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全息量水器的研制推广应用一种新型计量仪器—明渠
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作者 卞玉山 张培斌 《治淮》 2002年第5期24-25,共2页
关键词 明渠 全息量水器 结构组成
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Underwater patch near-field acoustical holography based on particle velocity and vector hydrophone array
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作者 HU Bo YANG DeSen +3 位作者 LI SiChun SUN Yu MO ShiQi SHI ShengGuo 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2012年第11期2010-2017,共8页
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 intere... 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. 展开更多
关键词 near-field acoustical holography PATCH particle velocity vector hydrophone array
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