159results about How to "Improve acoustic performance" patented technology

The invention discloses a sound production monomer and electronic equipment, and relates to the technical field of sound energy conversion, the sound production monomer comprises a shell, a magnetic circuit system and a vibration system, the magnetic circuit system comprises a support plate, a center magnetic circuit and a side magnetic circuit, the support plate is made of a magnetic conductive material, and a magnetic gap is formed between the center magnetic circuit and the side magnetic circuit; the central magnetic circuit comprises a first magnet, a concentrating flux plate and a second magnet, the side magnetic circuit comprises a first side magnet, a middle side magnet and a second side magnet which are sequentially arranged in the first direction, and the side magnetic circuit can form a magnetic field enhancement side facing the magnetic gap; the vibration system comprises a vibrating diaphragm and an annular voice coil used for driving the vibrating diaphragm to vibrate in the first direction, one end of the annular voice coil is connected with the vibrating diaphragm, and the other end is located in the magnetic gap. The magnetizing directions of the magnets in the center magnetic circuit and the side magnetic circuits are designed, so that magnetic lines of force can be focused at the position of the magnetic conductive plate, the intensity of a magnetic field is greatly improved, a magnetic field enhancement side facing a magnetic gap is formed, and the acoustic performance of the loudspeaker is improved.

The invention discloses a sound absorption assembly, a sound production device and electronic equipment, and relates to the acoustics field, the sound absorption assembly comprises a shell and molecular sieve powder filled in the shell, the shell is made of a flexible breathable material, the shell comprises a main body part and a sealing cover part, the main body part defines an accommodating space, the molecular sieve powder is filled in the accommodating space, and the sealing cover part covers the main body part. The sealing cover part covers the main body part to seal the accommodating space, the main body part forms a porous structure formed by stacking cellosilk, the silk diameter of the cellosilk is 0.05-10 [mu] m, the air permeability of the main body part is 100-1000 mm / s, and the average particle size of the molecular sieve powder is greater than 10 [mu] m. The invention solves the technical problem that the sound-absorbing particles are easy to crush and the crushed powder pollutes the sound-producing monomer, and the molecular sieve powder does not need to be bonded and molded by using a binder relative to the sound-absorbing particles, so that the influence on the sound-absorbing performance caused by the blocking of molecular sieve pore channels by the binder can be eliminated, and the sound-absorbing material has better acoustic improvement performance.

The invention relates to the technical field of sound effect optimization, and discloses a sound effect optimization method and device based on a coaxial loudspeaker echo wall sound box, and the method comprises the steps: carrying out the acoustic response measurement and acoustic feature analysis of the coaxial loudspeaker echo wall sound box, and obtaining a frequency domain acoustic response characteristic curve; performing acoustic partition calculation on the internal space of the coaxial loudspeaker echo wall sound box to obtain a spatial arrangement parameter of an acoustic processing unit; carrying out acoustic center positioning calculation on the coaxial loudspeaker to obtain a space coordinate parameter and an axial inclination angle parameter of the coaxial loudspeaker; carrying out sound reflection angle calculation and material combination optimization on the inner wall structure of the echo wall sound box to obtain an inner wall geometric curvature parameter and a box body material lamination parameter; sound pressure level frequency response curve analysis and sound phase positioning precision measurement are carried out on the inner wall geometric curvature parameters and the box body material lamination parameters, sound box acoustic performance verification data are obtained, the uniformity of the sound field in the sound box is guaranteed, and then the acoustic performance of the sound box is improved.

The invention relates to the technical field of sound-absorbing materials, in particular to a foaming sound-absorbing material with a high aperture ratio structure and a preparation method and application thereof.The foaming sound-absorbing material comprises one or more of polylactic acid, poly (adipic acid) / butylene terephthalate and polyhydroxyalkanoate, the density of the foaming sound-absorbing material is 0.04-0.08 g / cm < 3 >, and the porosity of the foaming sound-absorbing material is 20-30%. The aperture ratio of the foaming sound absorption material is higher than 60%. According to the invention, the polymer foaming sound absorption material with high aperture ratio can be prepared without adding other fillers and assistants, the prepared foaming sound absorption material has the characteristics of high aperture ratio, small density and the like, and the foaming sound absorption material can realize efficient absorption of sound waves in a thickness range of 10 mm.

