title: Change of acoustic reflectivity with age.
authors.forename: J T
authors.initials: JT
authors.lastname: Combs
mesh_terms: D000158:Acoustic Impedance Tests / Q000379:methods; D000293:Adolescent; D000375:Aging / Q000502:physiology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D012022:Reflex, Acoustic / Q000502:physiology*