Inclusion Criteria:  High frequency hearing loss subjects - Thresholds of 15 dB HL or less for 0.25-2 kHz. Thresholds of 30-60 dB HL from 3-8 kHz. Normal hearing subjects - Thresholds of 15 dB HL or less from 0.5-8 kHz. Thresholds between left and right ears symmetric within 10 dB for all frequencies. Native English speakers.  Exclusion Criteria:  Conductive hearing loss (as assessed by audiologist). Active otologic disease (as assessed by audiologist). Significant cognitive decline (Montreal Cognitive Assessment score > 25).