Bell Alexander Graham, *3 March 1847 Edinburgh, †2 August 1922 Baddeck (New Scotland), American physiologist and physicist of Scottish origin. He received a comprehensive education, i.e. musical and medical. He specialised in speech physiology under the supervision of his grandfather and father, authorities in this field. In 1872, he opened the School of Vocal Physiology in Boston, a school for training teachers of deaf children. In 1873, he became a professor of vocal physiology at the University of Boston. His primary work is The Mechanism of Speech (1907). He also worked on voice recording methods and electrical transmission of sound at a distance. He made many inventions in these fields, the most important of which was the invention of the telephone (1876).
