There are many types and causes of deafness. It may be hereditary (genetic), congenital, or acquired; prelingual (before learning spoken language) or postlingual (after). It can be caused by viruses or other infections, medications, genetic defects, or as part of the aging process. Sometimes it is idiopathic, meaning it happens for no reason at all (that can be determined).
I am a Hearing woman married to a Deaf man, and between us we have Hearing, Hard of Hearing, and Deaf children. Ours is a special world, filled with an amazing array of sights and sounds, thoughts and feelings, playfulness and pain. Interactions with the world outside our comfortable circle often leave the impression that few have adequate or accurate knowledge regarding this physical trait, frequently subjected to varying degrees of misinformation. After all, it IS a hearing world and deafness is different, something to be feared, avoided, or corrected; many of us, having had a full range of special senses throughout our lives, have a difficult time imagining living in a world of silence and what may be missed or lost (hearing your child's first spoken words, first cries, first giggles).
A number of times while in public with my children, we have been approached by kindly (usually elderly) strangers telling my son how cute he is and how beautiful his curls are, asking him how old he is, or just chattering away at him as one normally would do with an adorable toddler. He does not respond, and a quizzical look comes over the stranger's face. He just stares, a look of confusion shot in my direction. I tell my son what has been said and he flashes a 1000-watt smile, and that stranger almost always backs away a step or two. "He is Deaf," I explain; 99 times out of 100, I hear in response "I'm so sorry. Can't they fix that?"
My son is Deaf, not "broken." He does not need to be "fixed." He is capable of communicating his needs and wants, albeit in a language many people do not know. My son "speaks" American Sign Language (ASL). How he handles his communication with the outside world will vary with time, life-altering decisions reserved for when he is old enough to express his own intents and desires (i.e., cochlear implant, lip-reading, speaking, signing, etc.) and he will be exposed to and allowed to explore all of his options, in order to make an informed decision.
Another common myth I have encountered is that "deaf = retarded." Not all Deaf are mentally handicapped and not all MH are deaf; therefore, they do not equate. Most Deaf have normally functioning minds and bodies, the only difference between "them" and "us" being that they do not hear and use a different language to communicate. They go to school, drive, and even use a telephone - all the things hearing people do; they attend and participate in theater, concerts, and motorcycle rallies; they become teachers, lawyers, and doctors, and one was even a famous composer; they have families and lead "normal" lives.
Not all Deaf can read lips or converse in spoken English, but not all Deaf are mute. Hearing aids and cochlear implants are not a "cure" for deafness. Many Deaf do not consider this trait a "disability," rather a "difference." For many, being Deaf is part of their identity, with an entire Deaf "culture" (community), and it is sometimes difficult for a hearing person to gain acceptance into that circle.
Significant barriers stand between "Hearies" and "Deafies," when there is a lack of knowledge of and about ASL, further separating them from the hearing world in both communication and acceptance; this occurs on both sides. I often hear "I always wanted to learn to sign," yet when an offer is extended to teach it (for free), 500 excuses are returned as to why that offer cannot be accepted. I find this not only frustrating but irritating. IF YOU DO NOT MEAN IT, DO NOT SAY IT.
My goal is to raise awareness in the hearing community, to bring down barriers separating our worlds so they will feel more comfortable in ours and, in turn, more willingly accept us into theirs.
ASL is a graceful language with its own grammar and syntax, its own structure and form, and an amazing experience to see and to participate in a conversation with ASL. It is a visual symphony, melodies in motion, and after having seen and felt it, your whole body sings its rhythms.
For a glossary of terms related to deafness, please see MedicineNet.com.