In the world of earbuds, there are two ways unwanted ambient sounds are eliminated, either passively (isolation) or actively (cancellation).
UE FITS use passive noise isolation. Isolation is achieved by creating a perfect seal inside your ear canal with our custom molding tips. The snug seal and perfect fit you get after molding your custom tips will serve as a shield to block out unwanted noise while you listen to the crisp flow of your music, just the way it was meant to be heard.
On the other hand, active noise cancellation is achieved by cancelling ambient sounds digitally. This is done by playing inverse frequencies to cancel the outside noise, this can affect the crispness of your music as these frequencies interfere with your music and can leave your ears more fatigued due to the constant sound pressure needed to overcome outside noise.