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32results about How to "Suppress wind noise" patented technology

Wind noise detection and suppression

Wind noise is detected in and removed from an acoustic signal. Features may be extracted from the acoustic signal. The extracted features may be processed to classify the signal as including wind noise or not. The wind noise may be removed before or during processing of the acoustic signal. The wind noise may be suppressed by estimating a wind noise model, deriving a modification, and applying the modification to the acoustic signal. In audio devices with multiple microphones, the channel exhibiting wind noise (i.e., acoustic signal frame associated with the wind noise) may be discarded for the frame in which wind noise is detected.
Owner:KNOWLES ELECTRONICS INC

Dynamoelectric machine

An armature winding is constructed by connecting an a-phase winding phase portion, a b-phase winding phase portion, a c-phase winding phase portion, a d-phase winding phase portion, and an e-phase winding phase portion into an annular shape so as to have a phase difference corresponding to an electrical angle of 72 degrees from each other. A rectifier is constituted by a five-phase full-wave rectifier formed by connecting in parallel five pairs of diodes connected in series. Output wires of the armature winding are connected to respective connection points of diodes connected in series on the rectifier.
Owner:MITSUBISHI ELECTRIC CORP

Sliding door device

A sliding door device includes a frame case that includes an opening through which an air flow passes, a slide door that is moved relative to the opening to adjust an aperture ratio of the opening, a shaft that is disposed at an upstream side of the slide door when viewed along the flowing direction of the air flow, and moves the slide door, and a windbreak member that blocks a gap between the shaft and the slide door.
Owner:MAHLE INT GMBH

Wind noise suppression in directional microphones

A directional microphone includes a housing, a diaphragm dividing the housing into a front volume and a back volume, electronics for detecting signals corresponding to movements of the diaphragm, and front and back inlets for the front and back volumes, respectively. To obtain additional low frequency roll-off in the directional microphone, the directional microphone includes an elongated acoustical conduit connecting the front volume and the back volume. The acoustical conduit may be external or internal to the housing.
Owner:SONION NEDERLAND

Hearing aid adapted for suppression of wind noise

A hearing aid (100) having a microphone, a signal processing unit, an electrical-acoustical output transducer, a housing (101) and a wind shield cover (102) wherein the housing has a surface with a microphone inlet (112, 113), and the wind shield cover is adapted to be attached to the housing, to cover the microphone inlet, to provide for sound to be guided in a gap between the wind shield cover and the housing, hereby providing for the transmission of sound from the surroundings and to said microphone inlet, wherein a first dimension of a cross-section of the gap is in the range between 0.15 mm and 0.5 mm, and wherein the minimum distance, along the gap, from the microphone inlet and to the opening of the gap, towards the surroundings, is at least 1 mm.
Owner:WIDEX AS

AC generator for vehicle

The invention provides a high-power vehicle AC generator, able to reduce the noise called wind noise and electromagnetic noise, improving the rotor magnetic circuit. Its character: it has the chamferangle part composed of the surface which links the following three points: point B, developed on the circumferential end surfaces of the base shoulder of the pole boots(18a) and (19a) and developed on the subulate starting line by the peripheral surfaces of the base shoulder, point C on the warping tilt part of the pole boots (8a) and (9a), and point an on the circumferential end surfaces of the pole boots (8a) and (9a) L1 / 4-7í‡L1 / 8 distant from the end surface of the stator iron core when the distance between the base side end surface of the pole boots (8a) and (9a) and the end surface of the stator iron core is set as L1.
Owner:MITSUBISHI ELECTRIC CORP

Centrifugal fan

A side wall of a centrifugal fan includes a gap expanding portion arranged to gradually expand a gap between an impeller and the side wall from an upstream end toward a downstream end with respect to a rotation direction of a rotating portion. In the centrifugal fan, an electronic component arranging portion of a board is arranged in an area surrounded by the gap expanding portion, the impeller, and an air outlet, and accordingly does not overlap with a motor or the impeller in an axial direction. The electronic component arranging portion is arranged in an area extending, in a circumferential direction about a central axis, from a position 180 degrees upstream from a middle of the air outlet downstream to the middle of the air outlet, that is, in an area where a wind channel has a large width.
Owner:NIDEC CORP

