title: [Echo thresholds measured in the vertical and horizontal planes].
authors.forename: M Iu
authors.initials: MIu
authors.lastname: Agaeva
authors.forename: Ia A
authors.initials: IaA
authors.lastname: Al'tman
mesh_terms: D000328:Adult; D001307:Auditory Perception / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D013028:Space Perception / Q000502:physiology*