This disclosure provides a diaphragm structure of a loudspeaker, including a surround and an annular body. The surround is annular and has an inner rim and an outer rim relative to the inner rim. The annular body disposed on the inner rim of the surround is integrally formed by a plurality of rigid reinforcing units arranged in a circle. Each rigid reinforcing unit includes a first side edge, a second side edge, and two third side edges connected to the first side edge and the second side edge. The two third side edges are formed by a plurality of first reference points at different height positions, and heights of the first reference points asymmetrically and gradually decrease from the middle towards the first side edge and the second side edge to form a substantially upward curve. A peak ridge line is defined between first reference points at the highest position of the two third side edges located on the opposite sides, and the peak ridge line is formed by a plurality of second reference points at different height positions, and heights of the second reference points symmetrically and gradually increase from the middle towards the two third side edges to form a substantially downward curve.

An audio amplified combustion system is described that has a fuel injector a positioned proximate to a speaker so that a flame moves in concert with audio emitted from the speaker. A projection column and projection top can be positioned above the cone of the speaker to define a volume for the combustion. Various apparatuses, methods, and systems for keeping the speaker cool are also described. Coating on various parts of the system to increase or decrease emissivity or absorptivity of various parts can keep the speaker cool. In addition, a control unit can cause the speaker to pant or vibrate at a low or high frequency to induce convective and keep the speaker cool. These and other features of the audio amplified combustion system are described herein.

The invention relates to audio transducers, such as loudspeaker, microphones and the like, and includes improvements in or relating to: audio transducer diaphragm structures and assemblies, audio transducer mounting systems; audio transducer diaphragm suspension systems, personal audio devices incorporating the same and any combination thereof. The embodiments of the invention include linear action and rotational action transducers. For both types of transducer, rigid and composite diaphragm constructions and unsupported diaphragm periphery designs are described. Systems and methods for mounting the transducer to a housing, such as an enclosure or baffle are also described. Furthermore, hinge systems including: rigid contact hinge systems and flexible hinge systems are also disclosed for various rotational action transducer embodiments. 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.

A speaker, including: a magnetic circuit system, a vibration system, and a speaker support, the speaker support is provided with a mounting cavity, both the magnetic circuit system and the vibration system are mounted in the mounting cavity; the vibration system includes a metal diaphragm and a flexible connector; the metal diaphragm is placed in the mounting cavity; an inner periphery of the flexible connector is bonded to an outer periphery of the metal diaphragm, and an outer periphery of the flexible connector is bonded to an inner periphery of the speaker support. The overall rigidity of the vibration system of the speaker

An electro-acoustic product, and more particularly to a metal diaphragm and a speaker. The metal diaphragm includes a hemispherical diaphragm portion that is provided with a central convex, a hemispherical diaphragm portion periphery is extended in a horizontal direction and configured to form an annular flat diaphragm portion, a annular flat diaphragm portion periphery is folded toward the convex direction of the hemispherical diaphragm portion and configured to extend away from the hemispherical diaphragm portion to form a trumpet-shaped diaphragm portion; a height of a trumpet-shaped diaphragm outer periphery portion away from the hemispherical diaphragm portion is greater than a height of a top portion of the hemispherical diaphragm portion. Thereby the split distortion of the speaker at high-frequency is reduced to ensure that the metal diaphragm can be normally vibrated to produce sound.

A diaphragm, including: a metal dome, a non-metallic diaphragm portion, and a flexible rim. The non-metallic diaphragm portion is bonded to a metal dome outer periphery, and a non-metallic diaphragm portion outer periphery extends corresponding to a convex direction of the metal dome and expands radially away from the metal dome. The flexible rim is bonded to the non-metallic diaphragm portion outer periphery. The diaphragm of the present application adopts the combination of the metal dome, the non-metallic diaphragm portion, and the flexible rim, the overall rigidity of the diaphragm is enhanced, and the internal damping property of the diaphragm and the compliance of the vibration of the diaphragm can be adjusted, which can effectively reduce segmentation vibration of the diaphragm during high-frequency vibration and reduce the segmentation distortion of the diaphragm at high frequencies, thereby extending the bandwidth of the diaphragm.

A micro-electro-mechanical (MEMS) structure and a method for forming the same are disclosed. The MEMS structure includes a sacrificial layer, a lower dielectric film, an upper dielectric film, a plurality of through holes and a protective film. The sacrificial layer comprises an opening. The lower dielectric film is on the sacrificial layer. The upper dielectric film is on the lower dielectric film. The plurality of through holes passes through the lower dielectric film and the upper dielectric film. The protective film covers side walls of the upper dielectric film and the lower dielectric film and a film interface between the lower dielectric film and the upper dielectric film.

According to an embodiment, a MEMS transducer includes a stator, a rotor spaced apart from the stator, and a multi-electrode structure including electrodes with different polarities. The multi-electrode structure is formed on one of the rotor and the stator and is configured to generate a repulsive electrostatic force between the stator and the rotor. Other embodiments include corresponding systems and apparatus, each configured to perform corresponding embodiment methods.

An apparatus including a transducer configured to generate sound, where the transducer comprises a diaphragm. At least one portion of the transducer is electrically conductive and is configured to provide an electrical connectivity to a ground. The at least one portion, at least in part, circumferences the diaphragm.

An ultra-thin planar magnetic film full-frequency speaker comprises a vibration system, a magnetic system, a frame, and an acoustic foam. The vibration system and the magnetic system are received and fixed in the interior of the frame. The vibration system comprises a vibration film and a planar voice coil, the vibration film forming a contiguous inward recess structure in the middle thereof, the planar voice coil being provided with a bar-like aperture, and the planar voice coil being adhered and fixed to the vibration film The magnetic system comprises a U-shaped soft iron and a bar-shaped magnet, the bar-shaped magnet being disposed above the U-shaped soft iron and disposed beneath the bar-shaped aperture, the U-shaped soft iron being connected to the frame by means of injection molding, and the acoustic foam being adhered to a bottom face of the U-shaped soft iron.