The use of remote microphone hearing aid systems reduced listening stress as measured by salivary cortisol and provided a range of benefits for children with ASD.

Rance, G., Chisari, D., Saunders, K., & Rault, J. L. (2017). Reducing listening-related stress in school-aged children with autism spectrum disorder. Journal of autism and developmental disorders, 47(7), 2010-2022.

https://link.springer.com/article/10.1007/s10803-017-3114-4