Design of wideband class IV flextensional hydrophone structure

Gihyeon Kim; Yongrae Roh

doi:10.7776/ASK.2025.44.5.450

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2025 Vol.44, Issue 5 Preview Page Next Page

Research Article

Design of wideband class IV flextensional hydrophone structure 광대역 class IV 플렉스텐셔널 하이드로폰 구조 설계

30 September 2025. pp. 450-457

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Abstract

Class IV flextensional transducers, which have been primarily employed for transmission, exhibit high sensitivity characteristics when utilised as hydrophones, attributable to the substantial mechanical amplification effect and the reciprocity of the piezoelectric effect. The present study has been conducted with the objective of developing a class IV flextensional hydrophone that possesses both high sensitivity and a wide bandwidth in the low frequency range. The influence of structural variables on the acoustic performance was evaluated through finite element analysis, with the receiving voltage sensitivity and fractional bandwidth established as the primary performance indicators. Subsequently, regression analysis and optimization algorithms were employed to derive the optimal structure. The final model exhibited a 21 %p increase in bandwidth while maintaining the same receive voltage sensitivity in the low frequency range compared to the basic model.

Keywords

Class IV flextensional hydrophone

Wideband

Receiving voltage sensitivity

Finite Element Method (FEM)

주로 송신용으로 사용되어 온 class IV 플렉스텐셔널 트랜스듀서는 높은 기계적 증폭 효과와 압전 효과의 가역성으로 인해 하이드로폰으로 사용 시 고감도 특성을 가질 수 있다. 이러한 특성을 응용하여 본 연구는 저주파 구간에서 고감도와 넓은 대역폭을 가지는 class IV 플렉스텐셔널 하이드로폰을 개발하고자 하였다. 수신 전압 감도와 비대역폭을 주요 성능 지표로 설정하여 유한요소해석을 통해 구조 변수가 음향 성능에 미치는 영향을 평가하였다. 그리고 회귀 분석, 최적화 알고리즘을 사용하여 최적 구조를 도출하였으며, 최종 모델은 기본모델에 비해 저주파 구간의 수신 감도는 대등하면서 비대역폭은 21 %p 증가하였다.

키워드

클래스 IV 플렉스텐셔널 하이드로폰

광대역

수신전압감도

유한요소법 (Finite Element Method, FEM)

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Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 44
No :5
Pages :450-457
Received Date : 2025-07-15
Accepted Date : 2025-09-02
DOI :https://doi.org/10.7776/ASK.2025.44.5.450

The Journal of the Acoustical Society of KoreaISSN:1225-4428(Print) 2287-3775(Online)한국음향학회

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