I’m just wondering how, a friend of mines wife had a baby a couple months ago and he was born both deaf and blind unfortunately, how is it some deaf and blind people can read braille, how do they understand how to read it originally if they can’t hear a person explain to them? If someone is deaf/blind from birth how would they ever know?
Giving the answer "Helen Keller" doesn’t explain how to teach someone!
You start with the basics — nouns. Water, for instance. Repetition is key. Instructors do hand-on-hand signing, which is when they introduce the subject to an object (ie, they put the child’s hands in water) and then the instructor puts her hands on the child’s hands and shows the child how to make the "sign" for water. Over and over, until the child learns what she is doing and what it means. Repeat this for all sorts of nouns. Then concepts can be taught, when vocabulary is built. This helps the child communicate to normal people. But since the child cannot see, normal people must be able to spell out words into the child’s hands, or offer them braillle, to communicate with them. So, once the child can sign and understands what objects are, spelling can be taught. So the instructor will put the childs hands into water, for example. The child does the sign for water, and the instructor confirms that the child is right. Then the instructor will introduce the braille "spelling" of it, or, as with helen keller, teach the child the alphabet and spell out each letter into the child’s hand. Again, repetition is key.
This could take decades to perfect, but children are resilient and human beings require communication, so the motivation to learn is there. There are also tools available now, special hearing aids that create vibrations in the ear and while the child doesn’t "hear" what we hear, they can hear noises and such. You should research the story of Emma, Zoe and Sophie Hooker, they are deaf-blind triplets. Their story aired two days ago on Discovery Health.