Lately, I am holding a lot of vconfs on Google Hangouts. I'm using a headphone set but the internal mic is capturing the input sound. Apparently, if I move a bit away from my iMac or if I speak softer, the system increases (adjusts) that volume automatically. That is all very nice except that then, I start hearing my own echo on the other end! (I mean, transmitted back to me from my vconf partner amplified and delayed).
Does anybody know of a way to prevent that (automatic) behaviour? For instance, to limit the volume instead of just setting it up.