William A. Yost, Ph.D., has been professor and chair of Speech and Hearing Science at Arizona State University since 2007. He was previously a professor of psychology, adjunct professor of hearing sciences of the Parmly Sensory Sciences Institute, and adjunct professor of otolaryngology at Loyola University Chicago. He is the former associate vice president for research and dean of the graduate school, former director of the Parmly Hearing Institute, and former director of the Interdisciplinary Neuroscience Minor at Loyola University Chicago. He was a National Science Foundation Postdoctoral Fellow at the University of California at San Diego from 1970–1971 and on the faculty at the University of Florida from 1971– 1977 before coming to ASU.

Yost received a doctorate in Experimental Psychology from Indiana University in 1970 and a bachelor's degree in Psychology from Colorado College in 1966. He has published more than 275 reports, articles, book chapters and books in areas of hearing science, especially auditory behavioral neuroscience. He is a fellow of the Acoustical Society of America; the American Speech, Hearing, and Language Association; the American Psychological Society; and the American Association for the Advancement of Science. Yost received an honorary degree of doctor of science from Colorado College in 1997 and was Faculty Member of the Year (1994) at Loyola University Chicago. He also received the Silver Medal in Psychological and Physiological Acoustics from the Acoustical Society of America.