Prerequisites: Restricted to Speech, Language, and Hearing Sciences majors; a course in area B1: Physical Science (Physics or Chemistry is strongly recommended), a course in Statistics (at SF State, courses include MATH 124 or PSY 171 or ISED 160), a course in biological science in one of the following areas: human or animal biology, human anatomy and physiology, neuroanatomy and neurophysiology, human genetics, or veterinary science, a course in social/behavioral sciences in one of the following areas: psychology, sociology, anthropology, or public health. Concurrent enrollment in SLHS 651 and SLHS 655.Structure and function of the ear; sound related to the hearing mechanism; causes, implications, and techniques of determination of hearing impairment. Communicative Disorders majors must earn a C- or better in this course to advance in the major. (Plus-minus letter grade only) [Formerly C D 652]. Enrollment Requirements: Must be Speech, Language, and Hearing Sciences majors to enroll in this course.