This video describes the auditory (hearing) and vestibular (balance) systems in the body and highlights balance research conducted by the Audiology Unit at the National Institutes of Health (NIH). Audiology Unit staff from the NIH’s National Institute on Deafness and Other Communication Disorders (NIDCD) develop and conduct hearing and balance research. To learn more about the NIDCD and its research, visit our website at https://www.nidcd.nih.gov.