The TX-12 is a micro aerial drone — each unit barely larger than a hummingbird — that produces a single, precisely tuned acoustic frequency. One TX-12 is inaudible. Fifty produce a mild headache. Two hundred create an acoustic environment that induces severe nausea, disorientation, and panic. Five hundred can cause permanent hearing damage and, in documented cases, fatal cerebral hemorrhage.

The Chorus operates on the principle of constructive interference — each unit's output is individually harmless, but when hundreds synchronize their frequencies, the combined acoustic energy reaches weapon-grade intensity. The swarm distributes itself around a target area, ensuring uniform coverage and preventing acoustic shadows. The effect is inescapable within the engagement zone — there is no direction to run that reduces exposure.

TESSERA markets the Chorus as a 'scalable non-lethal deterrent' — which it is, at low swarm counts. The problem is that scalability goes in both directions, and the difference between 'deterrent' and 'lethal' is a matter of how many units are deployed. A security contractor who starts with 200 and finds them insufficient can simply release another 200 from reserve, crossing the lethality threshold without any change in authorization or equipment. The escalation is frictionless.