Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having acoustic wave modifying structure
Reexamination Certificate
2011-04-12
2011-04-12
Le, Huyen D (Department: 2614)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Having acoustic wave modifying structure
C381S338000, C381S349000
Reexamination Certificate
active
07925036
ABSTRACT:
A loudspeaker has a loudspeaker driver and a first tube having a base end coupled to the driver and extending towards the rear end of the loudspeaker. A second tube of larger cross sectional dimensions extends over the first tube and loudspeaker driver and has a rear end wall spaced from the open rear end of the second tube and a front end coupled to the driver. A third, open ended tube of smaller cross-sectional dimensions than the first tube extends through a rear end wall of the second tube and into the first tube, with the front end of the third tube spaced from the base of the first tube. A folded, three segment transmission line is formed between the first and second tubes, between the second and third tubes, and through the third tube.
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Matt Hills: “A Small Reflex TL,” XPRESS Magazine, 2003. vol. 24, No. 3 Mar. 2003, Audio Amateur, Petersborough, NH.
T.S.Korn, A Corner Loudspeaker with Coaxial Acoustical Line, Journal of the Audio Engineering Society, Jul. 1957, vol. 5, No. 3, pp. 138-141.
Le Huyen D
Procopio Cory Hargreaves & Savitch LLP
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