Experimental Investigation of Underwater Noise Produced by Ships by Means of Sound Intensity Method

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

Abstracts

EN

Ship noise is a one of most important part of the field of the acoustic environment. Its reduction and monitoring is a very important aspect in the performance of underwater acoustic systems and in the habitability of the vessel for the crew and passengers. In naval operations the noise radiated by a ship is also dominant source of information for underwater sonar weapons systems. Sound intensity is the vector quantity which informs us about the sound power flux, the direction of the sound source. The probe tracks the position of source and at the same time, measures the component of sound-intensity vector. Generally only one component of vector sound intensity was measured, perpendicular to a given measurement surface. The sound intensity of a moving source includes effects such as flow noise that are not present when the source is stationary. The accuracy of measuring acoustic intensity using two closely spaced hydrophones by correcting the phase mismatch error by measuring the transfer function between the two detector systems at the same time was examined. The two measuring hydrophone instrumentation systems were earlier carefully calibrated. Our results have been obtained using digital methods, where was used PULSE B&K measuring system.

Keywords

EN

43.30.Nb

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 1
• Pages: 58-61

Dates

published

2010-07

Contributors

author

I. Gloza

• Polish Naval Academy in Gdynia, Śmidowicza 69, 81-103 Gdynia, Poland

References

• 1. I. Gloza, Acta Acoustica United with Acustica, 88, 670 (2002)
• 2. E. Kozaczka, L Milanowski, in: Proceeding of the Xth Symposium on Hydroacoustics, Gdynia-Jurata 1993, p. 133
• 3. R. Hickling, W. Wei, R. Raspet, J. Acoust. Soc. Am. 94, 2408 (1993)
• 4. R. Hickling, W. Wei, J. Acoust. Soc. Am. 97, 856 (1995)
• 5. W. Wei, R. Hickling, J. Acoust. Soc. Am. 97, 116 (1995)
• 6. F.J. Fahy, Sound Intensity (2nd ed.), E&FN Spon, London 1995

Identifiers

DOI

10.12693/APhysPolA.118.58