MIT recently announced its research on toroidal propellers to create quieter drones. That got [Major Hardware] thinking about noisy PC fans. The obvious solution was to adapt the toroidal shape ...

Whisper is somewhat hush on its work in this area, but did reveal details on its drone work for the agency. On a drone, a Whisper fan can act like a tiny electric jet engine, since a low-flying ...

A team at MIT’s Lincoln Lab has developed a new propeller shape that significantly reduces the noise associated with drones. [PDF via NewAtlas] Inspired by some of the experiments with “ring ...