Inclusion Criteria:  Adults, minimum age of 18 Native English speakers Ability to complete questionnaires and laboratory assessments Symmetric, mild to moderately-severe sensorineural hearing loss Informed consent completed with signature  Exclusion Criteria:  Inability to visit the Starkey Headquarters building for testing Central or middle ear hearing problems Medical contraindications to wearing hearing aids Learning disability, major cognitive handicap, or serious neurological or psychiatric disease that would prevent or restrict participation, as determined by the PI or designee