Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic
Reexamination Certificate
2005-02-17
2008-10-28
Young, Wayne (Department: 2627)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Electromagnetic
C381S409000, C381S410000, C381S412000, C381S414000
Reexamination Certificate
active
07443995
ABSTRACT:
An acoustic driver has a voice coil in which adjacent turns of the coil are spaced apart. The driver is placed at one end of a foam-lined, elongated structure, such as a tube. An opposing end of the structure is, in one embodiment, enclosed by a wall that is connected to the structure by a suspension so that it moves in sympathy with the driver. In another embodiment, the structure cooperates with the acoustic driver to form one or more restrictive passageways confined around the driver's motor and an inner surface of the structure. The passageway(s) couple a volume of air in the structure to the exterior of the structure in a manner that reduces the transmission of acoustic energy without creating alternating pressure within the structure that interferes with the movement of the voice coil's diaphragm, at its maximum points of excursion.
REFERENCES:
patent: 3632904 (1972-01-01), Mauz
patent: 3711659 (1973-01-01), Bremseth
patent: 3963882 (1976-06-01), Lewis
patent: 4289937 (1981-09-01), Ikeda et al.
patent: 4414437 (1983-11-01), Trauernicht et al.
patent: 4466505 (1984-08-01), Ritter
patent: 4473811 (1984-09-01), Schauble
patent: 4568845 (1986-02-01), Uehara
patent: 4590332 (1986-05-01), Delbuck
patent: 4897877 (1990-01-01), Telzlaff
patent: 5027412 (1991-06-01), Hayashi et al.
patent: 5381483 (1995-01-01), Grau
patent: 5701359 (1997-12-01), Guenther et al.
patent: 5940522 (1999-08-01), Cahill et al.
patent: 6111969 (2000-08-01), Babb
patent: 6421449 (2002-07-01), Hasegawa et al.
Babb Alan
Babb Burton
Babb Laboratories
Gardere Wynne & Sewell LLP
Pendleton Dionne H
Young Wayne
LandOfFree
Acoustic loudspeaker does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Acoustic loudspeaker, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Acoustic loudspeaker will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4011946