Casgliadau Arlein

Acoustic stethoscope with brown rubber tubes and two silver metal air filled tubes attached at the top to be placed in the doctor's ears. Stethoscope has a metal 'bell' piece on the bottom to be placed on the patient to detect sound.(see below for info)

Acoustic stethoscopes operate on the transmission of sound from the chest piece, via air-filled hollow tubes, to the listener's ears. The chestpiece usually consists of two sides that can be placed against the patient for sensing sound — a diaphragm (plastic disc) or bell (hollow cup). If the diaphragm is placed on the patient, body sounds vibrate the diaphragm, creating acoustic pressure waves which travel up the tubing to the listener's ears. If the bell is placed on the patient, the vibrations of the skin directly produce acoustic pressure waves traveling up to the listener's ears. The bell transmits low frequency sounds, while the diaphragm transmits higher frequency sounds.