Patent ID: 8839657

Claim:
An acoustic probe calibration system comprising: a waveguide extending from a front end to an opposite back end along a longitudinal axis, the waveguide defining a cavity extending from the front end to the back end; and a moveable piston disposed within the cavity of the waveguide, the piston configured to move within the cavity of the waveguide along the longitudinal axis of the waveguide; wherein an acoustic probe is inserted into the waveguide to define an interior chamber between the acoustic probe and the piston, the acoustic probe configured to measure data that is representative of pressure responses to acoustic stimuli inside the interior chamber; wherein the piston is moveable to a plurality of different positions within the waveguide to change a size of the interior chamber such that the acoustic probe is configured to measure the data that is representative of the pressure responses to the acoustic stimuli within the varying-size interior chamber; and a processor programmed to calibrate the acoustic probe based on the data that is representative of the pressure responses to the acoustic stimuli within the varying-size interior chamber of the same waveguide.