Beampattern design for the parametric array loudspeaker using mixed Gaussian directivity method
Beampattern design for the parametric array loudspeaker using mixed Gaussian directivity method
The parametric array loudspeaker (PAL) uses an array of ultrasonic transducers to transmit inaudible ultrasonic frequencies into air, in order for an audible difference frequency to be produced by the parametric acoustic array effect. The PAL is advantageous in possessing a much narrower sound beam as compared to the conventional loudspeaker with the same size. The beampattern of the PAL is described by the convolution model that the directivity of the difference frequency is calculated by the convolution between the Westervelt's directivity and the product directivity of the ultrasonic frequencies. Previous beampattern design methods of the PAL have failed to consider the effect of the Westervelt's directivity. This paper proposes to use the mixed Gaussian directivity method to approximate the Westervelt's directivity, such that the convolution model can be analytically decomposed into solvable equations. A beampattern design method is therefore established and then validated by k-wave numerical simulations.
3665-3672
Institute of Noise Control Engineering of the USA
Gou, Jiacheng
4f92c3b1-a1a8-4cf4-805b-4cba2852561d
Liang, Jiangnan
a42f52fd-6d3f-4466-85a4-9a97f17aba4d
Bai, Ruyu
110b5d6f-cef7-4420-af12-0f5a608e106e
Shi, Chuang
c46f72bd-54c7-45ee-ac5d-285691fccf81
12 October 2020
Gou, Jiacheng
4f92c3b1-a1a8-4cf4-805b-4cba2852561d
Liang, Jiangnan
a42f52fd-6d3f-4466-85a4-9a97f17aba4d
Bai, Ruyu
110b5d6f-cef7-4420-af12-0f5a608e106e
Shi, Chuang
c46f72bd-54c7-45ee-ac5d-285691fccf81
Gou, Jiacheng, Liang, Jiangnan, Bai, Ruyu and Shi, Chuang
(2020)
Beampattern design for the parametric array loudspeaker using mixed Gaussian directivity method.
In InterNoise 2020: INTER-NOISE and NOISE-CON Congress and Conference Proceedings.
vol. 2990-3981,
Institute of Noise Control Engineering of the USA.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
The parametric array loudspeaker (PAL) uses an array of ultrasonic transducers to transmit inaudible ultrasonic frequencies into air, in order for an audible difference frequency to be produced by the parametric acoustic array effect. The PAL is advantageous in possessing a much narrower sound beam as compared to the conventional loudspeaker with the same size. The beampattern of the PAL is described by the convolution model that the directivity of the difference frequency is calculated by the convolution between the Westervelt's directivity and the product directivity of the ultrasonic frequencies. Previous beampattern design methods of the PAL have failed to consider the effect of the Westervelt's directivity. This paper proposes to use the mixed Gaussian directivity method to approximate the Westervelt's directivity, such that the convolution model can be analytically decomposed into solvable equations. A beampattern design method is therefore established and then validated by k-wave numerical simulations.
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Published date: 12 October 2020
Identifiers
Local EPrints ID: 484134
URI: http://eprints.soton.ac.uk/id/eprint/484134
ISSN: 0736-2935
PURE UUID: 76d9ffde-e1e6-440c-b10a-54bacae84e92
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Date deposited: 10 Nov 2023 18:03
Last modified: 18 Mar 2024 04:13
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Contributors
Author:
Jiacheng Gou
Author:
Jiangnan Liang
Author:
Ruyu Bai
Author:
Chuang Shi
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