The mask is engineered with aerospace-sourced acoustic absorbers which contain most voice vibrations. "The way it works is we have resonators placed inside. So, the resonators will catch all the different frequencies of your voice, such that when you emit your voice, it will go along the walls of the mask, and everything will get absorbed, so nothing will come out,” explains Gauthier Daridon from Skyted. Toulouse-based Skyted is backed by big companies in the aerospace industry, including Airbus and the European Space Agency. Daridon, says there’s lots of interest in their mask - from business people to the military and special forces.