The travel times of seismic waves through the Earth's interior provide one of the only direct constraints of the chemistry and properties of the deep mantle. Calcium perovskite is the third most abundant mineral throughout the lower mantle (~ 700 - 3000 km depth in Earth), but because it is not stable at room conditions the speed that sound travels through this phase is almost completely unconstrained. We will perform inelastic neutron scattering measurements on MERLIN to measure the full phonon dispersion of the titanium end member of calcium perovskite. From this data we will extract the acoustic wave velocities in calcium perovskite between room temperature at ~ 1500 celsius, revealing whether its presence in the deep Earth may explain heterogeneous seismic signals that are currently not understood.