The ongoing mystery in what the sound is in my 2023 Carbon Cub FX3. This is the second of a series. First video was outside the airplane, link below. This is a cockpit video, hopefully someone out there can tell me what is causing this annoying hum. No vibration, no stick shake just a hum. Seems to be on the left side of the airplane. Any ideas out there?

First video outside the airplane:
   • Resonance Humm, Carbon Cub FX3  

Video from 8 years ago of the aileron cable in my 1954 PA18:
   • Aileron Cable  

0:00 Intro
2:34 Landing Spring Bay
4:05 Aileron Cable
5:41 Landing IS00
7:48 Landing 4IL9
8:57 Landing C75
10:45 Landing 9IL0
12:44 Landing Bradford IL Crop duster
13:35 Landing 2IS3
14:43 Approach and landing 3MY, Mt Hawley
16:38 Conclusion