I own Audio-Technica over ear noise canceling headphones that I bought a few years ago and I have been happy with them. I am considering upgrading to Bose QC20 in-ear headphones and was thinking: What would happen if I use the QC20 in-ear and over them, I put in the Audio-Technica (without the cable of course)? Does it mean I will get double the noise cancelation? Has anyone tried something similar? It will probably look weird but will it get me the results?