When Offered: Fall; Spring The science of hearing and the etiologies of hearing impairment. Prerequisites: CSD 2259, CSD 2260, CSD 2464, and CSD 2465; or permission of the department chair; and admission to the Communication Sciences and Disorders program. [Dual-listed with CSD 5364.] Dual-listed courses require senior standing; juniors may enroll with permission of the department.