849 results about "Wind noise" patented technology

A system for breakage early warning of high-voltage transmission lines based on acoustic prints, including a data acquisition unit, an edge processing unit, a cloud server, a warning execution unit, and a communication unit. The data acquisition unit is configured to collect environmental information of a high-voltage transmission tower in real time through a multimodal sensing device. The edge processing unit includes an adaptive filtering module configured to eliminate wind noise interference in the environmental information and compensate for frequency response deviation. The cloud server can generate a warning instruction based on the environmental information. The warning execution unit can perform warning and alarming actions based on the warning instruction. The communication unit is configured to enable data and information transmission among the units. A method implemented by such system is also provided.

The invention discloses a fan blade diagnosis method and system based on voiceprint perception, and relates to the technical field of intelligent monitoring of wind power equipment, and the method comprises the steps: carrying out frequency domain compensation processing, stripping environment wind noise components, and generating a pure voiceprint signal based on a wind flow characteristic parameter set; based on the pure voiceprint signal, identifying a sensitive acoustic frequency band of the fan blade, exciting a sound wave phase synergistic effect in the sensitive acoustic frequency band, and generating an enhanced voiceprint signal; quantifying the internal damage depth of the fan blade material according to the enhanced voiceprint signal, and calculating a sound energy flow disorder degree index; according to the sound energy flow disorder degree index, the blade health state of the fan is judged through a multi-dimensional acoustic characteristic state space mapping mechanism, and a three-dimensional health assessment report is generated; through a physical level wind noise stripping technology, a transfer function matrix is generated based on vortex interference modeling and sound wave-airflow phase offset correction, frequency domain energy reweighted decoupling is realized, and environmental wind noise is accurately stripped in a strong turbulence environment.

The invention relates to the technical field of active noise reduction of ventilation pipelines, in particular to an active noise reduction ventilation device and method powered by solar energy. The active noise reduction assembly comprises a noise acquisition assembly, a noise reduction controller and a noise reduction microphone; the passive noise reduction assembly comprises a fan and blades; the control mechanism comprises a rotating shaft, a solar assembly and a sound insulation layer, the passive noise reduction state and the active noise reduction state of the fan are automatically adjusted through the rotating shaft according to the air inlet amount of the ventilation pipeline, and the control mechanism adapts to various application scenes, does not need manual switching, is simple and convenient, automatically adjusts the air inlet amount of the filter screen and assists in scraping dust filtered by the surface layer of the sound insulation layer. The motion state of the rotating shaft is automatically adjusted according to the air inlet amount and the wind noise, meanwhile, solar assembly power generation and wind power generation of the fan are switched, and normal work of the active noise reduction assembly is guaranteed.

The invention relates to the technical field of voice recognition control, and discloses a voice recognition control method and system for an electric two-wheeled vehicle, and the method comprises the steps: carrying out the synchronous data collection of a three-axis wind sensor, a vehicle speed sensor, a six-axis attitude sensor and a stereo microphone array of the electric two-wheeled vehicle, obtaining a multi-source data set and an original voice signal; performing coordinate system conversion and vehicle body aerodynamic calculation on the multi-source data set to obtain a wind field intensity distribution matrix; performing asymmetric differential compensation on the original voice signal based on the wind field intensity distribution matrix to obtain a compensated voice signal; and performing dynamic wind noise suppression processing and voice recognition on the compensated voice signal to generate a target voice recognition result, thereby ensuring the voice recognition reliability under different wind direction interference intensities, and effectively improving the recognition precision and the response speed.

A vehicle comprising having a vehicle body including a lower side, a rear quarter window and a rear spoiler garnish, the vehicle defining an inner passenger compartment; a D-pillar garnish configured to be mounted on the vehicle body between the rear spoiler garnish and the lower side of the vehicle, the D-pillar garnish including an outer garnish body having a first predetermined curvature portion; and an inner garnish body. The rear spoiler garnish includes an outer rear spoiler garnish and an inner rear spoiler garnish, the inner rear spoiler garnish having a second predetermined curvature portion. A gap is defined between a rear edge of the outer garnish body and a lower edge of the rear spoiler garnish, and the first predetermined curvature portion and the second predetermined curvature portion defining a convoluted flow path through the gap.

