a combined electronic acoustical stethoscope having a compact conventional appearance is disclosed . the stethoscope includes a head assembly rotatably mounted on a spool and containing at least a diaphragm , a bell , a battery holder , a microphone , a speaker , signal processing means and , a programmable switch integrated with the spool . the microphone , speaker , signal processing means and programmable switch are concealed within the head assembly thereby providing the stethoscope with the compact conventional appearance .