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37results about How to "Does not affect sound quality" patented technology
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Method for realizing screen projection from single PC screen to multiple different device screens
InactiveCN106406789ASharing Convenience and HumanizationIncrease the sense of spaceDigital output to display deviceTerminal equipmentData acquisition
The invention provides a method for realizing screen projection from a single PC screen to multiple different device screens. The method comprises the following steps of (1) deploying screen projection software on a source terminal device to realize screen audio-video data acquisition and reception of a terminal, and sending audio-video data by using an RTSP protocol through H264 standard coding compression; (2) establishing local area network communication between the source terminal device and a display terminal device; (3) providing a display operation interface by the screen projection software, and displaying a searched display terminal device list in a local area network, wherein a user can check a plurality of display terminal devices for output and display; and (4) deploying display software on the display terminal devices to realize search response to the source terminal device, and decoding, displaying and outputting the received audio-video data subjected to the H264 standard coding compression. According to the method, the purpose of projecting screen audios and videos of a terminal to a plurality of terminals for display without a forwarding server in a wireless screen projection application at present is achieved.
Owner:武汉启目科技有限公司
User-friendly intelligent blind person teaching piano
The invention relates to a user-friendly intelligent blind person teaching piano. The user-friendly intelligent blind person teaching piano comprises a body provided with a piano body and piano keys;induction sheets are arranged on the surfaces of all the piano keys; a teaching board is further arranged on the front portion of a panel of the piano keys, and two sets of teaching modules are installed on the teaching board; the teaching modules comprise slide grooves formed in the teaching board, and teaching bases are slidably arranged in the slide grooves; the user-friendly intelligent blindperson teaching piano further comprises two driving cylinders arranged at the two sides of the teaching board, a conveying belt is arranged between the two driving cylinders in a sleeving mode, and the teaching board is fixedly connected with the conveying belt; a computer control board is installed in the body; the user-friendly intelligent blind person teaching piano further comprises teaching gloves, prompting units are arranged at the finger ends of the teaching gloves, and the teaching gloves are further provided with processing chips in wireless connection with a computer control board.The user-friendly intelligent blind person teaching piano is novel in structure and unique in principle, a user can be assisted in efficiently and accurately plucking the piano and learning the piano,the study difficulty is lowered, and the study interaction is improved.
Owner:凯珀瑞润滑科技(东台)有限公司
Shock-proof automobile sound box
ActiveCN107948848AThe inlay is firmEasy to replaceFrequency/directions obtaining arrangementsEngineeringMetal sheet
The invention discloses a shock-proof automobile sound box. The structure of the shock-proof automobile sound box comprises an installation head, a dust cover, a shock-proof system, a paper cone, a clamping ring, an outer shell, a limiting metal sheet, a bottom ring, a limiting ring and a connecting tube, wherein the dust cover is arranged at the center of the paper cone through the installation head; the clamping ring is arranged at the bottom part of the paper cone; the bottom ring is arranged at the bottom part of the clamping ring. The shock-proof automobile sound box disclosed by the invention is provided with a clamping mechanism, an eccentric starting mechanism, an air floating system, a position correcting structure and a height correcting system, the position of the paper cone canbe affected to shift when a voice coil tilts, so that the eccentric starting mechanism can be started, the air floating system is enabled to move so as to erect a second magnet under the transmissionof a linkage structure, the voice coil which is provided with a first magnet is enabled to move upwards according to a principle of like magnetism repelling, and the height of the voice coil can be regulated; meanwhile, under the action of the linkage structure, the voice coil can be clamped by the clamping mechanism, the balance degree in a horizontal direction of the voice coil can be corrected, both the horizontal balance degree and the height are corrected, so that the tone quality cannot be influenced even vibration is generated during an automobile driving process.
