Abbiamo rotto un bicchiere con la voce. Come? Spieghiamo la fisica del suono

We did it: we broke a glass with our voice, applying DeNa's knowledge of sound physics. But what exactly happens when we shout loudly at a crystal glass, and why does it only sometimes actually break? In this video, we perform the experiment and explain how it's possible to do so using just our voice. It's actually all about vibrations. Specifically, if we emit a sufficiently loud sound with the same resonant frequency as the glass, we can make it vibrate to the breaking point. To help you understand how we managed to shatter the glass, we'll explain in detail how sound propagates through the air and, from an anatomical perspective, how the ear transforms sound waves into an acoustic signal for the brain. Credit: Animations for Physics and Astronomy Wang-W_-Chen-D_-Chen-S_-Li-D_-Li-M_-Xia-S_-Zheng-H Trevor_Cox    / trevorcox   Animagraffs Pavel-Ševela 00:00 How to break a crystal glass with your voice 00:23 What to do to succeed? Identify the resonant frequency and use your voice with the right intensity 00:55 The moment the glass shatters 01:09 Why can you break a glass with your voice? Let's start with the sound 01:49 The propagation of sound waves from our vocal cords 02:28 What happens to the glass when we scream? Vibrations 03:50 How does our ear perceive sounds? 04:52 The role of stereocilia 05:40 Different hair cells detect different sounds OUR EXPERIMENTS:    • L'uovo che rimbalza!   OTHER RECOMMENDED VIDEOS:    • La spiegazione fisica della punizione di R...      • La fisica della batteria in slow motion e ...   #experiment #physics #geopop