Hi HN!<p>Recently while working on my newsletter [0] I came across Zipline using microphones on their fixed-wings for aircraft detection, creating a very informative blog post in the process. I'll be curious to seeing if they manage to get this solution certified, given that they cannot detect balloons and gliders.<p>If you like the linked blog post then you might also like the ICRA 2022 presentation [1] by Gavin Ananda on the subject that goes into even more detail.<p>[0] <a href="https://www.weeklyrobotics.com/" rel="nofollow">https://www.weeklyrobotics.com/</a>
[1] <a href="https://youtu.be/RLc95gnEzok" rel="nofollow">https://youtu.be/RLc95gnEzok</a>