Stethoscope Dual head stethoscope for adult is an Acoustic Stethoscope used to hear sounds made by the hearts, lungs and intestines. It has a typically small disc shaped resonator that is placed against the chest and two tubes connection. It is often used to listen to lung and hearts sounds. Stethoscope composed of a diaphragm and a bell are called dual head stethoscope. Head over to listen alternately to low and high frequency sounds. It has dual side diaphragm or a diaphragm and bell. Dual head stethoscope listen to different and specific sound range.