In this paper, we present a recent investigation which shows that the high-speed digital holography is comparable with classical laser vibrometry. Furthermore, an experimental investigation of the vibratory field inside the Acoustic Black Hole is discussed. The principle of digital holography is explained and it is used here to provide a full field measurement of the velocity field at the extremity of the structure.
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J. Poittevin, P. Picart, F. Gautier, C. Pezerat, "High-speed digital in-line holography as multipoint vibrometry to analyze vibrations of structures," Proc. SPIE 9525, Optical Measurement Systems for Industrial Inspection IX, 95251X (22 June 2015);