Dr. Charles H. Sherman received the B. S. degree from the Massachusetts Institute of Technology and the M. S. and Ph. D degrees from the University of Connecticut. He worked mainly at the Navy Underwater Sound Laboratory in New London, CT, but also at Tracerlab, Inc. in Boston, MA, and Parke Mathematical Laboratories in Carlisle, MA, and now works at Image Acoustics, Inc. He has presented and published over thirty papers related to acoustics and transducers, and was elected Fellow of the Acoustical Society of America in 1974. He taught advanced acoustics at the University of Connecticut and tr...