Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having acoustic wave modifying structure
Patent
1993-10-28
2000-10-31
Le, Huyen
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Having acoustic wave modifying structure
381345, 381349, 181156, 181199, H04R 2500
Patent
active
06141428&
ABSTRACT:
A speaker system having increased sound quality comprising a first and second speakers each having a front and back. The first and second speakers cooperate with a duct having a first elongated portion in fluid communication with the rear of the first speaker and a second elongated portion in fluid communication with the rear of the second speaker. The duct has an elongated bass port defined therein intermediate the first and second portions. Each of the speakers have their fronts in contact with the air outside of the duct and the backs of the speakers are in contact with the air inside the duct. The duct may have a first spur intermediate the first and second speakers with a bass port in the first spur. The duct may have a second and third spur at the axial extremities with the first and second speakers respectively engaging the second and third spurs. Each spur may have an axis and the axes of the spurs may be generally coplanar for automobile use. The bass port may be offset between the second and third spurs. The second and third spurs may be connected to the first and second speakers with flared connections. In some forms of the invention the flared connections bolt to existing speaker hardware. The first spur may have an axial extremity with an oblique face. The duct may be constructed from plastic and may be fiberglass lined. For truck applications, each spur may have an axis and the axis of the first spur may be generally perpendicular to the axes of the second and third spurs.
REFERENCES:
patent: 4638884 (1987-01-01), Lee
patent: 4756382 (1988-07-01), Hudson, III
patent: 4903300 (1990-02-01), Polk
patent: 4930596 (1990-06-01), Saiki et al.
patent: 5274709 (1993-12-01), Koizumi
Le Huyen
Smith Robert S.
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