Phase plug for compression driver
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United States of America Patent
Stats
-
Feb 21, 2012
Grant Date -
Dec 10, 2009
app pub date -
Apr 13, 2007
filing date -
Apr 13, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A phase plug comprises a body having an input side for receiving acoustic waves and an output side for transmitting acoustic waves, the body including a plurality of channels extending from the input side to the output side for propagating acoustic waves through the body. The input side comprises an input surface which includes a plurality of openings constituting entrances for the channels, the input surface being substantially part of a sphere or an ellipsoid in shape. The areas of the openings vary with radial position on the input surface, the radial position being measured in a direction extending perpendicularly from a central axis extending through the input surface. The variation in the areas is a function of the cosine of an angle subtended at the centre of the sphere or a focus of the ellipsoid between the central axis and the radial position.
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