| CPC H04R 1/403 (2013.01) | 15 Claims |
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1. A directivity pattern control (DPC) waveguide transducer for a speaker, the DPC waveguide transducer comprising:
a disk body comprising:
a flat-disk portion including a flat surface in a first plane orthogonal to an axis;
a waveguide portion including a horn surface contiguous with the flat surface, the horn surface being contoured from a throat formed at a center of the waveguide portion to a mouth, the waveguide portion, at a plurality of planes orthogonal to the axis, includes respective cross-sections of the horn surface being substantially oval;
a first tweeter aperture at least substantially formed by the flat-disk portion; and
a second tweeter aperture at least substantially formed by the flat-disk portion,
the first tweeter aperture, the second tweeter aperture, and the throat being in a linear arrangement along a diameter of the disk body, the throat being in a second plane orthogonal to the axis, and the first tweeter aperture and the second tweeter aperture being at least substantially in the first plane, the second plane offset from the first plane along the axis;
a full-range tweeter secured to the disk body substantially adjacent to the throat, the full-range tweeter to propagate sound at a full range of tweeter frequencies from the full-range tweeter through the throat, the waveguide portion, and the mouth, the full range of tweeter frequencies to be controlled in vertical and horizontal directivities based on the horn surface thereby limiting early reflections from two external surfaces from the DPC waveguide and reducing distortion;
a first mid-tweeter secured to the disk body and substantially adjacent to the first tweeter aperture, the first mid-tweeter to propagate sound at a midrange of tweeter frequencies from the first mid-tweeter toward the first tweeter aperture and not at least substantially controlled by the waveguide portion; and
a second mid-tweeter secured to the disk body and substantially adjacent to the second tweeter aperture, the second mid-tweeter to propagate sound at the midrange of tweeter frequencies from the second mid-tweeter toward the second tweeter aperture and not at least substantially controlled by the waveguide portion,
the first mid-tweeter and the second mid-tweeter to support additional power handling to the full-range tweeter thereby increasing sensitivity and reducing compression for the DPC waveguide transducer, and
the first mid-tweeter and the second mid-tweeter being offset from the full-range tweeter, via the first tweeter aperture, the second tweeter aperture, and the throat, respectively, to allow for time alignment and further beamforming of the DPC waveguide transducer thereby increasing beamforming sensitivity.
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