When you jump on the edge of a wool block it produces vibrations.
Should be pretty easy to reproduce. Put a sculk sensor nearby and jump on the edge of a wool block.
(attaching a video isnt working) https://imgur.com/a/6wNKnsy
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Thank you for your report!
We're resolving and linking this ticket forward as a duplicate of MC-252389, as that ticket contains more detailed information and/or has already been triaged by Mojang.
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Hey there!
This looks to be a duplicate of MC-1133.