Beamwidth control in parametric acoustic array

Jun Yang; Khim Sia Tan; Woon Seng Gan; Meng Hwa Er; Yong Hong Yan

doi:10.1143/JJAP.44.6817

Beamwidth control in parametric acoustic array

Jun Yang^*, Khim Sia Tan, Woon Seng Gan, Meng Hwa Er, Yong Hong Yan

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

Directional sound can be generated by amplitude-modulating the ultrasound carrier wave with an audio signal and then transmitting it from an array system. On the basis of the analysis of its radiation pattern, an algorithm using delay-and-sum beamforming is proposed to control the beamwidth and sidelobe of demodulated audible sound. Simulation results show that enhanced performance in terms of sidelobe level can be achieved by using the Chebyshev weighting function, compared with the beamforming algorithm without shading.

Original language	English
Pages (from-to)	6817-6819
Number of pages	3
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
Volume	44
Issue number	9 A
DOIs	https://doi.org/10.1143/JJAP.44.6817
Publication status	Published - Sept 8 2005
Externally published	Yes

ASJC Scopus Subject Areas

General Engineering
General Physics and Astronomy

Keywords

Audio beam
Beamwidth control
Chebyshev weighting
Delay-and-sum beamforming
Parametric acoustic array

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10.1143/JJAP.44.6817

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T1 - Beamwidth control in parametric acoustic array

AU - Yang, Jun

AU - Tan, Khim Sia

AU - Gan, Woon Seng

AU - Er, Meng Hwa

AU - Yan, Yong Hong

PY - 2005/9/8

Y1 - 2005/9/8

N2 - Directional sound can be generated by amplitude-modulating the ultrasound carrier wave with an audio signal and then transmitting it from an array system. On the basis of the analysis of its radiation pattern, an algorithm using delay-and-sum beamforming is proposed to control the beamwidth and sidelobe of demodulated audible sound. Simulation results show that enhanced performance in terms of sidelobe level can be achieved by using the Chebyshev weighting function, compared with the beamforming algorithm without shading.

AB - Directional sound can be generated by amplitude-modulating the ultrasound carrier wave with an audio signal and then transmitting it from an array system. On the basis of the analysis of its radiation pattern, an algorithm using delay-and-sum beamforming is proposed to control the beamwidth and sidelobe of demodulated audible sound. Simulation results show that enhanced performance in terms of sidelobe level can be achieved by using the Chebyshev weighting function, compared with the beamforming algorithm without shading.

KW - Audio beam

KW - Beamwidth control

KW - Chebyshev weighting

KW - Delay-and-sum beamforming

KW - Parametric acoustic array

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JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

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ER -

Beamwidth control in parametric acoustic array

Abstract

ASJC Scopus Subject Areas

Keywords

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