The invention discloses a method for manufacturing an injection-molded receiver net plastic part, which comprises the following steps of: heating and melting a polymer melt through a feeding structure, injecting the polymer melt into a mold to obtain the receiver net plastic part, and quickly cooling a sound outlet hole of the receiver net plastic part by adopting preset high-temperature circulating liquid cooling in a first cooling stage through dynamic cooling treatment; the rigidity of the micropore area is effectively improved, the problem of micropore structure deformation caused by non-uniform cooling is reduced, polymer melt in the sound outlet hole area can be cured in time through rapid cooling, excessive shrinkage is avoided, and therefore the total shrinkage rate of the sound outlet hole is remarkably reduced; and in the second cooling stage, cold air is sprayed at the preset low temperature to slowly cool the outer surface of the receiver net plastic part, the toughness of the outer layer structure is enhanced, the differentiated cooling modes are accurately regulated and controlled according to different requirements of the inner and outer structures of the receiver net plastic part, uniform distribution of the shrinkage rate in the whole cooling process is achieved, and the product quality is improved. The problem that the overall shrinkage rate is too large due to a traditional cooling mode is effectively solved.

The invention belongs to the technical field of indoor acoustic effects, and discloses a sound reflecting plate structure for an indoor ceiling and a mounting method of the sound reflecting plate structure. A top plate; the first lap joint edge and the second lap joint edge form a lap joint seam, the surface modeling of the spherical panel is of a water ripple mechanism, and the spherical panel is used for reflecting transmitted sound waves and diffusing the sound waves in a divergent mode; the lapped seam is filled with the first filling material, so that the spherical plate is matched with the top plate to wrap the frame; the spherical plate, the top plate and the first filling material are all made of GRG materials. The sound reflecting plate is designed into a unique water ripple mechanism shape and a specific curved surface subjected to acoustic calculation, and the GRG material with more excellent acoustic performance is adopted, so that the sound field strength is improved, the low-frequency absorption is relatively small, the reverberation time and the sound surrounding feeling in the auditory hall are improved, and the sound quality of the auditory hall is improved. And the early-stage reflected sound and the later-stage reflected sound are balanced, so that a pure natural sound environment is realized.

The invention belongs to the technical field of electroacoustics, and particularly relates to a vibrating diaphragm of a sound production device and the sound production device. The vibrating diaphragm of the sound production device comprises at least one phenyl silicone rubber layer, the phenyl silicone rubber layer contains a network polymer, and the phenyl silicone rubber layer is formed by curing liquid phenyl silicone rubber compound. The liquid phenyl silicone rubber compound comprises methyl phenyl vinyl polysiloxane, methyl phenyl vinyl silicone resin and phenyl hydrogen-containing silicone oil. According to the vibrating diaphragm with the phenyl silicone rubber layer, the bonding force between the vibrating diaphragm and a shell and between the vibrating diaphragm and a voice coil can be remarkably improved, and meanwhile, phenyl hydrogen-containing silicone oil and methyl phenyl vinyl polysiloxane have good compatibility, so that the phenyl silicone rubber layer is better in curing uniformity, more balanced in mechanical property and not prone to failure; in addition, the vibrating diaphragm has high damping performance, THD distortion of the vibrating diaphragm can be remarkably reduced, and the vibrating diaphragm has better acoustic performance.

