From: ANIMAL SY3T.s:"i.S Edited by RC:1e-GL!Y Dusn;;l and James F. Fish (Plenum Publishing CCJ!poration, 1980) SOUND RECEPTION IN THE PORPOISE AS IT RELATES TO ECHOLOCATION James G. McCormick Department of Otolaryngology Bowman Gray School of Medicine Wake Forest University Winston-Salem, North Carolina 27103 E. G. Wever Auditory Research Laboratories Princeton University Princeton, New Jersey 08540 S. H. Ridgway Naval Ocean Systems Center San Diego, California 92152 J. Palin Auditory Research Laboratories Pr inceton Univer sity Princeton, New Jersey 08540 INTRODUCTION Previous to the work of our group which was published in 1970 (McCormick, et al., 1970), all theories of hearing in Cetacea were based on dissections and experiments with dead specimens. Such experiments continue to be published in the literature to this day, and just as the earlier studies of dead material did, they only serve to confound the many students and investigators of Cetacean hearing, especially those who have little formal training in the science of physiological acoustics. Our study was conducted with careful procedures and controls for artifacts, utilizing the electrophysiological method best suited for the study of middle and external ear mechanics of the 449