잔향 수조에서의 시간 이력 수음 신호 간 교차상관을 이용한 수중 음속 계측 방법에 관한 실험적 검증
Experimental Validation on Underwater Sound Speed Measurement Method Using Cross-Correlation of Time-Domain Acoustic Signals in a Reverberant Water Tank
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초록
Underwater sound speed is an important analysis parameter on an estimation of the underwater radiated noise (URN) emitted from vessels. This paper aims to present an underwater sound speed measurement procedure using a cross-correlation of time-domain acoustic signals and validate the procedure through an experiment in a reverberant water tank. For the purpose, time-domain acoustic signals transmitted by a Gaussian pulse excitation from an acoustic projector have been measured at 20 hydrophone positions in the reverberant water tank. Then, the sound speed in water has been calculated by a linear regression using 190 cross-correlation cases of distances and time lags between the received signals and the result has been compared with those estimated by the existing empirical formulae. From the result, it is regarded that the presented experimental procedure to measure an underwater sound speed is reliably applicable if the time resolution is sufficiently high in the measurement.
Abstract
Underwater sound speed is an important analysis parameter on an estimation of the underwater radiated noise (URN) emitted from vessels. This paper aims to present an underwater sound speed measurement procedure using a cross-correlation of time-domain acoustic signals and validate the procedure through an experiment in a reverberant water tank. For the purpose, time-domain acoustic signals transmitted by a Gaussian pulse excitation from an acoustic projector have been measured at 20 hydrophone positions in the reverberant water tank. Then, the sound speed in water has been calculated by a linear regression using 190 cross-correlation cases of distances and time lags between the received signals and the result has been compared with those estimated by the existing empirical formulae. From the result, it is regarded that the presented experimental procedure to measure an underwater sound speed is reliably applicable if the time resolution is sufficiently high in the measurement.
참고문헌 (19)
- Bae, S. R., "Waterborne noise prediction of the reinforced cylindrical shell using the SEA technique", Transactions of the Korean Society for Noise and Vibration Engineering, 3(2), pp.155~161 (1993)
- Chen, C. T., "Speed of sound in seawater at high pressures", The Journal of the Acoustical Society of America, 62(5), pp.1129~1135 (1977)
- Coppens, A. B., "Simple equations for the speed of sound in Neptunian waters", The Journal of the Acoustical Society of America, 69(3), pp.862~863 (1981)
- Del Grosso, V. A., "New equation for the speed of sound in natural waters (with comparisons to other equations)", The Journal of the Acoustical Society of America, 56(4), pp.1084~1091 (1974)
- Duan, J., "A hybrid algorithm of underwater structure vibration and acoustic radiation-propagation in ocean acoustic channel", International Journal of Naval Architecture and Ocean Engineering, 12, pp.680~690 (2020)
- Algorithms for the computation of fundamental properties of seawater, "Fofonoff, N. P.", UNESCO, ~, pp.UNESCO Technical Papers in Marine Sciences No.44 (1983)
- Ingle, V. K., "Digital Signal Processing Using MATLAB" (2012), Cengage Learning
- International Maritime Organization(IMO), "Guidelines for the reduction of underwater noise from commercial shipping to address adverse impacts on marine life, IMO MEPC.1", Circ.833, 2014
- "Addressing underwater noise from ships-draft revised guidelines agreed" (2023)[URL]
- "Marine Environment Protection Committee (MEPC 80), 3-7 July 2023:6. Addressing underwater noise-revised guidelines adopted" (2023)[URL]
- Kil, B. J., "A result of prolonged monitoring underwater sound speed in the center of the Yellow Sea", The Journal of the Acoustical Society of Korea, 40(3), pp.183~191 (2021)
- Kinsler, L. E., "Fundamentals of Acoustics" (2000), John Wiley and Sons, Inc
- Lee, J. Y., "Applicability and reliability of an experimental method measuring underwater acoustic radiation efficiency of floating box-type plate structures in a reverberant water tank", International Journal of Naval Architecture and Ocean Engineering, 15, pp.100553~ (2023)
- Leroy, C. C., "A new equation for the accurate calculation of sound speed in all oceans", The Journal of the Acoustical Society of America, 124(5), pp.2774~2782 (2008)
- Leroy, C. C., "Erratum: A new equation for the accurate calculation of sound speed in all oceans", The Journal of the Acoustical Society of America, 126(4), pp.2117~ (2009)
- Mackenzie, K. V., "Nine-term equation for sound speed in the oceans", The Journal of the Acoustical Society of America, 70(3), pp.807~812 (1981)
- Medwin, H., "Speed of sound in water: A simple equation for realistic parameters", The Journal of the Acoustical Society of America, 58(6), pp.1318~1319 (1975)
- Wong, G. S. K., "Speed of sound in seawater as a function of salinity, temperature, and pressure", The Journal of the Acoustical Society of America, 97(3), pp.1732~1736 (1995)
- Wu, H., "Application of coupled FEM", BEM on the analysis of underwater radiated noise of a surface ship induced by hull vibrations, 2017, pp.25(2), 196~204