131 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 utility model discloses a noise reduction assembly applied to a cutting device. In an inner cavity of a cutting platform of the cutting device, a connecting piece is vertically arranged under the position where a cutting assembly carries out cutting action; one end of the connecting piece is connected with the top of the inner cavity, the other end of the connecting piece is pre-buried in the ground, sound waves can be conducted into the ground surface, and the inner cavity is filled with sound absorption cotton; the utility model further discloses a light steel keel cut-off machine, the cutting assembly is arranged on the cutting platform and can move synchronously with the position, to be cut, of the light steel keel, and in the moving process, the light steel keel is cut; the lead screw pair mechanism is arranged on the upper surface of the cutting platform and used for driving the cutting assembly to do reciprocating motion in the moving direction of the light steel keel. The light steel keel structure further comprises the noise reduction assembly, noise generated when the light steel keel is cut off is basically eliminated, the field operation environment is improved, and the harm of the noise is reduced.

The invention discloses a phase shift migration-based ultrasonic array imaging method for defects in a steel ingot, which comprises the following steps of: performing two-dimensional Fourier transform on full-matrix time domain data obtained by ultrasonic array detection of the steel ingot to obtain a two-dimensional frequency spectrum of the full-matrix data, and establishing a relationship between a transmitting sound field and a receiving sound field; and gradually extrapolating the sound field through a phase shift factor in the depth direction, recovering a time domain sound field signal through two-dimensional inverse Fourier transform, and obtaining a focusing imaging result in the steel ingot according to the correlation between the transmitted sound field and the received sound field. The method has the characteristics that the image resolution is improved, the method adapts to sound velocity change in a complex medium, complex calculation is not needed, and the calculation efficiency is high.

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).

The utility model discloses a multi-tuning fork mechanical leakage listening rod, which relates to the technical field of pipeline detection and comprises a supporting rod, a mounting rod is mounted at the top of the supporting rod, a leakage listening assembly is arranged at the bottom of the supporting rod, and a connecting rod for adjusting the use length is arranged at the top of the supporting rod. And sound transmission rods are arranged in the connecting rod and the mounting rod. The beneficial effects of the utility model are that the first flange plate and the second flange plate are fixed through the bolts, and the connecting rod can be installed between the supporting rod and the installation rod, thereby achieving the effect of adjusting the use length, avoiding the problem of insufficient length during the detection of a deeper underground pipeline, and improving the detection precision through arranging a plurality of groups of tuning forks. The sound frequency can be distinguished more finely, the sensitivity and accuracy of water leakage detection are improved, the tuning fork transmits sound to the sound transmission rod through the sound listening rod, and the sound amplification cover amplifies the sound transmitted by the sound transmission rod.

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.

1. The name of this design product: interpretation machine (for scenic spot explanation). 2. Purpose of this design product: used for transmitting sound and amplifying sound. 3. The key design feature of this product is its shape. 4. The picture or photo that best illustrates the design points: Stereoscopic drawing 1.

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 utility model discloses a column loudspeaker and an intelligent device, and the column loudspeaker comprises a housing which is provided with a plurality of full-frequency units and at least one high-frequency unit. The sound output normal of the at least one high-frequency unit and the sound output normal of the at least one full-frequency unit are arranged in different directions. In the above design, the housing is provided with a plurality of full-frequency units and at least one high-frequency unit, and the high-frequency unit can compensate the high-frequency loudness loss of the full-frequency units, thereby effectively improving the full-frequency effect, enabling the loudspeaking sound to have a stronger layering sense, and improving the sound quality. And the sound output normal of the high-frequency unit and the sound output normal of the full-frequency unit are arranged in different directions, so that sound transmission in a larger direction range can be realized, sound diffusion is stronger, namely, a sound field in a larger range is generated, the sound column loudspeaker has a better hearing effect, and a user can obtain better experience.

The invention provides a pickup system. The pickup system comprises a microphone, a transmitter and a receiver, the microphone is provided with a first circuit board, a first antenna and a microphone; the transmitter is provided with a second circuit board and a second antenna, and the second circuit board is electrically connected with the second antenna; the receiver is provided with a third circuit board and a third antenna, and the third circuit board is electrically connected with the third antenna; the first antenna, the second antenna and the third antenna are in wireless signal connection in sequence. A user wirelessly transmits sound to the transmitter on the body through the microphone on the body, and then the transmitter wirelessly transmits the sound to the receiver assembled at the camera end, so that the sound is finally directly transmitted to the camera by the receiver to be stored, and the advantages of convenience and high efficiency are achieved. Compared with a wired connection mode of the microphone and the transmitter in the prior art, the wireless connection mode of the microphone and the transmitter has the advantages that wearing is convenient, and sound transmission interruption caused by accidental pull-apart of a circuit does not need to be worried.

