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The ideal transformer
- scales up pressure and scales down velocity by the same factor
- steps wave impedance from
to
(and vice versa)
without reflections
- conserves power
- No scattering reflections generated
- Physical in principle, but not realizable
There are engineering approximations, however:
- Conical acoustic tube
- Horn loudspeakers
- Quarter-wave microwave transformers
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Download Scattering.pdf
Download Scattering_2up.pdf
Download Scattering_4up.pdf