用膜式水听器测量圆对称压力波束时空间平均伪像的校正
Correction for Spatial Averaging Artifacts for Circularly-Symmetric Pressure Beams Measured with Membrane Hydrophones.
作者信息
Wear Keith, Shah Anant, Baker Christian
机构信息
US Food and Drug Administration, Silver Spring, MD, USA.
National Physical Laboratory, Teddington, U.K.
出版信息
IEEE Int Ultrason Symp. 2020;NA:1-4. doi: 10.1109/ius46767.2020.9251662.
Abstract
This paper investigates experimental underestimation of pressure measurements due to spatial averaging across a hydrophone sensitive element. Empirical relationships are measured to enable correction for hydrophone spatial averaging errors in peak compressional pressure ( ), peak rarefactional pressure ( ), and pulse intensity integral (). The empirical relationships show, for example, that if a 3-MHz, F/2 transducer is driven to moderate nonlinear distortion and measured at the focal point with a 500-μm membrane hydrophone, then spatial averaging errors are approximately 16% ( ), 12% ( ), and 24% ().
摘要
本文研究了由于水听器敏感元件上的空间平均导致的压力测量实验低估问题。测量了经验关系，以便对峰值压缩压力（ ）、峰值稀疏压力（ ）和脉冲强度积分（）中的水听器空间平均误差进行校正。例如，经验关系表明，如果一个3兆赫、F/2的换能器被驱动到中等非线性失真，并使用500微米膜片水听器在焦点处进行测量，那么空间平均误差大约为16%（ ）、12%（ ）和24%（）。
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