Post-lingual hearing impairment is a hearing impairment where hearing loss is adventitious and develops due to disease or trauma after the acquisition of speech and language, usually after the age of six.

Post-lingual hearing impairments are far more common than pre-lingual impairments. Typically, hearing loss is gradual, and often detected by family and friends of the people so affected long before the patients themselves will acknowledge the disability.

Causes

In some cases, the loss is extremely sudden. Most often, the cause is unknown. Sometimes, it can be traced to specific diseases, such as meningitis, or to ototoxic medications, such as Gentamicin. In both cases, the final degree of loss varies. Some experience only partial loss, while others become profoundly deaf. Hearing aids and cochlear implants may be used to regain a sense of hearing, with different people experiencing differing degrees of success. It is possible that the affected person may need to rely on speech-reading and/or sign language for communication.

Treatment

In cases where the causes are environmental, the treatment is to eliminate or reduce these causes first of all, and then to fit patients with a hearing aid, especially if they are elderly. When the loss is due to heredity, total deafness is often the end result. On the one hand, persons who experience gradual deterioration of their hearing are fortunate in that they have learned to speak. On the other, they often experience social isolation, because they can no longer understand their friends, who cannot communicate effectively with them. Ultimately the affected person may bridge communication problems by becoming skilled in speech-reading (lip reading), accepting elective surgery to use a prosthetic devices such as a cochlear implant, using a hearing aid, or acquiring skill in sign language for communication.

Social impact

Those who lose their hearing later in life, such as in late adolescence or adulthood, face their own challenges. For example, they must adjust to living with the adaptations that make it possible for them to live independently. They may have to adapt to using hearing aids or a cochlear implant, develop speech-reading skills, and/or learn sign language. The affected person may need to use a TTY, interpreter, or relay service to communicate over the telephone. Loneliness and depression can arise as a result of isolation (from the inability to communicate with friends and loved ones) and difficulty in accepting their disability. The challenge is made greater by the need for those around them to adapt to the person's hearing loss.

See also

• Progressive hearing loss