According to an embodiment, an optical MEMS transducer includes a diffraction structure including alternating first reflective elements and openings arranged in a first plane, a reflection structure including second reflective elements and configured to deflect with respect to the diffraction structure, and an optical element configured to direct a first optical signal at the diffraction structure and the reflection structure and to receive a second optical signal from the diffraction structure and the reflection structure. The second reflective elements are arranged in the first plane when the reflection structure is at rest. Other embodiments include corresponding systems and apparatus, each configured to perform various embodiment methods.

The present invention provides methods and systems for a surround device that includes a generally circular arcuate portion that contains a first side and a second side, a first planar portion extends from the first side and a second planar portion extends from the second side, a plurality of outwardly facing ribs are disposed on the first side, and a plurality of inwardly facing ribs are disposed on the second side.

The present invention relates to a loudspeaker which can be arranged to minimise its overall depth while also increasing the breakup frequency and reducing potential rocking vibrations. Accordingly, the present invention is directed to a loudspeaker, comprising a magnet structure, and a voice coil lying within a magnetic field established by the magnet structure and responsive to electrical signals to undergo excursions from a rest position along an axis of motion; a driven body, connected to the voice coil and moveable to project acoustic waves from a front of the loudspeaker; and a suspension for providing a restoring force to the driven body towards the rest position, the suspension extending from an attachment point on the driven body to an attachment point on a fixed portion of the loudspeaker; wherein the driven body comprises a diaphragm and a support structure extending rearwardly from a connection point with the voice coil to a connection point with the suspension located rearward of the frontal part of the magnet structure.

According to an embodiment, an optical MEMS transducer includes a diffraction structure including alternating first reflective elements and openings arranged in a first plane, a reflection structure including second reflective elements and configured to deflect with respect to the diffraction structure, and an optical element configured to direct a first optical signal at the diffraction structure and the reflection structure and to receive a second optical signal from the diffraction structure and the reflection structure. The second reflective elements are arranged in the first plane when the reflection structure is at rest. Other embodiments include corresponding systems and apparatus, each configured to perform various embodiment methods.

An electrodynamic loudspeaker (10) including: a chassis (15), at least one magnetic circuit (20) secured to the chassis, at least one movable assembly (30) with respect to the chassis, the assembly (30) including a convex diaphragm (53) turned towards the outside of the loudspeaker, and at least one energizing coil (57) defining an axis (D) of the loudspeaker, a first suspension joint (35) connecting the assembly and the chassis, and a second suspension joint (40) of the assembly, the second joint being axially further away from the diaphragm than the first joint. The assembly further comprises at least one connecting member (59) secured to the diaphragm, the second joint including a radially inner attachment point (81) attached on the connecting member, and a radially outer attachment point (83) attached on the chassis.

Disclosed is a speaker device, comprising a vibration system, a magnetic circuit system, and an auxiliary system fixedly accommodating the magnetic circuit system and the vibration system. The vibration system comprises a center suspension comprising a first fixing portion, a second fixing portion within the first fixing portion, and a connecting arm connecting the first fixing portion and the second fixing portion. A central position of the second fixing portion is provided with a piezoelectric piece, the center suspension is provided with a first pad corresponding to the piezoelectric piece, and the piezoelectric piece is electrically connected to the first pad. The second fixing portion is provided with an antenna circuit. In the speaker device of the present invention, the signal emitted by the piezoelectric piece effectively increases the medium and high frequency effect and enhances the acoustic performance. The antenna circuit integrates the antenna device and the speaker device.

A speaker includes a frame having an accommodation space; a magnetic circuit system accommodated in the accommodation space; and a vibration system accommodated in the accommodation space for generating sound. The vibration system includes a diaphragm and a voice coil. The diaphragm includes a first part fixed with the frame and a second part arranged between the first part and the frame. One end of the second part is connected with the first part. The accommodation space is divided by the second part into a first accommodation space for accommodating the magnetic circuit system and a second accommodation space for accommodating the voice coil.

A microspeaker, includes a frame defining a space; a coil positioned in the space such that the frame extends around a perimeter of the coil; and a suspension suspending the coil within the space relative to the frame. The suspension is coupled to the frame and to the coil and allows the coil to vibrate in an axial direction during operation of the microspeaker, the suspension comprising a liquid metal polymer material. The suspension is formed from liquid metal particles embedded in a polymer matrix. The liquid metal polymer material is prestressed in a radial direction extending from the coil towards the frame. An outer perimeter of the suspension defines a first quadrilateral shape, and an inner perimeter of the suspension defines a second quadrilateral shape, the first and second quadrilateral shapes being concentric.

A loudspeaker includes a frame, a magnetic circuit provided with a magnetic gap, a cone-shaped diaphragm, a voice coil, and an LED. The magnetic circuit is connected to a lower part of the frame. The diaphragm is connected to an outer periphery of the frame. A first end of the voice coil is connected to the diaphragm, and a second end thereof is inserted into the magnetic gap. The LED is provide on an upper part of the frame, and outputs light toward the center of the diaphragm. The LED is disposed such that the diaphragm reflects the light.

A loudspeaker is disclosed. The loudspeaker includes a frame; a vibration system accommodated in the frame, a voice coil for driving the voice diaphragm and a support installed at one end of the voice coil away from the voice diaphragm. The vibration system includes a voice diaphragm, and the support is connected to the frame for providing elastic support to the voice coil. The loudspeaker further includes a magnetic circuit system for driving the vibration system. The magnetic circuit system includes a yoke, a first magnet portion, and a second magnet portion. The second magnetic portion includes an auxiliary magnet and an auxiliary pole plate overlapped with the auxiliary magnet. A light source installed on the auxiliary pole plate and opposite to the support, and a photosensitive sensor arranged on the support and being within the irradiation scope of the light source are further provided.