Search Results for: Radio broadcasting incorporating sound recording
black, a telephone (derived from the greek : τῆλε, tēle, "far" and φωνή, phōnē, "voice", together meaning "distant voice"), or phone, is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly. a telephone converts sound
, typically and most efficiently the human voice , into electronic signals that are transmitted via cables and other communication channels to another telephone which reproduces the sound to the receiving user. in , alexander graham bell was the first to be granted a united states patent for a device...
https://en.wikipedia.org/wiki/Telephone