I've seen some people doing work on this [1]. I can't remember how much was actually making the drones quieter vs doing signal processing to remove the sound fr

I've seen some people doing work on this [1]. I can't remember how much was actually making the drones quieter vs doing signal processing to remove the sound from on-board audio capture. [1] https://www.dotterel.com/ https://www.dotterel.com/