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Underwater patch near-field acoustical holography based on particle velocity and vector hydrophone array

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Abstract

One-step patch near-field acoustical holography (PNAH) is a powerful tool for identifying noise sources from the partially known sound pressure field. The acoustical property to be reconstructed on the surface of interest is related to the partially measured pressure on the hologram surface in terms of sampling and bandlimiting matrices, which cost more in computation. A one-step procedure based on measuring of the normal component of the particle velocity is described, including the mathematical formulation. The numerical simulation shows that one-step PNAH based on particle velocity can obtain more accurately reconstructed results and it is also less sensitive to noise than the method based on pressure. These findings are confirmed by an underwater near-field acoustical holography experiment conducted with a vector hydrophone array. The experimental results have illustrated the high performance of one-step PNAH based on particle velocity in the reconstruction of sound field and the advantages of a vector hydrophone array in an underwater near-field measurement.

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Authors and Affiliations

  1. Science and Technology on Underwater Acoustic Laboratory, Harbin Engineering University, Harbin, 150001, China

    Bo Hu, DeSen Yang, SiChun Li, Yu Sun, ShiQi Mo & ShengGuo Shi

Authors
  1. Bo Hu
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  2. DeSen Yang
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  3. SiChun Li
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  4. Yu Sun
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  5. ShiQi Mo
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  6. ShengGuo Shi
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Correspondence to Bo Hu.

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Hu, B., Yang, D., Li, S. et al. Underwater patch near-field acoustical holography based on particle velocity and vector hydrophone array. Sci. China Phys. Mech. Astron. 55, 2010–2017 (2012). https://doi.org/10.1007/s11433-012-4905-4

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  • DOI: https://doi.org/10.1007/s11433-012-4905-4

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