The electromechanical transducer is provided with: a structure portion in which a magnet, yokes, and a coil are integrally arranged; an armature which includes an inner portion penetrating through an internal space of the structure portion along a central axis in the X-direction, and outer portions, constitutes a magnetic circuit with the structure portion, and is displaced in the Z-direction; and elastic members providing the armature with a recovery force. Each of the elastic members has a first and a second engaging portions. A width in which a force in the Z-direction acts between each of the elastic members and the structure portion via the first engaging portion has a first distance. A width between each of the elastic members and the outer portion via the second engaging portion has a second distance in the Y-direction, wherein the dimension condition of 2a>2×2b is set.

Provided is a speaker, including a frame; a vibration unit fixed to the frame; and a magnetic circuit unit driving the vibration unit to vibrate and produce sound and provided with a magnetic gap. The vibration unit includes a diaphragm, a voice coil, and an elastic support assembly; the diaphragm includes a diaphragm body, a diaphragm fixing portion, and a diaphragm supporting portion; the vibration unit further includes a fixing ring; and the elastic support assembly includes an elastic member fixed to a side of the fixing ring close to the diaphragm, and an auxiliary diaphragm provided on a side of the elastic member away from the diaphragm; and the diaphragm supporting portion is fixed to a side of the elastic member away from the fixing ring. With this structure, the overall strength and reliability of the speaker can be improved.

An output apparatus according to an embodiment of the present technology includes: one or more display panels; a support member; and an actuator section. The one or more display panels are capable of displaying an image. The support member includes a support portion for supporting the respective one or more display panels. The actuator section is disposed between the one or more display panels and the support portion and vibrates the respective one or more display panels. In this output apparatus, an image is output by the one or more display panels. Further, the actuator section is disposed between the display panels and the support portion of the support member, and the display panels are vibrated. As a result, it is possible to output an image and sound with high quality.

The inventive subject matter is directed to headset audio systems having resonance chambers designed to improve a system's frequency response in certain ranges. Systems of the inventive subject matter include a casing that both holds a speaker driver and creates two resonance chambers. Each resonance chamber vents to ambient air outside the casing, where the length and cross-sectional areas of each vent can impact the system's frequency response. Each resonance chamber is tuned to a resonant frequency to improve the system's frequency response across a range of frequencies on either side of each chamber's resonant frequency.

Provided are a loudspeaker assembly and an electronic device. The loudspeaker assembly includes: a housing having an internal cavity; a loudspeaker unit built in the internal cavity and including a loudspeaker diaphragm; and a separator provided in the internal cavity, the internal cavity being divided by the separator and the loudspeaker unit into a first cavity and a second cavity; where the housing has a through hole, the first cavity communicates with an exterior of the housing by the through hole, and the loudspeaker diaphragm is positioned in the first cavity; and the separator is provided with a balance hole in communication with the first cavity, and the second cavity is in communication with the first cavity through the balance hole.

A MEMS resonator is described.

There is provided a content presentation system, a content presentation device, and a wind presenting device which are suitable for content presentation by air blast. The content presentation system includes a control unit and a wind presenting device. The control unit generates a wind presentation drive signal on the basis of a predetermined trigger included in content. The wind presenting device includes a housing including an opening formed therein, a diaphragm supported by the housing, and a diaphragm drive mechanism that drives the diaphragm on the basis of the wind presentation drive signal, reduces a volume of a space formed by the housing and the diaphragm, and causes air in the space to blast from the opening.

There is provided a content presentation system, a content presentation device, and a wind presenting device which are suitable for content presentation by air blast. The content presentation system includes a control unit and a wind presenting device. The control unit generates a wind presentation drive signal on the basis of a predetermined trigger included in content. The wind presenting device includes a housing including an opening formed therein, a diaphragm supported by the housing, and a diaphragm drive mechanism that drives the diaphragm on the basis of the wind presentation drive signal, reduces a volume of a space formed by the housing and the diaphragm, and causes air in the space to blast from the opening.

Magnetic field cancelling audio systems and associated devices are disclosed. In one embodiment, an audio system with two electromagnetic audio drivers positioned and electrically connected to reduce emitted magnetic fields over a range of predefined frequencies.

The present disclosure relates to a method for simultaneously operating a loudspeaker assembly in a loudspeaker function and in a microphone function. The loudspeaker assembly comprises a coil, which is movably mounted in the magnetic field of a magnet, and a diaphragm, which is mechanically coupled to the coil, wherein the magnet produces a magnetic flux density (B), the coil, has an effective length in the magnetic field, and the diaphragm has an area (A). In order to determine a first transfer function Z.sub.M, a first calibration state is set, in which an external sound pressure (p) on the diaphragm is equal to zero. In order to determine a second transfer function Z.sub.C, a second calibration state is set, in which movement of the diaphragm is suppressed. Subsequently, in normal operation the current (I) flowing through the coil and the voltage (U) dropping across the coil are measured and the external sound pressure (p) on the diaphragm is determined using the magnetic flux density (B), the effective length of the coil in the magnetic field of the magnet, the first transfer function, the second transfer function, the area (A) of the diaphragm, the current (I) measured by the measuring device in normal operation, and the voltage (U) measured by the measuring device in normal operation. The present disclosure further relates to a corresponding loudspeaker assembly.