Hello, my name is Rick and I'm here to answer any of your electrical questions.
Is it windy where you live, or even breezy? There is a flap that could be flapping back and forth.
Could this be the sound you are hearing?
If this helped you, please rate my answer. If not, please let me know and we could continue.
no this is an electrical noise....definitely not a flapping
Do you have a voltage tester?