31results about How to "Does not affect the fixed effect" patented technology

The invention discloses an audio processing method for a bone conduction headset, the bone conduction headset and an audio playback device based on the bone conduction headset. The bone conduction headset comprises a human bone and tissue model modeling module, a digital pre-corrector, a delay estimation unit, a digital-to-analog converter, an analog-digital converter, a first low-pass filter, a second low-pass filter, an audio amplifier, an audio driving amplifier, at least one bone conduction microphone, and at least one bone conduction vibrator. In the method, human bone and tissue attenuation effect information of different users is detected in real time; a compensating transfer function is generated based on the attenuation effect information; and an input audio signal is subjected to digital pre-correction via the compensating transfer function, and then the processed input audio signal is transmitted in human bones and tissues. Through adoption of the method, a problem that experience of the bone conduction headset is different caused by different tissue thickness of the different users is solved.

The invention discloses a cable fixing clamp, comprising an upper clamping plate, a lower clamping plate, an upper clamping block, a lower clamping block, a protection rubber ring, and a fixing bolt. The lower part of the upper clamping block and the upper part of the lower clamping block are respectively provided with transverse semi-cylindrical slots at corresponding positions and with same quantity. The upper clamping plate, the upper clamping block, the lower clamping block and the lower clamping plate are connected in sequence from top to bottom through the fixing bolt. The protection rubber ring is arranged in a round hole between the upper clamping block and the lower clamping block, the upper clamping plate and the lower clamping plate are stainless steel plates, and the upper clamping block and the lower clamping block are DMC plastic blocks. The protection rubber ring consists of a plurality of layers of rubber rings. The upper clamping block and the lower clamping block are made of the DMC material with convenient processing, and the two clamping blocks can be prolonged according to the number of the cables needing to be fixed, thereby achieving the fixing of a plurality of cables. The fixing clamp of the invention can adapt to different cables through increasing or reducing the number of the protection rubber rings, thereby enhancing the installation efficiency.

The invention discloses a telegraph pole support. The telegraph pole support comprises a fixing box, wherein a spiral elevator is arranged on the fixing box and comprises a screw rod perpendicular tothe ground; the lower end of the screw rod is positioned in the fixing box; the bottom end face of the screw rod is rotationally connected with a connecting rod; a first gear is arranged at the upperportion of the connecting rod; a spiral blade is arranged at the middle portion of the connecting rod; the bottom end of the connecting rod is conical; an installing plate is arranged on the screw rod; a motor is arranged on the installing plate; a second gear engaged with the first gear is arranged on an output shaft of the motor; a first through hole allowing the spiral blade to penetrate is formed in a bottom plate of the fixing box; a first folding rod is arranged on the side face of the fixing box; an arc groove is formed in one end portion of the folding rod; and a telegraph pole is in tight contact with the inner concave face of the arc groove. The spiral blade is screwed into the ground to provide a fixing point for the folding rod, supporting is firm, use is convenient, and practicability is high.

The invention provides a cable fixing device which comprises a groove body, shackles and supporting cards. The shackles and the supporting cards are arranged on the inner sides of the groove body, arranged on the same axis and the same in height. The height of the shackles and the supporting cards is lower than that of the side walls of the groove body. The shackles are two in number. The supporting cards are two in number. The two shackles are arranged at the two ends of the groove body respectively and arranged between the two supporting cards. The invention further provides a cable fixing system. By means of the cable fixing device and system, effective fixing of cables of fiber optic sensors of underwater rod pieces of an ocean guide pipe frame platform can be achieved, and severe shaking, pulling and pressing of the cables are avoided.

The invention provides a leg fracture care support, which includes a thigh holding part, a calf holding part, a connecting shaft, a massage ball, a fixing belt, a plug, a socket, a motor, a power cord, a controller, a bracket, a motor base, and a telescopic shaft. The thigh holding part and the calf holding part are movably connected through the connecting shaft, one side of the thigh holding part and the calf holding part is fixedly provided with the fixing belt, and the end of the fixing belt is fixedly provided with There is the plug, the other side of the leg holding part and the shank holding part are fixed with the socket, the socket matches the plug, and the thigh holding part and the shank holding part A plurality of massage balls are arranged in the grooves on the upper surface. The beneficial effect of the invention is that the patient can self-regulate and promote the blood circulation of the fractured leg.

