Resonance frequencies of Helmholtz resonators with Cobra4 Xpert-Link
Principle
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.
Benefits
- 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
Measuring tape, l = 2 m
Long-neck round-bott.flask 100ml
Long-neck round-bott.flask 1000ml
Universal clamp
Glass tube,diam 12mm l 300 mm
Tripod base PHYWE
Support rod, stainless steel, 500 mm
Boss head
Striking hammer
Measuring microphone with amplifier
Connecting cord, 32 A, 500 mm, red
Connecting cord, 32 A, 500 mm, blue
Flat cell battery, 9 V
Cobra4 Xpert-Link
Tasks
Determination of different resonance frequencies of a resonator depending on the volume.
What you can learn about
- Cavity resonator
- Resonance frequency
- Acoustic resonant circuit