In space no one can hear you scream, right?

The Naked Scientists are about to boldly scream where no one has screamed before: from a helium balloon bound for the edge of space...

What we want to find out is how the falling atmospheric pressure affects the sound of a scream.

To do it, we've built a system to mechanically separate a speaker and a microphone, and we've programmed a computer to play and record the screams as the balloon heads into the stratosphere.

Here we're are at the testing stage, where we're checking that our rig can withstand the near-vacuum of space...