Narrow directional microphone

A narrow directional microphone includes a unit case having a front end portion to which a microphone unit is mounted, and a side surface functioning as a grip, an acoustic tube formed of resin material in a tubular shape, covering the microphone unit, and attached to the front end portion of the unit case such that the microphone unit is positioned to an inner bottom portion of the acoustic tube, a piezoelectric film that is arranged in at least one part of the acoustic tube, and that generates a detection output based on a mechanical deformation of the acoustic tube, and an output signal processing unit including an attenuation circuit that attenuates an audio signal from the microphone unit with the detection output from the piezoelectric film and sends the attenuated audio signal to a signal output unit.
Owner:AUDIO-TECHNICA

External sensor attachment portion structure

In an external sensor attachment portion structure of the present invention, an external sensor includes: a sensor main body including a detection unit that detects external information; a sensor attachment bracket used to attach the sensor main body to a vehicle body frame member; and a sensor garnish including a window portion through which the detection unit is exposed in front view. The sensor garnish is provided on an outer side of the host vehicle so as to expose the detection unit of the external sensor and cover the sensor main body and the sensor attachment bracket excluding the detection unit. Small gaps are provided between the sensor main body and a window frame of the window portion in the sensor garnish. The window frame includes a noise suppression portion that suppresses wind noise due to airflow passing through the gaps along a rearward direction of the host vehicle.
Owner:HONDA MOTOR CO LTD

Hearing aid adapted for suppression of wind noise

A hearing aid (100) having a microphone, a signal processing unit, an electrical- acoustical output transducer, a housing (101) and a wind shield cover (102) wherein the housing has a surface with a microphone inlet (112, 113), and the wind shield cover is adapted to be attached to the housing, to cover the microphone inlet, to provide for sound to be guided in a gap between the wind shield cover and the housing, hereby providing for the transmission of sound from the surroundings and to said microphone inlet, wherein a first dimension of a cross-section of the gap is in the range between 0.15 mm and 0.5 mm, and wherein the minimum distance, along the gap, from the microphone inlet and to the opening of the gap, towards the surroundings, is at least 1 mm.
Owner:WIDEX AS

Hearing aid adapted for suppression of wind noise

A hearing aid (100) having a microphone, a signal processing unit, an electrical-acoustical output transducer, a housing (101) and a wind shield cover (102) wherein the housing has a surface with a microphone inlet (112, 113), and the wind shield cover is adapted to be attached to the housing, to cover the microphone inlet, to provide for sound to be guided in a gap between the wind shield cover and the housing, hereby providing for the transmission of sound from the surroundings and to said microphone inlet, wherein a first dimension of a cross-section of the gap is in the range between 0.15 mm and 0.5 mm, and wherein the minimum distance, along the gap, from the microphone inlet and to the opening of the gap, towards the surroundings, is at least 1 mm.
Owner:WIDEX AS

A kind of double horn earphone

The invention provides a dual-speaker headphone comprising a hollow shell, a bass passive radiator located in the shell, a tweeter and a woofer. The tweeter is opposite to the woofer. An inner cavity of the shell is divided into a front cavity for accommodating the tweeter and a rear cavity for accommodating the woofer by the bass passive radiator. The structure edge of each of the woofer and the tweeter is provided with a smooth surface, and a sound surface of each of the woofer and the tweeter faces the outside of the shell. A conical diffuser is disposed in front of the back of the woofer while another conical diffuser is disposed in front of the sound surface of the tweeter. As to the part of the shell, used for forming the rear cavity, the area corresponding to the sound surface of the woofer is in a mesh enclosure structure, and the area connected with the bass passive radiator is provided with a pressure-equalizing inverter hole or pressure-equalizing inverter tube. An independent sound cavity provided with a pressure-equalizing inverter hole or pressure-equalizing inverter tube is further formed in the front cavity. The tweeter is located in the independent sound cavity. The dual-speaker headphone is capable of inhibiting wind noise and standing wave, so that sound pressure balance is improved and eardrum stress is relieved.
Owner:QINGDAO GOERTEK

Electronic product capable of attenuating microphone noise

The invention discloses an electronic product capable of attenuating microphone noise. The electronic product comprises a microphone and a shell, wherein the shell is provided with a plurality of sound inlet holes; one independent audio transmission channel is formed between each sound inlet hole and the microphone respectively; the length of each audio transmission channel is larger than a vertical distance between the microphone and the shell; the audio transmission channels construct a front cavity of the microphone together; the equivalent acoustic capacitance Ca of the front cavity is less than or equal to Co; and Co is acoustic capacitance being equivalent to the volume of the front cavity determined according to the requirements of the high frequency cut-off frequency of a microphone monomer and the application scenario of the electronic product on high frequency cut-off frequency. Through special design of the front cavity of the microphone, the noise protection performance ofthe electronic product is improved on the premise of ensuring high-frequency response performance of the microphone.
Owner:GEER TECH CO LTD

