Apple 98.5 FM - Bacchus Marsh and Moorabool Community Radio - Guglielmo Marconi is credited with the first radio transmission in 1896 but he didn't transmit voice just a signal. Radio voice
Research and Invention - Radio Year: 1895 Inventor: Guglielmo Marconi In 1895, a young Italian named Gugliemo Marconi invented what he called “the wireless telegraph” while experimenting in his parents' attic. He
A History of Vintage Electronics: The Guglielmo Marconi Collection and the History of Wireless Communications
Biography of Guglielmo Marconi, Italian Inventor
Who Invented Radio: Guglielmo Marconi or Aleksandr Popov? - IEEE Spectrum
Marconi Transmits Radio Message
Marconi and the South Wellfleet Wireless - Cape Cod National Seashore (U.S. National Park Service)