Only if the characters take it for granted. That's one of the few situations where some good expospeak can make things better. If it's established the FTL trav

Only if the characters take it for granted. That's one of the few situations where some good expospeak can make things better. If it's established the FTL travel is specifically audible in that universe because of some gravitational eardrum-wiggling snenanigans, it would just be a perfectly valid, probably quite interesting mechanic in that universe.