71 results about "Transmitted sounds" patented technology

The invention discloses a frequency mixing sound demodulator based on a curled structure and a use method thereof in the acoustics field, the demodulator is used for separating frequency mixing sound mixed by a plurality of sound waves with preset frequencies according to respective frequencies, and the demodulator comprises an air waveguide for transmitting the sound waves, and blocking structures arranged on two sides of the air waveguide for blocking the sound waves from penetrating, and a plurality of curled structures that capture corresponding preset frequency sound waves; curled structures are arranged in the barrier structure on at least one side of the air waveguide at intervals, one end of each curled structure is open, and the other side is closed; a plurality of cross beams for blocking penetration of sound waves are arranged in each curled structure, and an internal channel of each curled structure is divided into different lengths to serve as different acoustic resonant cavities so as to capture the sound waves with different frequencies; the closed end of each curled structure is a detection end of each preset frequency sound wave. The invention solves the problem that the existing method is difficult to instantly separate the frequency mixing sound signal and carry out information transmission.

The present disclosure relates to a system (100) for acoustic detection of a physical event, the system (100) comprising: at least one conversion element (10) for converting a physical event into a characteristic sound; an acoustic sensor (40) configured to be mechanically connected to the structure (50) at a distance from the at least one conversion element (10); and a processor (42, 62) coupled to the acoustic sensor (40) wherein the at least one conversion element (10) is configured to react to the physical event by generating a characteristic sound and to introduce the characteristic sound into the structure (50), the acoustic sensor (40) is configured to record the characteristic sound generated by the at least one conversion element (10) as a structure propagation sound propagating through the structure (50), and wherein the processor (42, 62) is configured to detect the physical event based on the characteristic sound recorded by the acoustic sensor (40).

Embodiments of the present application relate to the technical field of audio products, and disclose a sound cavity structure and an electronic device. The sound cavity structure comprises a cavity body. The cavity body is provided with an inner cavity, a mounting hole in communication with the inner cavity and used for connecting a loudspeaker, and a sound outlet hole in communication with the inner cavity. The inner cavity is provided with a sound transmission channel for transmitting sound emitted by the loudspeaker to the sound outlet hole. The sound transmission channel comprises at least one layer of sub-channels arranged in the axial direction of the mounting hole, and there are a plurality of sub-channels located in a same layer. Moreover, the lengths of the plurality of sub-channels gradually increase in a direction away from the center of the inner cavity, and two adjacent sub-channels are in communication with each other. The sound cavity structure and the electronic device provided by the embodiments of the present application can enhance the bass effect of the electronic device within a limited space at low costs.

The invention relates to a method for locating an anomaly in a rotor blade (6) of a wind turbine (1), comprising the following steps: - Detection of airborne sound by means of at least one airborne sound sensor (11, 21, 31) arranged within the rotor blade (6); - Detection of structure-borne sound by means of at least one structure-borne sound sensor (12, 22, 32) arranged in or on the rotor blade (6); - Determining time points (t K , t L ), to which an event in which airborne sound and structure-borne sound are emitted at an unknown origin position in or on the rotor blade (6) is reflected in the detected airborne sound and in the detected structure-borne sound; - Determining a time difference (Δt) between the times (t K , t L ); and - Determining the origin position based on the time difference (Δt) and the positions of the airborne sound sensor (11, 21, 31) and the structure-borne sound sensor (12, 22, 32). The invention further relates to an arrangement suitable for carrying out the method for locating an anomaly in a rotor blade (6) of a wind turbine (1).

