| 摘要 |
An economical and compact dual-chamber loudspeaker includes a small driver received within a partition extending between, and in acoustical and pneumatic communication with, both a front and a back chamber, each of which has a relatively small volume. An elongated vent is in acoustical and pneumatic communication between the front and back chamber at a substantially planar opening in the partition. The drone cone is in acoustical and pneumatic communication between the front chamber and the outside environment at a substantially planar opening in the housing. The two openings are spaced apart and generally parallel to each other. In a preferred embodiment, the volume of the chambers is minimized by securing an elongated concentric vent around the vent extending between the front and back chambers. In an alternative preferred embodiment, there are at least two elongated vents in acoustical and pneumatic communication with the front and back chambers, and each vent is spaced equal distance from the driver and from each other such that they distribute the pneumatic loads between the front and back chambers evenly, thereby preventing pneumatic forces emanating from the vents from applying asymmetric force to the drone cone.
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