Additional Study Information: Early Age-Related Hearing Loss Investigation (EARHLI) is a study to obtain information on how a hearing aid-based intervention can prevent cognitive decline in those at risk for Alzheimer's Disease and Alzheimer's Disease Related Dementias (AD/ADRD). Age-related hearing loss (ARHL) is the third most common chronic condition in older adults. The way Age-related hearing loss (ARHL) and Alzheimer's Disease and Alzheimer's Disease Related Dementias (AD/ADRD) are linked are unknown but reduced social engagement and changes in brain organization/connectivity have been proposed. This study will focus on early Age-related hearing loss (ARHL) in middle and early older age, a critical time for the development of Alzheimer's Disease and Alzheimer's Disease Related Dementias (AD/ADRD) and an ideal time to intervene. Medical experts have proposed that eliminating Age-related hearing loss (ARHL) would be associated with an 8% reduction in new dementia cases. Yet, 90% of our target population is not treated with hearing aids and there is a lack of studies testing the efficacy of hearing aids in Age-related hearing loss (ARHL). Moreover, while studies have suggested that hearing aids improve cognition, social engagement, and brain organization/connectivity there is still no concrete evidence. The goal of this study is to address these knowledge gaps.