The invention relates to a gear with a hobbed hard tooth surface. The gear is characterized in that a transverse baffle sheet is arranged between a gear rod and a gear body; the rim of the baffle sheet is in a circular arc shape; a small key groove is formed in the left side of the gear rod; a big key groove is formed in the right side of the gear rod; and the small key groove is located on the surface corresponding to the big key groove. Compared with the prior art, the technical scheme of the gear with the hobbed hard tooth surface has the advantages that the fixing effect is not affected, meanwhile lubricant is saved, and the gear has a positioning function.

The invention relates to a permeable medical plaster cast and hole puncher. The permeable medical plaster comprises a plaster cast which has a plurality of breather holes. The specialized hole puncher is composed of a hole-punching peg and a hole-punching prick; wherein, the prick peg comprises a base and a pillar canal; the hole-punching prick is composed of a prick rod and a prick head. The prick head has blade mouth. The invention resolves the difficulty of imporosity of the existing medical gesso; the gesso hole-puncher can punching a plurality of hole freely on the premises of not impacting the fixing intensity, tenacity and fixing effect of the gesso without breaking off the gesso powder. The invention has the advantages of rational design, convenient operation, safety and reliability, scientific ness, beauty and durability.

The invention provides a tooling for pipeline flying marking, and relates to the technical field of laser marking. The tooling comprises a mounting bottom plate, a two-way mobile platform arranged onthe mounting bottom plate, a first positioning part and a second positioning part, wherein the first positioning part and the second positioning part are mounted on the two-way mobile platform, and the two-way mobile platform is used for driving the first positioning part and the second positioning part to move in the direction parallel to the surface of the mounting bottom plate and / or vertical to the surface of the mounting bottom plate; the first positioning part is used for primarily positioning flowing products, the second positioning part is used for secondarily positioning the flowing products, the product positioning center of the first positioning part and the product positioning center of the second positioning part are located in the same horizontal height, and the connecting line of the product positioning centers is parallel to the transmission direction of an assembly line. By means of clamp positioning for the products in the assembly line in two different directions, the products on the assembly line are effectively prevented from shaking or jumping during marking, and marking quality and marking effect stability are effectively improved.

The invention discloses a nodular cast iron pipeline support device for a tunnel. The device comprises a fixed base, a supporting seat, at least two arc-shaped pipe clamps and at least two fixed plates. The arc-shaped pipe clamps are arranged in a matched mode, and the edges of the arc-shaped pipe clamps are connected through a first bolt piece. The bottom of one arc-shaped pipe clamp is welded tothe upper surface of the supporting seat. The fixed plates are matched with each other and are fixed to the upper surface of the fixed base. A first strip-shaped fixing hole is formed in each fixed plate. Second strip-shaped fixing holes matched with the first strip-shaped fixing holes are formed in the fixed base in a penetrating mode. The bottom of the supporting seat is in a T shape and is fixed to the fixed base through second bolt pieces. The bottom of the fixed base is provided with arc-shaped elastic cushions. According to the device, the problems that in the prior art, angle iron welding parts are adopted to support a pipeline, the overall stability is poor, and safe operation of the pipeline is affected during long-term use; the position of the pipeline after being fixed is inconvenient to adjust; and the fixed base cannot make effective contact with the tunnel, and therefore the stability further gets worse are solved.

The invention relates to the technical field of concrete pipe pile production, in particular to a multi-stage steel composite concrete pipe pile and its production device, a mixing and weighing mechanism, a feeding mechanism, a forming mold and a centrifugal support mechanism. The stirring and weighing mechanism designed in the present invention can monitor the weight of each component raw material added in real time. When the feeding mechanism is feeding, the weight of the feeding material is monitored to prevent insufficient or excessive feeding. The forming mold of the present invention realizes the fixing of the upper mold and the lower mold through the first fixing block, which is easy to disassemble and improves work efficiency. At the same time, the L-shaped groove, the first wedge-shaped block and the second wedge-shaped block can ensure reliable fixing and reduce molding Influence on the fixing effect when unexpected vibration and collision occur during mold transportation. The centrifugal support mechanism designed by the present invention can adjust the height by increasing or decreasing the number of height adjustment blocks on the premise of ensuring stable and reliable support, and can adjust the gap of the support seat according to the size of the actual concrete pile.

