Dr. William Clark is the Director of the Program in Audiology and Communication Sciences (PACS) at Washington University School of Medicine in St. Louis, Missouri, where he also holds the rank of Professor in the Department of Otolaryngology and the Department of Education. The PACS program trains teachers of the deaf, audiologists, and research scientists. Prior to his appointment in the School of Medicine, Dr. Clark was a Senior Research Scientist at CID and served as the Chairman of the Department of Speech and Hearing at Washington University. He has taught basic and advanced courses in ac...