Can silence exist in a vacuum?

Answer 1

Sound waves require a medium to travel through (i.e. air, water, ect.). In a vacuum no such medium exists so there can be no sound waves. So the answer is, yes, silence can and does exist in a vacuum.

Answer 2

In a vacuum where there is no air or matter to transmit sound waves, traditional forms of sound as we perceive them would not exist. However, silence can be understood as the absence of auditory stimuli, so the concept of silence could still apply in a vacuum.