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Photophone - Wikipedia
The photophone is a telecommunications device that allows transmission of speech on a beam of light.
Alexander Graham Bell and the Photophone - ThoughtCo
2019年3月7日 · The photophone functioned similarly to the telephone, except the photophone used light as a means of projecting the information, while the telephone relied on electricity. The photophone was the first wireless communications device, preceding the invention of the radio by nearly 20 years.
RCA Photophone - Wikipedia
RCA Photophone was the trade name given to one of four major competing technologies that emerged in the American film industry in the late 1920s for synchronizing electrically recorded audio to a motion picture image.
Photophone: How Alexander Graham Bell Transmitted Sound by …
On June 3, 1880, Alexander Graham Bell transmitted the first wireless telephone message on his newly invented “photophone,” a device that allowed the transmission of sound on a beam of light. This took place 19 years before the first wireless radio transmission.
The Photophone - Scientific American
For rapid communication between distant exploring or surveying stations, tbe photophone also promises to be serviceable.
Back to the future - In 1880 Alexander Graham Bell invented the ...
2016年9月18日 · The photophone was similar to a contemporary telephone, except that it used modulated light as a means of wireless transmission while the telephone relied on modulated electricity carried over a conductive wire circuit.
Alexander Graham Bell Invents the Photophone, the First Wireless ...
On April 1, 1880 American inventor Alexander Graham Bell and his then-assistant Charles Summer Tainter transmitted the first wireless telephone message on a beam of light for 213 meters between the roof of the Franklin School and the window of Bell's Washington, D.C. laboratory using the photophone.
The Remarkable ‘Photophone’ of Alexander Graham Bell
2018年9月30日 · What, I can hear you asking, is a photophone? This invention was much like the telephone Bell had arguably already invented, but was designed to transmit sound using a beam of light instead of using electricity.
Photophone - Simple English Wikipedia, the free encyclopedia
The photophone is a telecommunications device that allows transmission of speech on a beam of light. It was invented by Alexander Graham Bell along with his assistant Charles Sumner Tainter on February 19, 1880. Bell believed that the photophone was his most important invention.
The Photophone: When Light Transmits Sound - BigSoundBank
2024年11月15日 · The photophone is based on a simple but forward-thinking concept: using a beam of light to carry sound information. Unlike the telephone, which uses wires to transmit voice, the photophone uses light waves.