07-31-2015, 01:02 AM
The Vortex has (unnecessary) vents just below and behind where your ears are. I removed the liner and blocked those vents with duct tape then replaced the liner. I feel it reduced the noise slightly. Not a huge improvement but a noticeable one. I imagine if you were to take the added step of adding some foam in the area of the vents, then taping them up, it would help even more.