Calibration Methods for Near-Field Acoustic Imaging Systems

An acoustic fingerprint imaging system is disclosed. In one embodiment, a controller can be coupled to a plurality of delay lines, each associated with a particular transducer. The controller can determine an interrogation point to focus acoustic energy. The controller can direct each of the plurality of delay lines to apply a delayed activation pulse to each transducer based, at least in part, on the transducer's distance from the interrogation point.