Abstract: An energy storage device and a method thereof are provided. The power transfer circuit transfers a DC voltage provided by a battery module into an AC output voltage to provide the AC output voltage to an output end of the power transfer circuit for providing power to a load. When the AC output voltage is at a default phase, the power transfer circuit is disabled in a default period, and whether the energy storage device may be shut down is determined according to a voltage difference of the AC output voltage sensed by a sensing circuit during the default period.

Abstract: A headset device and a control method thereof are provided. The headset device includes a head beam, a headset, a sensing circuit, a determination circuit, and a microcontroller. The headset is joined to an end portion of the head beam. The sensing circuit is disposed at the head beam. The sensing circuit provides a sensing value corresponding to a stretch change of the head beam according to the stretch change of the head beam. The determination circuit compares the sensing value with a first reference value to generate a first determination signal and compares the sensing value with a second reference value to generate a second determination signal. The microcontroller controls the headset to enter one of a turned-on state and a turned-off state according to the first determination signal and the second determination signal.

Abstract: A directional microelectromechanical systems (MEMS) microphone, including a first layer, a second layer, and a third layer stacked in sequence and multiple adhesive members formed between the first layer, the second layer, and the third layer, is provided. The adhesive members include an outer adhesive member disposed surrounding a periphery of the first layer, the second layer, and the third layer and an inner adhesive member disposed within a range surrounded by the outer adhesive member. The outer adhesive member and the inner adhesive member form at least two slits between the first layer, the second layer, and the third layer. An external sound is transmitted to a sound sensing element after passing through two receiving holes of the directional MEMS microphone respectively along two paths. One of the two paths passes through the at least two slits.

Abstract: An Internet of Things (IoT) system includes a plurality of terminal devices, a cloud device and a human machine interface (HMI) device. The cloud device is communicatively connected to the terminal devices. The human machine interface (HMI) device is communicatively connected to the terminal devices via a plurality of first communication channels, and communicatively connected to the cloud device via a first dedicated communication channel. The HMI device determines a subscription sequence according to priority information of a plurality of control commands, and schedules and dynamically subscribes to the first communication channels according to the subscription sequence. The HMI device respectively determines whether the terminal devices are adjacent to the HMI device, and transmits switch transmission mode request messages corresponding to the terminal devices adjacent to the HMI device to the cloud device via the first dedicated communication channel.

Abstract: A headphone includes a headgear and two earmuffs connected to opposite ends of the headgear, and each of the earmuffs includes an adjustment assembly. The adjustment assembly includes a base, two elastic members, two protrusions, and two sliding blocks. The base has two opposite accommodating parts and two guiding grooves. The elastic members are disposed in the accommodating parts, respectively, and the elastic members extend along a first axial direction. The protrusions are slidably connected to the guiding grooves, respectively, and protrude into the accommodating parts. The sliding blocks are disposed in the accommodating parts, respectively, and each of the sliding blocks is respectively connected between the corresponding protrusion and the corresponding elastic member.

Abstract: A speaker includes a frame, a magnetic circuit system, a balance element, and a diaphragm. The frame has a perforation, a bearing surface, and an accommodating space surrounding the perforation. The magnetic circuit system is disposed in the accommodating space and includes a voice coil and a magnet, and the voice coil is located between the bearing surface and the magnet. The diaphragm has a hole corresponding to the perforation, and the diaphragm is connected to the frame and the voice coil. The balance element is disposed in the accommodating space and surrounds the perforation, and the balance element is connected to the voice coil and the bearing surface.

Abstract: A speaker includes a frame, a magnetic circuit system setting section, a magnetic circuit system and a balance element. The frame has a first surface. The magnetic circuit system setting section is formed on the first surface of the frame, the magnetic circuit system setting section includes a first region and a second region, and the second region surrounds the first region. The magnetic circuit system is arranged in the magnetic circuit system setting section, and includes a voice coil. The voice coil has a first end facing the first surface and located in the second region. The balance element is connected to the first surface and the first end.

