Simulated Wave Train (Chin et al.)

Figure 1. Synthetic data generated for a porous glass layer having porosity 28 percent. For the meanings of the various labels see next file.

Laboratory Data (Plona)

Figure 2. Laboratory data on a porous glass disk having porosity of 28 percent.

Biot-Gassmann theory predicts very well the behavior of acoustic signals propagating through a thin porous glass disk immersed in water at high frequencies. But, agreement is often not so good for naturally occurring materials such as fractured rock.