Loudspeaker

A loudspeaker, comprising

• a support frame;
• a first diaphragm assembly, disposed in the support frame;
• a second diaphragm assembly, disposed in the support frame and opposite the first diaphragm assembly in a first direction;
• a first vibration assembly, wherein the first vibration assembly is located between the first diaphragm assembly and the second diaphragm assembly in the first direction and comprises a first piezoelectric cantilever, the first piezoelectric cantilever comprises a first fixed end and a first free end, the first fixed end is connected to the support frame, and the first free end is suspended inside the support frame and connected to the first diaphragm assembly;
• and
• a second vibration assembly, wherein the second vibration assembly is located between the second diaphragm assembly and the first vibration assembly in the first direction and comprises a second piezoelectric cantilever, the second piezoelectric cantilever comprises a second fixed end and a second free end, the second fixed end is connected to the support frame, and the second free end is suspended inside the support frame and connected to the second diaphragm assembly;
• wherein the first piezoelectric cantilever and the second piezoelectric cantilever are disposed opposite each other in the first direction, a length of the first piezoelectric cantilever in a second direction is different from a length of the second piezoelectric cantilever in the second direction, and the second direction is perpendicular to the first direction.