A single bowling pin my local bowling ally got me for my birthday getting knocked on the ground of my room. Recorded and processed in audacity (headset mic).
Popping sound made with my mouth. . . Sounds like a coconut, popping, or knock on the head. No effects used except noise reduction. Recorded at home on conexant smart audio with at2020 mic. Processed on audacity.
Some small pieces of wood loosely handled to make lots of noise when they knock together. Sounds like kindling being carried in someones arms. Maybe useful for combining with other noises to make a messy crash. Recorded in treated room with shure sm58.
I left my phone inside a wooden cupboard and tried to call it back outside by knocking on a glass door. Did it listen? it’s a secret. Recorded with redmi note 5 phone, denoised and filtered bogus sub bass in audacity.