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Alexander Graham Bell


 Image  Alexander Graham Bell was born on March 3, 1847 in Edinburgh, Scotland. Alexander Graham Bell showed a sensitive nature and talent for art, poetry and music that was encouraged by his mother. When Alexander was 12 years old, his mother started to lose her hearing ability. This situation trigged Alexander to develop a technique of speaking in clear, modulated tones directly to his mother’s forehead so she would hear him more clearly. His mother’s deafness also leads Alexander to study acoustic.

   Alexander who attended the University of Edinburgh did many experiments on human voices. He also tried to transmit voices thought a phonautograph, a pen like machine that could draw shapes of sound wave on smoked glass by tracing their vibrations.

   In 1875, Alexander Graham Bell developed an acoustic telegraph and drew up a patent application for it. On March 7, 1876 the US patent office issued a patent to Bell for the telephone.

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