Ernst Chladni. Portrait of Ernst Florens Friedrich Chladni (1756-1827), German physicist and acoustics pioneer. He measured the speed of sound by fill

---

Ernst Chladni. Portrait of Ernst Florens Friedrich Chladni (1756-1827), German physicist and acoustics pioneer. He measured the speed of sound by filling organ pipes with different gases and noting the change in pitch. He used a violin bow to vibrate sheets of metal which were clamped in the middle then covered in sand. The sand formed a variety of different symmetrical patterns. These Chladni figures were due to the sand collecting in areas where the plate did not vibrate (nodes); these patterns allowed waveforms to be studied. Chladni also invented two musical instruments, the euphonium and clavicylinder.

---

Size: 2160px × 3234px
Photo credit: © Science Photo Library / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: acoustics, chladni, clavicylinder, ernst, euphonium, florens, inventor, pattern, physicist, pioneer, portraits, surname, wave