A voice reception device includes a casing and at least two voice reception units. The casing includes a peripheral side wall, a bottom wall, a containing space formed in an inside of the peripheral side wall and the bottom wall, and a first opening end located at an end of the containing space. The voice reception units are disposed in the containing space. Each of the voice reception units includes a main body, a diaphragm, and a voice guiding channel. The main body has a chamber, and an end of the chamber has a second opening end. The diaphragm is connected to the second opening end of the main body. The voice guiding channel includes an importing end acoustically connected to the chamber and an exporting end opposite to the importing end and acoustically connected to a microphone.

A display apparatus may include a rear cover at a rear surface of a display module and a vibration generating module at a rear region of the rear cover. The vibration generating module may be configured to output sound in a forward direction and a lateral direction of the display module.

A vibration sensor (200) is provided, comprising: a vibration receiver (210) including a housing (211) and a vibration unit (212), the housing (211) forming an acoustic cavity, the vibration unit (212) being located in the acoustic cavity and separating the acoustic cavity into a first acoustic cavity (213) and a second acoustic cavity (214); and an acoustic transducer (220) acoustically connected to the first acoustic cavity (213). The housing (211) is configured to generate a vibration based on an external vibration signal, the vibration unit (212) changes an acoustic pressure within the first acoustic cavity (213) in response to the vibration of the housing (211), causing the acoustic transducer (220) to generate an electrical signal. The vibration unit (212) includes a quality element (2121) and an elastic element (2122), an area of the quality element (2121) on a side away from the acoustic transducer (220) is smaller than an area of the quality element (2121) on a side close to the acoustic transducer. The elastic element (2122) is connected around a side wall of the quality element (2121).

An electronic device includes an enclosure defining a chamber and a first output port communicating the chamber with outside of the enclosure; a loudspeaker module disposed within the chamber. The loudspeaker module includes a first front cavity in communication with the first output port, a second front cavity acoustically connected with an inside space of the enclosure, a rear cavity, a transducer disposed between the first front cavity and the rear cavity, and a first passive radiator disposed between the second front cavity and the rear cavity. The passive radiator is capable of radiating low-frequency sound to the inside space of the enclosure via the second front cavity and an inside port or a second passive radiator. Then, the low-frequency sound re-radiates through surfaces of the enclosure and possible leaks in the enclosure to the outside environment. The low-frequency output is boosted.

An MEMS microphone is provided, comprising a substrate and a vibration diaphragm supported above the substrate by a spacing portion, the substrate, the spacing portion, and the vibration diaphragm enclosing a vacuum chamber, and a static deflection distance of the vibration diaphragm under an atmospheric pressure being less than a distance between the vibration diaphragm and the substrate, wherein: a lower electrode forming a capacitor structure with the vibration diaphragm is provided on the substrate, and an electret layer providing an electric field between the vibration diaphragm and the lower electrode is provided on the substrate

An acoustic protective cover assembly can include a retracted membrane material traversing across an acoustic pathway defined by an opening in a housing. The retracted membrane material can include a fibril structure characterized by serpentine fibrils.

An electro-acoustic transducer includes: a housing; a fixed electrode; a diaphragm that oscillates in accordance with a potential difference between the diaphragm and the fixed electrode generated based on the electric signal, the diaphragm being provided to face the fixed electrode; and a support part that supports the partial region of the diaphragm toward the fixed electrode, the support part including a displacement part that is displaced in a direction in which the diaphragm is displaced in response to a change in pressure inside the housing, and a contacting part contacts the partial region of the diaphragm, wherein a distance between the diaphragm and the fixed electrode in the partial region is less than a distance between the diaphragm and the fixed electrode outside the partial region.

The problem of contaminants entering a microphone assembly through a pressure equalization aperture is mitigated by moving the pressure equalization aperture from a location near the acoustic port to a location on the cover of the microphone assembly. This is achieved by fabricating an aperture reduction structure using a separate dedicated die, with an aperture of diameter ˜25 microns or less disposed on the aperture reduction structure, and then coupling the aperture reduction structure to the cover of the microphone. The relatively smaller aperture on the cover after the coupling of the aperture reduction structure is used for pressure equalization of the back volume of the microphone with a pressure outside of the microphone assembly.

A MEMS microphone and a manufacturing method thereof. The method comprises: sequentially forming a first isolation layer, a diaphragm, and a second isolation layer on a substrate; sequentially forming a first protective layer, a backplate electrode, and a second protective layer on the second isolation layer; forming a release hole penetrating through the first protective layer, the backplate electrode, and the second protective layer; forming an acoustic cavity penetrating through the substrate; releasing the diaphragm through the acoustic cavity and the release hole; and forming a groove on a surface of the first isolation layer, wherein the diaphragm conformally covers the surface of the first isolation layer, thereby forming a spring structure at a position of the groove.

A display apparatus may include a rear cover at a rear surface of a display module and a vibration generating module at a rear region of the rear cover. The vibration generating module may be configured to output sound in a forward direction and a lateral direction of the display module.