Ship's underwater noise measurements using sound intensity method

• Autorzy: Gloza I.
• Języki publikacji: EN

Abstrakty

EN

Ship noise is a most important part of the field of underwater acoustics. Its reduction and monitoring is an 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 systems. Sound intensity is the vector quantity which informs us about the sound power flux, the position and 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 was examined. The two measuring hydrophone instrumentation systems were earlier calibrated. Our results have been obtained using digital methods, where was used PULSE measuring system.

Słowa kluczowe

EN

underwater noise; ships; sound intensity method

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2009
• Tom: Vol. 12
• Strony: 53--60
• Opis fizyczny: Bibliogr. 6 poz., wykr.

Twórcy

autor

Gloza I.

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

Bibliografia

• [1] Gloza I: Tracking the Underwater Noise Source Using a Vector Sound-Intensity Probe. Acta Acoustica United with Acustica, vol.88 (2002) 670-673.
• [2] E. Kozaczka, L Milanowski: Sound Intensity Measurement in Water. Proceeding of the Xth Symposium on Hydroacoustics, Gdynia-Jurata, 1993, 133-138.
• [3] R. Hickling, W. Wei, R. Raspet, Finding the Direction of a Sound Source Using a Vector Sound-Intensity Probe. J. Acoust. Soc. Am. 94, ( 1993) 2408-2412.
• [4] R. Hickling, W. Wei:Use of pith-azimuth Plots in Determining the Direction of a Sound Source in Water with a Vector Sound- Intensity Probe.
• [5] W. Wei, R. Hickling: Measuring the Sound Power of a Moving Source. J.Acoust. Soc. Am. 97 (1995) 116-120.
• [6] F.J. Fahy: Sound Intensity (2nd ed.). E&FN Spon, London 1995.