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Looks like a fun project. I can highly recommend Teensy Audio Library for audio projects: https://www.pjrc.com/teensy/td_libs_Audio.html


Mozzi (for Arduino) is also great!

https://sensorium.github.io/Mozzi/


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.


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