The invention discloses circumcision anastomat. The circumcision anastomat comprises anastomosis parts including the upper anastomosis part and the lower anastomosis part. The upper anastomosis part and the lower anastomosis part are semicircular anastomosis parts which are matched with each other. The first end faces of the upper anastomosis part and the lower anastomosis part are connected with each other, wherein a rotating shaft is adopted for the joint. At least two fixed supports extending inwards are arranged on the lateral sides of the inner side faces of the anastomosis parts. A fixing ring with the diameter smaller than the inner diameter of a ring formed by the anastomosis parts is arranged on the inward end faces of the fixed supports. Multiple layers of cleaning cotton cloth which are stacked from outside to inside are arranged in a cavity formed by the fixed supports, the fixing ring, the upper anastomosis part and the lower anastomosis part. A draw thread extending out of the fixing ring is arranged at one corner of each piece of cleaning cotton cloth. Because the circumcision cycle is long, by means of the design, skin can be cleaned by drawing the cleaning cotton cloth in the process.

The invention discloses a utility pole support, which comprises a fixing box, on which a screw jack is arranged, and the screw jack includes a screw perpendicular to the ground, the lower end of the screw is located in the fixing box, and the bottom end surface of the screw is Rotate and connect the connecting rod, the upper part of the connecting rod is provided with a gear one, the middle part of the connecting rod is provided with a spiral blade, the bottom end of the connecting rod is conical, the screw rod is provided with a mounting plate, and the motor is provided on the mounting plate. The output shaft of the motor is provided with a gear 2 that engages with the gear 1, a through hole 1 is provided on the bottom plate of the fixed box for the helical blade to pass through, a folding rod 1 is provided on the side of the fixed box, and an arc is provided at the end of the folding rod. The utility pole is in close contact with the inner concave surface of the arc-shaped groove, and the spiral blade of the present invention is screwed into the ground to provide a fixed point for the folding pole, with firm support, convenient use and strong practicability.

The invention discloses a positioning device for the interior of an automobile, and relates to the technical field of automobile accessories. The positioning device for the interior of the automobile comprises a device body, and a positioning groove is formed between the left side and the right side of the device body in a penetrating mode. According to the positioning device for the interior of the automobile, when an ambulance accelerates or decelerates, an inertia driving mechanism can control the positioning mechanism to locate wheels of a wheel stretcher or a wheel chair in the positioning groove under the inertia effect, so that the wheel stretcher or the wheel chair can be greatly prevented from moving, and when the ambulance stops, the inertia driving mechanism can control the positioning mechanism to be separated from the rollers of the wheel stretcher or the wheel chair, so that the wheel stretcher or the wheel chair can be directly pushed out, a locking device of the rollers of the wheel stretcher or the wheel chair does not need to be opened, more time can be gained for rescue of patients, and due to the fact that the device is fixed inside an ambulance, even if blood or water spots exist in the ambulance, the fixing effect of the stretcher or the wheelchair cannot be affected.

The invention discloses a metal baffle plate for a touring car. The metal baffle plate comprises a metal baffle plate body, a wrapping strip and a plurality of hangers, wherein the wrapping strip is connected with the metal baffle plate body, and wraps the two wide portions and a long portion of the metal baffle plate body; the hangers are connected with the metal baffle plate body, and are arranged above the metal baffle plate body; a metal door plate is compounded by 55%-70% of aluminum alloy and 30%-45% of rare metal. In this way, the metal baffle plate can improve application performances of the baffle plate body, is light in weight, is high in strength and is relatively long in service life.

The invention discloses bridge pier strength monitoring equipment based on bridge safety detection. The bridge pier strength monitoring equipment comprises a mounting hole and a positioning hole which are formed in a bridge pier; an embedded part is fixedly arranged in the mounting hole, a monitoring part is arranged in the embedded part; the monitoring part comprises an outer cylinder, an inner cylinder, a guide assembly arranged on the outer side of the outer cylinder, a first partition plate fixedly arranged on the outer cylinder, a storage battery and a strength analyzer arranged on the first partition plate, a pressurizing assembly arranged on the left side of the first partition plate, and a plurality of pressing sheets arranged on the inner cylinder; the arranged embedded part is permanently fixed in the mounting hole, the outer cylinder is mounted on the embedded part through the guide assembly, operation is convenient, and the mounting efficiency is improved; a pressurizing assembly is arranged, the pressure is continuously applied to the pressing piece so that the pressing piece can be attached to the wall of the mounting hole, the strength of the bridge pier is detected through a strength analyzer, the pressurizing assembly achieves pressure on the pressing piece through the structure of the pressurizing assembly, the storage battery only supplies power to the strength analyzer, energy consumption is reduced, and the endurance time of equipment is prolonged.

