Low-Frequency Active Echo Reduction Using a Tile Projector

Jae-Wan Lee; Sangbeom Woo; Hada Jang; Keunsang Lee; Wan-Gu Kim; Hwi-Suk Kang; Won-Suk Ohm; Youngcheol Park; Suk Wang Yoon; Youngsoo Seo

doi:10.7776/ASK.2014.33.6.366

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2014 Vol.33, Issue 6 Preview Page Next Page

Low-Frequency Active Echo Reduction Using a Tile Projector 타일형 프로젝터를 이용한 저주파 능동 반향음 감소 기법

30 November 2014. pp. 366-374

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Abstract

With the advent of submarine detection technology using low-frequency active sonar there is a call for a new submarine stealth device that can replace the existing passive anechoic tiles. Proposed in this study is a low-frequency echo reduction technique based on active impedance matching, which employs a tile projector designed to cover a wide area such as the surface of a ship. To judge the feasibility of the active impedance matching technique finite-element simulations of low-frequency echo reduction are performed. Based on the analysis, a tile projector is designed, fabricated, and tested in an acoustic tank for its low-frequency echo reduction performance.

Keywords

Low-frequency

Echo reduction

Tile projector

Active impedance matching

저주파 능동 소나를 이용한 잠수함 탐지 기술이 개발됨에 따라, 기존의 수동 무반향 타일을 대치할 새로운 잠수함 스텔스 기술이 요구되는 추세이다. 본 연구에서는 선체 표면과 같은 대면적에 적용 가능한 타일형 프로젝터를 이용하여 능동 임피던스 정합을 구현함으로써 저주파 반향음 감소를 도모하는 기법을 제안한다. 먼저 능동 임피던스 정합 기법의 기술적 타당성을 확인하기 위하여 유한요소 모델을 이용한 저주파 반향음 감소 시뮬레이션을 수행하였다. 이를 바탕으로 타일형 프로젝터를 설계 및 제작하여 음향수조에서 저주파 반향음 감소 실험을 수행하였다.

키워드

저주파

반향음 감소

타일형 프로젝터

능동 임피던스 정합

References

1.T. R. Howarth, V. K. Varadan, X. Q. Bao, and V. V. Varadan, “Piezocomposite coating for active underwater sound reduction,” J. Acoust. Soc. Am. 91, 823-831 (1992).

2.L. D. Lafleur, F. D. Shields, and J. E. Hendrix, “Acoustically active surfaces using piezorubber,” J. Acoust. Soc. Am. 90, 1230-1237 (1991).

3.W. Chang, D. Kwon, J. Park, and B. Jeon, “An active underwater acoustic reflection control system,” Multisensor Fusion and Integration for Intelligent Systems, 2008. MFI 2008. IEEE International Conference on, 583-587 (2008).

4.W. S. Chang and D. R. Gweon, “Study on sound reflection control using an active sound absorber” (in Korea), J. Acoust. Soc. Kr. 28, 806-814 (2009.)

5.M. B. Braga, B. Honein, P. E. Barbone, and G. Herrmann, “Suppression of sound reflected from a piezoelectric plate,” J. Intell. Mater. Syst. Struct. 3, 209-223 (1992).

6.C. L. Scandrett, Y. S. Shin, K. C. Hung, M. S. Khan, and C. C. Lilian, “Cancellation techniques in underwater scattering of acoustic signals,” J. Sound Vib. 272, 513-537 (2004).

7.F. D. Shields, Piezoelectric Panel Speaker, US005196755, (1993).

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 : 33
No :6
Pages :366-374
Received Date : 2014-09-30
Accepted Date : 2014-10-23
DOI :https://doi.org/10.7776/ASK.2014.33.6.366

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

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