I have just
got a new TV (well new for me) after having the same TV for 18 years. The new TV has this new fangled stereo business and plenty of options for how this should sound.
Invariably, the adverts are noisier, although I notice some programme titles are far noisier, especially the "sponsored by" bits, which are often deafening compared to the programmes themselves.
Less than fascinatingly, fictional fan of cleaning products, Cillit Bang's own shouty evangelist Barry Scott, is fairly quiet in comparison to a lot of other ads. Perhaps when I was watching my old TV, I imagined his slightly weak bellowing was louder than it actually is. Anyway, it just goes to show.