The utility model provides an earphone, and relates to the technical field of audio equipment. The earphone comprises a main body part, an extension part and a sound production part which are connected in sequence, the earphone further comprises a shell, and the shell is provided with a first pickup hole and a first microphone cavity. The first microphone is arranged in a first microphone cavity of the shell, the first pickup hole is communicated with the first microphone cavity, so that the outside of the shell can be communicated with the first microphone cavity, sound waves outside the shell can enter the first microphone cavity through the first pickup hole, and the sound waves can be received by the first microphone and converted into electric signals. The first pickup hole is opposite to at least part of the area of the side, facing the auricular conchae, of the tragus, so that at least part of the tragus can shield the first pickup hole, and therefore, when a user faces the wind, the tragus can prevent wind noise waves from entering the first pickup hole to a certain extent, and the wind noise generated when the earphone is used is reduced.

The present invention provides an electronic device for reducing wind noise and its application. The raw materials of the porous block material include zeolite, adhesive and dispersant. The present invention also provides an electronic device comprising the above-mentioned porous block material. The present invention further provides an electronic device for reducing wind noise, including a body, an arc cover and a PCB board, the two ends of the body are respectively connected to the PCB board and the arc cover, the body is provided with an inner sound channel along the central axis, the arc cover is provided with an outer sound channel, the outer sound channel is in a windmill-shaped structure as a whole, including a central cavity and a plurality of branch channels, the branch channels are radially arranged around the central cavity, and each branch channel is a streamlined arc structure. The present invention further provides the application of the above-mentioned electronic device in an electronic device with a microphone. The electronic device provided by the present invention can effectively reduce wind noise and significantly improve the call quality of communication equipment.

An audio processing method and apparatus, a device, and a computer-readable storage medium, relating to the technical field of audio processing. The audio processing method comprises: acquiring an input sound pickup signal (S100); detecting the input sound pickup signal, and identifying a wind noise frame in the input sound pickup signal (S200); and inputting the wind noise frame into a preset noise reduction model to obtain a noise reduction sound pickup signal corresponding to the wind noise frame, wherein the preset noise reduction model is obtained by training a generative adversarial network using a user speech vector, a noisy sample and a pure sample (S300). The method solves the technical problem that the suppression effect of the current pickup device on environmental noise is poor.

The invention discloses a high-voltage transmission line breakage prevention early warning system and method based on voiceprint recognition, and the system comprises a data collection unit which can collect the environment information around a high-voltage transmission tower in real time; the edge processing unit is used for eliminating wind noise interference generated when the multi-mode sensing device collects environment information, compensating frequency response deviation and extracting voiceprint MFCC features and low frequency spectrum energy entropy of vibration signals; the cloud server is used for generating an early warning instruction according to the environment information processed by the edge processing unit; and the early warning execution unit is used for carrying out early warning and expelling according to the early warning instruction. According to the invention, the environment information around the high-voltage tower is acquired in real time through the data acquisition unit, and the edge processing unit and the cloud server are arranged to carry out rapid collaborative analysis and judgment on the acquired voiceprint signals, so that real-time monitoring on the periphery of the high-voltage tower is ensured, and timely early warning and expelling on surrounding vehicles are realized.

The present invention discloses a folding driving device, including a driving mechanism, a gear assembly, a transmission assembly and a rotating seat for being fixedly connected with a mirror base; the transmission assembly is coaxially arranged with the gear assembly and can be transmission-connected with the gear assembly; the gear assembly is transmission-connected with the output end of the driving mechanism; the transmission assembly is coaxially arranged with the rotating seat and is always relatively statically connected; a limiting groove is provided on the side of the base facing the rotating seat; an elastic member and a limiting assembly for limiting the limiting groove are provided on the side of the rotating seat facing the base, and the elastic member can generate a gap between the rotating seat and the base; when the base is limited and the gear assembly continuously rotates in the limited direction, the gear assembly presses against the transmission assembly in the axial direction to make the rotating seat fit with the base. In the present invention, the transmission resistance between the base and the rotating seat can be reduced during the folding process of the rearview mirror, and at the same time, the entry of wind and sand and the generation of wind noise can be avoided when the rearview mirror is folded or unfolded in place.

The invention discloses a folding driving device which comprises a driving mechanism, a gear assembly, a transmission assembly and a rotating seat used for being fixedly connected with a mirror base. The transmission assembly and the gear assembly are coaxially arranged and can be in transmission connection with the gear assembly; the gear assembly is in transmission connection with the output end of the driving mechanism; the transmission assembly and the rotating seat are coaxially arranged and are always connected in a relatively static manner; a limiting groove is formed in the side, facing the rotating base, of the base. An elastic piece and a limiting assembly used for limiting the limiting groove are arranged on the side, facing the base, of the rotating base, and the elastic piece can enable a gap to be generated between the rotating base and the base. When the base is limited and the gear assembly continuously rotates in the limited direction, the gear assembly presses against the transmission assembly in the axial direction, so that the rotating seat is attached to the base. In the invention, the transmission resistance between the base and the rotating seat can be reduced in the folding process of the rearview mirror, and meanwhile, the entering of wind and sand can be avoided and the generation of wind noise can be reduced after the rearview mirror is folded or unfolded in place.

