[InitialLastName]

This might just be the mix (and there might be second-order effects such as the mix changing as the mix engineers and producers get younger), but your ability to differentiate voices from background sound also depreciates as you age. The music can be substantially quieter than the background and still cause issues for people with age-related hearing loss (which is roughly universal), especially as they start to lose the higher harmonics that help us distinguish vocal sounds.