Identification Methods of Underwater Noise Sources Generated by Small Ships

• Authors: I. Gloza
• Languages of publication: EN

Abstracts

EN

In this work we were interested in the use for the localization of the ship noise sources in the water environment. Particular interest was dedicated to identifying of narrow band contribution to the total spectra of the ship hydroacoustic noise. The analyses were performed in time and frequency domain. The diesel engine, the electric motor and the propeller have notably been studied and the different frequencies connected to these devices have been listed. Extensive measurements were made of the underwater radiated noise of K1 and K2, small vessels powered by an electric and diesel engines. The discrete Fourier transform and the short time Fourier transform and sound intensity method were used for a precise analysis. The coherence function was also performed to associate each component of underwater noise with the vibrating part of the engine, which generates it. The measurement results obtained here have been later analyzed and a criticism of each method has been done, focusing on its advantages in the field of the identification of the noise sources.

Keywords

EN

43.30.Nb

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2011
• Volume: 119
• Issue: 6A
• Pages: 961-965

Dates

published

2011-06

Contributors

author

I. Gloza

• Polish Naval Academy, Śmidowicza 69, 81-919 Gdynia, Poland

References

• 1. R.J. Urick, Principles of Underwater Sound, McGraw-Hill, New York 1975
• 2. D. Ross, Mechanics of Underwater Noise, Pergamon, New York 1976
• 3. Royal Norwegian Navy, Brüel & Kjær application notes
• 4. S.J. Malinowski, I. Gloza, Acta Acoustica united with Acoustica 88, 718 (2002)
• 5. M. Crocker, F. Jacobsen, in: Crocker, M. Encyclopaedia of Acoustics, Vol. 4, Ed. M.J. Crocker, John Wiley, New York 1997, p. 1855
• 6. I. Gloza, Acta Phys. Pol. A 118, 58 (2010)

Identifiers

DOI

10.12693/APhysPolA.119.961