The propagation and attenuation of medium-frequency ultrasonic waves in concrete: A signal analytical approach

P. A. Gaydecki, F. M. Burdekin, W. Damaj, D. G. John

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The manner in which medium-frequency ultrasonic pulses travelling through concrete are generated, received, digitized and analysed is described. Due to the highly attenuating nature of this medium and its differential effects on the frequency composition of broad-band signals, signal analysis was performed by partitioning the signal into discrete windows in the time domain, corresponding to the emergence of individual wave phenomena within the medium. These windows were then transformed to the frequency domain for subsequent filtering and interpretation. Experimentation combined with theoretical modelling has shown that the appearance and decay of discrete frequency bands depends on both the composition of the concrete, termed the resonance phase, and its external importance with respect to the ultrasonic inspection of concrete and other such inhomogeneous materials.

    Original languageEnglish
    Article number018
    Pages (from-to)126-134
    Number of pages9
    JournalMeasurement Science and Technology
    Volume3
    Issue number1
    DOIs
    Publication statusPublished - 1992

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