The invention discloses an automatic anti-theft device and method for a sensor door. The automatic anti-theft device comprises a base; a vertical box is fixedly connected to the right side of the topof the base; a top box is fixedly connected to the top of the vertical box; cameras are arranged on the front side of the top box; a control panel, a display screen and an alarm are arranged on the front side of the vertical box; a control cabinet is fixedly connected to the bottom of the inner wall of the vertical box; and a graph collector, a D / A converter, a processor, a data comparison device,a memorizer and a storage battery are arranged in the control cabinet. The automatic anti-theft device and method relate to the technical field of automatic anti-theft devices for sensor doors. The automatic anti-theft device for the sensor door has the advantages that elements are used in a cooperative mode, entering personnel can be effectively checked, when a suspicious situation is found, thedoor can be tightly clamped in time and can be prevented from being continuously opened, warning and reminding are carried out, and therefore the safety can be greatly improved, unnecessary waste canbe reduced, and normal use by users can be guaranteed.

The invention discloses core filling type compensation backing plates capable of adjusting misalignment of alignment reserved holes. The core filling type compensation backing plates comprise fixing plates and core filling pipes, wherein the diameters of the fixing plates are greater than the hole diameters of the reserved holes; the outer diameters of the core filling pipes are consistent with the hole diameters of the reserved holes; each of the core filling pipes is fixed at the center of one surface of the corresponding fixing plate; the core filling pipes are of hollow tubular structures;and circular or oval through holes are formed in the areas, corresponding to the inner cavities of the core filling pipes, of the fixing plates. According to the core filling type compensation backing plates capable of adjusting the misalignment of the alignment reserved holes, the reserved holes of which the hole diameters are slightly greater than a set hole diameter are reserved in to-be-perforated positions of a structure; the compensation backing plates are inserted into the reserved holes; and the through holes capable of adjusting the direction and position are formed in the compensation backing plates, so that the alignment of the reserved holes at two sides can be ensured. In addition, the compensation backing plates are of truncated cone structures with stepped surfaces so as toachieve stable force bearing of an entire alignment system and avoid the influence on the fixing effect of the alignment system while ensuring that the diameters of the open holes are greater than the set hole diameter.

The invention discloses an injection auxiliary fixing device for animal husbandry, and relates to the technical field of animal husbandry. The injection auxiliary fixing device for animal husbandry includes a spindle assembly, the two sides of the spindle assembly are movably connected to a first fixing assembly and a second fixing assembly correspondingly, an adjusting assembly and a moving assembly are arranged at the interior and bottom of each of the first fixing assembly and the second fixing assembly respectively, a boxing out assembly is further arranged in each of the first fixing assembly and the second fixing assembly, and a cleaning assembly is arranged on one side of each of the first fixing assembly and the second fixing assembly respectively; and a massage assembly is furtherarranged on each of the first fixing assembly and the second fixing assembly. By arranging the first fixing assembly and the second fixing assembly, two animals can be injected at the same time, andwhen the two animals come to the first fixing assembly and the second fixing assembly, the whole body can be limited at the current position through the dead weight of the two animals, so that no extra fixing device is needed for the whole body, and very good practicability is achieved.

The invention relates to the technical field of concrete pipe pile production, in particular to a multi-grading steel composite concrete pipe pile and a production device thereof. The multi-grading steel composite concrete pipe pile comprises a stirring and weighing mechanism, a feeding mechanism, a forming mold and centrifugal supporting mechanisms. The stirring and weighing mechanism designed by the invention can monitor the weight of added component raw materials in real time. When the feeding mechanism carries out feeding, the feeding weight is monitored, and the situation of insufficient feeding or excessive feeding is prevented. According to the forming mold of the invention, an upper mold body and a lower mold body are fixed through first fixing blocks, disassembly is convenient, the working efficiency is improved, meanwhile, reliable fixing can be guaranteed through L-shaped grooves, first wedge-shaped blocks and second wedge-shaped blocks, and the influence on the fixing effect when accidental vibration and collision happen in the forming mold transportation process is reduced. According to the centrifugal supporting mechanisms, on the premise that supporting is stable and reliable, the height can be adjusted by increasing or decreasing the number of height adjusting blocks, and the gap between supporting seats can be adjusted according to the actual size of a concrete pile.

