TY - JOUR
T1 - The propagation and attenuation of medium-frequency ultrasonic waves in concrete
T2 - A signal analytical approach
AU - Gaydecki, P. A.
AU - Burdekin, F. M.
AU - Damaj, W.
AU - John, D. G.
PY - 1992
Y1 - 1992
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0026626726&partnerID=8YFLogxK
U2 - 10.1088/0957-0233/3/1/018
DO - 10.1088/0957-0233/3/1/018
M3 - Article
AN - SCOPUS:0026626726
SN - 0957-0233
VL - 3
SP - 126
EP - 134
JO - Measurement Science and Technology
JF - Measurement Science and Technology
IS - 1
M1 - 018
ER -