My hearing is fairly robust for a man of my age. I also pride myself on my ability to concentrate. Yet despite the benefits of both those attributes, I still often find myself struggling to keep up with the dialogue and plot of many a game, TV show or movie. It’s something that is not unique to me and seems to be part of a growing phenomenon. Take last year’s science fiction blockbuster Interstellar. Amongst the critical praise there was a lot of grumbling over the mixing of ambient sound effects and the movies score drowning out dialogue. Similar complaints have been levelled at a lot of contemporary TV shows.