Abstract: This present disclosure provides an acoustic device. The acoustic device includes a housing, one or more sound pickup assemblies, and one or more channel assemblies. The housing has an accommodating space and one or more communication holes. Each communication hole communicates the accommodating space and an outside space. The one or more sound pickup assemblies may be disposed in the accommodating space for picking up a sound through the communication holes. The one or more channel assemblies may be disposed in the accommodating space. At least one of the one or more channel assemblies is disposed between one sound pickup assembly of the one or more pickup assemblies and one communication hole of the one or more communication holes, so that the sound is transmitted to the sound pickup assembly through the at least one of the one or more channel assemblies after passing through the communication hole.

Abstract: The present disclosure discloses an assistive listening device. The assistive listening device includes a signal input module configured to receive an initial sound and convert the initial sound into an electric signal, a signal processing module configured to process the electric signal and generate a control signal, and at least one output energy converter configured to convert the control signal into a bone conduction sound wave that can be perceived by a user and an air conduction sound wave that can be heard by the user's ears. Within a target frequency range, the air conduction sound wave is transmitted to the user's ears, so that a sound intensity of the air conduction sound heard by the user's ears is greater than a sound intensity of the initial sound received by the signal input module.

Abstract: The present disclosure provides methods and systems for detecting the state of a bone conduction hearing device. The bone conduction hearing device comprises at least a microphone, a speaker, a feedback analysis unit, and a signal processing unit. The speaker may generate a third sound based on a first signal, wherein the first signal may be generated by the signal processing unit. The microphone may receive the third sound and generate a feedback signal. The feedback analysis unit may determine a feedback path transfer function from the speaker to the microphone based on the feedback signal and the first signal, obtain at least one preset feedback path transfer function, and compare the feedback path transfer function and the at least one preset feedback path transfer function. The signal processing unit may determine the state of the bone conduction hearing device based on a comparison result.

Abstract: A biomimetic tower climbing robot and a tower climbing method thereof are provided. The robot mainly includes a main control body module and clamping and moving mechanism modules; two ends of the main control body module are connected to one clamping and moving mechanism module through an elastic universal joint respectively, two clamping and moving mechanism modules can alternately lock and unlock an anti-fall track of an iron tower, and the main control body module alternately pushes the clamping and moving mechanism module at its upper end upwards and pulls the clamping and moving mechanism module at its lower end upwards to achieve climbing of the robot along the anti-fall track.

Abstract: A biomimetic tower climbing robot and a tower climbing method thereof are provided. The robot mainly includes a main control body module and clamping and moving mechanism modules; two ends of the main control body module are connected to one clamping and moving mechanism module through an elastic universal joint respectively, two clamping and moving mechanism modules can alternately lock and unlock an anti-fall track of an iron tower, and the main control body module alternately pushes the clamping and moving mechanism module at its upper end upwards and pulls the clamping and moving mechanism module at its lower end upwards to achieve climbing of the robot along the anti-fall track.

Abstract: The present disclosure provides systems for controlling signal transmission. The system may include a first direct memory access (DMA) controller, a processor, and a second DMA controller: The first DMA controller may be configured to write a signal to a first storage space to form first data. The processor may be configured to process the first data in batches and transmit the processed first data to a second storage space to form second data. The second DMA controller may be configured to sequentially read the second data from an address of the second storage space. When each batch of first data is written to the second storage space, a data reading address of the second DMA controller in the second storage space may point to an address before an address where the first data is written.

Abstract: A live flaw detection system for a multi-bundled conductor splicing sleeve and an application method thereof are disclosed. The system includes an upper apparatus and a lower apparatus, where the upper apparatus includes an unmanned aerial vehicle and an industrial X-ray machine, and a laser sensor, and the lower apparatus includes a press plate frame apparatus, vertical screw slide table modules, a horizontal screw slide table module, a projection imager, and a linear retractable apparatus. The unmanned aerial vehicle functions as a power apparatus that controls the system to be online or offline, the industrial X-ray machine is configured to perform ray flaw detection on each splicing sleeve, the laser sensor is configured to guide the unmanned aerial vehicle to land the lower apparatus on splicing sleeves accurately, and the press plate frame apparatus is configured to fixedly clamp the splicing sleeves.

Abstract: Disclosed is methods and systems for configuring bone conduction hearing aids. The method may comprise: obtaining hearing loss data of a wearer; determining a reference output parameter of the bone conduction hearing aid at each sound level in each frequency band based on the hearing loss data; obtaining an adjustment value of the reference output parameter at the each sound level in the each frequency band, wherein the adjustment value is at least related to the frequency band; and configuring the bone conduction hearing aid based on the reference output parameter and the adjustment value at the each sound level in the each frequency band.

