NGO compounds can be very vulnerable to civil disturbance, especially when they become the focus an angry crowd’s attention. Walls, fences and gates will only slow determined rioters and not for very long at that. Even armed guards are of little use. Guards from a reputable private security company are unlikely to be willing to fire upon a crowd of their fellow countrymen, nor would humanitarian organizations want them to. So the question is, how does one slow the advancing crowd long enough for staff to seek safety?

The Inferno invisible security barrier might be a solution worthy of consideration for at risk humanitarian organizations. The modules look like sleek high tech stereo speakers but they emit a wall of sound so unpleasant that it forces most people to leave the area immediately. Any intruder who doesn’t leave immediately faces the unpleasant prospects of vertigo and nausea and will have difficulty concentrating on the task at hand.



The system works by emitting a combination of sound frequencies from 2 to 5 kHz. Unlike the comparably loud scream of a regular siren the inferno’s unique frequency combinations have a disturbing but non-permanent effects on human physiology. The system won’t even cause hearing loss without repeated exposure.

Yes, a determined intruder could still get in, perhaps covering his ears, but recall that the intent is not to prevent entry. Rather, the intent is to delay the intruders long enough for staff to seek safety and for assistance to arrive. Like walls and fences you'll need to leave an escape route for staff.

Tags: Tools, Technology