The invention relates to the field of aviation equipment, in particular to the technical field of sound absorption composite structures for noise control of aero-engines. The sound absorption and noise reduction composite structure of the aero-engine comprises a back plate (1); the honeycomb core (2) is different from a traditional regular hexagonal honeycomb core and is composed of semi-concave hexagonal honeycombs. The position, close to the back plate, of the honeycomb core is filled with porous sound absorption material graphene sponge, three-section equal-height filling is carried out according to density gradient change, and the filling height of each section is one fourth of the height of the honeycomb core; and the perforated plate (4) is bonded with the honeycomb core through an adhesive film. The problems that a traditional regular hexagonal honeycomb core is prone to saddle type deformation during curved surface integral forming, so that the honeycomb core deforms, and the mechanical impact resistance is poor are solved and improved, and meanwhile the sound absorption performance of the composite structure is further improved through the porous sound absorption materials filled in the honeycomb core in a gradient mode; and the sound absorption and noise reduction frequency band width of the whole composite structure is expanded.

The utility model provides a sound production device. The sound production device comprises a basin stand; the vibration system comprises a vibrating diaphragm, a first voice coil and a second voice coil, wherein the outer periphery of the vibrating diaphragm is fixed on the basin frame; the first voice coil is inserted and suspended in the first magnetic gap, and the second voice coil is inserted and suspended in the second magnetic gap; the magnetic circuit system comprises a lower clamping plate, a first central magnetic steel and a second central magnetic steel which are stacked and fixed on the lower clamping plate and are mutually spaced, a first auxiliary magnetic steel and a second auxiliary magnetic steel which are stacked and fixed on the lower clamping plate, and a special-shaped edge magnetic steel which is stacked and fixed on the lower clamping plate; the special-shaped edge magnetic steel comprises an edge magnet body, a first edge magnet and a second edge magnet, the edge magnet body is arranged between the first center magnetic steel and the second center magnetic steel, the first auxiliary magnetic steel is located on the side, away from the special-shaped edge magnetic steel, of the first center magnetic steel, and the second auxiliary magnetic steel is located on the side, away from the special-shaped edge magnetic steel, of the second center magnetic steel. Compared with the prior art, the sounding device provided by the utility model has good acoustic performance.

The invention discloses a sound production device, a sound production module and electronic equipment, and relates to the technical field of electroacoustic transduction, a magnetic circuit system of the sound production device is provided with a mounting hole penetrating through a magnetic conductive yoke and a central magnetic part, a conductive bracket is arranged in the mounting hole, and a diaphragm assembly of a vibration system comprises a vibration part, a first folding ring part and a second folding ring part, the inner side of the second folding ring part is connected with the conductive support. The two ends of the centering disk are electrically connected with a bonding pad of the conductive support and a lead of the voice coil respectively. Wherein the vibration part is provided with a convex hull part protruding in the direction away from the magnetic circuit system, and a lead of the voice coil is wired along the inner wall of the convex hull part and is electrically connected with the centering disk. According to the sound production device, the magnetic circuit system is arranged in a hollow manner and is provided with the conductive support, and the centering disk is electrically connected with the voice coil and the conductive support respectively, so that the setting volume of the edge magnetic part can be increased, the magnetic field intensity can be improved, and the BL value of a product can be increased, thereby improving the acoustic performance; in addition, the sound production device is low in magnetic flux leakage and meets the use requirements.

The invention relates to a preparation method and application of a multifunctional needled glass fiber aerogel felt. The invention discloses a multifunctional needled glass fiber aerogel felt which is prepared by the following steps: adding a catalyst, tetraethyl orthosilicate, ethanol and deionized water into a beaker in parts by weight, uniformly stirring, putting the needled glass fiber felt into a solution, aging, drying and modifying to finally obtain the needled glass fiber aerogel felt, and the catalyst is ammonia water or hydrochloric acid. The needled glass fiber aerogel felt not only can play a role in heat insulation and fire prevention, but also can absorb sound and reduce noise, and is a multifunctional high-quality material.

