54 results about "Acoustical resistance" patented technology

The invention relates to the technical field of railway vehicles, and provides a sound absorption device and a railway vehicle. In the sound absorption device, a surrounding plate structure and a flexible film in sealed connection form a closed cavity, at least one through hole is formed in the flexible film, hollow pipes and the through holes are arranged in a one-to-one correspondence mode, one ends of the hollow pipes are inserted into the corresponding through holes, and the other ends of the hollow pipes penetrate through a sound absorption structure and extend to an interval space between the sound absorption structure and a cavity bottom. And a coupling resonance sound absorption system of the flexible film, the hollow pipe, the interval space and the closed cavity is formed. According to the sound absorption device, the sound resistance and the sound quality are improved through the hollow pipe, the resonance frequency is made to move to the low frequency in cooperation with dual coupling resonance of the flexible film and the hollow pipe and dual coupling resonance of the hollow pipe and the cavity, and low-and-medium-frequency noise of 100-500 Hz is efficiently absorbed; the two types of coupling resonance cooperate to broaden the sound absorption frequency band, and the sound absorption structure is attached to the flexible film to enhance the sound energy dissipation efficiency. Efficient low-frequency sound absorption can be achieved without increasing the size, the requirements for light weight and thinness of railway vehicles are met, and the noise control effect is improved.

The subject matter of the invention is an acoustic absorption structure comprising a unit structure interposed between an acoustic resistive layer and a reflective layer, the unit structure comprising walls delimiting cells, and for at least one cell, the unit structure comprising: at least one and at most three L-shaped partitions, the at least one and at most three L-shaped partitions are impermeable and spaced apart from each other, and define a straight compartment and at least one L-shaped compartment; and an angled, acoustically resistive porous separator in each L-shaped compartment, the angled, acoustically resistive porous separator having a perforation rate of less than or equal to 15%, and dividing the L-shaped compartment into a first region and a second region, thereby forming two types of resonators. This arrangement makes it possible to increase the frequency range of the processed acoustic waves. Another subject of the invention is an aircraft comprising at least one such sound absorbing structure.

The utility model relates to the technical field of electronic microphones, and discloses a vibration-proof noise-reduction silicon microphone, which comprises a metal shell, the inner wall of the metal shell is fixedly connected with a mounting seat, the inner wall of the mounting seat is provided with a noise-reduction sound-transmission assembly, the inner wall of the metal shell is fixedly connected with an elastic steel sheet, and the elastic steel sheet is provided with a vibration-reduction sound-transmission assembly. The inner wall of the elastic steel sheet is fixedly connected with four silica gel supports in a circumferential array, and a substrate is arranged in the metal shell. According to the silicon microphone capable of preventing vibration and reducing noise, noise interference can be effectively reduced and the definition and the purity of audio acquisition can be improved through the arrangement of the noise reduction sound transmission assembly and the acoustic resistance matching film, and then low-frequency vibration can be absorbed and the transmission efficiency of mechanical energy can be reduced through the action of the silica gel bracket and the micro spring; under the action of the silica gel shock pad, high-frequency shock can be reduced, and meanwhile, the elastic steel sheet can provide buffering of low-and-medium-frequency shock, so that multi-stage shock absorption can be formed, the audio quality can be remarkably improved, and the device can keep stable performance output in various environments.

The present invention discloses a head-mounted flat-panel headset with a vibration-optimized flat-panel sound-emitting unit, comprising: earmuffs including an outer shell and a flat-panel sound-emitting unit mounted in the outer shell; a headband having elasticity, with two earmuffs mounted on both ends of the headband respectively; a telescopic structure having one end connected to the headband and the other end connected to the earmuffs, and the telescopic structure is capable of adjusting the relative position of the earmuffs and the headband; the flat-panel sound-emitting unit comprises a planar diaphragm and an upper shell and a lower shell arranged in parallel on two side surfaces of the planar diaphragm, a plurality of permanent magnets being provided on the lower side surface of the upper shell, and a plurality of permanent magnets being provided on the upper side surface of the lower shell; a planar coil having an "S"-shaped pattern is formed on the upper and lower side surfaces of the planar diaphragm; an upper acoustic resistance plate is fittedly mounted along each magnetic pole surface of the permanent magnet on the lower side surface of the upper shell, and a lower acoustic resistance plate is fittedly mounted along each magnetic pole surface of the permanent magnet on the upper side surface of the lower shell; and the acoustic resistance plate is made of a metal sheet with a thickness of 0.1-0.2 mm.

