If you are still looking at this thread, a few shots in the dark:
1. Are the blades mounted loosely? I.e. if you push them around, do the blades move relative to the boot? Maybe they are vibrating.
2. Are the blades straight? Place a straightedge against the blade, first on one side, then the other. If not straight, the blades will be concave on one side, convex on the other. About how many mm do the deviate from straight? Ideally shouldn't be more than a small fraction of a mm.
3. Do the blades get noticeably warmer than the ice when you skate fast? That would be a non-specific sign that something was weird.
4. Not everyone removes burrs. They are often straightened vertical. Maybe you have knocked them flat again. Lightly (don't cut yourself!) run your finger along the side of the blade at the edge. If you can feel a protrusion, they are knocked to the side of the blade, away from the hollow. Now lightly run your finger down the hollow. If you feel a protrusion, they are knocked towards the hollow. By the way, if there are any scratches on the side of the blade, they might do this too.
5. To find uneven edges: Lie nickels against on top of the blade, at various parts of the blade, when the skates are upside down. Or lie Popsicle sticks across that top, for more sensitivity; some pro shops have a magnetic equivalent, but that costs money, whereas Popsicles or generic equivalent are at the dollar store. They should lie flat, with no side-to-side slant. If you can balance the Popsicle sticks well enough, they should lie parallel to each other at different points along the blade. (I'm talking about the U.S. nickel coin, which has a raised rim that makes this work, which is the only part that touches the blade. Not sure if it works with any other coins.)
6. If none of the above, get the blades re-sharpened by someone good. Maybe the problem will magically go away.
7. Conceivably, you could be failing to skate clean arcs, and are skidding sideways. A good skater could look at the tracings left on the ice and figure out if that's true. Or maybe your toe pick is dragging. Those might be a problem with your skating technique. But it's much easier to blame the equipment.
BTW, noise is a waste of energy, and may be slowing down your skating. Plus, coaches and judges are often taught to see scraping noise as a sign of poor skating.
Hope that helps.