Sound is caused by vibrations in a medium. Common mediums we experience sound in are air and water. You can hear how the difference in sound mediums affect how you perceive the sound.
Space has no medium for sound to travel it is a near perfect vacuum. There would be nothing to vibrate to produce sound.
Depending on your definition of scream, strong enough microwaves can be heard by an unaided human https://en.wikipedia.org/wiki/Microwave_auditory_effect
Microwaves are electromagnetic radiation. And the effect (hearing) is produced in situ.
That’s not sound (a scream) which is a mechanical wave (relies on atoms and/or molecules to propagate.)
Wouldn’t there also be the question of what is sound? Aren’t there plenty of phenomena that allow us to “hear” something through space. Is it something like the medium is the message?