This invention discloses a porous Helmholtz resonator with adaptively adjustable sound absorption frequency band, belonging to the fields of noise control and virtual reality technology. It comprises a sound-absorbing structure consisting of a rotating perforated panel, a fixed perforated panel, and a perforated porous material plate arranged sequentially from top to bottom, as well as an adaptive adjustment system composed of a sound pressure sensor, a controller, and a motor. The motor drives the rotating perforated panel to rotate via gear transmission, changing the perforation overlap area; the perforated porous material plate compensates for acoustic impedance, maintaining sound absorption performance. The controller pre-stores spectral data at different rotation angles and selects the optimal rotation angle by comparing the real-time noise spectrum with the pre-stored data. This invention achieves adaptive adjustment of the sound absorption frequency band, maintains a high sound absorption peak value over a wide parameter range, is suitable for large-area deployment, has a compact structure, and low cost, and can be used for noise control and auditory virtual scenes.

The invention relates to the technical field of focused ultrasound, in particular to a focused ultrasound path optimization method and system for a tumor bone metastasis focus. The method comprises the following steps: firstly, acquiring each candidate sound beam path of a transducer array and a unit path comprising each transducer; further obtaining an energy consumption coefficient according to the spatial distribution and acoustic resistance of voxels on the target path; further obtaining a damage coefficient according to the normal vector deviation corresponding to each skeleton interface voxel on the target path in combination with the spatial distribution of the skeleton interface voxels; further obtaining the path optimization degree according to the overall distribution of the energy consumption coefficient and the damage coefficient; and finally, selecting an optimal sound beam path based on the path optimization degree. According to the method, the energy consumption of each candidate sound beam path and the bone interface injury risk are quantified, the path optimization degree is comprehensively evaluated, automatic optimization of safe and efficient paths in bone metastasis focus focused ultrasound treatment is achieved, and the problem that in the prior art, a multi-path comprehensive optimization mechanism is lacked is solved.

The invention discloses a loudspeaker unit with an acoustic resistance adjusting function. The vibrating diaphragm of each unit is a folding ring type rectangular vibrating diaphragm; wherein the folding ring type rectangular vibrating diaphragm comprises a folding ring area and a hollow part arranged at the center of the folding ring area; the hollow part is covered with a fine-hole net-shaped layer; the outer side face of the fine-hole net-shaped layer is covered with a middle film, and the covering ratio of the middle film ranges from 30% to 70%. The fine-hole net-shaped layer provides a channel for heat dissipation. The middle film covers the outer side of the fine-hole net-shaped layer, and the covering ratio is 30%-70%. When sound waves are transmitted from the vibrating diaphragm to the fine-hole net-shaped layer and then propagated outwards, the intermediate diaphragm can change the propagation path of the sound waves. Due to partial covering of the middle film, sound waves can meet different medium interfaces (an interface between the middle film and air) in the propagation process, so that reflection and transmission phenomena are generated, namely, acoustic resistance is adjusted, and energy distribution of the sound waves is more reasonable.

An acoustic absorption structure including at least one cellular structure between an acoustically resistive layer and a reflective layer. The cellular structure includes a first face in contact with the acoustically resistive layer, a second face in contact with the reflective layer, and a multitude of cells each discharging at the level of the first and second faces, each cell being delimited by at least one partition, wherein the cellular structure comprises at least one partitioning enclosure positioned in one of the cells of the cellular structure and connected to at least one partition delimiting the cell. The partitioning enclosure separates an interior zone inside the partitioning enclosure and an exterior zone situated in the cell and outside the partitioning enclosure. The partitioning enclosure includes at least one through-orifice configured so that the interior and exterior zones communicate.

The invention discloses a fan cavity noise reduction device, a control method and an air conditioner, the fan cavity noise reduction device is applied to a fan cavity, and the fan cavity noise reduction device comprises a micro-perforated plate arranged in the fan cavity, and the micro-perforated plate comprises a back cavity. The micro-perforated plate can be regarded as an acoustic element with acoustic resistance and acoustic quality, the micro-perforated plate is installed in front of the back cavity, a certain cavity is reserved behind the back cavity, in this way, a resonance sound absorber can be formed, and noise reduction is conducted on the fan cavity through the resonance sound absorption effect. In addition, different micro-perforated plate specification parameters such as the thickness, the hole diameter and the back cavity depth of the micro-perforated plate can be set based on the actual situation, the specification parameters can influence the sound absorption coefficient of the structure, and therefore the micro-perforated plate specification parameter most conforming to the actual scene is selected, and the fan noise control effect is improved.

