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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]
May 8, 2024 · 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.
Choose from a cordless phone, DECT phone, and more to enjoy a dependable phone connection. Leave your own personalised message service with a recorded family message tone and give yourself a break from the rush of calls that come from mobile phones – particularly when it’s a business phone.
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".
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, worked on other projects 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.
Jul 29, 2023 · Learn how telephones convert sound into electrical signals and send them over wires or airwaves. Discover the origins of the telephone and its evolution from a simple device to a global network.
