Helmholtz Resonators
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Explore audio resonance; these Helmholtz resonators resonate at specific audio frequencies.
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Updated at source:
Model information
- Source
- Printables
- Category
- Physics & Astronomy
- License
- Creative Commons — Public Domain
Recently I ran across an article about Helmholtz Resonators and I just had to explore a bit further. The great thing about 3D printing is that I was quickly able to design and print a couple of models to try them out for myself.
The prints included here show an estimated resonance frequency based upon this calculator :
An online tone generator made it possible to cycle through a range of audio frequencies and experience the resonance first hand :
It is interesting to operate the tone generator while not looking at the screen, in order to detect the resonant frequency purely by listening - you will see just how close to the predicted resonant frequency the models actually are. The two models shown here have [calculated] resonant frequencies of 1100Hz and 2500Hz - these frequencies should be easily reproduced by most audio systems.
Note : The small end that fits into the ear has edges that may be a bit sharp; I “softened” the edges with a little bit of sanding.
Print Instructions
Print in PLA using the 3mf file provided; otherwise :
- 0.3mm layer height
- brim
- 0% infill
- 2 perimeters
CAD
The OnShape 3D CAD files for this are here :