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by ZeikJT 1699 days ago
There was a thread on here a while back where people would set up cameras and be able to make a motion image showing what parts moved with a regular frequency. Was being used at factories to determine points of failure via vibration. Can't find the thread now though.
1 comments

Aha, it was a video by Steve Mould: https://www.youtube.com/watch?v=rEoc0YoALt0