Place this clip at the very start of a space history edit to set the era, then follow it with a camera shutter sound for archive photos and finish with a bell ding when your title card lands.
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This short clip is a clean run of the repeating electronic beeps transmitted by Sputnik 1, with the harsh static removed. Lasting just under four seconds, the steady pulses feel eerie and nostalgic, like hearing the very start of the space age calling back.