It's wild. I have children, and I spent a great time researching foods, bottles, toys, etc., but I would've never thought much about doubting the (big brand) consumer electronics that we all use every day.
The article specifically calls out pthalates and bisphenols (both common in plastics), but there's absolutely no reason to believe -- unless you're regularly eating your headphones -- that this is a problem.
Bunnies everywhere put on notice.
Let me just save you the effort of further rounds of responses here: if you chew on plastic, you will be exposed to the chemicals in plastic. If you’re truly worried about this, don’t buy plastic items.
But this should be considered when we make blanket claims about it’s okay because we’re just touching them, not eating them. We have to think about how people actually behave, not ideal usage.
By the way, headphones are required in elementary school here and are used at least an hour a day.