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This is On Point. I'm Megna Chakra-Bardi. In 1824, 15-year-old Louis Braille invented a new alphabet.

He was three years old when he'd injured one of his eyes with a leather working all, and he had lost his sight completely by the time he was five. At 10, Braille received a

scholarship to the National Institute for Blind Children in France, and it was there where he invented

his new alphabet. Braille is based upon a grid of dots small enough to fit under the tip of your

finger.

These dots are numbered one through six, and when raised in different combinations,

represent different letters, numbers, and punctuation marks. This new technology allowed him and visually impaired people world over to read.

In 1916 at Bell Labs,

Harvey Fletcher helped build the Western Electric Hearing Aid,

the first functional electronic hearing aid.

...