This is the famous torsional wave device. Among the concepts that can be demonstrated are:
- Reflection of waves at the free end
- Constancy of wave speed with amplitude
- Superposition of waves
- Traveling waves absorbed by exponential damper
- Standing waves
- Resonance
- Phase changes upon reflection from fixed and free ends
- Wave reflection at the boundary of two media
- Impedance matching
- Matching transformer
A descriptive booklet is available.