title: [Frequency-amplitude characteristics of heart tones in healthy persons of various ages].
mesh_terms: D000293:Adolescent; D000328:Adult; D000375:Aging; D001011:Aorta / Q000502:physiology; D002648:Child; D006321:Heart / Q000502:physiology*; D006326:Heart Auscultation; D006334:Heart Function Tests; D006801:Humans; D008722:Methods; D008875:Middle Aged; D011651:Pulmonary Artery / Q000502:physiology
vernacular_title: O chastotne-amplitudnykh kharakteristikakh tonov serdtsa zdorovykh liudeĭ razlichnogo vozrasta.