What's AVRS?

The Easton Z flex stabilisers have an "AVRS chamber for rapid vibration amplitude dissipation after the shot", but it's not explained what this actually means on their website and I couldn't find a relevant patent. Searching online, it seems like it stands for Active Vibration Reduction System, in which "active" indicates that there's a circuit with a vibration sensor and an actuator that actively cancels out vibration. It's not a common acronym.

Given electronics aren't allowed in/on bows...

What's AVRS?