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February 21, 2026American Journal of Physics

Two oscillators in the double-wall bottle

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Authors

DLDaniel LudwigsenAMAlexandria Meade

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Overview

Laboratory activity demonstrates resonance phenomena in double-walled bottles, highlighting experimental data and theory interaction.

Key Points

  • The aim is to explore the resonance frequencies in a double-walled water bottle and how they change with water level.
  • Studied two resonances through striking the bottle and blowing across its neck.
  • Measured frequencies using free audio software.
  • Varied water levels in the bottle to observe frequency shifts.
  • Different tones resulted from the inner and outer walls oscillating.
  • Helmholtz resonance was produced by blowing or striking the bottle.
  • Frequencies shifted oppositely with changes in water level, causing audible beating effects.

Cite This Study

Ludwigsen et al. (2026) studied this question.

synapsesocial.com/papers/69994c80873532290d020fa8https://doi.org/10.1119/5.0304544
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