12results about How to "Improve acoustic performance" patented technology

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 application provides a mask base cloth and a preparation method and application thereof, and the preparation method comprises the following steps: a first mixed fiber comprises a combination of fine denier viscose fibers and modal fibers, which is subjected to opening, double-carding and laying, to obtain a skin-felt fiber web layer; a second mixed fiber comprises a combination of vinylon fibers and seaweed fibers, which is subjected to opening, double-carding and laying, to obtain a micro-elastic web layer; the skin-felt fiber web layer and the micro-elastic web layer are stacked and then subjected to water jet entanglement, and the obtained semi-finished product is dried to obtain the mask base cloth. Through the design of fiber types and the compounding of the fiber types with a double carding machine, a specific double-layer structure is obtained, and the water jet process is combined, so that the mask base cloth has a specific microporous structure, cavitation effect and energy loss are avoided, the mask base cloth has excellent skin feeling, high air permeability, excellent liquid absorption and retention capacity, mechanical properties and acoustic properties, can be highly matched with ultrasonic beauty equipment, and can play a lifting and tightening effect.

The application discloses a sound production device and electronic equipment, and relates to the technical field of electroacoustic energy conversion, wherein the sound production device comprises a magnetic circuit system, a shell, a mesh cloth and a vibration system; the magnetic circuit system comprises a magnetic yoke, a center magnetic circuit arranged on the magnetic yoke and a side magnetic circuit; the side magnetic circuit comprises two side magnets; the magnetic yoke comprises a bottom plate and two side plates connected with the bottom plate; the side magnetic circuit and the side plates are arranged around the periphery of the center magnetic circuit and are spaced apart from the center magnetic circuit to form a magnetic gap; the shell is provided with a communication hole; the mesh cloth covers the communication hole; the mesh cloth and the side plates are spaced apart to form an air flow channel; the air flow channel is connected with an external environment and a cavity on the inner side of the side plate through the mesh cloth; and the vibration system comprises a diaphragm and a voice coil, and the voice coil is arranged corresponding to the magnetic gap. The mesh cloth and the shell are integrally injection molded to realize complete filling; on this basis, the two side plates and the center magnetic circuit form a magnetic loop, the magnetic induction intensity of the magnetic gap is improved, and the acoustic performance of the sound production device is improved.

The utility model discloses a sound unit, including two magnetic cover and two edge magnetic structure, two the magnetic cover is opposite to set up, and at least one the middle part of magnetic cover has the inner flanging, and the inner flanging is located between two the magnetic cover, the edge magnetic structure includes by lower to upper in proper order the lower edge magnetic steel, the edge huasi and upper edge magnetic steel, the lower edge magnetic steel and upper edge magnetic steel are connected different the magnetic cover respectively, the inner flanging is located between two the edge magnetic structure, and the distal end of inner flanging with the edge huasi corresponds. This sound unit has the superiority of high, and has reduced center huasi and at least one center magnetic steel, has realized the reduction of sound unit parts, has facilitated the assembly work of sound unit, is favorable to the promotion of the assembly efficiency of sound unit, reduces the assembly cost of sound unit, and alleviates the total weight of sound unit.

This utility model discloses a sound absorption and noise reduction structure for a vacuum cleaner, including an airflow channel pipe. One end of the airflow channel pipe is snapped into a vacuum cleaner connector. Dust chamber shell one and dust chamber shell two are respectively attached to both sides of the airflow channel pipe. The mating surfaces of dust chamber shell one and dust chamber shell two are snapped into each other, and a handle ring is snapped into the outer side of the dust chamber shell one near the vacuum cleaner connector end, and a limit ring is snapped into the outer side of the dust chamber shell one away from the handle ring end. A dust chamber shell cover is snapped into the top of dust chamber shell one and dust chamber shell two. Heat dissipation holes are opened on the bottom side of each dust chamber shell one and dust chamber shell two, and a motor assembly is fixedly connected inside the corresponding heat dissipation holes. Through the integrated design of airflow channel optimization, vibration isolation, composite noise reduction and efficient heat dissipation, the acoustic performance of the vacuum cleaner is improved while ensuring heat dissipation efficiency and structural reliability, achieving a comprehensive technical effect of low noise and high stability.

The application discloses a manufacturing method of an ultrasonic catheter, the ultrasonic catheter and a forming die thereof. The manufacturing method of the ultrasonic catheter comprises the following steps: preparing an array stack; selecting a lead-out wire; coating a polymer material at a preset distance from one end of the lead-out wire to form a preformed tube; electrically connecting one end of the lead-out wire close to the preformed tube to the array stack; adopting split pouring to manufacture a sound-transparent protective layer coated on the periphery of the array stack and one end of the preformed tube close to the array stack; electrically connecting the other end of the lead-out wire away from the preformed tube to a circuit connector; and forming a Parylene coating layer on the outer surface of the sound-transparent protective layer. The Parylene coating layer enables the sound-transparent protective layer to better adapt to the vascular environment of the human body and meet the requirements for use in blood vessels. Therefore, the selection range of the manufacturing material of the sound-transparent protective layer is wider, and a material with a lower pouring temperature can be selected to manufacture the sound-transparent protective layer, so that the array stack is prevented from being separated due to heat, and the acoustic performance, consistency and qualification rate of the ultrasonic catheter are improved.

