Final answer:
A sub-auricular bruit refers to an abnormal sound heard over the carotid arteries in the neck.
Step-by-step explanation:
A sub-auricular bruit refers to an abnormal sound heard over the carotid arteries in the neck. It is associated with turbulent blood flow and can be indicative of arterial disease or a blockage in the carotid arteries. A sub-auricular bruit can be detected by auscultation using a stethoscope. The presence of this bruit may warrant further investigation and evaluation by a healthcare professional.