An acoustic transmission enhancer includes a resonance-based metamaterial. An acoustic transmission enhancement system comprising: a material in a medium; the metamaterial based on resonance is positioned on the material; and a transducer that emits acoustic waves through the medium to the material and the metamaterial.

The present invention relates to a water hammer and water leakage detection system which makes it possible to detect pressure waves, propagated in a pipe by water hammer of a piping system, and a water leakage sound, at the moment a water leakage occurs due to the effects of the pressure waves, and thereby estimate the water leakage position and analyze the effects of the water hammer on the water leakage position. More specifically, the water hammer and water leakage detection system comprises: remote pipe abnormality detection devices (1) which are installed at respective measurement points designated spaced apart in the pipe and, when water hammer is detected according to pressure, generate and transmit sound data before and after the water hammer; and a pipe abnormality analysis device (2) which, when sound data is transmitted from a plurality of the measurement points in response to the occurrence of water hammer, detects the magnitude of the water leakage sound according to the sound change at each of the measurement points before and after the water hammer, detects a water leakage section according to a distance attenuation constant for each section calculated using the magnitude of the water leakage sound at each of the measurement points, and estimates the water leakage position.

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 invention belongs to the technical field of acoustics, and relates to an earphone. The earphone comprises an earphone body, a wearing structure and a sound transmission structure, a transducer is arranged in the earphone body, the wearing structure is connected to the earphone body, and the sound transmission structure is arranged between the wearing structure and the earphone body and used for transmitting sound emitted by the transducer to the position near an auditory meatus opening of an auricle; when the earphone is in a wearing state, the wearing structure is located outside the auditory meatus opening, and at least part of the wearing structure is clamped in the auricular conchae of the auricle in an abutting mode, so that the earphone body is located outside the auricular conchae. According to the earphone provided by the invention, the wearing structure is clamped in the auricular conchae to realize wearing, so that the earphone is not easy to loosen or fall off in sports or activities. And the wearing structure of the earphone is located outside the ear canal opening, so that the sound emitted by the transducer is prevented from directly entering the ear canal, the hearing of the user can be effectively protected from being damaged, and the earphone is not easy to cause discomfort after being worn for a long time.

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 fireproof isolation totally-closed sound barrier which comprises an arch-shaped support installed above a road, the arch-shaped support is provided with a plurality of standard sound barrier units distributed in the longitudinal direction of the road, and a fireproof isolation belt distributed in the transverse direction of the road is arranged every a plurality of spans. The fireproof isolation belt is composed of at least one full-metal sound barrier unit. The standard sound barrier unit of each span comprises a plurality of light-transmitting sound insulation screen bodies which are located on the top and spliced in the transverse direction of a road and a plurality of metal sound absorption screen bodies which are located on the side and spliced in the vertical direction. Each all-metal sound barrier unit comprises a plurality of metal sound absorption screen bodies which are located on the top and spliced in the transverse direction of the road and a plurality of metal sound absorption screen bodies which are located on the side and spliced in the vertical direction. The metal screen bodies with the proper width are arranged in the longitudinal direction of the totally-closed sound barrier at intervals of a certain length, the overall fireproof grade of the totally-closed sound barrier is improved, and losses caused by fire hazards are reduced.

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.

An acoustic device (100) and a method of using the same. The sound channel (11) extends through the housing (10) of the acoustic device (100) between the sound inlet (11i) and the sound outlet (11o). The sound inlet (11i) is configured to receive a sound input (S i) from an external environment (Ex). The sound outlet (11o) is configured to convey the sound output (So) passing through the sound channel (11) to the ear canal (Ec). A resonant cavity (C) is enclosed within the housing (10) and is in acoustic communication with the sound channel (11) for inducing a corresponding acoustic resonance (A) in a frequency transmission spectrum (So / Si) of sound passing through the sound channel (11). The adjustment mechanism (12) is configured to adjust the size (L1, L2) of the resonant cavity (C) to control the frequency (F) of the acoustic resonance (A) in the frequency transmission spectrum (So / Si).

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.

1. Name of the product in this design: Microphone (Q2). 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.

The utility model relates to the technical field of sound boxes, in particular to a remote directional sound box which comprises a box body, a loudspeaker arranged in the box body and a spiral air guide pipe arranged in the box body and located in front of the loudspeaker, the spiral air guide pipe is of a cylindrical structure, and a spiral acceleration guide groove is integrally formed in the inner wall of the spiral air guide pipe; according to the utility model, not only can sound waves be linearly pushed farther, but also the sound can be well focused and accurately projected to a specified area, the interference to the surrounding environment can be reduced, the definition of the sound can be improved, and the device can be well suitable for use occasions requiring long-distance directional sound transmission.

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.