Fluted and elongated aperture for acoustic transducer
First Claim
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1. A loudspeaker comprising:
- an electromagnetic transducer including a diaphragm configured to generate acoustic vibrations;
an aperture positioned in front of the diaphragm in a direction of propagation of the acoustic vibrations, the aperture including an opening having one or more protrusions forming an opening shape having non-uniform edges, the aperture further comprising fluting, the fluting being smoothly curved without sharp corners; and
a high frequency horn positioned above the diaphragm and configured to emit high frequency waves that do not pass through the opening;
wherein a directivity of the electromagnetic transducer matches a directivity of the high frequency horn in a crossover region.
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Abstract
Embodiments are disclosed for a loudspeaker for producing directed acoustic vibrations. In some embodiments, a loudspeaker includes an electromagnetic transducer including diaphragm configured to generate acoustic vibrations. The loudspeaker may further include an aperture positioned in front of the diaphragm in a direction of propagation of the acoustic vibrations, the aperture including an opening having one or more protrusions forming an opening shape having non-uniform edges.
11 Citations
20 Claims
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1. A loudspeaker comprising:
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an electromagnetic transducer including a diaphragm configured to generate acoustic vibrations; an aperture positioned in front of the diaphragm in a direction of propagation of the acoustic vibrations, the aperture including an opening having one or more protrusions forming an opening shape having non-uniform edges, the aperture further comprising fluting, the fluting being smoothly curved without sharp corners; and a high frequency horn positioned above the diaphragm and configured to emit high frequency waves that do not pass through the opening; wherein a directivity of the electromagnetic transducer matches a directivity of the high frequency horn in a crossover region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A loudspeaker comprising:
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an electromagnetic transducer including a diaphragm configured to generate acoustic vibrations; an aperture positioned in front of the diaphragm in a direction of propagation of the acoustic vibrations, the aperture including a single opening that is symmetric about two perpendicular axes, the opening including one or more protrusions extending from a center of the opening, where the opening is longer along a first perpendicular axis of the two perpendicular axes than along a second perpendicular axis of the two perpendicular axes; and a high frequency horn spaced away from the diaphragm and the opening, the high frequency horn being centered on the first perpendicular axis; wherein the aperture comprises a first region and a second region, the first region being planar and adjacent to an outside edge of the aperture, the second region curving smoothly toward the diaphragm as the aperture is traversed from the outside edge toward the opening, the second region located adjacent to the opening. - View Dependent Claims (15, 16, 17, 18)
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19. A loudspeaker comprising:
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an electromagnetic transducer including a diaphragm configured to generate acoustic vibrations; an aperture positioned in front of the diaphragm in a direction of propagation of the acoustic vibrations, the aperture including a single opening that is symmetric about two perpendicular axes, the opening including six protrusions extending from a center of the opening, three of the six protrusions positioned on each side of a horizontal axis through the center of the opening, and a first and a second central protrusion of the six protrusions positioned along a vertical axis through the center of the opening, where an apex of each of the first and second central protrusions coincides with the vertical axis; and a high frequency horn positioned above the diaphragm and configured to emit high frequency waves that do not pass through the opening, the high frequency horn oriented such that a long axis of the high frequency horn is perpendicular to a long axis of the opening along a front side of the loudspeaker; wherein the aperture further comprises six fluting pieces located between the six protrusions, the fluting pieces curving smoothly toward the diaphragm as the aperture is traversed from an outer edge of the aperture to the opening. - View Dependent Claims (20)
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Specification