This application provides a speaker and a mobile terminal. The speaker includes a housing and a kernel located in the housing, where there is a front cavity and a rear cavity in the housing, the front cavity is in communication with the outside, and the rear cavity is an isolated cavity. In addition, to reduce a space area occupied by the entire speaker, the front cavity and the rear cavity are disposed in a stacked manner when being disposed. Specifically, the front cavity and the rear cavity are at least partially stacked along a thickness direction of the kernel. Therefore, the rear cavity is disposed in space of the entire speaker in the thickness direction of the kernel, to reduce an area occupied by the entire speaker in the mobile terminal on the premise that a size of the rear cavity meets a requirement.

A forced ventilation woofer or electromechanical transducer (e.g., 200 or 300) includes a motor structure and voice coil winding support structure or former (203 or 303) configured with a vented annular spacer (e.g., 250) and vented distal pole tip member (e.g., 255) having aligned radial channels aimed to transport heat away from a voice coil (202 or 302) during the transducer's reciprocating movement while providing an extended, linear dynamic range and continuous cooling for the voice coil. A dual magnetic gap embodiment has an inside annular spacer member (e.g., 355A) and a co-planar outside annular spacer member (e.g., 350-O), each made of a thermally conductive steel alloy.

The present invention provides a multifunctional LED device and multifunctional speaker system. The multifunctional LED device includes a power supply unit; a control unit configured to process audio signals and control commands; an audio power amplifier configured to drive a speaker; a speaker; a first wireless transceiver configured to communicate with a smart terminal; a second wireless transceiver configured to communicate with other LED devices; and an LED light source. The multifunctional speaker system includes several multifunctional wireless LED devices configured to works as wireless speakers, and a smart terminal to control the system remotely. The smart terminal may communicate with and control all the multifunctional LED devices. The multifunctional LED devices may communicate with each other. Two multifunctional LED devices may be configured as a 2.0-channel speaker system. Other speaker systems, such as 2.1-channel, 5.1-channel speaker systems, may be realized using more multifunctional wireless LED devices.

Methods and systems are provided for a portable speaker arranged in a vehicle. In one example, a system comprises a speaker configured to dock mechanically to a docking station in an area of a vehicle, wherein the speaker further comprises a removable battery.

A vibration system is disclosed. The vibration system includes a vibrating diaphragm including a dome part and a suspension part encircling the dome part; a voice coil for driving the vibration diaphragm; and a heat conduction plate located between and connected with the dome part and the suspension part. The heat conduction plate includes a lower surface connecting with the voice coil and an upper surface opposite to the lower surface. The suspension part includes an internal peripheral part connected with the heat conduction plate, the dome part comprises a joint part connected with the heat conduction plate, and the upper surface of the heat conduction plate is at least partially exposed outside.

An electronic device is provided. The electronic device includes a housing, a battery, an antenna, a speaker module, and a heat sink. The battery, the antenna, the speaker module, and the heat sink are all disposed in a cavity formed by the housing. The battery and the speaker module are disposed adjacent to each other. A gap exists between the battery and the speaker module. The antenna is disposed on a periphery of a region where the battery and the speaker module are located. The heat sink is disposed on the speaker module and the battery, and an opening is disposed on the heat sink, where the opening is opposite to the gap.

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 improved compact electroacoustic transducer and loudspeaker system. The electroacoustic transducer (or array of electroacoustic transducers) can generate the desired sound by the use of pressurized airflow. The electroacoustic transducer uses a shared stator with an array of vent support fingers and metal frame instead of two stators per electroacoustic transducer.

Method to perform thermal monitoring of an electro-mechanical actuator included in a device starts by receiving an in-field calibration temperature from a temperature sensor included in the device. The device may also receive an in-field calibration resistance from a resistance calculator included in the device. A calculated thermal coefficient of resistivity of the electro-mechanical actuator is then computed using an equation that relates the calculated thermal coefficient of resistivity to the in-field calibration temperature. The calculated thermal coefficient of resistivity changes based on the in-field calibration temperature. The equation includes parameters that are stored in the device. A temperature estimate of the electro-mechanical actuator is them computed based on the calculated thermal coefficient of resistivity. Other embodiments are also described.

A speaker includes a shell, a speaker housing, and a heat sink. The heat sink is fixed inside the shell. The speaker housing is mounted to the heat sink such that the speaker housing is suspended from the heat sink inside the shell. An interior of the speaker housing is spheroidal.