The application discloses a kind of microphone assembly and extractor hood for active noise reduction, and microphone assembly for active noise reduction includes: microphone and flow guide cover, flow guide cover is oppositely arranged with the pickup surface of microphone;There is a gap for pickup between flow guide cover and pickup surface, and the gap is communicated with the pickup hole of microphone.The application is by additionally adding flow guide cover, so that and there is a gap for pickup between flow guide cover and the pickup surface of microphone, sound can directly enter the pickup hole of microphone through the gap, since narrow gap will form acoustic resistance, most airflow flows away from the surface of flow guide cover, a small part of airflow will enter the gap, but flow speed will be reduced, and flow is smooth, without changing flow direction directly from the gap, so airflow will not enter pickup hole, airflow can directly flow out through the gap, avoid producing wind noise, drainage without introducing wind noise, without affecting microphone to collect sound signal, to improve the noise reduction effect of active noise reduction.

The application discloses a self-focusing ultrasonic transducer, a sweeping robot and an acoustic impedance calculation method, and relates to the technical field of self-focusing ultrasonic transducers.The self-focusing ultrasonic transducer comprises a support, the bottom of the support is provided with a concave spherical surface, the periphery of the concave spherical surface is provided with an annular plane, the upper end of the support is provided with a connecting joint; a cross-linked polypropylene piezoelectric electret film, the upper and lower surfaces of the cross-linked polypropylene piezoelectric electret film are printed with conductive silver paste and covered in the concave spherical surface; a shielding wire, one end of the shielding wire is connected with the lower surface edge of the cross-linked polypropylene piezoelectric electret film, and the other end is connected with the connecting joint and used as a positive electrode; a silver film, the silver layer is plated on the surface of the support, the upper surface of the cross-linked polypropylene piezoelectric electret film is connected with the connecting joint and used as a negative electrode. The self-focusing ultrasonic transducer can realize self-focusing of acoustic energy, and can identify and detect the acoustic resistance of a reflected object, identify different materials of the reflected object, and control the robot to switch different working modes according to different materials.

The invention relates to an exhaust silencer of a pneumatic jumbolter and a working method of the exhaust silencer, and belongs to the field of noise control. Comprising an expansion chamber, a connecting sleeve, a resonant cavity, a sensor, a controller, a telescopic motor, a conical perforated plate and a porous sound absorption material, the expansion chamber telescopic section is provided with an air inlet, and the outer wall of the fixed section is provided with a telescopic motor; a through hole is formed in the connecting sleeve and is used for connecting the expansion chamber shell and the resonant cavity; the sensor is mounted on the connecting sleeve to receive and convert noise signals; the controller is installed at the top of the connecting sleeve and controls movement of the telescopic motor. The conical perforated plate is mounted in the resonant cavity to increase acoustic resistance of sound waves and reduce aerodynamic noise; and the porous sound absorption material is arranged at the tail end of the silencer, so that the silencing effect is further enhanced. The problems that in the prior art, the noise reduction effect is poor and the exhaust resistance is large due to the fact that the internal structure of a silencer is single are solved, automatic adjustment can be achieved according to the noise intensity, and the effect that the exhaust resistance is effectively reduced while noise reduction is guaranteed is achieved.

The invention relates to an acoustic attenuation panel comprising at least one acoustic resistive layer (42), at least one reflective layer (46), at least one honeycomb structure (44) and at least one C-shaped reinforcement (50) interposed between the acoustic resistive layer (42) and the reflective layer (46), and at least one expandable core (52), an expandable core (52) is positioned between the first wing and the second wing of the C-shaped reinforcement (50), the expandable core increasing in volume during a polymerization cycle. By means of this expandable core (52) there is no need to provide two polymerization cycles, one of which makes it possible to reinforce the C-shaped reinforcement (50). The invention also relates to a method for manufacturing such an acoustic attenuation panel.

