title: A sound-generating otoscope study--unanswered questions.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001299:Audiometry / Q000295:instrumentation*; D002648:Child; D002675:Child, Preschool; D005069:Evaluation Studies as Topic; D006801:Humans; D008875:Middle Aged