Claims
- 1. An electro-dynamic loudspeaker comprising:
a frame; a plurality of magnets mounted to the frame; a diaphragm mounted to the frame; and means for affecting the directivity of the loudspeaker by amplitude shading of the diaphragm.
- 2. The electro-dynamic loudspeaker of claim 1, where the means for affecting the directivity of the loudspeaker by amplitude shading of the diaphragm comprises varying the density of the magnetic flux of the magnets along the length of the diaphragm.
- 3. The electro-dynamic loudspeaker of claim 1 where the diaphragm has conductive traces affixed to the diaphragm and where the means for affecting the directivity of the loudspeaker by amplitude shading of the diaphragm comprises varying the DC resistance of the traces along the length of the diaphragm.
- 4. The electro-dynamic loudspeaker of claim 1 where the means for affecting the directivity of the loudspeaker by amplitude shading of the diaphragm comprises varying the mass of the diaphragm along the length of the diaphragm.
- 5. An electro-dynamic loudspeaker comprising:
a frame having a plurality of magnets mounted to the frame; and a diaphragm mounted to the frame in a spaced relationship to each of the plurality of magnets, the plurality of magnets comprises at least one magnet mounted to the frame and spaced a first distance from the diaphragm and at least one magnet mounted to the frame and spaced a second distance from the diaphragm.
- 6. The electro-dynamic loudspeaker of claim 5 where the first distance is between about 0.1 mm to about 1 mm.
- 7. The electro-dynamic loudspeaker of claim 5 where the second distance is between about 0.2 mm to about 1.1 mm.
- 8. The electro-dynamic loudspeaker of claim 5 where at least one magnet is mounted to the frame and spaced a third distance from the diaphragm.
- 9. The electro-dynamic loudspeaker of claim 8 where the first distance is between about 0.1 mm and 1 mm, the second distance is between about 0.2 mm and 1.1 mm and the third distance is between about 0.3 mm and 1.2 mm.
- 10. An electro-dynamic loudspeaker comprising:
a frame; a plurality of magnets mounted to the frame; and a diaphragm mounted to the frame in a spaced relationship to the plurality of magnets, the plurality of magnets comprises at least one magnet generating a first magnetic flux and at least one magnet generating a second magnetic flux.
- 11. The electro-dynamic loudspeaker of claim 10 where the diaphragm has a plurality of conductive traces affixed to the diaphragm at a distance from the plurality of magnets and the first flux and the second flux are measured at the location of the traces.
- 12. The electro-dynamic loudspeaker of claim 10 where the first flux is between about 0.025 T and about 0.5 T.
- 13. The electro-dynamic loudspeaker of claim 10 where the second flux is between about 0.05 T and about 0.75 T.
- 14. The electro-dynamic loudspeaker of claim 10 further comprising at least one magnet generating a third flux.
- 15. The electro-dynamic loudspeaker of claim 14 where the first flux is between about 0.025 T and about 0.5 T, the second flux is between about 0.05 T and about 0.75 T, and the third flux is between about 0.075 T and about 1 T.
- 16. The electro-dynamic loudspeaker of claim 10 where at least one of the plurality of magnets is energized to a first energy density and at least one of the plurality of magnets is energized to a second energy density.
- 17. The electro-dynamic loudspeaker of claim 16 where the first energy density is between about 20 MGOe and about 40 MGOe.
- 18. The electro-dynamic loudspeaker of claim 16 where the second energy density is between about 25 MGOe and about 45 MGOe.
- 19. The electro-dynamic loudspeaker of claim 16 where at least one of the plurality of magnets is energized to a third energy density.
- 20. The electro-dynamic loudspeaker of claim 19 where the first energy density is between about 20 MGOe and about 40 MGOe, the second energy density is between about 25 MGOe and about 45 MGOe, and the third energy density is between about 30 MGOe and about 50 MGOe.
- 21. An electro-dynamic loudspeaker comprising:
a frame; a plurality of magnets mounted to the frame; a diaphragm mounted to the frame, the diaphragm comprising a thin film having a conductor affixed to the film, the conductor comprises a plurality of electrical circuits.
- 22. The electro-dynamic loudspeaker of claim 21 where the plurality of circuits are electrically connected in series.
