Radio waves and sound

Radio communication evolved from just transmitting Morse code to sending continuous signals containing sound information. This was achieved through amplitude modulation, allowing radios to transmit and receive sound waves.
 Reginald Aubrey Fessenden United States 1906 Radio waves and sound

Radio communication evolved from just transmitting Morse code to sending continuous signals containing sound information. This was achieved through amplitude modulation, allowing radios to transmit and receive sound waves.