Abstract: Provide is a wearable device comprising at least two electrodes and a wearable structure. The at least two electrodes are configured to fit against the skin of a human body to collect an electrocardiogram (ECG) signal of the human body, and the wearable structure is configured to carry the at least two electrodes and fit the at least two electrodes to a waist region of the human body. The at least two electrodes are spaced apart on the wearable structure, and disposed on two sides of a mid-sagittal plane of the human body when the human body wears the wearable structure.

Abstract: Embodiments of the present disclosure provide an acoustic output device including: a transducer configured to generate a mechanical vibration based on an electrical signal, the transducer including a magnetic circuit assembly and a vibration transmission sheet; a housing configured to accommodate the transducer, the housing including a panel and a shell, the magnetic circuit assembly being elastically connected to the housing through the vibration transmission sheet, and the transducer transmitting the mechanical vibration to a user through the panel; and an additional element connected to the magnetic circuit assembly. The additional element is elastically connected to the panel through the magnetic circuit assembly.

Abstract: The embodiments of the present disclosure provide a sensor device. The sensor device comprises a sensitive element and a substrate. The substrate is configured to carry the sensitive element. The sensitive element includes a first conductive layer and a sensitive layer. The first conductive layer includes at least two conductive units. The at least two conductive units are arranged in a distributed manner. At least a portion of the sensitive layer is disposed between and in contact with the at least two conductive units. A resistance value of the sensitive element changes in response to bending of the sensor device.

Abstract: A strain sensor comprising a substrate is provided. The substrate is provided with a groove structure. An electrically conductive film is affixed to a surface of the substrate, and a crack is provided at a position of the electrically conductive film corresponding to the groove structure.

Abstract: The present disclosure relates to an open binaural earphone including a housing, at least one low-frequency speaker, and at least one high-frequency speaker. The housing may be placed on at least one of a head or an ear of a user and not blocking a user's ear canal, and configured to accommodate the at least one low-frequency speaker and the at least one high-frequency speaker. The at least one low-frequency speaker may be configured to output sounds within a first frequency range from at least two first sound guiding holes through at least two first guiding tubes. The at least one high-frequency speaker may be configured to output sounds within a second frequency range from at least two second sound guiding holes through at least two second guiding tubes. The second frequency range may include one or more frequencies higher than one or more frequencies in the first frequency range.

Abstract: 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.

Abstract: A speaker comprises a housing, a transducer residing inside the housing, and at least one sound guiding hole located on the housing. The transducer generates vibrations. The vibrations produce a sound wave inside the housing and cause a leaked sound wave spreading outside the housing from a portion of the housing. The at least one sound guiding hole guides the sound wave inside the housing through the at least one sound guiding hole to an outside of the housing. The guided sound wave interferes with the leaked sound wave in a target region. The interference at a specific frequency relates to a distance between the at least one sound guiding hole and the portion of the housing.

Abstract: The present disclosure provides a wearable device. The wearable device comprises at least two electrodes, configured to be attached to a human skin to collect an electrocardiograph (ECG) signal of a human body; a wearable structure, configured to carry the at least two electrodes and attach the at least two electrodes to two sides of a midsagittal plane of the human body; and a processor, configured to determine a heart rate variability (HRV) of the human body based on the ECG signal, and determine a physical state of the human body based at least on the HRV.

Abstract: The embodiments of the present disclosure provide a conductive structure and a flexible sensor having the same. The conductive structure comprises a substrate, including an accommodation groove; a solid conductor, at least partially accommodated in the accommodation groove, the solid conductor and the accommodation groove forming a first accommodation region; and a fluid conductor, filled in the first accommodation region and extending outside the accommodation groove, a projection of a contact region between the fluid conductor and the solid conductor along a depth direction of the accommodation groove and a projection of the solid conductor along the depth direction having an overlapping region. The flexible sensor comprises at least one sensing structure. Each sensing structure includes two electrode plates; and a dielectric flexible body. The flexible sensor further comprises a processor. Each of the two electrodes includes the conductive structure.

Abstract: One or more embodiments of the present disclosure provide an acoustic output device, comprising a housing; a first loudspeaker disposed in the housing, the first loudspeaker being acoustically coupled with a first hole portion and a second hole portion disposed on the housing, respectively, and the first loudspeaker being driven by a first electrical signal to output a first sound wave and a second sound wave having a phase difference through the first hole portion and the second hole portion, respectively; and a second loudspeaker disposed in the housing, the second loudspeaker being driven by a second electrical signal to output a third sound wave. In a target frequency range, the superposition of the first sound wave, the second sound wave, and the third sound wave generates a directional far-field radiation from the acoustic output device.

