Before revision:  The estimate of the thermodynamic susceptibility is shown to hold not only for quasi-static near-equilibrium measurements, but also for dynamic state changes in lipid vesicles induced by broadband pressure impulses of the order of 1 MPa peak amplitude and 10 microsecond  pulse duration.
After revision:  The estimate of the thermodynamic susceptibility is shown to hold not only for quasi-static near-equilibrium measurements, but also for dynamic state changes in lipid membranes during an acoustic impulse. Solvation sensitive fluorescence probes, Laurdan, embedded in multi-lamellar lipid vesicles in water, were exposed to broadband pressure impulses of the order of 1 MPa peak amplitude and 10 microsecond pulse duration.