The utility model belongs to the technical field of sound energy conversion discloses a kind of sounding device and electronic equipment, sounding device includes shell, magnetic circuit system and vibration system, magnetic circuit system is connected in shell, and magnetic circuit system is equipped with magnetic gap;Vibration system includes diaphragm and the voice coil for driving diaphragm vibration, and diaphragm includes ring folding part, the sealing structure connected in shell and the vibration plate connected in ring folding part;Sealing structure is arranged around ring folding part;Sealing structure includes the abutting portion and the first connecting portion of connection, the included angle between the inside surface of abutting portion and the virtual line extending along second direction is first included angle, the included angle between the outside surface of abutting portion and the virtual line extending along second direction is second included angle, and first included angle is less than second included angle;First connecting portion is connected in ring folding part, and second direction is perpendicular to the axial direction of sealing structure.The utility model has preferable acoustics performance.

The application discloses a kind of low-frequency broadband sound-absorbing metamaterial structures and super-constructed sound barriers based on metal foam, and the metamaterial structure includes metal foam layer and composite resonant cavity layer, and the metal foam layer and the composite resonant cavity layer are stacked;Composite resonant cavity layer includes mother cavity structure and sub-cavity structure, and the sub-cavity structure is embedded in the mother cavity structure, and the mother cavity structure and the sub-cavity structure are all provided with openings towards the metal foam layer, so that the incident sound wave can enter the mother cavity structure and the sub-cavity structure after propagating through the metal foam layer;The cavity of mother cavity structure and sub-cavity structure is unidirectional equal-section cavity.The application is applied to the field of acoustic noise reduction, realizes the high-efficiency sound-absorbing performance of low frequency and wide band, has high stiffness and strength and excellent environmental adaptability, can bear, has good environmental tolerance, has excellent fireproof performance, is suitable for various complex and severe environments, ensures long-term stable working state, is convenient for low-cost mass production, and improves economic feasibility.

This utility model discloses a green and eco-friendly composite wood flooring, comprising a core layer, a surface layer above the core layer, a bottom layer below the core layer, an environmentally friendly reinforced composite layer between the core layer and the bottom layer and laminated together using an environmentally friendly adhesive, and a composite self-locking noise-reducing connection structure located at the edge of the core layer. The composite self-locking noise-reducing connection structure includes an elastic barbed tongue and groove, a corresponding groove, and an embedded flexible shock-absorbing and noise-reducing strip within the main locking groove. This utility model, through the introduction of the environmentally friendly reinforced composite layer and innovative connection structure design, solves the problems of loose joints, noise transmission, insufficient environmental performance, and poor flatness retention after installation in existing composite flooring, providing a high-performance and environmentally friendly floor decoration material.

The application discloses a bone conduction earphone, which comprises two earphone heads (1), two warehouse bodies (2), ear hanging lines (3) connected between the earphone heads (1) and the warehouse bodies (2), and neck wearing lines (4) connected between the two warehouse bodies (2). When the neck wearing line (4) is in a horizontal state, the warehouse body (2) extends vertically downward or extends downward and inclines toward the side where the earphone head (1) is located. In the application, the center of gravity of the warehouse body is closer to the fulcrum where the ear hanging line contacts the ear, the center of gravity of the whole bone conduction earphone is closer to the front, the tendency of the bone conduction earphone to swing around the fulcrum during movement is inhibited, the swing amplitude is reduced, the bone conduction earphone is more stable and reliable when worn on the head, and the use experience is better.

This invention provides a self-adhesive flexible ultrasonic patch, solving the problems of unstable probe fixation and poor adhesion in existing pipeline inspection methods. The patch includes a flexible ultrasonic transducer assembly, which is composed of an 8*16 unit array and a multi-layer composite structure consisting of a matching layer, a piezoelectric layer, a backing layer, and an encapsulation layer. The matching layer is a composite material of PDMS-doped graphene and tungsten powder; the piezoelectric layer is a PZT-5H piezoelectric column array; the backing layer is a magnetic sound-absorbing composite material of PDMS-doped tungsten powder, porous graphene, and neodymium iron boron nanoparticles; and the encapsulation layer is a pure PDMS integrated encapsulation. This invention integrates magnetic adsorption functionality into the backing layer, enabling rapid, non-destructive installation and stable contact between the patch and the pipeline. Utilizing a flexible multi-layer structure to adapt to pipeline curvature, it combines excellent surface adaptability with ultrasonic testing performance, making it suitable for wall thickness detection and long-term monitoring of metal pipelines. It is easy to install and highly stable.

This invention discloses a sound-generating device and an electronic device, relating to the field of electroacoustic transduction technology. The sound-generating device comprises a first vibration component and a second vibration component that are opposite to each other along a first direction and spaced apart to form a front acoustic cavity. The outer casing has a sound outlet hole communicating with the front acoustic cavity. A first magnetic circuit component and a second magnetic circuit component of the magnetic circuit system are located on opposite sides of the vibration system along the first direction. The first magnetic circuit component includes three first magnets, and the second magnetic circuit component includes three second magnets. All three first magnets and three second magnets are magnetized along the first direction. Adjacent first magnets are magnetized in opposite directions, as are adjacent second magnets. The magnetization directions of the first magnets and second magnets opposite to each other along the first direction are also opposite. This invention not only achieves bi-directional radiation, improving the sound-generating performance and increasing the overall loudness of the device, but also enables a thin and light design, meeting the thin and light design requirements of terminal products.