An electrodynamic transducer having a coil, a membrane, and a plate is disclosed, wherein the transducer is adapted to generate a sound pressure level in the human-audible acoustic range and the ultrasonic range so that the transducer may be used as a speaker and an ultrasonic proximity sensor. The transducer may be adapted to generate a sound pressure level above about 88 dB between 20 kHz and 70 kHz. The plate may include a structural rigidity increasing feature such as a domed portion or a population of ribs, which may increase the generated sound pressure level in the ultrasonic range. The transducer may also include a front resonator which may be used to further tune and/or increase the generated sound pressure level in the ultrasonic range.

A loudspeaker is disclosed. The loudspeaker includes a magnetic circuit system including a first magnetic part, a second magnetic part surrounding the first magnetic part, and a magnetic gap formed by the first and second magnetic parts. At least one of the first and second magnetic parts is a magnet. The first magnetic part includes a body and an avoiding part formed surrounding an edge of the body.

The present invention discloses a speaker module. The speaker module comprises an inner cavity defined by a shell, and a first induction coil. A single speaker piece is provided in the inner cavity of the shell, the first induction coil is configured to be electrically connected with a terminal device, and a second induction coil, which corresponds to the first induction coil and is configured to be electrically connected with a voice coil in the single speaker piece, is also provided on the shell. According to the speaker module, an output end of a complete machine and the voice coil are conducted through the first induction coil and the second induction coil; and by the adoption of such a structure, the space of the module can be greatly saved, and a lighter and thinner complete machine can be developed. In addition, the problems, such as poor performance due to the change of the resistance value in a traditional electro-acoustic connection way, can be solved. By the adoption of the structure, the first induction coil is allowed to be provided outside the inner cavity, the shell can be sealed at a time, wiring from the outside to the inside is not needed any more. In this way, secondary sealing of a lead position is avoided, production and transportation of the speaker module are greatly simplified, and assembly between the speaker module and the terminal device is also greatly simplified.

The present invention discloses a speaker module, comprising: a speaker assembly, a module shell and a front cover. The module shell is configured to bear the speaker assembly, and comprises a first shell and a second shell, wherein the first shell is doped with a thermally conductive filler. The front cover is configured to cooperate with the module shell to encapsulate the speaker assembly. The speaker module provided by the present invention can quickly discharge heat generated by the speaker assembly during operation through the module shell to prevent overheat of the speaker assembly, thereby avoiding performance loss of a speaker due to high temperature.

The present disclosure relates to a magnetic circuit assembly of a bone conduction speaker. The magnetic circuit assembly may generate a first magnetic field. The magnetic circuit assembly may include a first magnetic element, and the first magnetic element may generate a second magnetic field. The magnetic circuit may further include a first magnetic guide element and at least one second magnetic element. The at least one second magnetic element may be configured to surround the first magnetic element and a magnetic gap may be configured between the second magnetic element and the first magnetic element. A magnetic field strength of the first magnetic field within the magnetic gap may exceed a magnetic field strength of the second magnetic field within the magnetic gap.

This document describes techniques and systems that enable a range extender device. The techniques and systems include a user device that includes a housing with an audio sensor, a heat sink assembly, a circuit board assembly, and a speaker assembly positioned within the housing. The housing includes a top housing member connected to a bottom housing member. The top housing member includes a concave-down top-end portion connected to a generally-cylindrical vertical wall via rounded corners. The heat sink assembly includes a heat sink and one or more antennas positioned proximate to an inner surface of the vertical wall. The circuit board assembly is positioned within the housing and proximate to the heat sink assembly, and the speaker assembly is positioned within the housing and connected to the circuit board assembly. Also, a light ring assembly is connected to a bottom exterior surface of the bottom housing member.

A display apparatus may include a display panel including a display area configured to display an image, and a non-display area, an optical module on a rear surface of the display panel, at least one first sound generator on a rear surface of the optical module, and at least one second sound generator in the non-display area and between the display panel and the optical module.

Voice coil actuators and loudspeakers containing same. The voice coil actuators include moving voice coil assemblies that have multiple segments. Each segment of a moving voice coil assembly is separately controlled by an amplifier, one channel of an amplifier, and combinations thereof utilized in combination with a position sensor that senses the position of the moving voice coil assembly. By this arrangement, the voice coil actuators produce a linear force per unit current throughout the range of motion while obtaining the benefits and advantages associated with both over-hung and under-hung voice coil actuator designs.

Disclosed in the present disclosure are a sound production apparatus and an electronic device. The sound production apparatus comprises a holder, a vibration unit, an elastic member, and a damping member, wherein the elastic member connects the holder and the vibration unit, and the damping member is disposed on the elastic member. The technical solution of the present disclosure aims at preventing the elastic member from resonating with the vibration unit, thereby ensuring the vibration trajectory of the vibration unit, and ensuring the operation stability of the sound production apparatus.

Disclosed in the present disclosure are a sound production apparatus and an electronic device. The sound production apparatus comprises a holder, a vibration unit, an elastic member, and a damping member, wherein the elastic member connects the holder and the vibration unit, and the damping member is disposed on the elastic member. The technical solution of the present disclosure aims at preventing the elastic member from resonating with the vibration unit, thereby ensuring the vibration trajectory of the vibration unit, and ensuring the operation stability of the sound production apparatus.