英语词汇“photophone”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

photophone

/ˈfəʊtəʊfəʊn/

Now historical

noun

1 Telecommunications. An instrument for transmitting sound by means of light; specifically that invented by Alexander Graham Bell and Sumner Tainter in 1880.

The sound to be transmitted is made to cause vibrations in a mirror. Reflected light from this is detected by a photoelectric cell, and the variations in the resulting electric current are used to reproduce the sound..

2 Film. A system for producing synchronized soundtracks on films. Now disused.

Origin

Late 19th century; earliest use found in Alexander Graham Bell (1847–1922), teacher of deaf people and inventor of the telephone. From photo- + -phone.

单词	photophone
释义	photophone /ˈfəʊtəʊfəʊn/ Now historical noun 1 Telecommunications. An instrument for transmitting sound by means of light; specifically that invented by Alexander Graham Bell and Sumner Tainter in 1880. The sound to be transmitted is made to cause vibrations in a mirror. Reflected light from this is detected by a photoelectric cell, and the variations in the resulting electric current are used to reproduce the sound.. 2 Film. A system for producing synchronized soundtracks on films. Now disused. Origin Late 19th century; earliest use found in Alexander Graham Bell (1847–1922), teacher of deaf people and inventor of the telephone. From photo- + -phone.
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