Other possible heart sounds include murmurs, which are vibratory sounds ... S1 is the first sound a healthcare provider hears when listening to a person's heartbeat through their chest wall.

EAU CLAIRE, Wis. — Detecting a heart murmur on your own can be tricky. A murmur is an extra heart sound that can be heard by a stethoscope. Sometimes, a murmur sounds like a humming sound ...

University of Cambridge Heart murmurs are a key indicator of heart disease in dogs Researchers started with a database of heart sounds from about 1,000 human patients and developed a machine ...