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Telephone, an instrument designed for the simultaneous transmission and reception of the human voice. It has become the most widely used telecommunications device in the world, and billions of telephones are in use. This article describes the modern telephone’s components and traces its historical development.
This instrument was further developed by many others, and became rapidly indispensable in business, government, and in households . The essential elements of a telephone are a microphone ( transmitter) to speak into and an earphone ( receiver) which reproduces the voice at a distant location. [3]
Jul 18, 2023 · A telephone line is at the heart of the telephone system. These lines are interconnected — forming a vast network that spans cities, countries and even continents, meaning you can reach people all over the planet.
May 21, 2021 · Two men invented the telephone, but Alexander Graham Bell is the one most people today remember. Learn all about Bell and the history of the telephone.
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.
The master telephone patent granted to Bell, 174465, March 10, 1876. The modern telephone is the result of the work of many people. Alexander Graham Bell was, however, the first to patent the telephone, as an "apparatus for transmitting vocal or other sounds telegraphically".
Jul 29, 2023 · One pair is an output: it takes outgoing electrical signals from the microphone to the telephone system; the other pair is an input: it takes incoming signals from the telephone system to the loudspeaker.
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.
The invention of the telephone exchange provided the solution for establishing telephone connections with any other telephone in service in the local area. Each telephone was connected to the exchange at first with one wire, later one wire pair, the local loop.
Nov 9, 2009 · Alexander Graham Bell is known for his many inventions, especially the telephone and a metal detector. He later created the Bell Telephone Company, now AT&T.
