You know very well that hearing is the ability to hear. But what is hearing loss? Hearing loss , or hearing impairment , occurs when there is a problem with one or more parts of the ear, the nerves that exit the ears, or the part of the brain responsible for hearing. The word "deficiency" means that something is not working well or as well as it should. People may also use the words deaf, deaf, or hard of hearing when talking about hearing loss. Quietum plus