If I understand what you're trying to say . You have got it backwards.
Are you saying thinner cranks put off more vibration?
Flatter crankbaits produce more vibration. Just imagine taking a round baseball bat and a flat bat and swinging them back and forth underwater.
If you want maximum water disturbance, get a flatsided bait with a wide wiggle (not necessarily a wide wobble).
In dirty water, though, my preference is for baits that have a high frequency action (lively). They move more and emit more vibration in a shorter distance traveled.
People talk so much about how great vintage Bagley B's are....well, this is why. They have a tight, lively action.....new ones don't - they have a wide rolling action (that I don't usually like).