- 23. The electro-dynamic loudspeaker of claim 21 where the plurality of circuits are electrically connected in parallel.
- 24. The electro-dynamic loudspeaker of claim 21 where:
the diaphragm has a driven portion; and the plurality of circuits are located in the separate zones of the driven portion.
- 25. The electro-dynamic loudspeaker of claim 21 where the plurality of circuits conductive traces, and the traces for at least two of the plurality of circuits have different cross-sectional areas.
- 26. The electro-dynamic loudspeaker of claim 21 where the plurality of circuits each comprise conductive traces and the traces for at least two of the plurality of circuits are comprised of different materials.
- 27. The electro-dynamic loudspeaker of claim 21 where the plurality of circuits are each comprised of conductive traces and the combined length of the traces for at least two of the plurality of circuits are different.
- 28. An electro-dynamic loudspeaker comprising:
a frame; a plurality of magnets mounted to the frame; a diaphragm mounted to the frame, the diaphragm having a driven portion; and a damping material layered on the diaphragm over at least part of the driven portion.
- 29. The electro-dynamic loudspeaker of claim 28 where the damping material is layered on the diaphragm to a thickness of about 0.1 mm to about 3 mm.
- 30. The electro-dynamic loudspeaker of claim 28 where the damping material is layered on the diaphragm to a first thickness in a first zone of the driven portion and to a second thickness in a second zone of the driven portion.
- 31. The electro-dynamic loudspeaker of claim 30 where the damping material is layered on the diaphragm to a thickness of about 0.1 mm in the first zone and to a thickness of about 3 mm in the second zone.
- 32. An electro-dynamic loudspeaker comprising:
a frame; a plurality of magnets mounted to the frame; a diaphragm mounted to the frame, the diaphragm having a length and a width, where the ratio of the length to the width is about 10:1.
- 33. The electro-dynamic loudspeaker of claim 30 where the length of the diaphragm is about 200 mm and about 400 mm and the width of the diaphragm is about 20 mm to about 65 mm.
- 34. An electro-dynamic loudspeaker comprising:
a polygonal-shaped frame, the frame having at least two pairs of sides that intersect at an angle the value of which is greater than ninety degrees; a plurality of magnets mounted to the frame; and a diaphragm mounted to the frame.
CROSS-REFERENCE TO RELATED APPLICATIONS.
[0001] This application claims the benefit of U.S. Provisional Patent Application Serial No. 60/380,001, filed on May 2, 2002; U.S. Provisional Patent Application No. 60/378,188, filed on May 6, 2002; and U.S. Provisional Patent Application No. 60/391,134, filed on Jun. 24, 2002. The disclosures of the above applications are incorporated by reference.
[0002] This application incorporates by reference the disclosures of each of the following co-pending applications which have been filed concurrently with this application: U.S. patent application Ser. No. ______, entitled “Mounting Bracket System,” filed May 2, 2003; U.S. patent application Ser. No. ______, entitled “Film Tensioning System,” filed May 2, 2003; U.S. patent application Ser. No. ______, entitled “Film Attaching System,” filed May 2, 2003; U.S. patent application Ser. No. ______, entitled “Electrical Connectors For Electro-Dynamic Loudspeakers,” filed May 2, 2003; U.S. patent application Ser. No. ______, entitled “Electro-Dynamic Loudspeaker Mounting System,” filed May 2, 2003; U.S. patent Application Ser. No. ______, entitled “Conductors For Electro-Dynamic Loudspeakers,” filed May 2, 2003; U.S. patent application Ser. No. ______, entitled “Frame Structure,” filed May 2, 2003; U.S. patent application Ser. No. ______, entitled “Acoustically Enhanced Electro-Dynamic Loudspeakers,” filed May 2, 2003; U.S. patent application Ser. No. ______, entitled “Frequency Response Enhancements For Electro-Dynamic Loudspeakers,” filed May 2, 2003; and U.S. patent application Ser. No. ______, entitled “Magnet Arrangement For Loudspeaker,” filed May 2, 2003.
Provisional Applications (3)
|
Number |
Date |
Country |
|
60380001 |
May 2002 |
US |
|
60391134 |
Jun 2002 |
US |
|
60378188 |
May 2002 |
US |