A skylight noise reduction component and a method for determining its optimum opening

The invention provides a skylight noise reduction assembly which comprises a front assembly, a rear assembly and a control unit. The front assembly comprises a front plate and a front driving mechanism. The rear assembly comprises a rear plate and a rear driving mechanism. The front driving mechanism and the rear driving mechanism are connected with the control unit. The front end of the front plate is connected with the front driving mechanism arranged at the front end of the inner edge of a skylight, and the rear end of the front plate can be overturned up and down under the action of the front driving mechanism; The rear end of the front plate can adhere to the end face of the front end of the rear plate, and the rear end of the rear plate can adhere to the rear end edge of the inner side of the skylight. The invention further provides a method for determining an optimal opening of the skylight noise reduction assembly. The skylight noise reduction assembly has the advantages that the opening of the front plate and the opening of the rear plate can be automatically adjusted according to concrete conditions of a vehicle; when the skylight is opened, the front plate changes the wind eddy dropping direction and position; if the rear edge of the front plate is in a sawtooth shape or a wave shape, dropping of a wind eddy can be avoided, and noises are reduced.
Owner:WUHAN UNIV OF TECH

Fan system and sound suppression method thereof

The invention provides a fan system and a sound suppression method thereof. A fan system is used for dissipating heat of an electronic device. The fan system includes a fan, a hollow structure, and acontrol circuit. Sound waves made by the fan are transmitted to an interior of the hollow structure when the fan is operating. The control circuit is connected to the hollow structure and is configured to control deformation / deformations of the hollow structure according to a state / states of the fan and / or the electronic device, which change a volume of the interior of the hollow structure for making a resonance frequency of the hollow structure being approximate to a rotation speed of the fan or being the same as the rotation speed of the fan. The provided fan system can make the resonance frequency of the hollow structure to be approximate to / be the same as a rotation speed of the fan so as to reduce the sound generated by the rotation of the fan; or the circuit is controlled to properlyadjust the thickness of the body, the distance between the fan and the bottom of a groove can be maintained at a proper value so as to inhibit the wind shear sound.
Owner:WISTRON CORP

Blow-off device of air conditioner

A blow-off device (10) is equipped with a wind direction variable means (40) and a pressure adjustment unit (60) in a ventilation passage (50). The wind direction variable means is rotatably provided in the ventilation passage and can change a conditioned air from the inflow port (50c) toward a blow-off port (50d) and a second inclined part (52r) along an intermediate part (53r). The pressure adjustment unit prevents the pressure of the ventilation passage from exceeding a predetermined value by releasing the conditioned air to the outside of the ventilation passage. A bypass inlet (66) of the pressure adjustment unit is provided on an upstream side of an end portion (42d) in a +X direction at the time of maximum rotation of the wind direction variable means.
Owner:HONDA MOTOR CO LTD

Earphone noise reduction method, earphone equipment and computer readable storage medium

The invention provides an earphone noise reduction method, earphone equipment and a computer readable storage medium, and relates to the technical field of earphones. The method comprises the following steps: calculating a first signal in a feedforward microphone according to an adaptive filter to obtain an estimated signal of wind noise; and performing wind noise reduction on the second signal in the feedback microphone according to the estimation signal to obtain a target signal for output. According to the invention, when the earphone device starts the active noise reduction mode, in a wind noise scene, the sound signal in the feed-forward microphone is used as the reference signal of the adaptive filter, so that the estimation signal of wind noise is obtained, and the signal in the feedback microphone is used as the input signal of adaptive filtering according to the estimation signal, so that the noise reduction effect is improved. According to the technical scheme, wind noise reduction is carried out on the signals collected in the feedback microphone, when the earphone equipment starts the active noise reduction mode, wind noise in a scene can be effectively suppressed, so that noise reduction is carried out on environment noise and wind noise, and the noise reduction effect and the call effect in the earphone equipment are effectively optimized.
Owner:CHONGQING WUQI MICROELECTRONICS CO LTD +1

