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Resonance frequencies of Helmholtz resonators with Cobra4 Xpert-Link

Resonance frequencies of Helmholtz resonators with Cobra4 Xpert-Link

Item no.: P2150864

Measurement Type: with a computer, Mobile (Datalogging)
Experiment Type: Teacher Experiment, Laboratory Experiment

Difficulty Expenditure of Time print
  • Description
  • Scope of Supply
  • Downloads and Documents


Acoustic cavity resonators possess a characteristic frequency which is determined by their geometrical form. In this case the resonator is excited to vibrations in its resonance frequency by background noise.


  • Measure the resonance frequencies without additional excitation by using only the ambient noise
  • Immediate observation of both, the sound wave signal and the resonance frequencies using FFT
  • Measure live while changing the body volume and thus the resonance frequency
  • Simplified implementation: all pre-settings already prepared


Determination of different resonance frequencies of a resonator depending on the volume.

What you can learn about

  • Cavity resonator
  • Resonance frequency
  • Acoustic resonant circuit

Operating system-independent software included. Computer not provided.


Document     Filesize
p2150864e.pdf Experiment guide, English 793.67 KB

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