| On the measurement of frequency-dependent ultrasonic attenuation in strongly heterogeneous materials. | |
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MedLine Citation:
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PMID: 20537363 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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This paper deals with the measurement of frequency-dependent ultrasonic attenuation in strongly heterogeneous materials, such as cementitious materials. To improve the measurement of this parameter on this kind of materials, a linear swept-frequency signal is used to drive an emitter transducer to conduct a through-transmission inspection in immersion. To filter out undesirable frequency content, time-frequency filtering and detection process are performed. The use of this method has been compared with two excitation techniques, the broadband and the narrowband pulses. The results obtained using the swept-frequency excitation together with the time-frequency filtering, allows the determination of the attenuation curves with high accuracy over a wide frequency range without the need for complicated equipment, and improves the effective bandwidth by using a unique pair of transducers. |
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Authors:
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M Molero; I Segura; S Aparicio; M G Hernández; M A G Izquierdo |
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Publication Detail:
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Type: Journal Article Date: 2010-05-10 |
Journal Detail:
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Title: Ultrasonics Volume: 50 ISSN: 1874-9968 ISO Abbreviation: Ultrasonics Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-07-29 Completed Date: 2010-09-14 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0050452 Medline TA: Ultrasonics Country: Netherlands |
Other Details:
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Languages: eng Pagination: 824-8 Citation Subset: - |
Copyright Information:
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Copyright (c) 2010 Elsevier B.V. All rights reserved. |
Affiliation:
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CAEND--Consejo Superior de Investigaciones Cientificas/Polytechnic University of Madrid, Arganda del Rey, Madrid, Spain. molero@caend.upm-csic.es |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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