Acoustic wave measurements of the properties of porous materials filled with air and granules

1994 ◽  
Vol 95 (6) ◽  
pp. 3682-3682
Author(s):  
Richard G. Stearns
Keyword(s):  
Acoustic Wave ◽  
Porous Materials ◽  
Wave Measurements

Cased borehole acoustic-wave propagation with varying bonding conditions: Theoretical and experimental modeling

Geophysics ◽  
2019 ◽  
Vol 84 (4) ◽  
pp. D161-D169
Author(s):  
Can Jiang ◽  
Xue-Lian Chen ◽  
Yuan-Da Su ◽  
Xiao-Ming Tang
Keyword(s):  
Acoustic Wave ◽  
Wave Theory ◽  
Acoustic Measurements ◽  
Acoustic Wave Propagation ◽  
Velocity Change ◽  
Slip Boundary ◽  
Wave Measurements ◽  
Bonding Condition ◽  
Bond Evaluation ◽  
Cased Borehole

Acoustic measurements in cased boreholes are important for cement-bond evaluation behind the casing. In conjunction with a recently developed acoustic-wave theory using slip-boundary modeling, we carried out an experimental study for different cement-bond conditions. Four different cased-hole models were constructed, where the interface between the casing and the cement, and that between the cement and the formation, are decoupled or partially bonded to simulate the different cement bond conditions. An acoustic system is placed in the borehole to measure extensional casing waves along the borehole. By extracting the attenuation and velocity of casing waves from the experimental data, the bonding conditions were analyzed and compared with the theoretical modeling. The results indicate that, compared with the free-pipe situation, the casing waves are attenuated when there is some degree of bonding (good or poor) between the casing and the formation. However, when the poor bonding occurs at the cement-formation interface, the casing wave indicates significant velocity reduction and dispersion, the degree of the velocity change varying with the bonding condition. This wave phenomenon is predicted by the slip-boundary modeling. By adjusting the slip-boundary parameters in the modeling, the experimental results can be quantitatively modeled. These results are also confirmed by cased-hole acoustic logging data examples. The theoretical model can therefore be used to interpret cased-borehole acoustic-wave measurements.

Surface acoustic wave measurements of YBa2Cu3O7−δ thin films and single crystals

1997 ◽  
Vol 70 (11) ◽  
pp. 1468-1470 ◽  
Author(s):  
R. Gaffney ◽  
C. Hucho ◽  
J. R. Feller ◽  
M. J. McKenna ◽  
B. K. Sarma ◽  
...  
Keyword(s):  
Thin Films ◽  
Acoustic Wave ◽  
Single Crystals ◽  
Surface Acoustic Wave ◽  
Wave Measurements

scholarly journals Hybrid Sensor Device for Simultaneous Surface Plasmon Resonance and Surface Acoustic Wave Measurements

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6177
Author(s):  
Anastasios G. Samarentsis ◽  
Alexandros K. Pantazis ◽  
Achilleas Tsortos ◽  
Jean-Michel Friedt ◽  
Electra Gizeli
Keyword(s):  
Surface Plasmon Resonance ◽  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Love Wave ◽  
Future Application ◽  
Label Free ◽  
Combined System ◽  
Wave Measurements

Surface plasmon resonance (SPR) and Love wave (LW) surface acoustic wave (SAW) sensors have been established as reliable biosensing technologies for label-free, real-time monitoring of biomolecular interactions. This work reports the development of a combined SPR/LW-SAW platform to facilitate simultaneous optical and acoustic measurements for the investigation of biomolecules binding on a single surface. The system’s output provides recordings of two acoustic parameters, phase and amplitude of a Love wave, synchronized with SPR readings. We present the design and manufacturing of a novel experimental set-up employing, in addition to the SPR/LW-SAW device, a 3D-printed plastic holder combined with a PDMS microfluidic cell so that the platform can be used in a flow-through mode. The system was evaluated in a systematic study of the optical and acoustic responses for different surface perturbations, i.e., rigid mass loading (Au deposition), pure viscous loading (glycerol and sucrose solutions) and protein adsorption (BSA). Our results provide the theoretical and experimental basis for future application of the combined system to other biochemical and biophysical studies.

Nondestructive evaluation of veneer quality using acoustic wave measurements

2001 ◽  
Vol 34 (6) ◽  
pp. 505-516 ◽  
Author(s):  
J. Wang ◽  
J. M. Biernacki ◽  
F. Lam
Keyword(s):  
Acoustic Wave ◽  
Nondestructive Evaluation ◽  
Wave Measurements
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