Collapsing ear canals.
D000293:Adolescent; D000328:Adult; D000368:Aged; D001299:Audiometry; D002648:Child; D002675:Child, Preschool; D004424:Ear Canal / Q000473:pathology; D006311:Hearing Disorders / Q000175:diagnosis* / Q000628:therapy; D006801:Humans; D008875:Middle Aged