8results about How to "Reduce noise intensity" patented technology

This invention discloses an intelligent aging cabinet for an automatic aging system in the audio industry, relating to the field of aging equipment technology. The aging cabinet body has an inlet and an outlet on opposite sides. A first and second isolating component intermittently unblocks either the inlet or outlet. During the process from when the audio product enters the aging station to when the aging cabinet body outputs the audio product that has completed the aging test, at least one of the first and second isolating components, together with the aging cabinet body, isolates the internal environment of the aging cabinet body from the external environment. This reduces noise pollution to the surrounding environment. Thus, while some audio products are still undergoing aging tests inside the aging cabinet, some audio products that have completed the aging test can be output from the aging cabinet body, while simultaneously inputting some audio products awaiting aging tests into the aging cabinet body. This shortens the waiting time for inputting and outputting audio products, resulting in higher overall efficiency when aging tests are performed on batches of audio products.

The utility model relates to dust removal pipeline noise reduction technical field, especially the noise reduction muffler of dust removal pipe and pipeline dust outlet joint, including the sound elimination casing and the sound elimination baffle, the sound elimination casing cover is equipped with the dust outlet on the pipeline and is connected with the pipeline, and the dust removal pipe dust suction end passes through the through -hole in the top of sound elimination casing and extends to the dust outlet on the pipeline, and the dust removal pipe dust suction end and the inner wall between the dust outlet limit the air supplement mouth, the sound elimination baffle surrounds in the air supplement mouth, the air supplement mouth and the inside of sound elimination casing intercommunication, and a plurality of layers sound elimination baffle stack in the inside of sound elimination casing, and all are equipped with the air guide hole on every layer sound elimination baffle, and the adjacent air guide hole between adjacent two layers sound elimination baffle is misaligned and is arranged, and the sidewall of sound elimination casing close to the highest layer sound elimination baffle is equipped with the air inlet, to solve the problem of the excessive noise of dust removal pipe and pipeline dust outlet joint.

The utility model relates to machine room noise reduction technical field especially, relates to a kind of natural gas compressor room automatic ventilation noise reduction system, comprising: high-performance soundproof door, composite sound absorption and sound insulation body, exhaust device and electric control device;High-performance soundproof door is rotatably connected with the lateral wall of machine room, composite sound absorption and sound insulation body is set around the wall of machine room, composite sound absorption and sound insulation body are formed by multiple sound insulation layers composite, for reducing the noise inside machine room;Exhaust device includes exhaust fan assembly and exhaust silencer assembly, exhaust fan assembly is fixedly arranged on the wall of machine room, electric control device is set on the wall of the side of high-performance soundproof door, and the control end of electric control device is connected with exhaust fan assembly and exhaust silencer assembly respectively.The metal door commonly used in machine room is replaced by high-performance soundproof door, effectively reduce the noise from inside machine room to the environment outside, and the composite sound absorption and sound insulation body set on the lateral wall of machine room, can absorb the main reverberation sound in room, reduce the noise intensity in room.

This invention provides an electronic device for housing a buck-boost circuit, comprising a housing, a circuit board, and a plurality of noise-canceling capacitors. The circuit board is disposed within the housing and is used to house the buck-boost circuit. The circuit board has a power layer. The power layer has a plurality of power through-layer portions. The noise-canceling capacitors are disposed on at least one side of the power layer. At least some of the noise-canceling capacitors are located near these power through-layer portions. At least another portion of the noise-canceling capacitors are located away from these power through-layer portions. Among the noise-canceling capacitors located away from these power through-layer portions, the spacing between any two adjacent noise-canceling capacitors is less than or equal to one-eighth of the wavelength of the noise generated by the buck-boost chip. The solution provided by this invention can effectively reduce the noise intensity in electronic devices.

The utility model relates to a fan device and vertical face cleaning equipment. The fan device comprises a shell, a driving mechanism, an impeller assembly and a turbulent flow part. A containing cavity and a spiral air duct arranged around the periphery of the containing cavity are formed in the shell, and the spiral air duct is constructed to be communicated with the air inlet side and the air outlet side of the fan device; the driving mechanism is arranged in the accommodating cavity; the impeller assembly is in transmission connection with the driving mechanism, and the impeller assembly is driven by the driving mechanism to rotate, so that external airflow flows from the air inlet side to the air outlet side through the spiral air duct; the turbulent flow part is arranged in the spiral air channel and disturbs airflow flowing through the spiral air channel. By arranging the spiral air duct, the airflow exhaust path is greatly prolonged, and the turbulent flow part is arranged in the spiral air duct, so that airflow in the spiral air duct can be disturbed, sound wave energy is partially consumed before reaching the outlet, and the noise reduction effect can be achieved.

The application belongs to the technical field of data security, and relates to a multi-modal data cross-domain security evidence chain construction system based on federated learning, which comprises the following modules: a multi-modal data acquisition and feature mapping module, which generates cross-modal shared hidden space feature vectors and cross-modal mutual information entropy characteristic values; a gradient calculation and adaptive encryption module, which aggregates to generate encrypted gradient ciphertext blocks; a homomorphic aggregation and blockchain beacon generation module, which generates a global smart contract beacon; a dynamic token generation and analysis module, which aggregates and encapsulates to generate a dynamic retrieval token; a knowledge graph connection decision and construction module, which generates a multi-modal evidence chain knowledge graph network; and an evidence chain compensation and traceability output module, which aggregates to generate a cross-domain security evidence chain. The application solves the problem of high computational delay defects caused by static high-intensity encryption and complex consensus verification in the existing cross-platform privacy collaboration mechanism, which leads to the problem of being unable to balance the dynamic balance between privacy protection strength and system real-time processing efficiency.

The application relates to the technical field of pipeline flow metering equipment, and discloses a pipeline noise reduction rectifying device and a pipeline flow metering system. The pipeline noise reduction rectifying device comprises a shell, an air inlet arranged at the front end of the shell, and an air outlet arranged at the rear end of the shell. The shell comprises a diameter expansion part and a steady flow noise reduction part arranged in sequence from front to rear. The inner diameter of the diameter expansion part gradually increases from the air inlet to the downstream. The inner diameter of the steady flow noise reduction part is greater than that of the air inlet. A front rectifying net is arranged on one side of the steady flow noise reduction part close to the air inlet. A steady flow ball is fixedly arranged on the steady flow noise reduction part and located on the rear side of the front rectifying net. The rear end of the steady flow ball is opposite to the air outlet. The pipeline noise reduction rectifying device can perform noise reduction and rectification on the airflow in the pipeline, create a stable measurement environment for the ultrasonic flow meter on the pipeline, and indirectly improve the measurement accuracy of the flow.

The utility model discloses a kind of noise reduction type motors, the noise reduction type motor, including motor body and bottom plate, further include: soundproof box, installation groove is opened in the bottom plate, multiple fixed blocks are arranged in installation groove inside, support rod is arranged on fixed block, movable block is sleeved in the top end of support rod, multiple movable block is arranged with soundproof box between, motor body is placed in the soundproof box, slide rail is arranged in the soundproof box, slide block is arranged in the inside of two slide rails, clamping plate is arranged between two slide blocks;Noise reduction type motor is composed of motor body, soundproof box and protective box, protective box is connected with soundproof box by descending, forms the protective cover of cover being arranged in the outside of motor body, can absorb the noise emitted by motor body, motor body will drive protective cover to vibrate up and down when high-speed operation, buffering mechanism buffers and shock-absorbs protective box and soundproof box, ensure the normal use of motor.