Wind direction adjusting apparatus

A wind direction adjusting apparatus which can appropriately adjust a wind direction with a simple structure is provided. A case body includes an upstream portion located in a relatively upstream sideof the wind, and a downstream portion located in a downstream side of the wind with respect to the upstream portion and expanded in a short direction of an outlet from the upstream portion. Fins include end fins each having a fixed end positioned along an edge portion of the outlet in a longitudinal direction and an intermediate fin located between the end fins. The end fins and the intermediatefin pivot in a same direction in conjunction with each other. Each end fin is disposed so as to intersect an imaginary line in a wind passage direction along a narrowed portion in a state in which each end fin is pivoted to a downstream portion side.
Owner:NIHON PLAST CO LTD

Vehicle window wind noise and wind vibration regulating device and vehicle

The invention provides a vehicle window wind noise and wind vibration regulating device and a vehicle, and relates to the technical field of vehicles. The vehicle window wind noise and wind vibration regulating device of the present invention may include: a deflector arranged at the cover plate of the triangular window of the rearview mirror of the vehicle, and the deflector is configured to rotate in a controlled manner to adjust the wind noise and wind vibration of the window. vibration; the driving device is used to drive the wind deflector to rotate in a controlled manner; and the control device is configured to control the driving device to drive the wind deflector to rotate at a preset angle to adjust the opening of the window according to the size of the window opening and / or the speed of the vehicle. Wind noise and wind vibration. The deflector of the present invention can be controlled to rotate, and the control device controls the angle of rotation of the deflector according to the speed of the vehicle and the size of the window opening, so as to ensure that the wind noise and wind vibration of the window are effectively suppressed, It ensures that the vehicle can reduce the wind noise and wind vibration of the vehicle to the best effect under different vehicle speeds or different sizes of vehicle window openings.
Owner:WUHAN LOTUS CARS CO LTD

Speaker arrangement structure for vehicle

The purpose of the present invention is to provide a speaker arrangement structure for a vehicle, the speaker arrangement structure being capable of transmitting sound (port playback sound) that is played out from a port opening to a cabin, suppressing the falling of mud or water on the port opening, and suppressing the generation of wind noise caused by the flow of air exiting from the port opening. In the speaker arrangement structure, a port opening portion (46) communicating with internal spaces (S2, S3, S4) of the speaker box (40) is provided in a front side surface portion (42i) of the speaker box (40) to form a space portion (70) surrounded by the front side surface portion (42i) of the speaker box (40), the dash panel (37), the hinge column (30), and the partition member (50), and the space portion (70) communicates with a passenger space above or below the space portion (70). The size (L2) of the space (70) in the front-rear direction from the port opening (46) is set to be at least larger than the maximum size (L1) of the port opening (46).
Owner:MAZDA MOTOR CORP

Wind noise suppression method and device based on multiple microphones

The invention discloses a wind noise suppression method and device based on multiple microphones. The method comprises the following steps that S1, microphone signals are selected to be output according to the low-frequency energy of all microphones; s2, suppressing the wind noise frequency point of the output microphone signal according to the energy magnitude relationship between each frequency point of the output microphone signal and each frequency point of other microphone signals; and S3, carrying out difference on signals of the main microphone and other microphones, taking low-frequency signals to carry out wind noise detection and wind noise magnitude estimation, and carrying out wind noise suppression in combination with a wind noise continuity characteristic.
Owner:SHANGHAI FULLHAN MICROELECTRONICS

Pneumatic punching-in tool

ActiveCN103372845ASuppress wind noiseImprove assembly statusNailing toolsPunchingActuator
The invention provides a pneumatic punching-in tool for driving in a punching-in member, capable for suppressing wind noise of exhausted compression air when the compression air as drive source is opened to atmosphere. When a punching-in operation of a punching-in actuator (35), compression air in an upper piston chamber (52) flows to a lower piston chamber, so that a piston (33) including the punching-in actuator (35) is reset to an initial position before punching-in operation. Exhaust channel at a side exhausting structure communicates with an exhaust channel for a trigger valve exhausting structure (74) which allows the force application air of a trigger valve (73) for opening and closing of an advancing head valve (41) to be exhausted to the outside of a tool body (15) through a communication channel (424), so that air not needed can be exhausted to the outside of a tool body (15) from the trigger valve exhausting structure (74). In addition, the trigger valve exhausting structure (74) is provided with a pressure releasing chamber (75) capable of expanding before air flowing in the trigger valve exhausting structure (74) is exhausted outside the tool body (15).
Owner:MAKITA CORP
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