I hadnt even tried adding the additional bandwidth required by voice yet. I bought this to do rows with and some front squats and its amazing! This is perfect because it?s long enough and charged super quick still! This meant that the corset ended up fitting her like a Tshirt - which, obviously, is not how a corset should fit. They are very comfy. Overall love these! I use them for running and find that I have to adjust them quite often as they do not fit that well in my ears. I had a second set of hands trying to put the top on, to no avail. The earpad cushioning is worse, not as soft or plush. Seem to run a bit large but not too bad.