A Stethoscope is a medical instrument used in listening to sounds produced within the body, majorly in the heart or lungs. It has two flexible rubber tubes attached to the chest piece and spring-connected metal tubes with earpieces. In listening to heart sounds, in particular, it is necessary to use both a bell-shaped, open-ended chest piece, which transmits low-pitched sounds well, and the flat chest piece covered with a semirigid disk (diaphragm type) that detects sounds of higher frequency.
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