| 摘要 |
A shallow loudspeaker provided with a chassis ( 2 ), a movable body ( 4 ), a resilient suspension for guiding the movable body with respect to the chassis along a translation axis (T), and an electric actuator ( 6 ) for driving the movable body along the translation axis. The movable body has a diaphragm structure comprising a central domeshaped diaphragm ( 8 ) and a cone-shaped diaphragm ( 10 ) concentrically arranged with respect to the dome-shaped diaphragm. The cone-shaped diaphragm has a back portion ( 10 <SUB>b</SUB>) and a front portion ( 10 <SUB>f</SUB>) which is wider than the back portion. Both diaphragms are attached to each other near the back portion of the cone-shaped diaphragm, the cone-shaped diaphragm enveloping the dome-shaped diaphragm. The resilient suspension comprises a first resilient element ( 12 a) connecting the diaphragm structure to the chassis near the back portion of the cone-shaped diaphragm, and a second resilient element ( 12 b) connecting the diaphragm structure to the chassis near the front portion of the cone-shaped diaphragm.
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