The invention discloses a wind noise simulation method, device and equipment based on a commercial vehicle and a medium. The method comprises the following steps: constructing a whole vehicle grid model matched with a target commercial vehicle to be subjected to noise simulation; importing the whole vehicle grid model into a pre-constructed blank simulation model framework to obtain a basic simulation model; setting free attribute parameters and material attribute parameters of the basic simulation model according to regional noise characteristics and material attributes of each key region in the whole vehicle grid model to obtain an external noise simulation model and an internal vocal cavity simulation model; and operating the external noise simulation model and the internal vocal cavity simulation model to obtain a wind noise simulation result of the target commercial vehicle. According to the embodiment of the invention, a comprehensive wind noise simulation result is provided, a powerful basis is provided for vehicle noise control and optimization, analysts are helped to identify noise sources and evaluate the effect of noise control measures, and vehicle design is optimized to reduce the noise level.

The embodiment of the invention provides a lifting assembly and a vehicle, the lifting assembly comprises a lifting body, the lifting body comprises a plurality of supports arranged in the first direction, and at least one support is partially provided with a curved surface; each bracket can be independently driven by the driving mechanism; when the lifting assembly ascends, the end, close to the second support, of the first support ascends and moves in the direction away from the second support, and the end, close to the first support, of the second support ascends. When the lifting assembly descends, the end, close to the second support, of the first support descends and moves in the direction close to the second support, and the end, close to the first support, of the second support descends. According to the lifting assembly, when each support descends, the flush degree between the support and the mounting surface can be independently adjusted, so that each support can be better flush with the mounting surface, the flush degree between the lifting body and the top surface of the vehicle is improved, wind resistance in the vehicle running process is reduced, energy consumption of the vehicle is reduced, and the service life of the vehicle is prolonged. And meanwhile, the wind noise is reduced.

The invention discloses an offshore wind plant fan bolt loosening early warning method and system based on voiceprint data, and the method comprises the steps: firstly, collecting original voiceprint data through presetting an anti-corrosion acoustic sensor array at a fan tower bolt connection part, removing wind noise and sea wave impact noise through preprocessing, extracting signal spectrum features after cutting, and carrying out the recognition of the original voiceprint data; and state feature extraction and feature extension are respectively carried out to obtain fault state features and voiceprint high-dimensional features, so that the looseness reason and state of a target bolt are identified, and finally, a maintenance work order is generated to trigger a bolt fastening early warning mechanism of an operation and maintenance system, so that effective early warning of the looseness of the fan bolt of the offshore wind plant is realized.

The utility model discloses a high-speed elevator landing door windproof noise reduction structure which comprises a door pocket assembly, a landing door assembly and a landing door sill, the landing door sill is installed at the lower end of the door pocket assembly, the landing door assembly is located on the landing door sill, a sealing wool top is installed on one side of the landing door assembly, and the landing door assembly is located on the landing door sill. After the elevator landing door is closed, the left side door and the right side door are sealed through the door rubber strip, a gap between the left side door and the right side door is avoided, then the landing door assembly and the door pocket assembly are sealed through the sealing wool top, and therefore the sealing effect is good. The gap between the landing door assembly and the door pocket assembly is avoided, and when an elevator runs at a high speed, airflow is effectively prevented from quickly circulating between an elevator shaft and an elevator waiting hall, so that wind sound and noise generated when the elevator runs are reduced, and the riding comfort of passengers is improved to a certain extent.

The invention relates to the technical field of optical fiber sensing, in particular to a distributed optical vibration sensing early warning verification method for an island multi-source environment. Signals collected in different environments and different states are preliminarily divided into threat signals and non-threat signals, the effectiveness of data is further verified through frequency spectrum transformation, low-frequency noise and natural environment interference signals such as sea waves and wind sound are filtered out from the signals through a 5Hz high-pass filter, high-frequency noise is further suppressed by applying a wavelet denoising technology, and the non-threat signals are obtained. And useful signal features are reserved. A variational mode decomposition technology is adopted to carry out multi-scale decomposition on signals, and multiple classic features of a mode function obtained after decomposition are selected to extract feature vectors. Low-frequency effective signals are extracted, and high-frequency noise is removed, so that essential characteristics of the signals can be better captured. And the data subjected to signal processing is input into a CNN-LSTM-Attention model for deep learning analysis.

