Inclusion Criteria:  Adult participants (aged 65 - 85 years inclusive) diagnosed with mild, late onset Alzheimer's disease (AD). Participants must be fully vaccinated against COVID-19. Participants must be willing and able to comply with all study requirements. Participants and investigators must expect that the participant will be able to remain on a stable regimen used for the management of AD. Participant must have a study partner that is willing to participate in the trial. The study partner must be someone that sees the subject for more than three hours a day, 5x per week) that is fully vaccinated against COVID-19.  Exclusion Criteria:  Has experienced a heart attack, angina, or stroke within the past 12 months. Are being treated with another neurostimulation device. Experience frequent falls (defined by 2 or more falls in the past month). Works night shifts. Have unresolved complications from a previous surgical procedure at the baseline visit, such as swelling or persistent pain, that requires medical intervention. Have active ear infections, perforated tympanic membrane or labyrinthitis, as identified by a general ear examination performed by medically qualified Investigators. Have a recent history of frequent ear infections (≥ 1 per year over the past two years). Have a cochlear implant or hearing aids that cannot be easily/reliably removed for treatment. Have chronic (>3 months) tinnitus. Have previously been diagnosed with traumatic brain injury with ongoing sequela. History of medication-refractory depression or bipolar disorder in the past three years. History of schizophrenia.