Αποτελέσματα Αναζήτησης
Shows Bell's second telephone transmitter (microphone), invented 1876 and first displayed at the Centennial Exposition, Philadelphia. This history of the telephone chronicles the development of the electrical telephone, and includes a brief overview of its predecessors.
Learn about the telephone, an instrument for transmitting and receiving human voice, from its invention by Alexander Graham Bell to its modern digital design. Explore the functional components, the public switched telephone network, and the related technologies of telecommunications.
20 Σεπ 2024 · Learn about the history of the telephone and how it was invented by Alexander Graham Bell and Thomas Watson in 1875. Discover the key events, inventions, and people that shaped the telephone industry in the United States and beyond.
9 Νοε 2009 · Learn about the life and achievements of Alexander Graham Bell, the Scottish-born scientist who invented the telephone in 1876. Explore his other inventions, patents, quotes and legacy in communication and science.
Learn about the invention, evolution and global impact of the telephone, a device that converts sound into electronic signals. Explore the timeline of early development, the controversies over credit, and the types of telephones and networks.
This timeline of the telephone covers landline, radio, and cellular telephony technologies and provides many important dates in the history of the telephone. Charles Bourseul. Johann Philipp Reis. Elisha Gray.
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.