The invention provides a transverse excitation bulk acoustic wave resonator for improving power tolerance and application thereof, the transverse excitation bulk acoustic wave resonator comprises supporting areas, resonance areas and anchors, the supporting areas are located at the two ends of the transverse excitation bulk acoustic wave resonator, the resonance areas are located between the supporting areas at the two ends, and the anchors are located at the two ends of the transverse excitation bulk acoustic wave resonator. The resonance area is connected with the supporting areas at the two ends through anchors; a cavity is further formed between the supporting areas at the two ends, and the cavity is located below the resonance area and the anchor; the resonance area comprises a composite film and at least two interdigital metal electrodes on the surface of the composite film, the composite film comprises a first heat conduction material layer and a first piezoelectric material layer which are stacked, and the interdigital metal electrodes are arranged on the surface of the first piezoelectric material layer. The transverse excitation bulk acoustic wave resonator has the characteristic of high power resistance, and still has the excellent acoustic performance of the resonator.

The invention relates to a sealing strip and an automobile, and the sealing strip comprises a sealing part and an acoustic metamaterial structure; the sealing part forms an accommodating cavity; the acoustic metamaterial structure is arranged in the accommodating cavity; the acoustic metamaterial structure comprises a cavity structure and an acoustic metamaterial unit arranged on one side of the cavity structure; wherein the cavity structure is provided with a resonant cavity, and the resonant cavity is provided with a first opening close to the acoustic metamaterial unit; the acoustic metamaterial unit comprises a film and a mass block, the film blocks the first opening of the resonant cavity, and the mass block is arranged on the side, away from the resonant cavity, of the film. The sound insulation and noise reduction capacity of the sealing strip is high.

The utility model discloses a sounding monomer, a sounding module and an electronic product, the sounding monomer comprises a first sounding unit, a second sounding unit and a magnetic circuit system, the first sounding unit comprises an annular first vibrating diaphragm and a first voice coil connected with the first vibrating diaphragm, and the second sounding unit comprises a second vibrating diaphragm and a second voice coil connected with the second vibrating diaphragm. The second vibrating diaphragm is located at the inner periphery of the first vibrating diaphragm; the magnetic circuit system comprises a central magnetic circuit and a side magnetic circuit located at the periphery of the central magnetic circuit, a first magnetic gap is formed between the central magnetic circuit and the side magnetic circuit, and one side of the first voice coil away from the first diaphragm is inserted into the first magnetic gap; the central magnetic circuit has a second magnetic gap, the second voice coil is a flat voice coil, the axis of the second voice coil extends along a second direction perpendicular to the first direction, and one side of the second voice coil away from the second diaphragm is inserted into the second magnetic gap. The sounding single body integrates the treble and bass sounding modules, so that the mid-bass performance is not reduced, the high-frequency performance is effectively improved, and the sounding frequency band is widened.

The present application mainly relates to an earphone, wherein a movement shell is used to contact the user's skin, a transducer device enables the skin contact area of ​​the movement shell to generate bone conduction sound under the action of the transducer device, a diaphragm divides the accommodating cavity into a front cavity and a rear cavity, the movement shell is provided with a sound outlet hole connected to the rear cavity, and the diaphragm generates air conduction sound transmitted to the human ear through the sound outlet hole during the relative movement of the transducer device and the movement shell; the movement shell is provided with a pressure relief hole connected to the front cavity and a sound tuning hole connected to the rear cavity, the pressure relief hole and the sound tuning hole are arranged adjacent to each other, the leakage sound output through the pressure relief hole has a first resonance peak f1, and the leakage sound output through the sound tuning hole has a second resonance peak f2, the peak resonance frequencies of the first and second resonance peaks are respectively greater than or equal to 2kHz, and |f1‑f2| / f1≤60%, thereby making the peak resonance frequencies of the two leakage sounds as close as possible in the frequency band above 2kHz, so as to better cancel each other out and improve the sound leakage problem of the earphone.

