivity model adopts a modified form of the product directivity principle for the difference frequency to further improve the modeling accuracy.
URI: https://hdl.handle.net/10356/84512
http://hdl.handle.net/10220/10101
DOI: http://dx.doi.org/10.1063/1.4749373
Rights: © 2012 American Institute of Physics. This paper was published in NONLINEAR ACOUSTICS State-of-the-Art and Perspectives and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.4749373].  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Conference Papers

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