Benefits of Assistive Listening Device for Speech Intelligibility

Inclusion Criteria: * adults age 18 or older with bilateral moderate to moderate severe sensorineural hearing loss, pure tone average must be between 40 and 69 dB HL (decibel Hearing Level) * experienced hearing aid users * symmetric hearing loss (no more than 15 dB difference between the ears at three contiguous frequencies) * good written and spoken English language skills * healthy outer ear as confirmed by otoscopy Exclusion Criteria: * contradictions to medical device noted upon otoscopy * known hypersensitivity or allergy to materials of investigational device or comparator * inability to produce reliable test results * known psychological problems * self reported symptoms of dizziness or vertigo