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.
In ear headphones are earphones that go directly into the ear canal. They are great for reducing outside noise. They are generally made of silicone rubber, elastomer, or foam. This type of headphone is great for anyone that moves around- they are lightweight, easily portable, and stay in the ear with a lot of movement. They tend to be more expensive than regular earphones. The two main types of In Ear headphones are universal (standard issued by a manufacturer to fit the average ear) and custom (fitted specifically to the listener’s ear canals by the manufacturer).