The invention belongs to the technical field of network filter winding equipment, and discloses a pre-cutting process of a network filter, which is used for cutting an enameled wire before the enameled wire of the network filter is wound, cutting the enameled wire led out of the network filter through a cutting module, determining a cutting area of the enameled wire, and cutting the enameled wire through a cutting module. At least one notch with the cutting depth not smaller than 45% of the diameter of the enameled wire is formed in the cutting area. According to the invention, the notch meeting the requirement is formed firstly, so that the coil which is wound outside to form the enameled wire can be automatically cut off from the notch after falling into the corresponding pin in the subsequent winding treatment process, and the effect of automatically removing the wire end is achieved.

The invention belongs to the technical field of line installation, and discloses an assembly type indoor cable and wire installation structure, which comprises a bottom plate, wherein a bottom box isfixedly installed at the top of the bottom plate, a movable plate is movably connected to the top of the bottom box, a fixed block is movably connected to the top of the movable plate, a movable blockis hinged to the left side of the top of the fixed block, the bottom of the movable block is movably connected with the top of the fixed block, and a lead screw is movably mounted in the bottom box.By arranging the lead screw, the moving blocks and the inclined rods, when the lead screw rotates, the two moving blocks can move oppositely, at the moment, due to the pushing effect of the two inclined rods, the movable plate, the fixed block and the movable block can integrally move upwards, and then the position height of a first clamping arc and the position height of a second clamping arc arechanged, so that workers can conveniently fix and mount cables at different position heights, and the operation is simple and convenient so as to improve the practicability of the cable and wire mounting structure.

The invention discloses a corrugated carton board tilter. The corrugated carton board tilter structurally comprises a base, a control box, an overturning block, a rolling shaft and an operating platform, wherein the top of the base is welded to the bottom of the control box; the bottom of the overturning block is movably clamped to the top of the base through a rolling shaft; the bottom of the operating platform is fixedly embedded into the top of the overturning block; and the operating platform comprises a shell, a pressure device, an air chamber, an air exhaust port and a fixed buffer block, wherein the inner wall of the shell is welded to the bottom end of the pressure device. According to the corrugated carton board tilter, kraft paper can be fixed on the operating platform in the bonding process of the kraft paper and a paper core interlayer, so that the relative displacement is avoided in the bonding process, and the situation that the elasticity and the extensibility are influenced by the air chamber generated after the bonding process is avoided; and meanwhile, a buffer seat can be used for buffering so as to avoid irregular collapse if the lower pressure is not uniform inthe bonding process, and the fixing effect cannot be influenced in the buffering process.

Provided by the present invention is a 3D printer for the external fixation of a fracture, comprising a printer frame, wherein a feeding device is installed at an upper portion of the printer frame, a three-axis moving mechanism is installed at a middle portion of the printer frame, an air cooler is installed at a lower portion of the printer frame, and a first hot air softening device and second hot air softening device are installed at two sides of the three-axis moving mechanism respectively; a dedicated print head is installed on a three-axis moving platform of the three-axis moving mechanism, and a discharge port of the feeding device is connected to an end of a feeding hose, while a feeding port of the dedicated print head is connected to the other end of the feeding hose; an air outlet of the air cooler is connected to an end of a cold air hose, and an air inlet of the dedicated print head is connected to the other end of the cold air hose; a surface of a model is softened to achieve the purpose of flattening the surface without deforming the entire model to affect a fixation effect, thus the purpose of rapid printing of an external fixation model for a fracture is achieved.

The invention discloses circumcision anastomat. The circumcision anastomat comprises anastomosis parts including the upper anastomosis part and the lower anastomosis part. The upper anastomosis part and the lower anastomosis part are semicircular anastomosis parts which are matched with each other. The first end faces of the upper anastomosis part and the lower anastomosis part are connected with each other, wherein a rotating shaft is adopted for the joint. At least two fixed supports extending inwards are arranged on the lateral sides of the inner side faces of the anastomosis parts. A fixing ring with the diameter smaller than the inner diameter of a ring formed by the anastomosis parts is arranged on the inward end faces of the fixed supports. Multiple layers of cleaning cotton cloth which are stacked from outside to inside are arranged in a cavity formed by the fixed supports, the fixing ring, the upper anastomosis part and the lower anastomosis part. A draw thread extending out of the fixing ring is arranged at one corner of each piece of cleaning cotton cloth. Because the circumcision cycle is long, by means of the design, skin can be cleaned by drawing the cleaning cotton cloth in the process.

