[A new method of investigation--narrow-band phonocardiography and the results of amplitude-frequency analysis of the heart sounds of healthy persons].
D000328:Adult; D006801:Humans; D008722:Methods; D010701:Phonocardiography
Novyĭ metod issledovaniia--uzkopolosnaia spektral'naia fonokardiografiia i rezul'taty amplitudno-chastotnogo analiza serdechnykh tonov zdorovykh liudeĭ.