The invention discloses a wind noise prevention and shock absorption special glass composite structure and a manufacturing process, and the wind noise prevention and shock absorption special glass composite structure comprises two outermost tempered glass bodies, a plurality of grooves, a honeycomb-shaped inner sandwich, a shape memory alloy frame body I and a shape memory alloy frame body II, first clamping cavities are formed between the first shape memory alloy frame body and the buffering parts and between the second shape memory alloy frame body and the buffering parts, second clamping cavities are formed between the two buffering parts and the adjacent reinforcing bodies, and third clamping cavities are formed between the two reinforcing bodies and the adjacent laminated glass layers; various materials and structures of the outermost tempered glass body, the laminated glass layer, the buffer part, the reinforcing body, the honeycomb inner sandwich and the shape memory alloy frame body are compounded to form a multi-layer synergistic wind noise prevention and shock absorption system, and the wind noise prevention and shock absorption performance is remarkably improved due to the special shapes and distribution of the second clamping cavity, the third clamping cavity, the through concave body and the elastic pressing body.

The invention relates to the technical field of noise control, and discloses a vehicle chassis wind noise optimization method and device, computer equipment, a medium and a product, and the method comprises the steps: carrying out the dynamic mode decomposition of obtained flow field data, obtaining the flow field mode characteristics under different frequencies, screening out the low-frequency mode characteristics of middle and low frequencies, and carrying out the optimization of the low-frequency mode characteristics; therefore, the space-time evolution characteristics of the low and medium frequency wind noise in the vehicle chassis flow field can be accurately analyzed. Furthermore, the flow-induced load characteristic and the sound-induced load characteristic in each low-frequency modal characteristic are decoupled to obtain the sound-induced load characteristic in each low-frequency modal characteristic, so that the influence of airflow fluctuation, structural vibration and the like caused by the flow-induced load on the wind noise analysis is avoided; therefore, the positioning accuracy of the sound source and the propagation path of the wind noise waves is improved. And finally, in combination with the sound source and the propagation path of the wind noise wave, the low and medium frequency wind noise of the vehicle chassis is optimized, and the user experience is improved.

The disclosure provides a vehicle grille structure that is capable of suppressing wind noise and taking into account appearance. The vehicle grille structure includes: a vehicle exterior member, having a grille opening; a grille fin, provided on the grille opening and across the grille opening in an up and down direction of the vehicle; and a reinforcement rib, provided on a rear surface of the grille fin and having a size in a width direction of the vehicle that is smaller than a size of the grille fin in the width direction. The reinforcement rib extends in the up and down direction and is inclined in the width direction.

The invention relates to the artificial intelligence technology, and discloses a regulation and control method and device for cooling fans in a relatively closed space and a cooling system.The regulation and control method comprises the steps that electronic devices in the relatively closed space are controlled to operate in different power consumption modes, and a plurality of cooling fans are controlled to operate in cooperation with parameter combinations of different rotating speeds and rotating directions; temperature data of the electronic device and wind noise data outside the relatively closed space are collected; inputting related collected data into the artificial intelligence model for training, and generating corresponding optimal parameter combinations between the cooling fans when the electronic device is in different power consumption modes; and when the electronic device is actually applied, cooling the electronic device by using the corresponding optimal parameter combination between the cooling fans according to the current power consumption mode of the electronic device. The invention further discloses a computer readable storage medium. The invention aims to reduce the generated wind noise as much as possible while cooling the electronic device in the relatively closed space by using the cooling fan.

The embodiment of the invention relates to noise reduction equipment and method for a fan in a terminal. The noise reduction equipment comprises a first air duct, at least one noise reduction air duct and a switch combination. One end of the first air duct is connected with a fan air outlet, and the other end of the first air duct is connected with a terminal air outlet; one end of the noise reduction air duct is connected with the fan air outlet, and the other end of the noise reduction air duct is connected with the terminal air outlet; switches in the switch combination are arranged at an air inlet and an air outlet of the noise reduction air duct, and the switch combination is used for controlling the noise reduction air duct to be opened or closed; the air channel length difference between the first air channel and the noise reduction air channel is nL + L / 2, n is a natural number, and L is the wind noise wavelength at the air outlet of the fan. According to the embodiment of the invention, the wind noise at the air outlet of the terminal is mutually counteracted, so that the wind noise is reduced.

