Hold on to what you have, never let go. Find out what happens in the truth blow below. Oh I think I made a mess, I made a mess. Lyrics taken from http://www.lyricsmode.com/lyrics/c/coheed_and_cambria/random_reality_shifts.html.
The usual definition of a hearing impairment is any lessening of a person's ability to hear. Under the Individuals with Disabilities Education Act (IDEA), hearing impairment has a special meaning. It is a permanent hearing loss or a decrease in hearing that is so significant it negatively affects a child's performance in school or ability to learn.
In general, a physical or mental impairment includes hearing, mobility and visual impairments, chronic alcoholism, chronic mental illness, AIDS, AIDS Related Complex, and mental retardation that substantially limits one or more major life activities.