Theoretically, if you had a weapon powerful enough to cause ripples and vibrations in the space-time continuum itself, then you could get 'sound' to propogate across space, as the vibrations would cascade along space, to any ships nearby. Unfortunately, without gravity-based weaponry, or something analogous, I really don't see this happening on any weapon, short of something on par with a gamma-ray burst, or perhaps larger. It might spontaneously tear holes through space-time and make everything in the region flash to plasma.
The Sathanas' subspace (weapon?) thing at Capella might have done it, but we will never really know.