Interesting proof-of-concept research. The article you posted appears to be specifically about the use of visual/auditory white noise for learners with reading disabilities but not necessarily ADHD (subclinical in the study population). They also have earlier research that focused on ADHD and EF:

Baijot, S., Slama, H., Söderlund, G. et al. Neuropsychological and neurophysiological benefits from white noise in children with and without ADHD. Behav Brain Funct 12, 11 (2016). https://doi.org/10.1186/s12993-016-0095-y

I think I need to go read up on stochastic resonance.

...pronounced like the long vowel and first letter of the alphabet...