Domenico gives a valuable set of data on acoustic velocities in a sand pack and a glass bead pack with various brine saturations and various pressures. There are, however, two difficulties with the extensive discussion of the data in terms of the fluid-solid coupling factor k in Biot's equations for acoustic waves in fluid-saturated porous media, and there is given a wrong relationship among some compressibilities. We are addressing these points and not reviewing the paper as a whole.
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Brown et al. (1979) studied this question.