Original Format: Pedagogical Audio CD: Cardiac Auscultation: 3M Littman Stethoscope. 3M Health Care, 3M’s demonstration sound recording for instruction in the use of the stethoscope for cardiac auscultation (heart sounds). With Laennec ‘s invention of the stethoscope we have for the first time in history where a sound object is place between the ears and not external to the body.  One body cavity is mapped to another: heart chamber to cranial cavity. #

0:30 min, Charles Stankievech 18/4/2009

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