It is a well known fact that due to space being a vacuum, sound as we know it, can not travel. That does not mean though that sound doesn’t exist.
The universe is filled with electromagnetic waves which vibrate in the same frequency range as human hearing.
NASA used special instruments on board of Voyager and other probes, to record these electromagnetic vibrations. They then converted them to sounds which we can hear. The results are both beautiful and frightening at the same time.
Take a listen.