The present application belongs to the technical field of turbofan engine muffler liner design, and specifically relates to a method for determining the acoustic impedance of a turbofan engine muffler liner, comprising: step 1, calculating the acoustic impedance r of the muffler liner affected by high sound intensity. n ; Step 2: Calculate the acoustic resistance r of the muffler lining affected by tangential flow g ; Step 3, considering the influence of high sound intensity and tangential flow, according to the velocity amplitude V of the sound particle in the small hole o , mainstream speed V g The relative size of the sound insulation is used to calculate the acoustic resistance r of the sound insulation lining in sections; Step 4, calculate the correction coefficient δ of the sound insulation lining end due to the combined influence of tangential flow and high sound intensity; Step 5, consider the combined influence of tangential flow and high sound intensity to calculate the acoustic reactance χ of the sound insulation lining; Step 6, comprehensively consider the acoustic resistance r and acoustic reactance χ of the sound insulation lining to calculate the acoustic impedance z of the sound insulation lining.

This invention discloses a high-resistivity piston-type loudspeaker, belonging to the field of acoustic-to-electric conversion. The invention includes a base 010, a driving component 020, a diaphragm 030, a connecting component 040, and a vibrating cavity 050. The connecting component 040 is not coplanar with the diaphragm 030, i.e., it is a concealed connection structure. The driving component 020 drives the diaphragm 030 to produce a piston-like movement. The diaphragm 030 is located inside the cavity 050, and the displacement range of the diaphragm 030 in the vertical direction is within the cavity height range formed by the support structure extending along the thickness direction of the base, thereby reducing air leakage and increasing the sound pressure level during loudspeaker operation. Based on the piston-type loudspeaker with a concealed connection structure, further optimization of the loudspeaker's diaphragm structure and support structure controls air leakage during loudspeaker operation, further increasing the acoustic impedance of the front and rear cavities and the loudspeaker's output sound pressure level.

This invention relates to a bulk acoustic wave resonator, comprising: a substrate; an acoustic mirror; a bottom electrode; a piezoelectric layer; and a top electrode, wherein: the piezoelectric layer comprises a first layer and a second layer, an acoustic resistive layer is disposed between the first layer and the second layer, the inner edge of the acoustic resistive layer is located inside the boundary of the acoustic mirror in the horizontal direction, the acoustic resistive layer is different from the acoustic resistive layer; and the material of the first layer is different from the material of the second layer. This invention also relates to a bulk acoustic wave resonator assembly, a method for adjusting the electromechanical coupling coefficient of a bulk acoustic wave resonator, a method for adjusting the difference in electromechanical coupling coefficients of resonators in a bulk acoustic wave resonator assembly, a filter, and an electronic device.

Disclosed in the present application are a speaker device, a vehicle audio system, and a vehicle. The speaker device comprises a housing, a speaker mechanism and an acoustic resistance mechanism, wherein the housing is provided with an opening and a sound outlet; the speaker mechanism is arranged in the housing and, together with the housing, forms a cavity, both the opening and the sound outlet being in communication with the cavity; and the acoustic resistance mechanism is arranged in the opening. Sound waves emitted by the speaker mechanism radiate outward from the sound outlet through the cavity; by providing the housing with the opening in communication with the cavity and providing the acoustic resistance mechanism at the opening, Helmholtz resonance in the cavity is mitigated, and the acoustic structure of the cavity is changed, such that peaks and valleys in the frequency response are suppressed, thereby flattening a frequency response curve, improving sound quality. By means of the application of the speaker device, the vehicle audio system has good sound quality. By means of the application of the speaker device or the vehicle audio system, the vehicle has good sound quality.

The invention discloses a structural dry-wet response conversion and underwater noise calculation method based on an acoustic impedance matrix, and the method comprises the steps: obtaining the vibration mode of an overall structure, obtaining a mode shape matrix, carrying out the forced response test of the overall structure, and obtaining the node vibration response of the overall structure. A modal participation coefficient is calculated through inversion or a regularization method, a modal with the modal participation coefficient being 0 is eliminated, response expression is updated, an immersed surface acoustic radiation impedance matrix is calculated, a modal participation coefficient vector after immersion is calculated, underwater vibration response of the structure is calculated, and underwater acoustic radiation is calculated according to immersed surface vibration response distribution and an acoustic radiation acoustic resistance matrix. According to the vibration response of the structure in the light medium and the acoustic impedance matrix of the underwater immersion surface of the structure, the prediction of the underwater vibration response and sound field distribution of the structure is realized; the method can overcome the problems of high difficulty in underwater testing, low fluid-solid coupling calculation efficiency and the like, and is a new method for conveniently and efficiently obtaining the underwater vibration sound response of the structure.