The invention discloses a sonar array expansion mechanism, and relates to the technical field of sonar arrays, the expansion mechanism comprises a frame assembly, a transmitting array assembly and a receiving array assembly, the receiving array assembly is a circular tube transducer array, and the receiving array assembly comprises a linear driving mechanism and a plurality of receiving array components; the linear driving mechanism is arranged at the position, close to the top end, in the frame assembly, the multiple receiving array assemblies are distributed on the outer side of the frame assembly in the circumferential direction, and one end of each receiving array assembly is connected with the edge of the top of the frame assembly in a vertical rotating mode. The linear driving mechanism is fixedly connected with a connecting part, and the connecting part can be driven by the linear driving mechanism to move in the axis direction of the frame assembly; and the connecting part is connected with the plurality of receiving array assemblies. The device is simple in structure, reduces the volume ratio of the contraction and expansion mechanism, improves the space utilization rate of the sonar probe, simplifies the transmission relation of the contraction and expansion mechanism, reduces the bending of a signal cable, improves the reliability, and is higher in practicability.

The utility model discloses a half-cavity loudspeaker module, which comprises a module shell, a loudspeaker monomer, sound absorption particles, a breathable separator and a sealing spacer, and is characterized in that the module shell is provided with an opening, a mounting position and a sound outlet hole; the loudspeaker single body is installed at the installation position, the loudspeaker single body divides the internal space of the module shell into a front cavity and a rear cavity, and the front cavity is communicated with the sound outlet hole; the sound-absorbing particles are filled in the rear cavity; the breathable separator is arranged at the opening to prevent the sound-absorbing particles from escaping from the rear cavity through the opening; the sealing spacer is detachably installed on the module shell and seals the opening, and the sealing spacer is located on the side, away from the sound absorption particles, of the breathable spacer. The half-cavity loudspeaker module is filled with the sound absorption particles, the virtual rear cavity is enlarged, the acoustic performance is improved, the sealing spacer can play a role in isolating the outside atmosphere from the rear cavity, and the stability of the performance of the half-cavity loudspeaker module is guaranteed. The whole rear cavity of the half-cavity loudspeaker module is basically filled with the sound-absorbing particles, so that the acoustic performance is greatly improved.

The invention discloses a sound production device and electronic equipment, and relates to the technical field of electroacoustic energy conversion, the sound production device comprises a magnetic circuit system and a vibration system, the magnetic circuit system comprises a magnetic conductive yoke, and a center magnetic circuit and a side magnetic circuit arranged on the magnetic conductive yoke, the side magnetic circuit is located at the periphery of the center magnetic circuit, and the side magnetic circuit and the center magnetic circuit are arranged at an interval to form a magnetic gap; the side magnetic circuit comprises two side magnets and a side magnetic conductive plate surrounding the central magnetic circuit; the side magnetic conductive plate comprises two long-side magnetic conductive parts and two short-side magnetic conductive parts, the two long-side magnetic conductive parts are connected with the ends, away from the magnetic conductive yoke, of the two side magnets respectively, each short-side magnetic conductive part comprises a magnetic conductive part body and an extension part arranged on the side, facing the magnetic conductive yoke, of the magnetic conductive part body, and the extension parts extend towards the magnetic conductive yoke; the vibration system comprises a vibrating diaphragm and a voice coil which is connected with the vibrating diaphragm and drives the vibrating diaphragm to vibrate. The voice coil is arranged corresponding to the magnetic gap. By arranging the extension part, magnetic loops on the two sides of the voice coil in the long axis direction of the central magnetic circuit are increased, and the acoustic performance of the sound production device is improved.

