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--- project_ideas:drone_detection:start [2023/02/19 10:55] – [Acoustic] rolf.becker
+++ project_ideas:drone_detection:start [2023/02/19 10:58] (current) – [Off-Topic] rolf.becker
@@ Line 7: / Line 7: @@
   * https://www.wildtronics.com/parabolic.html
+===== Off-Topic =====
+  * https://martinmitchellsmicrophones.wordpress.com/2018/05/28/the-parabolic-microphone/
+[[https://martinmitchellsmicrophones.wordpress.com/2018/05/28/the-parabolic-microphone/|{{https://martinmitchellsmicrophones.files.wordpress.com/2018/05/parabolic-ears.gif?300}}]]