Related Experiment Video
Updated: May 15, 2026

Towards Biomimicking Wood: Fabricated Free-standing Films of Nanocellulose, Lignin, and a Synthetic Polycation
Published on: June 17, 2014
Sustainable sonic crystal made of resonating bamboo rods
C Lagarrigue1, J P Groby, V Tournat
1LUNAM Université, Université du Maine, CNRS Unité Mixte de Recherche 6613, LAUM, Av. O. Messiaen, 72085 Le Mans Cedex 9, France. clement.lagarrigue.etu@univ-lemans.fr
Abstract:
The acoustic transmission coefficient of a resonant sonic crystal made of hollow bamboo rods is studied experimentally and theoretically. The plane wave expansion and multiple scattering theory (MST) are used to predict the bandgap in transmission coefficient of a non-resonant sonic crystal composed of rods without holes. The predicted results are validated against experimental data for the acoustic transmission coefficient. It is shown that a sonic crystal made from a natural material with some irregularities can exhibit a clear transmission bandgap. Then, the hollow bamboo rods are drilled between each node to create an array of Helmholtz resonators. It is shown that the presence of Helmholtz resonators leads to an additional bandgap in the low-frequency part of the transmission coefficient. The MST is modified in order to account for the resonance effect of the holes in the drilled bamboo rods. This resonant multiple scattering theory is validated experimentally and could be further used for the description and optimization of more complex resonant sonic crystals.
Related Concept Videos
Sound Waves: Resonance
Standing Waves
Crystal Density
Resonance and Hybrid Structures
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.
Characteristics of Series Resonant Circuit
Resonance in an AC Circuit

