Sputnik beep

One of the iconic sounds of space exploration. News reports at the time pointed out that "anyone possessing a short wave receiver can hear the new Russian earth satellite as it hurtles over this area of the globe".[67] Directions, provided by the American Radio Relay League were to "Tune in 20 megacycles sharply, by the time signals, given on that frequency. Then tune to slightly higher frequencies. The 'beep, beep' sound of the satellite can be heard each time it rounds the globe." Recording by NASA. 

Part of the Space is the Place project - for more information, see http://www.citiesandmemory.com/space