Beep, beep … (1957)
Description: The beeping of the Sputnik radio transmission back to Earth could be heard around the world by ham radio operators along the band of its orbit.
Sputnik Launch (1957)
Description: Muffled cheering from Muscovites assembled in Red Square greets the announcement of the triumph of Soviet science.
Source: Kennan Institute-National Public Radio: Russian History Audio Archive