An experimental analysis of vibration-induced noise isolation characteristics of a sonar acoustic sensor

Kyungseop Kim; Yub Je; Ho-Jun Kim; Yo-Han Cho; Jeong-Min Lee; Donghyeon Kim; Woosuk Chang

doi:10.7776/ASK.2019.38.2.193

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2019 Vol.38, Issue 2 Preview Page Next Page

Research Article

An experimental analysis of vibration-induced noise isolation characteristics of a sonar acoustic sensor 소나 음향센서의 진동유기 소음 차단 특성에 대한 실험적 연구

31 March 2019. pp. 193-199

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Abstract

In this paper, the results of underwater vibration experiment are analyzed to verify platform vibration-induced noise isolation characteristics of a hull-mounted acoustic sensor. The experimental condition causing platform vibration-induced noise is generated using the mock-up hull, where the acoustic sensor is installed, with shaker in an acoustic water tank. The performance indices of ATF (Acceleration Transfer Function), AVS (Acceleration Voltage Sensitivity), and IL (Insertion Loss) for the acoustic sensor are calculated from the output of the standard accelerometers, which are installed on the mock-up hull and the acoustic sensor, and the output signal of the acoustic sensor. The frequency-dependent noise isolation characteristics of the acoustic sensor are analyzed based on the calculated performance indices and an effectiveness of the experiment is examined.

Keywords

Hull-mounted acoustic sensor

Mock-up hull

Vibration-induced noise

Underwater vibration test

본 논문에서는 선체부착형 음향센서의 플랫폼 진동유기 소음 차단 특성을 확인하기 위한 수중 진동 실험을 수행하고 결과를 분석하였다. 음향수조 환경에서 음향센서가 설치된 선체모사구조물과 가진기를 이용하여 플랫폼 진동유기 소음 조건을 구현하였고, 선체모사구조물 및 음향센서에 설치된 표준 가속도계와 음향센서의 출력신호 측정을 통해 음향센서의 진동차단율, 삽입손실 및 진동민감도와 같은 성능지수를 산출하였다. 산출된 성능지수 결과를 토대로 음향센서의 주파수별 소음 차단 특성을 분석하고 실험 기법의 유효성을 검토하였다.

키워드

선체부착형 음향센서

선체모사구조물

진동유기 소음

수중 진동 실험

References

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C. H. Sherman and J. L. Butler, Transducer and Arrays for Underwater Sound (Springer, Switzerland, 2016), pp. 279-300.

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J. Leader, J. Pan, P. Dylejko, and D. Matthews, "Experimental investigation into sound and vibration of a torpedo-shaped structure under axial force excitation," Proc. Meetings on Acoustics 19, 065059 (2013).

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J. W. Sohn, O. C. Kwon, and S. B. Choi, "Modal characteristics and vibration control of cylindrical shell structure: experimental results comparison in the air and water" (in Korean), Proc. Korean Soc. Noise Vib. Eng. Annual Spring Conference, 384-389 (2009).

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 : 38
No :2
Pages :193-199
Received Date : 2018-11-08
Revised Date : 2019-01-31
Accepted Date : 2019-03-27
DOI :https://doi.org/10.7776/ASK.2019.38.2.193

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

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