This is simply a naill tapping on a glass surface. Its a little fast tempo, irritating if you will. This was recorded at the open window institute sound booth in centurion, south africa.
Knocking tree times on a metalic door, close up, several takes. Note that a small electric rumble should be removed. France, 2018. Recorded with schoeps ab ortfrecorded on nagra ares bbwave stereo, 48khz, 24bits.
Simple knock on the wooden doorrecorded using zoom h1. You are free to use it anywhere and mix it with anything. No credits required. If used, feel free to leave a link to your product in comments :).
I did this in my room with my own door. I recorded with not the best microphone in the world, so sorry if its not the highest quality. But i hope you still enjoy it!.