My mother is a pretty deep thinker and she requires constant TV chatter simply because she has tinnitus and can't stand the sound of it. But I think she's an exception.
Have you introduced her to brown noise? I typically use it for blocking out background sounds when I'm tired of listening to music, but it might work well for tinnitus too.
I have tinnitus and needs background noise - but to be non interuptive it has to be background - a coffee bar, or the telly on low - what it can't require is any processing like music or something that is designed to be 'listened to'.
