The Stealth Enhancer is one of the augmentations in Deus Ex: Human Revolution. "A cranial implant with a series of hair-thin dermal sensors (typically implanted along the crown of the skull), the Stealth Enhancer ties in to the existing vision augmentations and provides a direct feedback to the level of ambient sound generated by the user. The implants central processing unit can also perform instant situation-based analysis of targets identified via line-of-sight, and is capable of predicting he vision cones of these targets with great accuracy, even after loss of direct observation"