Abstract: An electronic device including a substrate, a sensor, a partition wall structure, a pressurizing component, and a stopping structure is provided. The substrate has a carrying surface. The sensor is disposed on the carrying surface. The partition wall structure is disposed on the carrying surface and surrounds the sensor. The pressurizing component is disposed on the partition wall structure. The pressurizing component, the partition wall structure, and the substrate jointly form a cavity, and the pressurizing component includes a mass and a vibration membrane. The stopping structure is disposed between the pressurizing component and the partition wall structure and extends into the cavity. The stopping structure has at least one opening penetrating the stopping structure.

Abstract: A microphone front chamber structure is adapted to be disposed on a front side of a voice reception hole of a microphone unit. The microphone front chamber structure includes a shell and a microphone holder. The shell has a first hole. The microphone holder is disposed in the shell and has a second hole corresponding to the first hole. The first hole and the second hole form a front chamber. The first hole has a first width at a position farthest away from the microphone holder. The second hole includes first and second sections arranged along an axis. On the axis, the first section has a tapered width along the axis and away from the shell. The second section has a second width constant along the axis. The first width is greater than the second width. A voice reception device including the microphone front chamber structure is also provided.

Abstract: A microphone front chamber structure is adapted to be disposed on a front side of a voice reception hole of a microphone unit. The microphone front chamber structure includes a shell and a microphone holder. The shell has a first hole. The microphone holder is disposed in the shell and has a second hole corresponding to the first hole. The first hole and the second hole form a front chamber. The first hole has a first width at a position farthest away from the microphone holder. The second hole includes first and second sections arranged along an axis. On the axis, the first section has a tapered width along the axis and away from the shell. The second section has a second width constant along the axis. The first width is greater than the second width. A voice reception device including the microphone front chamber structure is also provided.

Abstract: A speaker includes a frame, a magnetic circuit system, a balance element, and a diaphragm. The frame has a perforation, a bearing surface, and an accommodating space surrounding the perforation. The magnetic circuit system is disposed in the accommodating space and includes a voice coil and a magnet, and the voice coil is located between the bearing surface and the magnet. The diaphragm has a hole corresponding to the perforation, and the diaphragm is connected to the frame and the voice coil. The balance element is disposed in the accommodating space and surrounds the perforation, and the balance element is connected to the voice coil and the bearing surface.

Abstract: A headphone includes a headgear and two earmuffs connected to opposite ends of the headgear, and each of the earmuffs includes an adjustment assembly. The adjustment assembly includes a base, two elastic members, two protrusions, and two sliding blocks. The base has two opposite accommodating parts and two guiding grooves. The elastic members are disposed in the accommodating parts, respectively, and the elastic members extend along a first axial direction. The protrusions are slidably connected to the guiding grooves, respectively, and protrude into the accommodating parts. The sliding blocks are disposed in the accommodating parts, respectively, and each of the sliding blocks is respectively connected between the corresponding protrusion and the corresponding elastic member.

Abstract: An earbud, including a housing, a speaker assembly, and a partition, is provided. The housing includes a sound outlet hole and a sound tuning hole, wherein the sound outlet hole is in acoustic communication with an ear canal of a human ear but does not contact the ear canal. The speaker assembly is disposed in the housing to separate a space in the housing into a front cavity and a rear cavity. The partition is disposed in the front cavity of the housing to divide the front cavity into a first area close to the speaker assembly and a second area away from the speaker assembly. The partition is between the first area and the second area, and the partition has a thickness and includes multiple first through holes, wherein the first through holes pass through the partition to connect the first area with the second area.

