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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1109/TUFFC.2020.3007808
|2 doi
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|a pubmed24n1044.xml
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|e rakwb
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|a eng
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|a Wear, Keith A
|e verfasserin
|4 aut
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|a Correction for Hydrophone Spatial Averaging Artifacts for Circular Sources
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|c 2020
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|a Text
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|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 19.07.2021
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|a Date Revised 03.08.2021
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a This article reports an investigation of an inverse-filter method to correct for experimental underestimation of pressure due to spatial averaging across a hydrophone sensitive element. The spatial averaging filter (SAF) depends on hydrophone type (membrane, needle, or fiber-optic), hydrophone geometrical sensitive element diameter, transducer driving frequency, and transducer F number (ratio of focal length to diameter). The absolute difference between theoretical and experimental SAFs for 25 transducer/hydrophone pairs was 7% ± 3% (mean ± standard deviation). Empirical formulas based on SAFs are provided to enable researchers to easily correct for hydrophone spatial averaging errors in peak compressional pressure ( pc ), peak rarefactional pressure ( pr ), and pulse intensity integral. The empirical formulas 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- [Formula: see text] membrane hydrophone, then spatial averaging errors are approximately 16% ( pc ), 12% ( pr ), and 24% (pulse intensity integral). The formulas are based on circular transducers but also provide plausible upper bounds for spatial averaging errors for transducers with rectangular-transmit apertures, such as linear and phased arrays
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Research Support, U.S. Gov't, P.H.S.
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|a Shah, Anant
|e verfasserin
|4 aut
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|a Baker, Christian
|e verfasserin
|4 aut
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|i Enthalten in
|t IEEE transactions on ultrasonics, ferroelectrics, and frequency control
|d 1986
|g 67(2020), 12 vom: 21. Dez., Seite 2674-2691
|w (DE-627)NLM098181017
|x 1525-8955
|7 nnns
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|g volume:67
|g year:2020
|g number:12
|g day:21
|g month:12
|g pages:2674-2691
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|u http://dx.doi.org/10.1109/TUFFC.2020.3007808
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