Abstract: A live flaw detection system for a multi-bundled conductor splicing sleeve and an application method thereof are disclosed. The system includes an upper apparatus and a lower apparatus, where the upper apparatus includes an unmanned aerial vehicle and an industrial X-ray machine, and a laser sensor, and the lower apparatus includes a press plate frame apparatus, vertical screw slide table modules, a horizontal screw slide table module, a projection imager, and a linear retractable apparatus. The unmanned aerial vehicle functions as a power apparatus that controls the system to be online or offline, the industrial X-ray machine is configured to perform ray flaw detection on each splicing sleeve, the laser sensor is configured to guide the unmanned aerial vehicle to land the lower apparatus on splicing sleeves accurately, and the press plate frame apparatus is configured to fixedly clamp the splicing sleeves.

Abstract: This present disclosure provides an acoustic device. The acoustic device includes a housing, one or more sound pickup assemblies, and one or more channel assemblies. The housing has an accommodating space and one or more communication holes. Each communication hole communicates the accommodating space and an outside space. The one or more sound pickup assemblies may be disposed in the accommodating space for picking up a sound through the communication holes. The one or more channel assemblies may be disposed in the accommodating space. At least one of the one or more channel assemblies is disposed between one sound pickup assembly of the one or more pickup assemblies and one communication hole of the one or more communication holes, so that the sound is transmitted to the sound pickup assembly through the at least one of the one or more channel assemblies after passing through the communication hole.

Abstract: The present disclosure provides a method for obtaining a vibration transfer function from a sound generation unit to other positions. The method comprises: generating a first sound and a second sound based on a first test audio signal and a second test audio signal; outputting a first feedback signal after receiving the first sound, the first feedback signal including a signal transmitted from a sound generation unit to a first position through vibration transmission path and air conduction transmission path; outputting a second feedback signal after receiving the second sound, the second feedback signal including a signal transmitted from the sound generation unit to a second position through air conduction transmission path; determining the vibration transfer function from the sound generation unit to the first position based on the first test audio signal, the second test audio signal, the first feedback signal, and the second feedback signal.

Abstract: The present disclosure discloses an assistive listening device. The assistive listening device includes a signal input module configured to receive an initial sound and convert the initial sound into an electric signal, a signal processing module configured to process the electric signal and generate a control signal, and at least one output energy converter configured to convert the control signal into a bone conduction sound wave that can be perceived by a user and an air conduction sound wave that can be heard by the user's ears. Within a target frequency range, the air conduction sound wave is transmitted to the user's ears, so that a sound intensity of the air conduction sound heard by the user's ears is greater than a sound intensity of the initial sound received by the signal input module.

Abstract: The present disclosure provides methods and systems for detecting the state of a bone conduction hearing device. The bone conduction hearing device comprises at least a microphone, a speaker, a feedback analysis unit, and a signal processing unit. The speaker may generate a third sound based on a first signal, wherein the first signal may be generated by the signal processing unit. The microphone may receive the third sound and generate a feedback signal. The feedback analysis unit may determine a feedback path transfer function from the speaker to the microphone based on the feedback signal and the first signal, obtain at least one preset feedback path transfer function, and compare the feedback path transfer function and the at least one preset feedback path transfer function. The signal processing unit may determine the state of the bone conduction hearing device based on a comparison result.

Abstract: Provided is an apparatus for detecting property of fuel in a construction machine, with use of a sub-tank, the apparatus being capable of minimizing an influence on the detection given by water contained in fuel. The apparatus includes a sub-tank between an engine and a fuel tank of the construction machine, a fuel introducing pipe through which fuel is introduced to the sub-tank from the fuel tank, a fuel discharger through which fuel in the sub-tank is discharged to the engine, and a sensor. The sub-tank has a bottom section having a bottom fuel outlet for discharging fuel from the bottom section. The fuel discharger includes a bottom fuel discharging pipe connected to the bottom fuel outlet.

Abstract: This invention relates to a motor vehicle protector against car intrusion into its bottom. It mainly comprises two stationary frames (i.e., steady rests), two pendant arms (i.e., pending arms) and a pipe frame, wherein the upper end of the pendant arms is connected to the rear end of the stationary frame while the pipe frame is connected at the lower and rear side of the two pendant arms. The pipe frame is composed of an upper horizontal annular pipe, a lower horizontal annular pipe, a plurality of upright pipes, and multi-group piling pipes. Additionally, an warning alarm is provided at the rear end of the upper horizontal annular pipe, and a strip front fender is fixed at the internal side of the upright pipe and the lower horizontal annular pipe.