Review on Edifier H840 Audiophile Over-The-Ear Headphones - Hi-Fi Closed Monitor Music Listening - Blue by Heather Powell

. I wore them to work to block out the noise around me - 30 minutes later I put them back in the box and printed out the return label. My work colleague also tried them and said that they don't block noise well either and that the volume should only be so high that you get a headache! Noise isolation is not noise cancellation. The sound is ok if you want good sound and they fit well, but if you want noise cancellation then don't use it.