The invention discloses a corrugated pipe and an assembling method. The corrugated pipe comprises a pipe body, an adapting pipe and an inserting pipe; the adapting pipe is arranged on one side of thepipe body; the inserting pipe is arranged on the other side of the pipe body; the pipe body comprises an inner pipe, an iron wire pipe and an outer pipe; the iron wire pipe sleeves the inner pipe; theouter pipe sleeves the iron wire pipe; outer pipe bulges are arranged on the outer side of the outer pipe; iron wire pipe bulges are arranged on the outer side of the iron wire pipe; supporting ribsare arranged between the iron wire pipe bulges and the outer pipe bulges; and the part between the inner pipe and the iron wire pipe is filled with a heat insulating material. The supporting ribs arearranged between the outer pipe bulges and the iron wire pipe bulges, so that the bearing pressure outside the pipe body is improved; the iron wire pipe bulges correspond with the outer pipe bulges toform vacuum cavities, so that the inner wall of the pipe body is tighter, the buffering effect is improved, and the possibility of damage and deformation is low; and the toughness of the inner pipe is improved due to the compressed effect of the iron wire pipe, and the possibility of rupture is low.

The invention discloses core filling type compensation backing plates capable of adjusting misalignment of alignment reserved holes. The core filling type compensation backing plates comprise fixing plates and core filling pipes, wherein the diameters of the fixing plates are greater than the hole diameters of the reserved holes; the outer diameters of the core filling pipes are consistent with the hole diameters of the reserved holes; each of the core filling pipes is fixed at the center of one surface of the corresponding fixing plate; the core filling pipes are of hollow tubular structures;and circular or oval through holes are formed in the areas, corresponding to the inner cavities of the core filling pipes, of the fixing plates. According to the core filling type compensation backing plates capable of adjusting the misalignment of the alignment reserved holes, the reserved holes of which the hole diameters are slightly greater than a set hole diameter are reserved in to-be-perforated positions of a structure; the compensation backing plates are inserted into the reserved holes; and the through holes capable of adjusting the direction and position are formed in the compensation backing plates, so that the alignment of the reserved holes at two sides can be ensured. In addition, the compensation backing plates are of truncated cone structures with stepped surfaces so as toachieve stable force bearing of an entire alignment system and avoid the influence on the fixing effect of the alignment system while ensuring that the diameters of the open holes are greater than the set hole diameter.

The invention belongs to the technical field of network filter winding equipment, and discloses a pin winding pre-cutting system of a network filter and a pin winding system thereof, which are used in a pin winding process of the network filter, the pin winding pre-cutting system comprises a cutting module and a fixed end face, the network filter is fixed on the fixed end face, and an enameled wire is led out for fixation; the cutting module is manually or automatically controlled to move relative to the fixed end face, and the fixed varnished wire is cut by the cutting module to form a notch not larger than 45% of the diameter of the varnished wire. According to the invention, manual or automatic wire winding and cutting processing of multiple groups of network filters can be realized through the cutting module and the fixed end face, and a notch meeting requirements is formed firstly, so that a coil which is wound outside to form an enameled wire can be automatically cut off from the notch after falling into a corresponding pin in a subsequent wire winding processing process, and the production efficiency is improved. Therefore, the effect of automatically removing the thread residues is achieved.

The invention discloses an audio processing method used in a bone conduction earphone, a bone conduction earphone and an audio playback device based on the bone conduction earphone. The bone conduction earphone includes a human bone and tissue model modeling module and a digital Precorrector, delay estimation unit, digital-to-analog converter, analog-to-digital converter, first low-pass filter, second low-pass filter, audio amplifier, audio driver amplifier, at least one bone conduction microphone, at least one bone conduction Oscillator; real-time detection of the attenuation effect information of human bones and tissues of different users, based on the attenuation effect information, a compensation transfer function is generated, and the digital pre-correction of the input audio signal is performed in the bones and human tissues through the compensation transfer function conduction. Solve the problem that different users have different thicknesses of human tissue, resulting in different experience of bone conduction earphones.

The invention relates to a permeable medical plaster cast and hole puncher. The permeable medical plaster comprises a plaster cast which has a plurality of breather holes. The specialized hole puncheris composed of a hole-punching peg and a hole-punching prick; wherein, the prick peg comprises a base and a pillar canal; the hole-punching prick is composed of a prick rod and a prick head. The prick head has blade mouth. The invention resolves the difficulty of imporosity of the existing medical gesso; the gesso hole-puncher can punching a plurality of hole freely on the premises of not impacting the fixing intensity, tenacity and fixing effect of the gesso without breaking off the gesso powder. The invention has the advantages of rational design, convenient operation, safety and reliability, scientific ness, beauty and durability.