4results 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 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 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.