[DOC] [TLE] Photophone - Wikipedia [PAR] The photophone is a telecommunications device that allowed for the 
transmission of speech on a beam of light. It was invented jointly by Alexander 
Graham Bell and his assistant Charles ... For the sound-on-film technology, see 
RCA Photophone. ... On June 3, 1880, Bell's assistant transmitted a wireless 
voice telephone... [DOC] [TLE] Alexander Graham Bell and the Photophone - Inventors - About.com [PAR] Jun 15, 2015 ... Alexander Graham Bell transmitted the first wireless telephone message on his ... 
wireless telephone message on his newly invented "photophone," a device that 
allowed for the transmission of sound on a beam of light. ... Bell's photophone 
worked by projecting voice through an instrument toward a mirror. [DOC] [TLE] Alexander Graham Bell invents the Photophone ... [PAR] wikipedia notes: The Photophone was invented jointly by Alexander Graham Bell 
and ... The device allowed for the transmission of sound on a beam of light. On 
June 3, 1880, Bell transmitted the first wireless telephone message on his newly-
invented photophone. ... (about 213 m), using plain sunlight as the light source. [DOC] [TLE] Back to the future - In 1880 Alexander Graham Bell invented the ... [PAR] Sep 18, 2016 ... On 3rd June 1880, four years after Graham Bell patented the telephone, he 
transmitted the first ... The photophone was in fact, the World's first device for 
wireless ... Bell's photophone was based on transmitting sound on a beam of light
. A person's voice was projected through an instrument toward a mirror. [DOC] [TLE] Identifying Who Invented the Cell Phon - Conference Call Services [PAR] Bell's idea to transmit sound via light instead of wiring was well ahead of his time, 
... a photophone because it worked by transmitting sound on a beam of light. ... 
The company Motorola, who created a backpacked walkie-talkie in 1940, later 
resolved this problem. ... Car phones are a mobile device fitted into an 
automobile. [DOC] [TLE] Alexander Graham Bell and the Photophone - The Inventors [PAR] ... Bell transmitted the first wireless telephone message on his newly-invented ... 
The device allowed for the transmission of sound on a beam of light. ... Bell's 
photophone worked by projecting voice through an instrument toward a mirror. [DOC] [TLE] Alexander Graham Bell - Phone and other inventions - Carnet de Vol [PAR] The apparatus is actuated using mobile a metal strip, similar to those of the 
clarinets. ... 14 february 1876, Bell's telephone patent application is filed at the 
United States ... Until then, nobody had ever questioned the paternity of Bell 
invented the ... of a device they called a photophone, which transmitted sound 
over a beam of... [DOC] [TLE] Listen to Alexander Graham Bell by Bell Telephone Company Of ... [PAR] Listen to Alexander Graham Bell audiobook by Bell Telephone Company Of ... 
through his knowledge of music and human speech and hearing, invented the ... 
After the Telephone, Bell invented the Photophone (a device that uses a beam of 
light to transmit sound wirelessly), and developed phonographic sound recording
... [DOC] [TLE] Alexander Graham Bell Invented the Photophone [PAR] Alexander Graham Bell Invented the Photophone ... the telephone, Alexander 
Graham Bell (1847-1922) had another invention that used light to transmit sound. [DOC] [TLE] Alexander Graham Bell facts, information, pictures | Encyclopedia ... [PAR] After years of teaching and study, Bell invented Visible Speech, a set of symbols 
... He also began experimenting with the transmission of sounds using his ... 
noteworthy devices including the photophone, a device that transmits sound on a
... [DOC] [TLE] Alexander Graham Bell by Tyler Whitt on Prezi [PAR] He also came up with an idea to convert it back, current to sound, using metal 
reeds ... The device was quickly assembled so that they could find the bullet in ... 
Bell and his assistant, Tainter, created a wireless telephone called the 
photophone. ... Bell and Tainter successfully transmitted their voices through the 
machine a... [DOC] [TLE] Alexander Graham Bell - United States History [PAR] Alexander Graham Bell grew up in Edinburgh, Scotland, in an educational 
environment.

Question: Bell came up with the photophone, a device that transmits sound via this
Answer: (A beam of) Light