Final answer:
Auscultation, performed using a stethoscope, is the exam technique for listening to internal body sounds like the heart and lungs, and can help diagnose various conditions.
Step-by-step explanation:
The exam technique by which a practitioner listens to internal body signs is known as auscultation. This traditional yet crucial diagnostic method entails using a stethoscope to listen to the sounds made by the heart, lungs, and other organs. Auscultation is a core component of a physical examination and can reveal valuable information about the patient's cardiovascular and respiratory health. Abnormal heart sounds could indicate valve or septal disorders, which might require further investigation with an echocardiogram.
Auscultation has been practiced since ancient times and remains a proven, safe, and inexpensive diagnostic tool compared to more invasive procedures.