Getting Out of Your Fucking Car

The Air Force Research Labs 2018 Anticoic chamber. This is the one that they use now. It's essentially a soundproof room, but in the middle of it has this huge wire spear for recording or something. Jeff: How large does this anecdote chamber have to be because you have to be out of sight of the enemy army and make it sound like you're approaching? And you probably need to test sound like what half a mile away.