I don't know if I'm speaking out of turn or not "BUT",
I have the same noise on my 2014 FUSION with 2.0L engine, I got a "check engine light" shortly after that noise started and a code indicating an "over/under turbocharger boost" I forget what the code number is.
My problem is the "Waste Gate Flapper Valve" rattling, check out YouTube about repairing or replacing the turbo charger.
Jim L