title: Spectral analysis of second heart sound in normal children by selective linear prediction coding.
mesh_terms: D000293:Adolescent; D001021:Aortic Valve / Q000033:anatomy & histology; D002648:Child; D002675:Child, Preschool; D004452:Echocardiography; D006326:Heart Auscultation / Q000379:methods; D006347:Heart Sounds / Q000379:methods; D006801:Humans