Time-averaged holography has been successfully employed for obtaining high-contrast vibratory patterns of the tympanic membrane [Khanna and Tonndorf, J. Acoust. Soc. Amer. 41, 1904 (1972)]. Nevertheless, this technique has two restrictions: (1) the time delay due to the photographic processing of the holographic plates and (2) its essential inability to give phase information. Attempts to employ real-time holography [Tonndorf et al., J. Acoust. Soc. Amer. 46, 106 (1969)] for the same purpose failed because of (a) its inherent low fringe contrast and (b) its sensitivity to slow, quasi-dc, membrane motions. Real-time holography that includes strobing [Archbold and Ennos, Nature 217, 942 0968)] markedly improves the image contrast, as will be demonstrated on an earphone diaphragm. It also gives both amplitude and phase information. Additional phase modulation [Aleksoff, Appl. Phys. Lett. 14, 23 (1969)], as will also be shown, permits removal of the 180° phase ambiguity. This latter combination holds good promise for application to measurements on biological membranes. [Supported by several NIH grants.]