Not really a big suggestion, but its an alternative in which a public announcement system that plays relevant audios - an example is an audio voiceover of notifying where the escape helicopter is located at during core meltdown. (Subtitles would still appear as an option)
I can’t really think of much use-cases this can work in to be a feasible feature to be added.
Feel free to give some feedback on what else voiceovers can be used for.