The application provides a cylindrical array sonar system and a target detection method based on high-resolution beam forming. The method comprises the following steps: converting a beam forming weight vector of a received sound wave signal into a Kronecker product, combining a joint probability density model to construct a negative log-likelihood function, and optimizing a vector in an azimuth dimension and an elevation dimension through a preset direction constraint condition to form a high-resolution beam; performing correlation analysis on echo signals reflected by a target at different azimuth angles and elevation angles and on transmitted sound wave signals at different time delays; constructing a three-dimensional matrix containing a distance, an azimuth angle and an elevation angle according to a correlation analysis result, performing normalization processing on the three-dimensional matrix to eliminate signal intensity differences, and outputting a target detection positioning result. Through the combination of Kronecker integral decomposition and three-dimensional matrix modeling, the application realizes high-resolution joint positioning detection of a target in an azimuth angle, an elevation angle and a distance dimension, effectively eliminates signal intensity differences, and improves positioning accuracy.

A hearing device with an optical sensor includes: a light source (212, 300, 304, 308, 402) configured to emit light; a photodetector (214, 404) configured to detect light emitted by the light source after it has passed through tissue of a subject; an audio receiver (116, 202) configured to transmit sound to the subject; and a dome structure (120, 206) configured to conform to the shape of the ear canal when the hearing device is in the subject's ear canal. The output of the light source (212, 300, 304, 308, 402) and the input of the photodetector (214, 404) are separated by the dome structure (120, 206), and the dome structure (120, 206) absorbs and / or reflects at least a portion of the light emitted by the light source.

The utility model provides a loudspeaker structure based on vibration sound transmission, which relates to the technical field of electroacoustic conversion devices, and comprises an upper cover assembly, a voice coil assembly, a magnetic circuit assembly and a lower cover assembly, and the surface of the upper cover assembly is provided with a heat dissipation hole I, a positioning hole and a fixing hole. According to the utility model, the magnetic circuit assembly and the voice coil assembly which are modularly designed are matched, an innovative structure that the voice coil is fixed and the magnetic circuit is movable is adopted, an electric signal is directly converted into mechanical vibration to be conducted to a human body, effective conversion from a sound signal to somatosensory vibration is realized, and the limitation that a traditional loudspeaker can only transmit sound waves through air is overcome; the heat dissipation holes and the ventilation grooves arranged in the upper and lower cover assemblies form convection heat dissipation channels, the heat conduction performance of the metal heat dissipation fins is matched, the heat dissipation problem during working of the vibration horn is effectively solved, long-time stable operation of equipment is guaranteed, meanwhile, the elastic supporting structure of the elastic pieces is utilized, vibration loss is reduced, and vibration conduction efficiency is improved.

To provide an acoustic output device which utilizes a combination of an air-transmitted sound with a bone-transmitted sound produced through bone transmission, and therefore can reproduce a more natural and realistic stereophonic sound regardless of the shapes of ears, the differences among individuals or the faultiness in a recording system or a regeneration system. [Solution] An acoustic output device is provided, which is equipped with an air-transmitted sound display unit for displaying an air-transmitted sound and a bone-transmitted sound display unit for displaying a bone-transmitted sound, wherein the bone-transmitted sound display unit is located at a position which is not in the vicinity of an ear of a user when the user puts on the acoustic output device. According to the acoustic output device, a stereophonic sound can be regenerated regardless of the shapes of ears, the differences among individuals or the faultiness in a recording system or a regeneration system.

The invention provides a boiler combustion state prediction and fault diagnosis method and system based on sound wave temperature measurement, and the method comprises the steps: sequentially transmitting sound wave signals through a plurality of sound wave receiving and transmitting devices, receiving feedback signals, obtaining multi-path sound wave propagation time data, building a multi-parameter conversion model according to the relation between sound velocity and temperature, and carrying out the calculation of the multi-parameter conversion model; converting sound wave propagation time data into hearth temperature field distribution in real time; time domain statistical analysis is conducted on the sound wave signals, statistical characteristic parameters of propagation time data are extracted, the type of the current combustion working condition is recognized and judged, the statistical characteristic parameters are associated with hearth temperature field distribution, and prediction and fault diagnosis of the boiler combustion state are achieved; and performing time domain integrity test on the sound wave signal, detecting the abnormal condition of the signal and evaluating the effectiveness of temperature conversion, and when the time domain integrity is lower than a preset threshold value, triggering data quality alarm and adjusting the algorithm weight of conversion. According to the invention, real-time optimization and safe operation of the boiler combustion process can be realized.

