I recently bought a Logitech C920 webcam for my mac mini. Image quality was phenominal, but what I've run into is that when people talk they hear themselves. I've tried everything adjusting the frequencies in the MIDI setup all of it. The only thing that worked was turning my volume down so low I couldn't hear them talking. Conversely I had an old C615 on a different computer, when I installed it, the problem went away. I'd prefer the nicer camera, but i can't have the other end be hearing themselved when they talk. They find it too distracting. Am i missing something? I noticed that there was a mention of noise canceling on the logitech website. If the C920 doesn't supprot it, is there a different model that does?