To answer the question of whether sound can travel in space, we first need to understand what exactly sound is and how it works.
For this, we can take a look at how sound works here on earth. Sound is the result of vibrations that occur within matter, for example, in our vocal cords.
These vibrations create pressure changes within the surrounding air which causes air particles to move around.
This movement creates sound waves and these waves travel through the air.
This means that if you were standing next to a speaker playing music, then you would feel the vibrations from the music traveling through your body.
If you use your vocal cords to produce a sound, the sound waves are picked up by a listener, who will hear them and process in his brain what has been said.