Skin-fold thicknesses in human are affected by individual and regional differences in compressibility that vary with age, gender and recent weight loss.
However, time or space differences between local regions of interest under different compression ratios change with differences in compressibility of the insonified tissue.
The echoes of the transmitted pulses are caused by differences in the mass density and compressibility of the medium that is explored by the ultrasound transducer.
The differences in compressibility for the intact formation are likely due to sample disturbance and the differences in strain level imposed by the field and laboratory methods.
Since no particle crushing was found in any of the conducted triaxial compression tests, we expect that this difference in compressibility resulted from the larger volumetric fraction of the sand particles near the specimen's sides.
The comparative approach of this work can practically eliminate pressure and deviatoric stress as variables and is particularly suitable for detection of subtle difference in compressibility measurements.
This comparative approach would eliminate systematic errors arising from instrument response and pressure/deviatoric-stress determination and thus allows detection of small difference in compressibility measurements [25, 26].
Due to the difference in compressibility of the firm and compliant springboards, we hypothesised that the force application time required to jump from the compliant springboard would be greater than from the firm springboard.
Due to differences in acoustic impedance and compressibility between the microbubbles and surrounding media, ultrasound contrast agents act as nonlinear scatters.
The difference in density and compressibility of E. coli and PBMCs could result in the different acoustic contrast factors and eventually affect the acoustic radiation forces acting on the cells.
