The sound quality is otherwise average, our depending on your choice of music, better than average, but not exceptional in any way. There are over the ear headphones that cancel out more noise than these without the need for a battery and tricks for 2X the price
If you are looking for a gadget that runs on equal amounts of 1.5 volts and faith in a product - this might do the trick
If you are looking for silence; this is not the right set of cans