The invention relates to a passive sound transmission module for a full face mask and the full face mask. The passive sound transmission module includes a base portion, a cover portion welded to the base portion, and a membrane member; the membrane component is fixed between the base part and the cover part in a tensioned state so as to transmit sound, and the base part is constructed to be provided with a lug protruding outwards in the radial direction so as to be installed on a mouth-nose mask of the full face mask; the cover portion is configured to have a mounting assist member extending upwardly from a top surface of the cover portion for grasping with a hand. The tensioned state of the membrane member is achieved by interference fit of the corresponding structures of the base and the cover. The full face mask is provided with the passive sound transmission module.

The utility model discloses a noise reduction sheet thickness detection device, and belongs to the technical field of noise reduction sheet thickness detection. A silencing sheet thickness detection device comprises a frame body, the frame body is provided with a driving assembly, a first transmission assembly, a second transmission assembly and a detection assembly, the first transmission assembly and the second transmission assembly are integrally distributed in a T shape, the first transmission assembly firstly transmits a to-be-detected silencing sheet and then transmits the to-be-detected silencing sheet to the detection assembly, and the second transmission assembly transmits the to-be-detected silencing sheet to the detection assembly. And the detection assembly is used for detecting whether the thickness of the silencing piece is qualified or not, if yes, the first transmission assembly continues to transmit the silencing piece, and if the detected thickness is not qualified, the detection assembly transfers the unqualified silencing piece to the second transmission assembly. According to the utility model, the thickness of the silencing sheet can be automatically detected, qualified products and inferior-quality products can be separated, the qualified products or the inferior-quality products can be automatically transmitted, the device can be adapted to a silencing sheet production line, manual operation is not needed, and the detection efficiency and the detection accuracy are greatly improved.

The invention discloses a sound insulation test box with a graphene sound absorption lining, and the sound insulation test box comprises a sound insulation box body, one side of the sound insulation box body is of an opening structure, and a sound absorption assembly is arranged in the opening of the sound insulation box body; the sound insulation box has the following beneficial effects that through the sound absorption assembly on the sound insulation box body, after a product generates noise in the sound insulation box, the noise can be absorbed and eliminated by the sound absorption assembly, that is, the perforated plate in the sound absorption assembly is located in the sound insulation box to form a lining structure; generated noise can be transmitted to the interior of the perforated plate, then transmitted to the interior of the sound absorption plate and transmitted to the wave absorption pieces in the grooves at the same time, the transmitted sound wave vibration enables the particles of the wave absorption pieces to collide and rub with each other, sound energy is converted into heat energy to be consumed, the irregular surfaces of the particles of the wave absorption pieces can scatter sound waves, and therefore the sound absorption effect is improved. Direct reflection energy is reduced, the effect of rapidly eliminating noise is achieved, and follow-up detection of products is facilitated.

A noise reduction airway device with a resonant cavity includes a housing having an air inlet and an air outlet, the housing constituting the resonant cavity and other chambers, and the other chambers may be only one chamber or may be one or more chambers including a first chamber and a second chamber. The resonant cavity constitutes a main noise reduction structure in the noise reduction airway apparatus and is configured as a cavity formed inside the housing. The noise reduction structure also includes a neck configured to communicate the resonant cavity and other chambers for transmitting sound waves into the resonant cavity for energy conversion. By controlling the position of the resonant cavity and various parameters of the resonant cavity and the neck, maximum noise reduction of the noise reduction airway equipment is achieved.

