No one can hear you scream in here

By Ali Green

31 October 2018

2 minute read


The padded cone walls of the anechoic chamber

These walls aren’t scary at all…

Step inside an anechoic chamber and close the door. It feels weird. The walls, floor and ceiling are covered in foam acoustic wedges, and once you’re in, it’s hard to get out.

Creepier still, no one in the outside world can hear even the most blood curdling of screams from anyone inside the chamber.

Normally our scientists use the anechoic chamber to test the sound performance of smoke alarms and emergency warning sounders. But with Halloween approaching, we looked for a scarier use; testing our favourite scream scenes from horror movies of the past…

This week the Infrastructure Technologies team let us into their lab for a Halloween special. And we brought some of our favourite screams with us to test in their specialised sound testing chamber.

So which scream shattered the frequency charts? Spoiler alert – it wasn’t JAWS’ first victim or even the famous Wilhelm sound effect…

Check it out.

Oh, and welcome to the Scream Machine. Mwaa haaa haaa haaa.