Research Activities Auditory Neurophysiology Two-Tone Suppression Shown to be the Result of Non-Linear Properties of the Peripheral Auditory System Electrocardiographic Cardiac Imaging Inferred Heart-Surface Potentials from Body-surface Electrocardiographic Maps Change in Backscattered Energy (CBE) Ultrasonic Temperature Imaging Risk for VT Probability of Ventricular Tachycardia Risk in Patents with a Myocardial Infarction as a Function of Electrocardiographic Frequencies Ultrasonic Synthetic Focus Imaging AIUM Test Object Wire with Different Assumed Speeds of Sound (Actual 1520 m/s)30 x 30 mm Images of the Central Wires of the AIUM Test Object. Left) Plane wave focus, Center) Zero-Offset Focus, RIght) Complete DataSet Focus Technology in Health Care Surgical Intensive Care Unit in Barnes Hospital with Electrical System and Instrumentation Designed by Engineers at the Biomedical Computer Laboratory