Wearable Transcranial Electrical Stimulation (tES) for Insomnia

Inclusion Criteria: * diagnosed with sleep onset insomnia * Self report insomnia diagnosis (ISI score ≥15) * 18-70 years old that are Tricare eligible * No pharmacologic or non-pharmacologic treatment for insomnia in the last 14 days, including over-the-counter medications such as diphenhydramine or cyclobenzaprine not using sedating medications (including over-the-counter) at bedtime in the last 14 days. These can include sedating antihistamines such as diphenhydramine/Benadryl, combination pills such as Tylenol or Advil PM, ZzzQuil. Psychiatric medications such as benzodiazepines (clonazepam/Klonopin, lorazepam/Ativan, diazepam/Valium, alprazolam/Xanax), anti-histamines (hydroxyzine/Atarax/Vistaril), or anti-psychotics (quetiapine/Seroquel). Exclusion Criteria: * Neurologic conditions such as seizures or conditions that increase the risk of seizures, including concussions within the last 3 months; moderate or severe traumatic brain injury; stroke; multiple sclerosis; or cognitive impairment with or without the use of prescription medication or requirement for hospitalization. * Any psychiatric disorder requiring weekly or more frequent clinical monitoring or medication changes in the last 4 weeks. * History of neurodevelopmental disorder such as attention deficit hyperactivity disorder, learning disability, or developmental delay * Any inpatient hospitalization, major surgery, or medical procedure within the past 6 months * Hearing impairments requiring implanted or exte…