Browse > Article
http://dx.doi.org/10.5050/KSNVE.2015.25.6.440

A Study on the Acoustic Baffle to Reduce Ghost Target According to Structure behind Cylindrical Array Sensor  

Seo, Young Soo (Agency for Defense Development)
Kim, Dong Hyun (LIG Nex1)
Kim, Jin Tae (HwaSeung Material)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.25, no.6, 2015 , pp. 440-446 More about this Journal
Abstract
Acoustic signal is emitted from a vessel and received by a cylindrical array sensor at some distance from the vessel. Acoustic signal is the source for a cylindrical array sensor which is designed to detect the acoustic signal. Cylindrical array sensors seldom have an ideal hydrodynamic shape and are not sufficiently robust to survive without some protection and they are normally housed in a sonar dome. Reflected signals by some structure inside a sonar dome make unwanted signals. Therefore, an acoustic baffle is used to minimize unwanted signals. The performance of the acoustic baffles can be determined from the acoustic numerical analysis at the design stage. In this study, finite element method was used to analyze the acoustic field around the cylindrical array sensor and baffle effects. The baffle performance can be defined the echo reduction. To show the baffle performance, the specimens were made for pulse tube test and echo reductions were measured during the test. In this paper, the effect of echo reduction of the acoustic baffle was discussed.
Keywords
Cylindrical Array Sensor; Ghost Target; Acoustic Baffle; FEM; Echo Reduction;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 COMSOL 4.3 User’s Guide.
2 Seo, Y. S., Ham, I. B. and Jeon, J. J., 2013, A Study on the Acoustic Performance Design Technique of Underwater Acoustic Material, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 23, No. 10, pp. 920-927.   DOI   ScienceOn
3 Seo, Y. S., Ham, I. B. and Jeong, W. J., 2014, A Study on the Echo Reduction Performance of Underwater Acoustic Material, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 24, No. 11, pp. 868-875.   DOI
4 Kown, H. W., Hong, S. Y., Song, J. H., Jeon J. J. and Seo, Y. S., 2013, Development of Reveived Acoustic Pressure Analysis Program of CHA Using Beam Tracing Method, Journal of the Society of Naval Architects of Korea, Vol. 50, No. 3, pp. 190-198.   DOI
5 Kinsler, L. E., Frey, A. R., Coppens, A. B. and Sander, J. V., 2000, Fundamentals of Acoustics, John Wiley & Sons, Inc.