Abstract: An acoustic output device is provided. The acoustic output device includes a sound generation component, a support member, and a sensor. The sound generation component is configured to accommodate a sound generation unit that produces sound. The support member is configured to dispose the sound generation component near an ear without blocking an earhole. The sensor includes at least one ultrasonic transducer disposed inside the sound generation component. The sensor is configured to transmit a first ultrasonic signal to an outside of the sound generation component through the at least one ultrasonic transducer. The transducer is further configured to detect the second ultrasonic signal through the at least one ultrasonic transducer and determine a wearing state of the acoustic output device based on the detection. The second ultrasonic signal includes the first ultrasonic signal or a reflection signal of the first ultrasonic signal.

Abstract: Embodiments of the present disclosure provide an acoustic output device comprising a transducer device configured to generate a mechanical vibration based on an electrical signal, the transducer device including a magnetic circuit assembly and an elastic support component; a housing configured to accommodate the transducer device, wherein the housing includes a panel and a shell, the transducer device transmitting the mechanical vibration to a user through the panel; and an additional element connected to the panel through a vibration path, the vibration path at least including an elastic element, the additional element being located at a sidewall of the shell adjacent to the panel, and the elastic support component connecting the magnetic circuit assembly and the sidewall disposed with the additional element.

Abstract: An acoustic output device comprises a housing, a first loudspeaker and a second loudspeaker disposed in the housing. The first loudspeaker includes a first diaphragm. In the housing, a first front cavity and a first rear cavity are respectively disposed on a front side and a rear side of the first diaphragm, and the first front cavity and the first rear cavity are acoustically coupled with two hole portions disposed on the housing, respectively, to output a first sound wave and a second sound wave. The second loudspeaker includes a second diaphragm. In the housing, a second front cavity and a second rear cavity are respectively disposed on a front side and a rear side of the second diaphragm, and only one of the second front cavity and the second rear cavity is acoustically coupled with a hole portion disposed on the housing to output a third sound wave.

Abstract: Embodiments of the present disclosure provide an acoustic output device including: a transducer configured to generate a mechanical vibration based on an electrical signal; a housing configured to accommodate the transducer, the housing including a panel and a shell, the transducer being connected to the panel, and the transducer transmitting the mechanical vibration to a user through the panel; and an additional element elastically connected to the panel through a vibration path at least including one elastic element.

Abstract: The present disclosure may provide a sound-producing device comprising a diaphragm and a housing. The housing may include a first sound guide hole and a second sound guide hole. The diaphragm may be disposed in the housing. When a user wears the sound-producing device, a distance between the first sound guide hole and the ear canal opening may be smaller than a distance between the diaphragm and the ear canal opening, a range of an included angle between a connection line between the first sound guide hole and the second sound guide hole and a connection line between the center of mass of the diaphragm and the ear canal opening may be smaller than 45°, and a distance between the second sound guide hole and the ear canal opening may be greater than the distance between the diaphragm and the ear canal opening.

Abstract: A system for reducing noise for a user includes a first detector configured to generate a first noise signal, wherein the first noise signal is a representation of a first noise that is transmitted to the user through a first sound pathway, and a second detector configured to generate a second noise signal, wherein the second noise signal indicates a second noise perceived by the user. The system also includes a processor configured to determine a noise correction signal based on the first noise signal and/or the second noise signal, and a speaker configured to generate a sound for reducing the noise based on the noise correction signal.

Abstract: The present disclosure provides an acoustic device including a microphone array, a processor, and at least one speaker. The microphone array may be configured to acquire an environmental noise. The processor may be configured to estimate a sound field at a target spatial position using the microphone array. The target spatial position may be closer to an ear canal of a user than each microphone in the microphone array. The processor may be configured to generate a noise reduction signal based on the environmental noise and the sound field estimation of the target spatial position. The at least one speaker may be configured to output a target signal based on the noise reduction signal. The target signal may be used to reduce the environmental noise. The microphone array may be arranged in a target area to minimize an interference signal from the at least one speaker to the microphone array.

Abstract: The embodiments of the present disclosure disclose a system and method. The system may include at least one storage device configured to storage computer instruction; and at least one processor, in communication with the storage device. When executing the computer instructions, the at least one processor is configured to direct the system to perform operations including: obtaining a sensing signal of at least one sensing device; identifying a signal feature of the sensing signal; and determining, based on the signal feature, an operation of a target object associated with the at least one sensing device.

Abstract: The present disclosure relates to an acoustic output apparatus. The acoustic output apparatus comprising: at least one low-frequency acoustic driver that outputs sound from at least two first sound guiding holes; at least one high-frequency acoustic driver that outputs sound from at least two second sound guiding holes; and a controller configured to cause the low-frequency acoustic driver to output sound in a first frequency range, and cause the high-frequency acoustic driver to output sound in a second frequency range, wherein the second frequency range includes frequencies higher than the first frequency range.

Abstract: Embodiments of the present disclosure provide an acoustic output device comprising a bone conduction sound generation unit and a piezoelectric sound generation unit. The bone conduction sound generation unit is configured to generate bone conduction sound waves that are transmitted to human ears via bone and have at least one resonance peak in a frequency range not higher than 1 kHz. The piezoelectric sound generation unit is configured to generate sound waves that have at least one resonance peak in a range not lower than 6 kHz.