@article{Egerton:2017:10.1121/1.4976689,
author = {Egerton, JS and Lowe, MJS and Huthwaite, P and Halai, HV},
doi = {10.1121/1.4976689},
journal = {JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA},
pages = {1535--1545},
title = {Ultrasonic attenuation and phase velocity of high-density polyethylene pipe material},
url = {http://dx.doi.org/10.1121/1.4976689},
volume = {141},
year = {2017}
}

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TY  - JOUR
AB  - Knowledge of acoustic properties is crucial for ultrasonic or sonic imaging and signal detection in nondestructive evaluation (NDE), medical imaging, and seismology. Accurately and reliably obtaining these is particularly challenging for the NDE of high-density polyethylene (HDPE), such as is used in many water or gas pipes, because the properties vary greatly with frequency, temperature, direction and spatial location. Therefore the work reported here was undertaken in order to establish a basis for such a multiparameter description. The approach is general but the study specifically addresses HDPE and includes measured data values. Applicable to any such multiparameter acoustic properties dataset is a devised regression method that uses a neural network algorithm. This algorithm includes constraints to respect the Kramers-Kronig causality relationship between speed and attenuation of waves in a viscoelastic medium. These constrained acoustic properties are fully described in a multidimensional parameter space to vary with frequency, depth, temperature, and direction. The resulting uncertainties in acoustic properties dependence on the above variables are better than 4% and 2%, respectively, for attenuation and phase velocity and therefore can prevent major defect imaging errors.
AU  - Egerton,JS
AU  - Lowe,MJS
AU  - Huthwaite,P
AU  - Halai,HV
DO  - 10.1121/1.4976689
EP  - 1545
PY  - 2017///
SN  - 0001-4966
SP  - 1535
TI  - Ultrasonic attenuation and phase velocity of high-density polyethylene pipe material
T2  - JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
UR  - http://dx.doi.org/10.1121/1.4976689
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000398962500039&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/45868
VL  - 141
ER  - 

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