A follow-up study of the CROS hearing aid.
D000328:Adult; D000368:Aged; D005069:Evaluation Studies as Topic; D005139:Eyeglasses; D005500:Follow-Up Studies; D006310:Hearing Aids / Q000592:standards*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009622:Noise; D014481:United States; D014493:United States Department of Veterans Affairs