  This paper provides an overview of hearing loss effects on neurological
function and progressive diseases; and explores the role of cognitive load
monitoring to detect dementia. It also investigates the prospects of utilizing
hearing aid technology to reverse cognitive decline and delay the onset of
dementia, for the old age population. The interrelation between hearing loss,
cognitive load and dementia is discussed. Future considerations for improvement
with respect to robust diagnosis, user centricity, device accuracy and privacy
for wider clinical practice is also explored. The review concludes by
discussing the future scope and potential of designing practical wearable
microwave technologies and evaluating their use in smart care homes setting.
