Effect on Measurement of the Radiated Acoustic Field of Underwater Structure Based on NAH with Swinging Measuring Surface

Lin Na Zhou; Shao Chun Ding; Ruo Yu Zhang; Jing Jun Lou; Shi Jian Zhu

doi:10.4028/www.scientific.net/AMM.197.778

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 197Effect on Measurement of the Radiated Acoustic...

Effect on Measurement of the Radiated Acoustic Field of Underwater Structure Based on NAH with Swinging Measuring Surface

Abstract:

This paper analyzes the effects of the swinging NAH(Near field Acoustical Holography) measuring array on measurement of the sound power level of underwater structure. We use the method of sound intensity integral, the method of mean square sound pressure and the method of NAH reversal pressure to calculate the sound power level under certain collection of frequency with measuring surface in different states. We also analyze the relative error of results acquired by those methods, which can help validating the reliability and the error estimate of the results calculated with NAH.

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Periodical:

Applied Mechanics and Materials (Volume 197)

Pages:

778-781

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.197.778

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Online since:

September 2012

Authors:

Lin Na Zhou, Shao Chun Ding, Ruo Yu Zhang, Jing Jun Lou, Shi Jian Zhu

Keywords:

NAH, Radiated Acoustic Field, Sound Power Level, Underwater Structure

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