Abstract: A micro-electromechanical packaging structure including a substrate, a sensing module, a waterproof layer, and a cover is provided. The substrate has a first surface, a second surface, and an acoustic hole penetrating through the first surface and the second surface. The acoustic hole has an upper opening and a lower opening, and an aperture of the lower opening is larger than an aperture of the upper opening. The sensing module is disposed on the first surface of the substrate and covers the upper opening. The waterproof layer is disposed on the second surface of the substrate and covers the lower opening. The waterproof layer has multiple fine holes. The fine holes are communicated with the acoustic hole. The cover is disposed on the first surface and covers the sensing module.

Abstract: An earmuff module of a headphone includes a back cover, a sound-receiving hole, a microphone assembly, and an earmuff. The back cover includes a peripheral side wall. The sound-receiving hole is formed on the peripheral side wall of the back cover and penetrates through the peripheral side wall. The microphone assembly is disposed on an inner surface of the peripheral side wall and corresponds to the sound-receiving hole, and is acoustically connected with the sound-receiving hole. The earmuff is detachably assembled on the back cover, and the earmuff includes a foam and a wrapping cover. The wrapping cover includes an extension part and a covering part. The covering part covers the foam. The extension part extends from one end of the covering part to an outer surface of the peripheral side wall and covers the sound-receiving hole. The microphone assembly is located within a range covered by the extension part.

Abstract: A moving-coil speaker includes a frame, magnetic circuit system setting section, and magnetic circuit system. The frame has a first surface. The magnetic circuit system setting section is formed on the first surface and includes a first region and a second region surrounding the first region. The magnetic circuit system is disposed at the magnetic circuit system setting section and includes at least one voice coil which spaced from the first surface of the frame and having a first end and a second end opposite to the first end. The first end defines a virtual plane extending along a radial direction of the voice coil. The virtual plane and the first surface of the first region define a first distance. The virtual plane and the first surface of the second region define a second distance. The second distance is greater than the first distance, and the second distance and the first distance are parallel.

Abstract: The disclosure provides an application page navigation method and a terminal device. The method includes: obtaining a page navigation relationship diagram; in response to detecting a page navigation request for navigating to a second function page when a first function page is displayed, obtaining a first dimension corresponding to the first function page and a second dimension corresponding to second function page; and determining a page navigation mode corresponding to the page navigation request based on a comparison result of the first dimension and the second dimension.

Abstract: A micro-electro mechanical device includes a casing, a vibration sensor, a vibration membrane assembly, and a micro-electro mechanical microphone. The casing has a sound-receiving hole, and the vibration sensor is disposed in the casing. The vibration membrane assembly is disposed in the casing and corresponds to the vibration sensor. The micro-electro mechanical microphone is disposed in the casing and corresponds to the sound-receiving hole, and a back cavity of the micro-electro mechanical microphone is formed in the casing. The back cavity at least partially overlaps with areas corresponding to a vertical projection of the vibration membrane assembly.

Abstract: An earphone with a circuit board module includes a casing, a speaker, and a circuit board module. The casing includes a back cover and has an accommodation space inside. The speaker is disposed in the accommodation space, and a first chamber is defined between the speaker and the back cover. The circuit board module is disposed in the first chamber and includes a first circuit board having a first surface, a second circuit board having a second surface, and a first flexible connector. The first surface faces and is spaced apart from the second surface of the second circuit board. The first flexible connector includes a first end connected to the first circuit board, a second end which is opposite to the first end and connected to the second circuit board, and a connection segment which connects the first and second ends and is shaped as a letter U.

Abstract: An in-ear earphone, including a casing, a speaker, and an attenuation guide, is provided. The casing includes a sound outlet and a first through hole. An inside of the casing has a first accommodating space. The speaker is disposed in the first accommodating space. The casing defines a front cavity and a rear cavity by the speaker. The attenuation guide is formed in the casing and includes at least a first attenuation channel and a second attenuation channel. The first attenuation channel has a first inlet and a first outlet. The first inlet is connected to the first through hole. The second attenuation channel has a second inlet and a second outlet. The second inlet, the first outlet, and the rear cavity are acoustically connected, and the second outlet is connected to the front cavity.