Processing of ultrasonic grain noise signals for the estimation of depth- and frequency-dependent attenuation

We consider in this paper the general problem of ultrasonic characterization of materials by means of analysing the dependence of attenuation on the frequency and depth of the backscattering noise. Some theoretical analysis is included to define the procedure and to gain insights into the suitabilit...

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Bibliographic Details
Published in:Measurement science & technology 2003-07, Vol.14 (7), p.1018-1024
Main Authors: Vergara, L, Fuente, J V, Gosálbez, J, Miralles, R, Bosch, I
Format: Article
Language:English
Subjects:
Acoustic instruments, equipment, and techniques
Acoustical measurements and instrumentation
Acoustics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Physics
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Summary:We consider in this paper the general problem of ultrasonic characterization of materials by means of analysing the dependence of attenuation on the frequency and depth of the backscattering noise. Some theoretical analysis is included to define the procedure and to gain insights into the suitability of the approach. From the depth- and frequency-dependent attenuation diagrams we may derive material signatures to be used for classification-oriented problems or derive parameters to be correlated with material properties. A particular case is considered: the characterization of cement pastes. For this case we propose the use of attenuation profiles as material signatures, and we show that the area of the profile exhibits good correlation with the porosity measured by destructive methods.
ISSN:0957-0233
1361-6501
DOI:10.1088/0957-0233/14/7/316