On the cover of Phys. Rev. Lett.
LiPhy Grenoble
Platonic bubble vibrations
published on
Underwater spherical bubbles are good acoustic resonators but are notoriously difficult to stabilize. Here, to circumvent these limitations bubbles are trapped within 3D-manufactured millimetric open frames having the shape of the five Platonic solids with identical faces (4 to 20 faces). We thus obtained « Platonic bubbles », stabilized during several days. We measured their acoustic vibration under driving, and we observe that their resonance frequency obeys a simple formula in spite of the shape complexity.