Yes way.O_O Google it. It wouldn't be audible from a single vibrating molecule, obviously, but who stated that was the case? Not I. Not all space is empty, it's actually rather full of regions of miscellaneous matter (not exotic particles, by any means, just trace gasses [some not visible to our eyes], which is important in this frame of reference, because the scene appears rather clear). Objects moving through any such region at any velocity, still displace material within the cloud in predictable ways based on velocity, trajectory, temperature, viscosity, density of the cloud, cohesion of the cloud, size of the cloud, shape of the cloud, spape of the moving body, position of the moving body within the cloud, direction the cloud is moving, location of the "observer", etcetera - All of which change the wave pattern and frequency differently, and all affecting the resultant wave frequency delivered to the "observer". All those variables will affect the fact of if or not any sound can be heard by a *human* observer. Black holes for example generate sounds, in the classical deffinition within their accretion bodies, but those sounds are too low frequency for any animal to hear (IIRC ~53-59 Octaves below middle C) It is only due to the virtue of our distance from them that we can see their wave-forms in full; Were we closer, we'd likely need ears larger than Jupiter to hear them or make heads or tales of the pattern.