The dead silence of space, where no sound can travel.

Sound traveled well, and she could hear him clearly as he came back into the kitchen.

The sound of our conversation would have traveled back to her.

Sound cannot travel through a vacuum, which is a space without any air or matter.

"The sound of a gun would travel too far," he said.

The sound of the fall had traveled along the shaft.

So while the sound would travel extremely quickly, it just wouldn't be very loud?

The sound would not travel in the absence of a carrier.

Sound traveled far in the cool night air of the desert.

Though the people who work there are not on the premises after hours, any sound we make might travel through the walls.