The utility model discloses a sound guide rear seat of a condenser microphone and the condenser microphone, and particularly relates to the sound guide rear seat of the condenser microphone and the condenser microphone comprising the sound guide rear seat, the sound guide rear seat comprises a conical head, a base and two identical connecting parts, the conical head is a rotating body; the base is a hollow cylinder; the conical head and the base have the same rotating central axis; the first end of the base is connected with the conical head, and the second end of the base is connected with the two connecting parts. The condenser microphone is provided with the sound guide rear seat, so that the focusing and diffusion degree and direction of rear incoming sound can be changed, the frequency response characteristic of the condenser microphone can be improved, the directional characteristic can be optimized, the comb filtering effect and the sidelobe phenomenon can be inhibited, howling is reduced, and the condenser microphone has the advantages of simple structure, easiness in assembly, good acoustic performance and the like.

The present invention discloses a multi-drive ultra-thin speaker, comprising a housing, a diaphragm connected and fixed to the housing, and at least two independent drive units, the drive unit comprising a voice coil unit and a magnetic circuit unit arranged corresponding to the voice coil unit, the housing comprising at least two mounting holes arranged side by side, the magnetic circuit unit being arranged in the mounting holes correspondingly, the voice coil unit being further connected and fixed with a centering support plate, the end of the centering support plate away from the voice coil unit being fixed to the housing, and a sound outlet hole for sound emission being arranged on the side wall of the housing. The multi-drive ultra-thin speaker of the present invention has a simple structure, high space utilization, a large effective radiation area, and good acoustic performance.

The invention discloses a lithium tantalate wafer and a preparation method of the lithium tantalate wafer, the lithium ion concentration in the lithium tantalate wafer is 49.6%-49.75%, the preparation method comprises the following steps: uniformly putting 50-200g of lithium tantalate polycrystalline material into the bottom of a first crucible; placing two platinum wires above the lithium tantalate polycrystal material, and placing the same-component lithium tantalate wafer on the platinum wires; placing the sealed first crucible in a second crucible, wherein the bottom of the second crucible is fully paved with lithium tantalate polycrystal materials; and placing the second crucible in a heat treatment furnace, and carrying out heat treatment at 1190-1320 DEG C for 10-150 hours for diffusion to obtain the finished lithium tantalate wafer. The lithium content in the same-component lithium tantalate wafer is adjusted by adjusting the lithium ion concentration and quality in the lithium tantalate polycrystal material, so that the lithium tantalate wafer with the lithium ion concentration of 49.6%-49.75% is prepared, and the acoustic performance of the lithium tantalate wafer is improved.

This invention relates to the field of electroacoustic conversion, and more particularly to a sound-generating device, comprising a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to generate sound. The vibration system includes a diaphragm fixed to the frame and a voice coil that drives the diaphragm to vibrate. The frame includes a ring-shaped metal frame and plastic portions respectively injection-molded into the metal frame and covering a portion of the metal frame. The magnetic circuit system is fixedly connected to the metal frame by welding. The sound-generating device also includes conductive solder pads embedded in the plastic portions and exposed for introducing external electrical signals. The voice coil is electrically connected to the conductive solder pads. Compared with the prior art, the magnetic circuit system of the frame and lower clamp of this invention is increased, improving the connection and fixation effect between the frame and the magnetic circuit system. At the same time, since the flexible circuit board is housed in the clearance space and extends along the length direction of the clearance space, the conductivity reliability of the sound-generating device is effectively improved.

The invention discloses a preparation method of a wide-temperature-range high-damping metal hollow sphere / polyurethane damping composite material, and relates to a preparation method of a damping composite material. The method comprises the following steps: 1, carrying out surface modification on metal hollow spheres; and 2, preparing the polymer. Compared with pure polyurethane, the prepared wide-temperature-range high-damping metal hollow sphere / polyurethane damping composite material has the advantages that the damping performance is greatly improved, the temperature range is widened, the excellent damping performance and acoustic performance are achieved, the preparation process is simple, the stability is high, and the composite material is suitable for large-area pouring and complex-shape base materials; wide application prospects are realized in the fields of ships, aerospace, vehicles, building materials and the like; after the surface-modified metal hollow spheres are compounded with polyurethane, the damping performance can be greatly improved, the temperature range is widened, the loss factor is increased from 0.45 to 0.85, and the effective temperature range is widened from 59.9 DEG C to 100 DEG C or above.

