These ear canal headphones/earphones [ECHs] are very small and inserted slightly into the ear canal, but they are nothing like lowly 'earbud' designs. Also known as in-ear monitors (IEMs), these will provide the very best seal against outside noise of any headphone design, often well in excess of minus -20dB of noise blocking / attenuation. In addition to the superb ambient noise seal, the precise acoustic coupling to the eardrum of these miniaturized cutting-edge microdriver speakers actually lessens the listening level required to achieve ultra-clear musical detail resolution and full sonic impact since you're not forced to overcome ambient noise with sheer volume. In truth, high-end ECHs are amongst the world's very best sounding headphones at the price.