@benjojo for a moment I thought it was an exponential horn that you attach to the fan outlet to match the impedance and make it easier for the noise to escape
@benjojo So, what you're telling me is that someone who can break in can now go "Testing, testing", or start a fire alarm, on unsuspecting people over the internet, and have them scramble in terror? 😛
@phooky@benjojo It's for their security system. They also sell CCTV cameras with image recognition and an access control solution, so you can have it automatically scream at intruders. Or that one coworker you don't like, I suppose.
@benjojo I remember when we were in Lavington St I investigated having a remotely triggered air horn based on decibel reading on the other side of the office.