The utility model provides a kind of sound production device, it includes basin frame, the vibration system and magnetic circuit system fixed in basin frame;Vibration system includes diaphragm fixed in basin frame, skeleton fixed in diaphragm close to magnetic circuit system side and voice coil fixed in skeleton, diaphragm includes vibration part, fold ring part extended outward by the circumference of vibration part and fixed part extended outward by fold ring part;Magnetic circuit system has magnetic gap, skeleton is fixed in vibration part and extends to magnetic gap, and voice coil is suspended in magnetic gap;The width of voice coil along the first direction perpendicular to the vibration direction of diaphragm is greater than the width of vibration part along the first direction.The utility model discloses sound production device in the case of same size, can make the size of voice coil larger, cannot appear problem of difficult to wind, to improve the acoustic performance of sound production device, in addition, in the case of the same size of voice coil, the size of sound production device can also be reduced, to reserve more space for other devices.

The invention discloses a preparation method of waste textile flame-retardant aerogel. The preparation method comprises the steps of cleaning and crushing, biological enzyme treatment, low-temperature freezing, ultraviolet irradiation, liquid nitrogen drying and the like. The preparation method comprises the following steps: cleaning, crushing, treating with biological enzyme, mixing with sodium hydroxide / urea, freezing at low temperature, unfreezing at room temperature, adding a photosensitive cross-linking agent, and performing ultraviolet irradiation; cleaning the hydrogel to neutral pH, and treating the hydrogel with liquid nitrogen for 10-20 hours to obtain an aerogel base material; after the aerogel is cut, the outer layer is dip-coated with a flame retardant solution, the inner layer is dip-coated with a composite solution of a reinforcing agent and carbon dioxide, a skin-core structure with an eccentric cross section is formed, and the aerogel with excellent flame retardance is prepared through vacuum drying and curing; a skin layer solution containing a flame retardant and a core layer solution of a composite solution are introduced in S5, a skin-core structure with eccentric cross section layout is formed in S6, and excellent flame retardant performance is shown, so that when the aerogel encounters flames, flame propagation can be delayed, and the heat release rate can be reduced.

The present application mainly relates to an earphone, wherein the movement shell is used to contact the user's skin, the transducer device enables the skin contact area of ​​the movement shell to generate bone conduction sound under the action of the transducer device, the diaphragm divides the accommodating cavity into a front cavity and a rear cavity, the movement shell is provided with a sound outlet hole connected to the rear cavity, and the diaphragm generates air-conducted sound transmitted to the human ear through the sound outlet hole during the relative movement of the transducer device and the movement shell; the movement shell is provided with a pressure relief hole connected to the front cavity and a sound tuning hole connected to the rear cavity, the pressure relief hole enables the front cavity to be connected with the external environment to reduce the blockage of the front cavity to the rear cavity, the sound tuning hole can destroy the high-pressure area of ​​the rear cavity, reduce the wavelength of the standing wave in the rear cavity, and make the peak resonance frequency of the air-conducted sound shift to high frequency; the wavelength of the standing wave in the front cavity is reduced by cooperating with multiple pressure relief holes, so that the peak resonance frequency of the leakage sound output through the pressure relief hole adjacent to the sound tuning hole is shifted to high frequency, so that the leakage sound output through the adjacent pressure relief hole and the sound tuning hole is better coherently canceled.

