From Growing Horizons

Hyperwaves are the N dimensional equivalent to electromagnetic waves and traslate through N dimensional spaces, such as Heim-Feynman Space and Hyperspace with superluminal velocities.

Most Hyperwaves are natural in origin, and are produced by black holes and rotabing neutron stars. However, Hyperwaves can be produced artificially by an object translating into and out of Heim-Feynman Space or Hyperspace, as well as specialized transceivers.