Implementations of a ballistic helmet are provided. The ballistic helmet comprises two armor plates, each armor plate can be positioned to cover an ear of a wearer and thereby provide ballistic protection. In some implementations, the ballistic helmet may further comprise two earcup adapters, each earcup adapter is configured to be mounted on an interior side of an armor plate and to allow an attached earcup to rotate thereon. In this way, each earcup may be comfortably positioned over an ear of the wearer and thereby attenuate sound.