She was a young girl who had lost her hearing and the ability to speak because of a childhood illness. Her name was Mable Hubbard, and four years later they got married. Although many people though that the plan to invent a human voice transmitter was a waste of time, Alexander refused to give up his dream. He continued his experiments with sound vibration. He even copied the design o the human ear using iron rods and electrical wires to produce the same effect