Before revision: Membrane-protein systems constitute an important avenue for a variety of targeted therapies. The ability to alter these systems remotely via physical fields is highly desirable for the advance of noninvasive therapies. Biophysical action of acoustic fields in particular holds immense potential for applications in drug delivery and neuro-modulation. Here we investigate the optical response of solvato-chromic fluorescent probe Laurdan, embedded in multilamellar lipid vesicles, subjected to broadband pressure impulses of the order of 1Mpa peak amplitude and pulse width of less than 10 \mu s. The response is quantified in terms of the shift in fluorescence spectra using a ratiometric technique . Based on the fluctuation dissipation theorem applied to a coupled membrane-fluorophore system,
After revision:  \mu s. The response is quantified in terms of the shift in fluorescence spectra using a ratiometric technique . Based on the fluctuation dissipation theorem applied to a coupled membrane-fluorophore system,