Disclosed is a vibrating film comprising a vibrating film body, wherein the vibrating film body comprises a central plane part and a peripheral fixing part. A Dome reinforcing part is arranged on the plane part, a first thermosetting adhesive layer is provided between the plane part and the Dome reinforcing part, and the plane part and the Dome reinforcing part are adhered together by thermosetting through the first thermosetting adhesive layer. Further disclosed is an assembling process for the vibrating film.

A speaker including a frame, and a magnet assembly coupled to the frame. The magnet assembly forms an air gap through which a magnetic flux is directed. The speaker further including a voice coil suspended in the air gap, a diaphragm coupled to the voice coil and a compliant suspension member for suspending the voice coil within the air gap. The suspension member includes an electrically conductive biphasic member for providing an electrical connection between the voice coil and a circuit coupled to the frame.

Disclosed is a coil module, comprising: a vibrating membrane suspended on an air chamber defined and supported by a first substrate, at least one planar coil, embedded in the vibrating membrane, and at least a soft magnet, embedded in the vibrating membrane and disposed surrounding at least a portion of a contour of the planar coil; wherein a substantial portion of the planar coil locates at substantially the same plane where a portion of the soft magnet is arranged.

Disclosed is a coil module, comprising: a vibrating membrane suspended on an air chamber defined and supported by a first substrate, at least one planar coil, embedded in the vibrating membrane, and at least a soft magnet, embedded in the vibrating membrane and disposed surrounding at least a portion of a contour of the planar coil; wherein a substantial portion of the planar coil locates at substantially the same plane where a portion of the soft magnet is arranged. A microspeaker and a method for preparing the same are also disclosed.

Various implementations include miniature loudspeaker drivers. In some aspects, an electro-acoustic driver includes: a cone having a surface area configured to radiate acoustic energy; a suspension coupled to the cone; and a support structure coupled to the suspension and having an outer linear dimension in a plane of the cone of approximately 6.0 millimeters (mm) or less, wherein the surface area of the cone is at least 49% of an overall cross-sectional area of the electro-acoustic driver in the plane of the cone.

A bracket assembly suitable for use with an electronic device is described. The bracket assembly may include a bracket body having a channel. The bracket assembly may further include a membrane embedded in the bracket body and designed to allow air, but not liquid (such as water), to pass through the membrane. The membrane may be at least partially surrounded by a membrane support molded to the membrane. The membrane and the membrane support may be disposed in a molding tool to receive a material used to mold the bracket body over the membrane and the membrane support. During the molding operation, the membrane support may act as a buffer to shield the membrane from temperature and pressure increases associated with the molding operation of the bracket body. The bracket assembly may improve the ability of the electronic device to prevent liquid ingress.

The present application discloses a miniature speaker. The miniature speaker includes a vibration system including a diaphragm, a voice coil for driving the diaphragm, and a suspension connected to the voice coil; a magnetic circuit system interacting with the voice coil for driving the diaphragm to radiate sound waves; and a frame for accommodating the vibration system and the magnetic circuit system. The suspension includes an outer edge connecting to the frame, an inner edge engaging with the voice coil, and a plurality of spring arms connecting the outer edge to the inner edge. The suspension includes a first isolative layer, a second isolative layer, and a conductive layer. The first isolative layer forms a mounting surface out of which at least part of the conductive layer exposes for connecting to the voice coil.

Circumferential mode vibrations, in a diaphragm of an acoustic transducer, are damped by defining at least one elongated opening extending radially along a portion of a length from the central area to the outer perimeter being covered by a material having higher damping properties than the material of the cone.

Circumferential mode vibrations, in a diaphragm of an acoustic transducer, are damped by defining at least one elongated opening extending radially along a portion of a length from the central area to the outer perimeter being covered by a material having higher damping properties than the material of the cone.

Circumferential mode vibrations, in a diaphragm of an acoustic transducer, are damped by defining at least one elongated opening extending radially along a portion of a length from the central area to the outer perimeter being covered by a material having higher damping properties than the material of the cone.