The application discloses a flexible joint with a sound attenuation function and a hydraulic forming method, which comprises a bellows, a flow guide pipe and an outer net. The bellows comprises a corrugated section and a resonant shell section; the flow guide pipe is installed in the bellows and forms a fluid channel inside, the flow guide pipe comprises a hose and an inner liner pipe, the inner liner pipe and the resonant shell section enclose a resonant cavity, and a through hole is formed in the inner liner pipe and communicates the channel and the resonant cavity; and the outer net is wrapped on the outer surface of the bellows. The structure can transmit sound waves to the resonant cavity through the through hole to excite resonance, prolong the sound wave path by using the corrugated structure, promote attenuation, and inhibit secondary noise by combining the outer net, so that excellent sound attenuation effects of multiple levels and wide frequency bands are achieved.

Disclosed is an electronic device. The electronic device may comprise: a housing including a sidewall that includes an audio hole; a mesh assembly fastened inside the audio hole; and a speaker that is disposed inside the housing and brought into contact with the audio hole to transmit sound outward via the audio hole. The mesh assembly is spaced apart from the speaker and may be disposed inside the audio hole.

A sound insulator includes the space forming portion which have an introduction portion that forms a transmission space for transmitting sound waves and introduces sound waves into the transmission space and a discharge portion for guiding the sound waves introduced into the transmission space to the outside of the transmission space. The sound insulator includes a phase adjustment portion that attenuates sound waves corresponding to the frequency of the sound waves whose phases have been changed among the sound waves transmitted through the transmission space by changing the phase of some of the sound waves transmitted through the transmission space. The phase adjustment portion changes the frequency band of the sound wave whose phase is to be changed.

The present application relates to a waveguide tube, a speaker assembly and an electronic device. The waveguide tube comprises a protrusion, and a sound inlet, a sound guide channel and a sound outlet which are in communication in sequence, wherein the sound inlet is configured to transmit sound waves into the sound guide channel; the sound outlet is configured to transmit sound waves out of the sound guide channel; and the protrusion is fixed on an inner wall of the sound guide channel, and extends in the direction from the sound inlet to the sound outlet. The speaker assembly in the embodiments of the present application has similar sound wave radiation angles at low and high frequencies, which is beneficial for improving the usage experience of users.

The application discloses a device for realizing low-frequency wideband sound absorption of a small-space acoustic test box, which comprises a box body, and a composite sound absorption layer is arranged on the inner wall of the box body, characterized in that the composite sound absorption layer comprises multiple air layers for sequentially propagating sound, a micro-slit plate is arranged on the sound input side of each air layer, and a porous sound absorption material and a bottom closed flat plate are arranged on the sound output side of the air layer for finally propagating sound. The size of the small-space acoustic test box is optimized by calculating the normal frequency distribution, the degeneration of low-frequency vibration modes is avoided, and the irregular distribution of low-frequency normal vibration mode frequencies is optimized. The low-frequency sound dyeing and comb filter effect in the small-space acoustic test box are reduced, and a high-fidelity sound test signal acquisition environment is realized.

This non-contact, simple configuration allows for highly accurate estimation of the viscosity of the object being measured. [Solution] A system comprising: a mixing means for mixing a first object and a second object having different specific gravities; a sound wave transmitting means for transmitting sound waves to the first object, the second object, or a mixture thereof; a sound wave receiving means for receiving sound waves transmitted from the sound wave transmitting means; and an estimation means for estimating the viscosity of the first object based on changes in the received signal received by the sound wave receiving means.

This application relates to a directional open-type AR glasses, including a frame and two temples symmetrically arranged on both sides of the frame. The upper end of the temple's tail has a groove. The glasses also include a housing, an audio module, and an adjustment component. The housing is combined with one side of the temple's tail. The housing has several sound outlets facing the auricle and towards the ear canal. The audio module is disposed within the housing and emits sound wave signals, transmitting these signals to the sound outlets so that the sound waves can propagate from the outlets towards the ear canal. The adjustment component is used to adjustably connect the housing to the temple's tail to adjust and position the sound outlet direction relative to the ear canal. This application enables directional sound emission, accurately transmitting sound to the ear canal, and allows for flexible adjustment of the angle and position of the sound-emitting components, making it convenient for users.

