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May 8, 2024 · Learn about the invention, development, and features of the telephone, an instrument for transmitting and receiving human voice. Explore the functional components of the modern telephone, such as power source, switch hook, dialer, ringer, transmitter, receiver, and anti-sidetone circuit.
History of the telephone. Actor portraying Alexander Graham Bell in a 1932 silent film. Shows Bell's second telephone transmitter ( microphone ), invented 1876 and first displayed at the Centennial Exposition, Philadelphia.
May 21, 2021 · Learn about the history and evolution of the telephone, from Alexander Graham Bell's experiments with sound and electricity to the development of the transcontinental network and the rotary dial. Discover the role of Elisha Gray, Thomas Watson, and other pioneers in the communication industry.
Nov 9, 2009 · Learn about the life and achievements of Alexander Graham Bell, who revolutionized communication with his invention of the telephone. Find out how he overcame legal challenges, developed other inventions and helped the deaf community.
In the 1870s two American inventors, Elisha Gray and Alexander Graham Bell, each independently, designed devices that could transmit speech electrically. Gray’s first device made use of a harmonic telegraph, the transmitter and receiver of which consisted of a set of metallic reeds tuned to different frequencies.
From its invention in 1876, the telephone remains the greatest innovation in communication technology. Telephone history takes us from its invention, through its development, to the invention of smartphone technologies that we use today.
telephone, Instrument designed for simultaneous transmission and reception of the human voice. It works by converting the sound waves of the human voice to pulses of electric current, transmitting the current, and then retranslating the current back to sound.
