An apparatus for stimulating auricular points on the human ear is provided using low voltage pulses that are generated and delivered by portions of the apparatus that may be readily removed from the neck and ear, and then easily replaced by the patient to continue therapy. The piezoelectric-based VAWT may generate electricity in response to a deformation of piezoelectric material. The apparatus also includes a control unit that is coupled to the array and selectively powers a number of acoustic transducers based upon standoff distance between the array and an object-of-interest.