I have no TV but I can sympathise due to the ever-increasing use by BBC R4 to add tinkly-squeak "music" or supposedly-relevant sound-effects to speech programmes.
Usually the background aural clutter is quieter than the oral text, but still neeeless, intrusive and distracting. I have though heard instances where it made the speech hard to follow, especially if in a strong British or foreign accent.
This complaint has been aired quite often on Feedback but anyone deigning to be " available for comment " or even just "sending a statement", is usually some media-studies type who cannot understand why we don't want it, and just fobs us off with pseudo-intellectual excuses.
'
(Tee-hee… just had a wonderful thought of one of said media studies types being a regular on here… and hiding his or her guilty blushes by being " unavailable for comment" .)
'
Regarding British accents, I think to be fair the BBC Drama Department has largely moved on from its days of stereotyping by vaguely-regional accent to tell you if the character was the seaman or farmer (Ooh arrgh), military-officer (splendid chaps, wot), army other-ranks or copper (Lunnon, guv), or the factory worker (By 'eck lad), etc.