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- W2107402981 abstract "In the past two decades, the majority of research on the parametric loudspeaker has concentrated on the nonlinear modeling of acoustic propagation and pre-processing techniques to reduce nonlinear distortion in sound reproduction. There are, however, very few studies on directivity control of the parametric loudspeaker. In this paper, we propose an equivalent circular Gaussian source array that approximates the directivity characteristics of the linear ultrasonic transducer array. By using this approximation, the directivity of the sound beam from the parametric loudspeaker can be predicted by the product directivity principle. New theoretical results, which are verified through measurements, are presented to show the effectiveness of the delay-and-sum beamsteering structure for the parametric loudspeaker. Unlike the conventional loudspeaker array, where the spacing between array elements must be less than half the wavelength to avoid spatial aliasing, the parametric loudspeaker can take advantage of grating lobe elimination to extend the spacing of ultrasonic transducer array to more than 1.5 wavelengths in a typical application." @default.
- W2107402981 created "2016-06-24" @default.
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- W2107402981 date "2011-02-01" @default.
- W2107402981 modified "2023-10-06" @default.
- W2107402981 title "Grating lobe elimination in steerable parametric loudspeaker" @default.
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- W2107402981 doi "https://doi.org/10.1109/tuffc.2011.1821" @default.
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