(Strip Number 6027, Original Publication Date, 24 September 1985)
Panel 1: Elly's immediate response to the end of yesterday's strip is to ask Mike how he could possibly concentrate with that music booming in his ears.
Panel 2: She then does the pious closed-eyes thing as she tells him to take off the headset and concentrate on what he's doing.
Panel 3: She then sort of makes it impossible to concentrate by ranting about how when she was ten, they only had one radio and weren't allowed to listen to it until after dinner and homework.
Panel 4: As she rants about how entitled and spoiled Mike is and how he doesn't care about his studies, Michael thought-bubbles that if it isn't one thing booming in his ears, it's another.
Summary: Not only do we get the stupid, passive-aggressive bitchery about how evil conflict-causing single people invented headsets to allow children to tune out their parents, we also run right into Elly not knowing what she's talking about. There are any number of studies that show that children concentrate better when there's some background noise to block out distractions like a yapping idiot parent who couldn't pass the opening exams to her daughter Lizzie's kindergarten and the unearthly silence that said imbecile woman insists on.