The invention discloses a three-way limiting type sound barrier vibration isolation support, and belongs to the technical field of building vibration reduction and isolation. The support comprises a vibration isolation rubber support upper connecting plate, a vibration isolation rubber support lower connecting plate and a vibration isolation rubber support body formed by overlapping and vulcanizing a plurality of layers of steel plates and rubber. The innovation lies in that a horizontal limiting mechanism is arranged between the upper connecting plate and the lower connecting plate, the mechanism is composed of an inner anti-shearing frame and an outer anti-shearing frame, a friction pair is formed by a polytetrafluoroethylene plate and a stainless steel plate on the mechanism, and horizontal limiting and sound bridge blocking are achieved; the horizontal limiting mechanism is further provided with a vertical limiting mechanism composed of a limiting guide groove and an anti-shearing bolt. The upper connecting plate is provided with a pre-pressing limiting mechanism enabling the support body to be in a pre-compression state. Horizontal and vertical limiting functions are integrated, horizontal vibration and vertical vibration are effectively isolated, meanwhile, a noise transmission path is cut off, and the comfort and safety of building structures such as a subway upper cover are remarkably improved.

A device configured to generate an air flow, the device including: a compressor; an air flow duct arranged to convey a flow of air generated by the compressor; a gas-filled cavity disposed beside the air flow duct; a wall separating the air flow duct and the cavity, the wall including at least one aperture; and an acoustic resistive screen covering and held in tension over the aperture of the wall. The screen is partially permeable and in fluid contact with air in the air flow duct and gas in the cavity and is configured to attenuate noise transmitted between the duct and the cavity. The resistive screen and the cavity together define a noise-damping resonator.

A micro-electromechanical systems (MEMS) package comprising: a MEMS package comprising a substate and a lid coupled to the substrate; a piezoelectric valve coupled to the substrate and comprising a number of movable members operable to be deformed in opposite directions upon application of a voltage to modify an acoustic resistance of an acoustic port; and a first stopper defined by the substrate and a second stopper defined by the lid, the first stopper and the second stopper being aligned with the number of movable members and operable to prevent an undesirable deflection of the number of movable members.

The utility model discloses a surface acoustic wave resonator, relates to the technical field of radio frequency devices, and aims to solve the problem that a surface acoustic wave resonator in the prior art is only suitable for low-frequency narrow bands. The surface acoustic wave resonator comprises a supporting substrate, an acoustic resistance matching layer, a bonding layer, a piezoelectric layer and an electrode. The supporting substrate, the acoustic resistance matching layer, the bonding layer and the piezoelectric layer are sequentially arranged in a stacked mode. And the acoustic resistance matching layer is bonded with the piezoelectric layer through the bonding layer. The crystal sound velocity corresponding to the support substrate is greater than the crystal sound velocity corresponding to the piezoelectric layer. The electrode is arranged on the side, away from the bonding layer, of the piezoelectric layer. The working bandwidth of the surface acoustic wave resonator provided by the utility model is greater than or equal to 600MHz; and / or, the working frequency band of the surface acoustic wave resonator comprises an N79 frequency band.

The utility model discloses an open type wearable earphone with a resonance structure, and relates to the field of earphones, and the earphone comprises an earphone shell which is provided with an accommodation cavity; the loudspeaker is arranged in the earphone shell and divides the accommodating cavity into a front cavity and a rear cavity; the earphone shell is provided with a sound leakage hole, and the sound leakage hole is communicated with the rear cavity. The resonance structure is arranged in the rear cavity, and the resonance structure and the sound leakage hole are arranged in a staggered manner; and the resonance structure is provided with a sealing cavity and an acoustic resistance adjusting hole, and the acoustic resistance adjusting hole is respectively communicated with the sealing cavity and the rear cavity. Compared with the prior art, sound energy limitation is not carried out on a normal sound production path, the resonance structure is arranged in the rear cavity, the main sound output path and the acoustic path of the sealing cavity are mutually independent, the normal sound production efficiency of the earphone can be fully reserved, the leakage sound is subjected to a damping effect in the transmission process through acoustic resonance, and the sound transmission efficiency is improved. Therefore, sound leakage is reduced on the premise that normal sound transmission is not interrupted and normal sound production quality is not reduced.

