Bone conduction sound transmission devices

A bone conduction sound transmission device, comprising:

• a laminated structure formed by a vibration unit and an acoustic transducer unit;
• and
• a base structure configured to load the laminated structure, at least one side of the laminated structure being physically connected to the base structure;
• wherein
• the base structure vibrates based on an external vibration signal, and the vibration unit deforms in response to the vibration of the base structure;
• and the acoustic transducer unit generates an electrical signal based on the deformation of the vibration unit, wherein the vibration unit includes a suspension membrane structure, and the acoustic transducer unit includes a first electrode layer, a piezoelectric layer, and a second electrode layer arranged in sequence from top to bottom, the suspension membrane structure is connected to the base structure through a peripheral side of the suspension membrane structure, and the acoustic transducer unit is located on an upper surface or a lower surface of the suspension membrane structure.