Patch near-field acoustical holography study based on measurement of vector hydrophone array

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (8) : 225-229.

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Patch near-field acoustical holography study based on measurement of vector hydrophone array

HU Bo; YANG De-Sen

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Abstract

In statistically optimized near-field acoustical holography (SONAH), the reconstructed acoustical field is obtained by a linear combination of the measured sound pressure data on the holographic surface, so it could overcome the limitation of FFT-based NAH. Appling this method to identify the noise source in underwater cylindrical sources, the principle of the statistically optimized cylindrical near-field acoustical holography based on measurement of pressure and particle velocity was presented. The numerical simulations have been conducted. At last, the validity and correctness of vector hydrophone array is assessed by underwater near-field acoustic holography experiments. The results of experiment using vector hydrophone array show the merits of the underwater NAH in the reconstruction of sound field, identification and localization of the noise sources.

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near-field acoustical holography / acoustic pressure / particle velocity / statistically optimized / vector hydrophone array

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HU Bo;YANG De-Sen. Patch near-field acoustical holography study based on measurement of vector hydrophone array[J]. Journal of Vibration and Shock, 2011, 30(8): 225-229