Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Mounting or support feature of housed loudspeaker
Patent
1999-04-09
2000-07-25
Le, Huyen
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Mounting or support feature of housed loudspeaker
381189, 381391, 381433, H04R 2500
Patent
active
060944978
ABSTRACT:
The loudspeaker system having back pressure equalization apparatus functions to minimize the mismatch between the forward sound wave and the reverse sound wave that is generated by the loudspeaker by rotating the apertures that are formed in the basket to be in alignment with the corners of the enclosure. This rotation causes sound wave reflections within the loudspeaker enclosure at angles at other than 90 degrees to thereby redirect the acoustic reflections within the enclosure away from the back side of the loudspeaker cone. These reflections are also more likely to be absorbed by the sound absorbing material that is mounted on the inside of the enclosure rather than causing perturbations in the cone. In addition, the back edge of the baffle is releaved using a bevel, radius or other contour or apertures formed in the baffle to prevent the blocking of the basket apertures by the baffle. To increase the rigidity of this structure, the releaving/aperture can be selectively included to align with the basket apertures and no releaving/aperture is provided where the basket rib and mounting points are located.
REFERENCES:
patent: 3909530 (1975-09-01), Gosswiller
patent: 3995125 (1976-11-01), Cypser
Le Huyen
Lucent Technologies - Inc.
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