Noise-cancelling headphones use different types of interference technology patterns to block outside noises and enrich the sound quality. Because they block out so much noise, the volume can be kept much lower than normal headphones. They generally come in either in-ear or over-the-ear styles may require battery power to make the noise cancelling capabilities active.
Behind the head headphones hold earbuds or on-ear headphones in place with a band that rests between the head and neck. The band can mostly be hidden underneath hair or behind a collar. These headphones are also beneficial for a listener who will be moving around- who wants more support than just earbuds but doesn’t want the over-the-head headphones.