The present disclosure relates to a method and system (1) for suppressing wind noise. The method comprises obtaining an input audio signal (100, 100′) comprising a plurality of consecutive audio signal segments (101, 102, 103, 101′, 102′, 103′) and suppressing wind noise in the input audio signal with a wind noise suppressor module (20) to generate a wind noise reduced audio signal. The method further comprises sing a neural network (10) trained to predict a set of gains for reducing noise in the input audio signal (100, 100′) given samples of the input audio signal (100, 100′), wherein a noise reduced audio signal is formed by applying said set of gains to the input audio signal (100, 100′) and mixing the wind noise reduced audio signal and the noise reduced audio signal with a mixer (30) to obtain an output audio signal with suppressed wind noise.

The utility model provides an outdoor unit and an air conditioner, and relates to the field of air conditioners. The outdoor unit comprises a machine shell and a fan arranged in the machine shell, the machine shell comprises a front panel, the front panel comprises a panel part, a flow guide ring part and an air outlet mesh enclosure part, the panel part, the flow guide ring part and the air outlet mesh enclosure part are integrally arranged, the flow guide ring part protrudes out of the panel part, and the air outlet mesh enclosure part is arranged at the air outlet end of the flow guide ring part; a hub is coaxially and fixedly arranged on an output shaft of the fan, fan blades are fixedly installed on the hub, the tail wing end of each fan blade is arranged in the flow guide ring part, and the ratio of the distance X between the tail wing end and the panel part to the length H of the flow guide ring part is 0.31-0.89, or the ratio of the distance X between the tail wing end and the panel part to the distance E between the tail wing end and the air outlet mesh enclosure part is 0.85-2.38. According to the outdoor unit, the air outlet amount of the outdoor unit is increased, and then the gas flowing efficiency and the heat exchange efficiency of the outdoor unit are improved. In addition, if the air volume is not changed, the air speed of the outdoor unit can be properly reduced, and therefore the air noise can be reduced.

The invention discloses a folding driving device capable of reducing noise. The folding driving device comprises a driving mechanism, a gear assembly, a transmission assembly and a rotating seat used for being fixedly connected with a mirror base. The transmission assembly and the gear assembly are coaxially arranged and can be in transmission connection with the gear assembly; the gear assembly is in transmission connection with the output end of the driving mechanism; the transmission assembly and the rotating seat are coaxially arranged and are always connected in a relatively static manner; a limiting groove is formed in the side, facing the rotating base, of the base. An elastic piece and a limiting assembly used for limiting the limiting groove are arranged on the side, facing the base, of the rotating base, and the elastic piece can enable a gap to be generated between the rotating base and the base. When the base is limited and the gear assembly continuously rotates in the limited direction, the gear assembly presses against the transmission assembly in the axial direction, so that the rotating seat is attached to the base. In the invention, the transmission resistance between the base and the rotating seat can be reduced in the folding process of the rearview mirror, and meanwhile, the entering of wind and sand can be avoided and the generation of wind noise can be reduced after the rearview mirror is folded or unfolded in place.

The invention provides a vehicle-mounted noise reduction system. The vehicle-mounted noise reduction system comprises a multi-mode sensor array, at least one vibration sensor, a plurality of high-precision acoustic sensors, an IMU unit and a temperature and humidity sensor. And the signal processing module is used for executing noise feature extraction, multi-sensor data fusion and dynamic weight distribution. The self-adaptive control module comprises a filtering module and a local mute area control module and is used for being connected with a vehicle-mounted CAN bus and adjusting noise reduction parameters according to the vehicle state. And the self-calibration unit is used for periodically detecting the health state of the sensor, implementing temperature compensation and redundancy switching, filtering the monitored sound wave, analyzing based on the filtered sound wave information, comparing the sound wave information with the to-be-denoised parameter to calculate a sound wave information difference value, and transmitting the sound wave information difference value to the self-adaptive control module. The situation that noise data errors are large due to road noise and wind noise is avoided, the situation that the noise reduction effect fails due to collection errors is avoided, and the mute performance in the vehicle is guaranteed.

