Vibration testing innovates to ensure space launch reliability Aerospace Testing International Cosmic Sound Comparison What Would Space Sound Like?! Space is silent to human ears but the universe still creates powerful vibrations and signals. The Sun giant So einfach kann ich blind mein iPhone einrichten ohne fremde Hilfe Yes, outer space is completely silent because sound needs a medium, like air, water, or a solid surface, to travel. Sound waves are vibrations that move through particles, but in the vacuum