1. Name of the product in this design: Microphone. 2. Purpose of this design: To transmit sound. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

1. Name of the product in this design: Microphone. 2. Purpose of this design: To transmit sound. 3. The key design feature of this product is its shape. 4. The picture or photo that best illustrates the key design points: Design 1 3D diagram 1. 5. Design 1 is designated as the basic design.

The photo-acoustic conversion based sound emitter device has a sound output surface for transmitting sound wave vibrations to a medium outside the device. An optical waveguide, is used to transmit light through an optical path within the device. First and second photo-acoustic conversion volumes, at different distances from the sound output surface, are used for transmitting sound generated in the first and second volume to the medium via the sound output surface, the optical path extending directly or indirectly successively through the first and second photo-acoustic conversion volume. The device comprises an intermediate volume separating the first and second photo-acoustic conversion volumes along the optical path, the intermediate volume having a lower light absorption coefficient than the first and second photo-acoustic conversion volumes; and / or the first and second photo-acoustic conversion volume have a different cross-section area size and / or shape with virtual planes perpendicular to the optical path; and / or the first and second photo-acoustic conversion volumes have different optical absorption coefficients, or a different optical wavelength dependence of these optical absorption coefficients.

The utility model discloses a piezoelectric ceramic pickup sensor convenient to install, and relates to the sensor technology field, the piezoelectric ceramic pickup sensor comprises a sensor body, the inner wall of the sensor body is provided with two groups of grooves, the lower part of the sensor body is provided with an annular installation seat, the inner wall of the installation seat is provided with an inner cavity, and the inner wall of the installation seat is provided with two groups of grooves. The beneficial effects of the utility model are that the arrangement of the sensor body can install internal elements, the arrangement of the groove can transmit sound waves, the arrangement of the installation seat and the inner cavity can install the main body, and the clamping assembly can be limited at the same time. And meanwhile, the clamping assembly is protected, three limiting blocks and limiting holes are arranged, the fixing assembly can be fixed, meanwhile, the threaded rod can be limited, and the threaded rod and a rotating disc handle can be matched with the fixing assembly to be used for installing the main body.

The present invention relates to a passive acoustic transmission module for a full-face mask and a full-face mask. The passive acoustic transmission module includes a base portion, a cover portion welded to the base portion, and a diaphragm member; the diaphragm member is fixed in a tensioned state between the base portion and the cover portion to transmit sound; the base portion is configured to have a tab which protrudes radially outward and is used for mounting onto an oronasal mask of the full-face mask; and the cover portion is configured to have a mounting auxiliary member extending upward from a top surface of the cover portion for allowing a hand to grasp. The tensioned state of the diaphragm member is achieved by an interference fit between corresponding structures of the base portion and the cover portion. The full-face mask has the passive acoustic transmission module described above.

A vehicle has at least one axles with wheels operated by at least one electric motor; a sound transmission system transmits a sound indicative of the operation of the axle inside the passenger compartment; said sound transmission system has at least one acoustic conduit provided with an inlet mouth arranged in the area of the axle and / or of the electric motor and with an outlet opening arranged in the area of the passenger compartment.

An open-back headphone and its wearing method are disclosed. The open-back headphone includes a main body and at least one sound guide tube. The main body includes a sound-producing unit with a mounting cavity; the sound-producing unit is mounted within the mounting cavity; the sound guide tube is connected to the main body and has at least one sound-guiding channel, the sound-guiding channel communicating between the mounting cavity and the outside; wherein, the sound guide tube is movably connected to the main body and is adapted to extend into the user's ear canal. The open-back headphone not only transmits sound to the user's ear through the sound guide tube, but also allows the open-back headphone, through which the sound is transmitted via the sound guide tube, to be worn relatively stably in the user's ear.

The present invention relates to a glass assembly for a vehicle, which is suitable for emitting sound waves. The glass assembly includes a glass assembly having a first surface suitable for being disposed inside the vehicle and a second surface suitable for being disposed outside the vehicle. The glass assembly includes at least one first exciter and at least one second exciter.