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.
preÂ·linÂ·gual deafÂ·ness. hearing impairment occurring before development of speech and language skills. Hearing loss that precedes the onset of speech or learning spoken language; it is severe, stable, and less common than post-lingual hearing loss. prelingual deafness. Hearing impairment that is present in infancy and childhood, before language skills are acquired.