It is a drone. But "drone" by itself is primarily used to refer to aircraft. I thought the title referred to some sort of ultra-endurance aircraft.
Merriam-Webster defines drone as "uncrewed aircraft or vessel"; Cambridge limits it to "aircraft". When the drone is not an aircraft, it's often preceded with its type: for example, "underwater drone" or "ground drone".
No hearing aid magnification comes close if the induction loop is properly installed and integrated with the PA system. With an induction loop it's as if the microphone is directly connected to the hearing aid.
https://en.wikipedia.org/wiki/Axial_twist_theory