Produces The Lub Dub Heart Sounds ((new)): What

When they snap shut, they create a higher-pitched, crisper snap than the "Lub." This is the

But the truth is far stranger and more fascinating. The "Lub-Dub" isn't the sound of muscle flexing. It’s not blood rushing through pipes. And it’s definitely not the heart "pumping." what produces the lub dub heart sounds

And the tiny gap between the Lub and the Dub? That’s —the actual pumping phase. But again, pumping is silent. So the only reason we hear two distinct noises is because we are listening to the boundaries of the pump: the valves slamming at the start and the valves snapping at the finish. Part 5: The Party Trick (Breathing and Splitting) Here’s where it gets weird enough to impress your friends. If you listen to a child’s heart with a stethoscope and tell them to take a deep breath, the "Dub" suddenly turns into "Du-ub." It splits into two distinct sounds. When they snap shut, they create a higher-pitched,