Hearing is one of the five senses. It is a complex process of picking up sound and attaching meaning to it. The ability to hear is critical to understanding the world around us. The human ear is a fully developed part of our bodies at birth and responds to sounds that are very faint as well as sounds that are very loud. Even before birth, infants respond to sound.When describing hearing loss, we generally look at three categories: type of hearing loss, degree of hearing loss, and configuration of hearing loss. With children, it is especially important to diagnose and treat a hearing loss as early as possible. This limits its potential impact on learning and development. Hearing loss can greatly affect the quality of life for adults as well. Unmanaged hearing loss can have an impact on employment, education, and general well-being.