Looks like a fun project. I can highly recommend Teensy Audio Library for audio projects: https://www.pjrc.com/teensy/td_libs_Audio.html
I wonder how the acoustic measurements were taken. From my own experience propeller noise is highly direction-dependant. For a fair comparison a lot of angle-dependant measurements would have to be considered.
Looks like a fun project. I can highly recommend Teensy Audio Library for audio projects: https://www.pjrc.com/teensy/td_libs_Audio.html
I wonder how the acoustic measurements were taken. From my own experience propeller noise is highly direction-dependant. For a fair comparison a lot of angle-dependant measurements would have to be considered.