Still, it was, all in all, a good start. Jax was congratulating himself when Dejah tapped at the door, then entered without waiting to be admitted. Simultaneously the song ball shot past Jax, barely missing his right thigh, and hit the wall behind him with a resounding crack and a loud thrum of the inner resonator sphere. Dejah leapt back a step with a high-pitched squeak.
***
Jax crossed the room and picked up the now slightly dented song ball. The plasticrete wall, supposedly resilient up to a metric ton of pressure, had sustained equal damage.

Star Wars: Coruscant Nights III: Patterns of Force: Chapter 7