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US 7,095,868 B2Granted
Phase plug with optimum aperture shapes
OwnerEarl Geddesinventor
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Abstract
A phase plug for optimally matching a drive-unit's diaphragm to the throat of a waveguide is disclosed. Specific embodiments of a circular diaphragm matched to an elliptical waveguide and a circular diaphragm to a rectangular waveguide are disclosed.
Claims6
An electro-acoustic transducer for transmitting sound comprising:
- a drive-unit;
- a waveguide and;
- a phase plug with a diaphragm end and an exit aperture, wherein:
- said phase plug has sound path equalizing channels whose shapes normal to the wave propagation change from being multiple concentric annuluses at the diaphragm end, to being noncircular concentric at the exit aperture.
1 more element
Dependencies are inferred from the claim text.