My experience is I cannot recall many dozen batches of three 5" shield fletched, especially high profile ones where there were not some plain noisy arrows in the mix, sometimes half or so. On the other hand I honestly have never found three 5" parabolics to be noisy save a couple of carbons one time that had a gap in the middle of the glue line. My friend Rod Kelley (Mountaintop Traditional Arrows) in Kalispell, MT. has burned some low profile shields for me and these have all been quiet.