The present application mainly relates to an earphone, wherein the movement shell is used to contact the user's skin, the transducer device enables the skin contact area of ​​the movement shell to generate bone conduction sound under the action of the transducer device, the diaphragm divides the accommodating cavity into a front cavity and a rear cavity, the movement shell is provided with a sound outlet hole connected to the rear cavity, and the diaphragm generates air conduction sound transmitted to the human ear through the sound outlet hole during the relative movement of the transducer device and the movement shell; the movement shell includes a main shell, an auxiliary shell and an elastic connecting member, the main shell is used to form a skin contact area, the auxiliary shell is connected to the main shell through the elastic connecting member, the vibration system formed by the auxiliary shell and the elastic connecting member has a natural frequency less than or equal to 2kHz, and the earphone forms air conduction sound in a specific frequency band less than the natural frequency, and the air conduction sound output through the sound outlet hole in another frequency band greater than the natural frequency is significantly reduced, so as to use the air conduction sound to supplement the specific frequency band of the bone conduction sound, thereby improving the acoustic expression of the earphone.

The present application discloses a sound-emitting device and an electronic device having the same, wherein the sound-emitting device comprises a shell, a sound outlet is arranged on the side wall of the shell, and the shell comprises a first shell and a second shell; a sound-emitting unit, the sound-emitting unit is arranged in the shell and forms a front sound cavity between the sound-emitting unit and the first shell, and the front sound cavity is connected with the sound outlet; wherein at least one end of the first shell away from the sound outlet is provided with a sound-absorbing part, and the surface of the sound-absorbing part facing the sound outlet is provided with an aerogel material layer. According to the sound-emitting device of an embodiment of the present invention, by providing a sound-absorbing part at one end of the first shell away from the sound outlet, and providing an aerogel material layer on the surface of the sound-absorbing part facing the sound outlet, the aerogel material layer has a microporous structure, has air permeability and sound-absorbing effects, can reduce the reflection effect of the shell wall on the opposite side of the sound outlet on the sound waves of the front sound cavity, thereby reducing the resonance peaks and valleys, and improving the acoustic performance of the sound-emitting device.

The invention discloses a composite material for improving the tone quality of a loudspeaker and the loudspeaker. The composite material comprises zeolite particles, and the zeolite particles are coated with a zeolite-polymer co-spun membrane; the composite material is packaged by a flexible membrane material, on one hand, the flexible membrane material package can be conveniently assembled to the rear cavity of the loudspeaker, and the flexibility of the package can protect zeolite particles from being easily broken when the loudspeaker module is electrified to work or is impacted by falling, or even if the zeolite particles are broken, microsphere chippings and small particles are not easily leaked and enter the magnetic cavity of the loudspeaker; on the other hand, the zeolite material is combined in two forms of particles and membranes by utilizing the excellent adsorption performance and thermal stability of the zeolite, the acoustic effect of the co-spinning membrane material containing the zeolite is close to that of the zeolite particles under unit weight, and the acoustic effect of the co-spinning membrane material containing the zeolite is further improved by co-spinning with the zeolite. The membrane material has the effect of reducing the resonant frequency F0 of the system, and compared with a traditional membrane material, the acoustic effect of the membrane material is better.

The present application mainly relates to a headset, wherein the movement housing is used to contact the user's skin, the transducer device enables the skin contact area of ​​the movement housing to generate bone conduction sound under the action of the transducer device, the diaphragm divides the accommodating cavity into a front cavity and a rear cavity, the movement housing is provided with a sound outlet hole connected to the rear cavity, and the diaphragm generates air conduction sound transmitted to the human ear through the sound outlet hole during the relative movement of the transducer device and the movement housing; the diaphragm body includes an integrally connected first connection part, a folded part, and a second connection part, the first connection part is connected to the transducer device, the second connection part is arranged around the periphery of the first connection part, the second connection part is connected to the movement housing, and the folded part forms a concave area, the half-depth width W1 of the concave area, the spacing distance W2 between the first connection part and the second connection part, 0.2≤W1 / W2≤0.6. The present application forms a corresponding concave area on the diaphragm body, which can increase the deformation ability of the diaphragm along the vibration direction of the transducer device and reduce the influence of the diaphragm on the vibration of the transducer device.