The present disclosure relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present disclosure and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader.

Disclosed is a sound transducer, which can be assembled, integrated or installed primarily in the consumer, pro audio, installation and automotive sectors on land, water and air with minimal space requirements, use of materials and weight. The transducer includes a ring sound wave shaper having a very flat, thin multi-layered, flexible membrane, which generates point-shaped or ring-shaped sound within the membrane diameter.

A speaker includes a supporting base, a first speaker assembly and a second speaker assembly. The first speaker assembly includes a first magnet, a first coil and a first diaphragm. The first magnet is disposed on the carrier. The first coil is configured to interact with the first magnet. The first diaphragm is connected to the first coil. The second speaker assembly includes a second magnet, a second coil and a second diaphragm. The second magnet is disposed on the carrier. The second coil is configured to interact with the second magnet. The second diaphragm is connected to the second coil. The first speaker assembly and the second speaker assembly are symmetrical relative to the carrier such that, in operation, the magnitudes of the displacement of the first diaphragm and the second diaphragm are the same, but the directions of the displacement are opposite.

A sound producing package structure includes a first sub-package structure and a second sub-package structure. The first sub-package structure includes a first substrate having a first opening and a first chip including a first membrane, wherein a first cavity is formed between the first membrane and the first substrate. The first sub-package structure and the second sub-package structure are stacked, and the second sub-package structure includes a second substrate and a second chip. The second substrate is connected to the first substrate and has a second opening. The second chip includes a second membrane, wherein a second cavity is formed between the second membrane and the second substrate. A gap, connected to the first opening and the second opening, is formed between the first substrate and the second substrate, such that an ambient of the sound producing package structure, the first cavity and the second cavity are connected.

The present invention provides a multipole engine array system and a loudspeaker, the multipole engine array system comprising a plurality of engine assemblies distributed in an annular array, the plurality of engine assemblies being fixed inside the cylindrical loudspeaker by means of a mounting base provided in a housing of the cylindrical loudspeaker; each engine assembly comprises a magnetic conduction plate and a magnet provided in the magnetic conduction plate; a magnetic field is formed between the magnet and the magnetic conduction plate; and the plurality of engine assemblies are arranged coaxially and annularly along the periphery of the mounting base, so as to form a multipole magnetic field having a plurality of magnetic pole directions. In the present invention, a multipole magnetic field enclosed by planes is formed by means of monopole equal-magnetic-plane magnetic fields in a multipole way, such that each pole face of an inductive diaphragm radiates sound waves with controllable power to any settable angular space at different angles; the diaphragms are driven to vibrate at the same time, so as to form more audio information, improving the power and efficiency of the loudspeaker, and increasing the response speed.

A display apparatus according to an embodiment of the present disclosure includes: a display cell that displays an image and has a thin-plate shape; one or more vibration exciters that are disposed on rear-surface side of the display cell and cause the display cell to vibrate; and an opposing plate opposed to the display cell with an air gap in between. The display apparatus further includes a sound-spreading adjustment member that is disposed between the display cell and the two or more vibration exciters, and controls spreading of a sound generated by vibration caused by the two or more vibration exciters.

A speaker is provided. The speaker includes a housing. The speaker also includes a first diaphragm plate positioned within the housing and comprising a first driving device forming an exterior surface of the first diaphragm plate. The speaker further includes a second diaphragm plate positioned within the housing and comprising a second driving device forming an exterior surface of the second diaphragm plate. In addition, the speaker includes an insert plate fixedly attached to the housing and positioned between the first diaphragm plate and the second diaphragm plate. The insert plate includes an insert plate driving device positioned adjacent the first driving device and the second driving device. The insert plate driving device is configured to interact with the first driving device to move the first diaphragm plate relative to the housing and interact with the second driving device to move the second diaphragm plate relative to the housing.

The present disclosure relates to a bone conduction speaker and its compound vibration device. The compound vibration device comprises a vibration conductive plate and a vibration board, the vibration conductive plate is set to be the first torus, where at least two first rods inside it converge to its center; the vibration board is set as the second torus, where at least two second rods inside it converge to its center. The vibration conductive plate is fixed with the vibration board; the first torus is fixed on a magnetic system, and the second torus comprises a fixed voice coil, which is driven by the magnetic system. The bone conduction speaker in the present disclosure and its compound vibration device adopt the fixed vibration conductive plate and vibration board, making the technique simpler with a lower cost; because the two adjustable parts in the compound vibration device can adjust both low frequency and high frequency area, the frequency response obtained is flatter and the sound is broader.

A multi-input-driving loudspeaker, including: a frame; a cone arranged on the frame; a main input-driving mechanism; and a plurality of secondary input-driving mechanisms; wherein the main input-driving mechanism is arranged between the plurality of secondary input-driving mechanisms; the main input-driving mechanism includes a main voice coil, a T-yoke, and a front panel and a first magnetic steel sleeved on the T-yoke, a main voice coil mounting hole is provided in the middle of the cone, an upper end portion of the main voice coil is connected to the main voice coil mounting hole; each of the secondary input-driving mechanisms includes a secondary voice coil and a secondary magnetic circuit assembly formed with a secondary magnetic gap, a plurality of secondary voice coil mounting holes are correspondingly provided on the cone, an upper end portion of each secondary voice coil is connected to a corresponding secondary voice coil mounting hole.

Provided is a small loudspeaker and a mid-treble loudspeaker with multi-input-drives, which increases the sensitivity of the small loudspeaker, improves the intelligibility of the small loudspeaker, and reduces the distortion, wherein the mid-treble loudspeaker with multi-input-drives comprises a sound membrane support, a sound membrane arranged on the sound membrane support, and a plurality of input driving mechanisms, each of the input driving mechanism comprises includes a voice coil and a magnetic circuit assembly for driving the voice coil to vibrate.