Question

sound cannot travel through ____​

Answer 1

Answer:

Sound waves are travelling vibrations of particles in media such as air, water or metal. So it stands to reason that they cannot travel through empty space, where there are no atoms or molecules to vibrate.

Answer 2

Answer:

Sound waves cannot travel through no medium. That is, sound waves cannot travel through a region of space void of matter - a vacuum. In the absence of particles, sound waves no longer exist.