It leaned much more towards fantasy rather than “science” fiction. The roar of space ships and weapons in outer space was a clue. To enjoy it you had to do some serious suspension of belief so then zipping around the far far away galaxy was a breeze.
One reason I liked the new Battlestar Galactica series. They paid attention to the details. As did the latest Expanse series. Unless you are on a spaceship...it makes no noise.
It always amazed (irritated) me that in Star Trek TNG, the exterior shots of the Enterprise were accompanied by a low frequency "rumble" noise. Where did that come from? Same question for the exterior the visual. Where, in interstellar space, does the light come from that illuminates Enterprise soooo beautifully.
As for Battlestar Galactica, as a radiohead, I loved the sound of their ship-to-ship comms. Clearly identifiable as sideband communications...those that send triple the power with no carrier wave...where audio needs to be "clarified" or tuned to be understandable. Nice touch.