Manku Poru

Manku Poru is a hands-on acoustics lab for exploring Chladni figures — the standing-wave patterns that form when fine sand gathers along the still nodal lines of a vibrating plate. Choose a circular or square plate, set its edge to free 🆓 or clamped, then turn the frequency dial and watch 👀 a live field of simulated grains migrate in real time ⏱️ onto the plate's actual computed nodal lines. Every figure you see 👀 is produced by a genuine on-device 📱 physics model. The app resolves the nearest resonant eigenmode for your driving frequency, evaluates the plate's displacement field, and runs a seeded sand simulation whose grains drift toward the zero-amplitude regions — so sweeping the frequency snaps the pattern 🔢 between real resonant modes. The mode number and the nodal-line count are computed from the field, never faked. Key features: • A live circular or square Chladni plate with a sand particle-field and a rotary frequency dial • SWEEP mode to automatically scan the spectrum and find resonances • A Modes atlas — a resonance spectrum chart 📊 plus a catalog of computed modes you can tap 👆 to load into the lab • Capture and name the figures you discover ✨; your gallery 🖼️ of resonant patterns is saved on the device 📱 and re-rendered exactly from its parameters • Attach a reference photo 📸, taken with your camera 📷 or picked from your photo library 📚, to a captured figure so you can compare ⚖️ a real plate against the computed prediction • Adjustable grain count, default plate shape and boundary, haptics, and a nodal-line overlay • A one-tap 👆 option to reset and erase all of your saved data The simulation and every pattern 🔢 you capture run and stay on your device 📱, and there are no accounts and no ads. Manku Poru checks your connection when it starts and shows a retry screen if you are offline 📴, and it opens its Privacy Policy and Terms in an in-app web view. Whether you are a student, a teacher, or simply curious about the physics of sound, Manku Poru turns resonance into something you can see 👀, tune, and explore.