An acoustic attenuation panel with at least one acoustically resistive layer, at least one reflective layer, at least one cellular structure and at least one C-shaped reinforcement which are interposed between the acoustically resistive and reflective layers, and at least one expandable core, positioned between the first and second wings of the C-shaped reinforcement, which increases in volume during a polymerization cycle. Also a method for manufacturing such a panel.

The present application relates to a bulk acoustic wave resonator, comprising: a substrate; an acoustic mirror; a bottom electrode; a piezoelectric layer; and a top electrode, wherein: the piezoelectric layer comprises a first layer and a second layer, the second layer is above the first layer in a thickness direction of the resonator; the resonator further comprises a connecting-end acoustic resistance layer provided at an electrode connecting end of the top electrode, an inner edge of the connecting-end acoustic resistance layer is inside an acoustic mirror boundary in a horizontal direction; an outer end edge of the first layer and / or the second layer is inside an outer edge of the connecting-end acoustic resistance layer in the horizontal direction. The present application also relates to a bulk acoustic wave resonator assembly, a filter and an electronic device.

The utility model belongs to the technical field of loudspeakers, and discloses a loudspeaker housing and a loudspeaker, the loudspeaker housing comprises a first housing and a second housing, the first housing comprises a first bottom plate, a first wall plate and a first boss, the first wall plate and the first boss are enclosed on the first bottom plate to form a first accommodating groove, and the second bottom plate is provided with a second accommodating groove. The first shell comprises a first bottom plate, a first wall plate and a first boss, the second shell comprises a second bottom plate, a second wall plate and a second boss, the second wall plate and the second boss define a second containing groove on the second bottom plate, the second boss is provided with a communicating groove, the first boss and the communicating groove define a pressure relief hole, at least part of the pressure relief hole extends in an arc line or a broken line, and the loudspeaker comprises the loudspeaker shell. According to the utility model, the first boss and the communicating groove are enclosed to form the pressure relief hole, so that the pressure relief hole is not limited by the thickness of the side wall of the loudspeaker shell, the processing cost of the pressure relief hole is lower, the size adjustment is more convenient, the acoustic resistance adjustment range at the pressure relief hole is effectively improved, and the acoustic resistance adjustment at the pressure relief hole is simpler and more convenient.

An ultrasonic sensor includes a piezoelectric body, an acoustic impedance matching layer, a stress balancing layer, and a damping body, the stress balancing layer is in contact with the piezoelectric body, the stress balancing layer has a hardness greater than that of the damping body, and the stress balancing layer has an acoustic impedance less than 5 MRayl.

Acoustic absorption structure comprising compartmentalized cells combining several types of resonators. The invention relates to an acoustic absorption structure comprising a honeycomb structure (62), interposed between an acoustically resistive layer (64) and a reflective layer (66), which includes walls (68) delimiting cells (70) and, for at least one cell (70): at least one and at most three L-shaped partitions (72, 72'), impermeable and spaced apart, which delimit a straight compartment (70.1) and at least one L-shaped compartment (70.2, 70.3), in each L-shaped compartment (70.2, 70.3), an inclined acoustically resistive porous partition (80, 80') which has an openness ratio less than or equal to 15% and divides the L-shaped compartment (70.2, 70.3) into first and second zones (80.1, 80.2, 80.1', 80.2') forming two types of resonators. This arrangement increases the frequency range of the processed acoustic waves.The invention also relates to an aircraft comprising at least one such acoustic absorption structure. Figure 7.

The present application relates to the technical field of sound barriers, and provides a wide-frequency optimization method and system for a composite sound barrier and a computer, the wide-frequency optimization method comprising: obtaining a cavity shape correction amount, a neck end effective length correction amount and a thermal viscous acoustic resistance, and constructing a resonator parameterization module; obtaining a target frequency band; obtaining a frequency matching degree term, a bandwidth coverage degree term and a structure compactness term, and composing a multi-objective optimization function; based on the resonator parameterization module and the multi-objective optimization function, using a particle swarm optimization algorithm improved by introducing acoustic structure experience rules and feasible solution priority rules to obtain final resonator size data sets; based on the final resonator frequency, determining a labyrinth passage length, and based on the target frequency band, determining a labyrinth passage cross-sectional size, to design a labyrinth phase modulation plate unit; and constructing a composite sound barrier. Through the above method, a composite sound barrier with low-frequency performance, light structure and wide-frequency coverage can be efficiently designed.