A space frame reinforced tweeter dome is disclosed. The tweeter dome includes a space frame and a convex diaphragm attached to the space frame. The space frame can include a crown portion in the form of a triangular frame and three leg portions each extending from a corresponding vertex of the triangular frame. Each leg portion has a distal foot adapted for connection to a voice coil former for movement therewith. The convex diaphragm can be comprised of a soft, e.g., textile, material while the space frame is comprised of rigid material such as metal. The space frame reinforced tweeter dome is free from ringing while being sufficiently rigid to follow the enormous accelerations of a music signal at high frequencies.

An electrostatic transducer includes first and second flexible conductive membranes; and first and second conductive stators. The membranes and the stators are assembled in a layered configuration with the membranes the stators. The electrostatic transducer is arranged in use to apply an electrical potential which gives rise to an electrostatic force between the membranes and the stators that causes the membranes to move relative to the stators. The first and second flexible conductive membranes have respective first and second effective compliances, wherein the first effective compliance is at least 10% greater than the second effective compliance.

A display apparatus includes a display module including a display panel configured to display an image, a rear cover on a rear surface of the display module, and a sound generating module at the rear cover and configured to vibrate the display module to generate sound, and a rear surface of the sound generating module is covered by the rear cover.

An electrostatic transducer includes first and second flexible conductive membranes; and first and second conductive stators. The membranes and the stators are assembled in a layered configuration with the membranes between the stators and with an enclosed volume of air sealed between the first and second membranes. The electrostatic transducer is arranged in use to apply an electrical potential which gives rise to an electrostatic force between the membranes and the stators that causes the membranes to move relative to the stators.

Embodiments of the disclosure disclose a vibrating diaphragm and a loudspeaker. The vibrating diaphragm includes a first diaphragm layer, a first conductive metal layer and a second diaphragm layer which are stacked sequentially. The first conductive metal layer includes two metal foils. Each of the metal foils includes a first conductive part, a second conductive part, and a first supporting part arranged between the first conductive part and the second conductive part. The second diaphragm layer is provided with a plurality of leaks to expose the first conductive part and the second conductive part. Therefore, the metal foils are integrated between the first diaphragm layer and the second diaphragm layer, so that the space occupied by the metal foils may be reduced to simplify the conduction design of the loudspeaker, and the metal foils may be protected to avoid the breakage of the metal foils.

The invention relates to a dynamic loudspeaker driver which comprises a magnet-system, a membrane and a voice coil. The membrane comprises a semi-rigid diaphragm and a flexible annulus surrounding the diaphragm. The diaphragm is movably mounted with respect to the magnet-system by means of the annulus and comprises a substrate which comprises a first surface and a second surface being opposite to the first surface, a first layer attached to and continuously covering the first surface, and a second layer attached to and covering the second surface. The second layer comprises a plurality of holes having a predefined pattern. The voice coil is attached to the diaphragm and is operatively coupled with the magnet-system.

The invention relates to audio transducers, such as loudspeaker, microphones and the like, and includes improvements in or relating to hinge systems for rotational action audio transducers. The hinge systems of the invention being configured to operatively support a diaphragm in use, and comprising a hinge assembly having one or more hinge joints, wherein each hinge joint comprises a hinge element and a contact member. The contact member comprises a contact surface and the configuration is such that during operation each hinge joint is configured to allow the hinge element to move relative to the associated contact member, while maintaining a substantially consistent physical contact with the contact surface. The hinge assembly biases the hinge element towards the contact surface. Preferably the hinge assembly is configured to apply a biasing force to the hinge element of each joint toward the associated contact surface, compliantly. Various applications and implementations are described and envisaged for the audio transducer embodiments including, for example, personal audio devices such as headphones, earphones and the like.

The present invention provides a silicon microphone with a high-aspect-ratio corrugated diaphragm and a microphone package including the same. The microphone comprises the corrugated diaphragm on which at least one ring-shaped corrugation is formed in the vicinity of the edge of the diaphragm which is fixed to the substrate, the corrugated diaphragm is flexible, wherein the ratio of the depth of the corrugation to the thickness of the diaphragm is larger than 5:1, preferably 20:1, and the walls of the corrugation are inclined to the surface of the diaphragm at an angle in the range of 80 to 100. The microphone with the high-aspect-ratio corrugated diaphragm can achieve a consistent and optimal sensitivity and greatly reduce impact applied thereto in a drop test so that the performances, the reproducibility, the reliability and the yield can be improved. The microphone package of the present invention further provides a simplified processing, an improved sensitivity and an improved SNR.

The present invention relates to a membrane plate structure for generating sound waves. The membrane plate structure comprises a first skin layer, a second skin layer, a foam core layer which is interposed between the first skin layer and the second skin layer, and two binding layers. At least one of the first skin layer and the second skin layer is attachable to a vibrating element for generating sound waves. The elastic modulus of the core layer and its density are lower than the elastic modulus and the density of the first skin layer and the second skin layer, so that a sandwich structure is achieved. The Young modulus and the shear modulus of first skin layer, the second skin layer, the core layer and the binding layers are not variating between each other of more than 30% between a temperature 20 C. and 150 C., particularly between 20 C. and 170 C., more particularly 20 C. and 180 C.

The present invention relates to a membrane plate structure for generating sound waves. The membrane plate structure comprises a first skin layer, a second skin layer, a foam core layer which is interposed between the first skin layer and the second skin layer, and two binding layers. At least one of the first skin layer and the second skin layer is attachable to a vibrating element for generating sound waves. The elastic modulus of the core layer and its density are lower than the elastic modulus and the density of the first skin layer and the second skin layer, so that a sandwich structure is achieved. The Young modulus and the shear modulus of first skin layer, the second skin layer, the core layer and the binding layers are not variating between each other of more than 30% between a temperature 20 C. and 150 C., particularly between 20 C. and 170 C., more particularly 20 C. and 180 C.