The invention belongs to the field of vehicle-mounted acoustic signal processing and recognition, and particularly relates to an emergency vehicle detection method based on acoustic spectrum-time domain information fusion, which comprises the following steps: acquiring an audio signal from an environment through vehicle-mounted microphone equipment, and respectively expressing the audio signal by a frequency domain and a time domain; introducing a coordinate attention network to perform fusion calculation on the features in the time domain representation and the frequency domain representation to obtain attention fused features; and inputting the attention fused features into a lightweight detection neural network model, and calculating whether siren sound exists in the current signal. According to the invention, through fusion of time domain and frequency domain information and combination of a coordinate attention mechanism, high identification precision can be maintained in high-speed driving or other scenes with large noise interference; especially under the condition that the influence of background noise such as engine noise, wind noise and traffic flow is large, the siren sound of the emergency vehicle can still be accurately detected, and the robustness of the system is enhanced.

To provide a spring easily installed on a handrail of a lattice structure and capable of reducing wind noise, a handrail to which the spring is attached, and a lattice structure provided with a handrail.SOLUTION: A spring 14 comprises a plate part 23 that has a pair of plate materials 22 arranged opposite each other inside the handrail 12 and extending in the elongation direction of the handrail 12, and elastic parts 24, 25 attached at both ends of the plate materials 22 in the elongation direction of the handrail 12 and forming an annular shape together with the plate materials 22. The elastic parts 24, 25 cause the plate materials 22 to always bring the entire surface of each contact surface 22a of the plate materials 22 into contact with an inner wall surface 12a, and the plate material 22 and the inner wall surface 12e exert relatively movable pressing force when the handrail 12 is deformed.SELECTED DRAWING: Figure 2

The invention belongs to the technical field of building construction flaw detection, and particularly relates to flaw detection equipment for building construction, which comprises a cabinet body, two groups of sliding rails are symmetrically distributed and fixedly connected in the cabinet body, each group of sliding rails is slidably connected with a group of sliding blocks, and the two groups of sliding blocks are fixedly connected with a power supply and a high-pressure fan respectively; an exhaust port is formed in the cabinet body and located at the exhaust end of the high-pressure fan, the air suction end of the high-pressure fan is communicated with a hose, the end, away from the high-pressure fan, of the hose is fixedly communicated with a pipe head, the pipe head is rotationally connected with a vehicle body, and the two ends of the vehicle body are fixedly connected with two first supports respectively. The high-pressure fan is used for generating low pressure to provide suction force, so that the vehicle body can be stably attached to the wall for flaw detection, the vehicle body flexibly moves on the wall surface by driving the Mecanum wheels, and the high-pressure fan and the vehicle body are arranged away from each other; therefore, the negative influence of mechanical noise and wind noise generated when the high-pressure fan provides the suction force on the signal-to-noise ratio of ultrasonic detection is avoided.

The invention belongs to the technical field of earphones, and particularly relates to a method for reducing wind noise of an earphone, a noise reduction device, the earphone and a computer storage medium. The method for reducing the wind noise of the earphone comprises the steps of obtaining wind power information of the position where the earphone is located and orientation information of a sound inlet hole of a microphone of the earphone, calculating actual wind noise energy according to the wind power information and the orientation information of the sound inlet hole, and matching a corresponding audio according to the actual wind noise energy and reversely counteracting the wind noise at the sound inlet hole. According to the technical scheme, the product can automatically match the wind power information of the position where the user is located and the sound inlet hole orientation information of the microphone of the earphone, actual wind noise energy can be calculated through the wind power information and the sound inlet hole orientation information of the microphone, and corresponding audio frequency is matched to reversely act on real-time wind noise at the sound inlet hole of the earphone, so that the real-time wind noise energy is calculated. Noise caused by wind blown in through the sound inlet hole of the microphone is offset, and the effect of intelligent noise reduction of the earphone according to wind power is achieved.

The utility model relates to an active noise reduction system installation structure of a lampblack suction device and a range hood, an active noise reduction system comprises a sound collection device, the sound collection device is arranged in an air duct of the lampblack suction device, and the air duct is provided with a first side wall, a second side wall and an airflow inlet, the first direction is perpendicular to the extending direction of the air channel, the airflow inlet is arranged adjacent to the first side wall, at least one sound collecting device is arranged adjacent to the second side wall, the distance between the first side wall and the second side wall of the air channel is a, the distance between the sound collecting device and the second side wall is recorded as L1, and L1 and a meet the relation that L1 / a is larger than 0 and smaller than 0.3. The sound collection device is arranged on the side, away from the airflow inlet, in the air duct, so that the adverse effect of secondary noise (wind noise) generated when the sound collection device is directly impacted by airflow on sound collection can be better reduced, and the sound collection accuracy is improved.