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Yes this. Because when the adhd brain has something to listen to the sound can help drown out our racing thoughts that often lead to massive distraction
How do you know? >

This was my first question. How many people has OP interviewed to hold this opinion? >

There’s been multiple studies done on it already. >

Even if true, which it isn't.... still better than not doing either. >

It is true actually. There’s been studies on this. People that only listen to something are less likely to remember it. >

I'd like to see the studies on that.... >

Then google it. >

Sorry I didn't catch that, could you speak into my ear instead? >

I do. But I can only speak as someone with ADHD. When I read, my mind can still drift. It's hard to explain, but I'm reading the words, but my mind is elsewhere and not absorbing the info. I have to read the same passage a few times. 
Somehow, listening to the info and doing something else with my hands helps.