Lyman's Ear

Lyman's Ear - The Sentinel

The LYMAN'S EAR is one of the 19 organs that are implanted into a Space Marine inductee to produce a Battle Brother

Not only does this implant make a Space Marine immune from dizziness or motion sickness but also allows Space Marines to consciously filter out and enhance certain sounds. The Lyman's Ear completely replaces a Marine's original ear. It is externally indistinguishable from a normal human ear.