radio

Radio

Within the timeline of radio, many people contributed theory and inventions in what became radio. As a result in 1894 the Italian inventor Guglielmo Marconi invented the first radio. It is the first engineering complete, commercially successful wireless telegraphy system based on radio transmission. He demonstrated the application of radio in military and marine communications.

telephone

Telephone

Telephone converts sound, typically and most efficiently the human voice, into electronic signals. They are transmitted via cables to another telephone. Alexander Graham Bell invented the telephone in 1876. He was a teacher for the deaf at Boston University. In researching ways to teach the deaf, he experimented with transmitting sound via electricity. As a result he […]