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Volume 49 Issue 1
Jan.  2024
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WANG Qiumu, LAN Yu, FAN Jun. Design of a low-frequency third-order super-cardioid directional source[J]. ACTA ACUSTICA, 2024, 49(1): 117-128. DOI: 10.12395/0371-0025.2022130
Citation: WANG Qiumu, LAN Yu, FAN Jun. Design of a low-frequency third-order super-cardioid directional source[J]. ACTA ACUSTICA, 2024, 49(1): 117-128. DOI: 10.12395/0371-0025.2022130
shu

Design of a low-frequency third-order super-cardioid directional source

  • 1.

    State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University　Shanghai　200240

  • 2.

    Key Laboratory of Marine Intelligent Equipment and System, Ministry of Education, Shanghai Jiao Tong University　Shanghai　200240

  • 3.

    College of Underwater Acoustic Engineering, Harbin Engineering University　Harbin　150001

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  • PACS: 
    • 43.25  (非线性声学)
  • Received Date: November 10, 2022
  • Revised Date: February 23, 2023
  • Available Online: January 04, 2024
    Graphical Abstract
    • Abstract

  • In order to enhance the directivity gain of the primary pole in a circular array, a third-order super-cardioid sound source based on a uniform six-element circular array is proposed. The beam pattern of the sound source is investigated and analyzed by using the point source method, and an optimal scheme of the sound source is obtained. The single-sided radiation (SSR) flextensional transducer (FT) is selected as the sound source element to minimize the mutual radiation effect of the close-packed array. The acoustic radiation characteristics of the third-order super-cardioid source are studied by the finite element method. The findings demonstrate an 8 dB gain compared to the monopole sound source. A prototype is fabricated and tested. The test results confirm that the directional source exhibits a resonant frequency of 0.92 kHz with a transmitting voltage response of 139.0 dB. The −3 dB beamwidth is 56°, accompanied by all the sidelobes smaller than −15.0 dB. The feasibility of the optimized scheme is verified through the finite element calculations and measured results.

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    • References (18)
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