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.
Definitions. Hearing loss is considered to be the most prevalent congenital abnormality in newborns and is more than twice as prevalent as other conditions that are screened for at birth, such as sickle cell disease, hypothyroidism, phynilketonuria, and galactosaemia (Finitzo & Crumley, 1999).