Owner:河北献瑞麒麟汽车用品制造有限公司
Earphone socket and mobile terminal thereof
InactiveCN104701658AExtend standby timeWill not cause leakageCoupling contact membersEmbedded systemCapacitance
The invention discloses an earphone socket and a mobile terminal for the earphone socket. The earphone socket comprises a first pin, a second pin connected with the right channel control module of an earphone, a third pin connected with the left channel control module of the earphone, and a fourth pin connected with the control module of a microphone, wherein the first pin is grounded; the earphone socket further comprises a fifth pin connected with the interrupt signal control module of the mobile terminal, and the fifth pin is connected with a 3.3V supply terminal through the fifth pin and grounded through a filter capacitor; the interrupt signal control module is used for conducting the fifth pin and the second pin at the high level and generating interrupt signals at the low level so that the fifth pin and the second pin disconnect; at the moment, the direct current component added to the right channel is removed, the electric leakage condition cannot be occurred when the earphone is inserted, and the tone quality of the earphone isn't affected.
Owner:黎凯华
Novel accounting computerization teaching device
ActiveCN106128189AImprove learning effectAvoid indirect transmissionElectrical appliancesElectricityWhiteboard
The invention discloses a novel accounting computerization teaching device, which comprises a main body, wherein a fixed shaft is arranged at the top end of the main body; sleeves sleeve the outer sides of two ends of the fixed shaft; the sleeves are fixedly connected to a whiteboard; a display screen is arranged on the side surface of the whiteboard; loudspeakers are arranged on the surfaces of both sides of the main body; a switch and a microphone are arranged on the upper surface of the main body; the switch is electrically connected to an external power supply; the microphone is connected to the loudspeakers by virtue of lead wires; and both the microphone and the display screen are electrically connected to the switch. By arranging universal wheels and foot brakes, the novel accounting computerization teaching device disclosed by the invention can be moved and fixed conveniently, so that the teaching device is more convenient to use; meanwhile, by arranging the display screen and the whiteboard, conventional teaching and modern media are combined, so that more diverse teaching modes are achieved and the learning effect of students is enhanced; and meanwhile, by arranging the microphone and the loudspeakers, a teacher, who gives a lesson, can be clearly heard by all persons in the class, so that learning efficiency is improved.
Owner:WEIFANG UNIV OF SCI & TECH
Saxophone mouthpiece adjusting structure
The invention discloses a saxophone mouthpiece adjusting structure. The saxophone mouthpiece adjusting structure comprises a mouth pipe, a fixing core, an adjusting core having the tail part fixedly connected with a neck pipe, an adjusting nut and an annular lock nut, wherein the fixing core includes a round ring capable of being fixedly arranged on the mouth pipe in a matching manner, and a guide key; the adjusting core includes a sleeve capable of being sheathed on the mouth pipe in a matching manner, a convex ring formed on one end of the sleeve and provided with threads on the annular circumferential surface thereof, and a guide slot penetrating through the outer surface of the sleeve, being arranged along the axial direction and being matched with the guide key; the adjusting nut includes two cylindrical structures being arranged coaxially and having different diameters; internal threads matched with the external threads on the convex ring are formed on the inner cavity wall of the small-diameter part; and the large-diameter part accommodates the round ring and is fixedly connected with the lock nut on the opposite side of the guide key. The saxophone mouthpiece adjusting structure has the advantages of smart design and compact structure, can obviate the toning step before each use and improve the adjusting accuracy, thereby facilitating use.
Owner:TIANJIN JINBAO MUSICAL INSTR
Forming die, forming die making method and bodiless Guqin making method
InactiveCN107358936ASave Wood for Musical InstrumentsAlleviate resource crisisStringed musical instrumentsEngineeringTechnician
The invention provides a forming die, a forming die making method and a bodiless Guqin making method and relates to the musical instrument manufacturing technology field. The forming die comprises a plaster die body and a first convex block and a second convex block which are mounted on the plaster die body, wherein the plaster die body comprises a work surface, the first convex block and the second convex block are both mounted on the work surface, the work surface and surfaces of the first convex block and the second convex block form a base surface, and multiple composition layers are attached to the base surface when a bodiless Guqin is made. The forming die is advantaged in that the long-term ingrained conception of the wooden qin is broken through, prejudice of technicians in the field is solved, not only can timber resource crises of musical instruments be alleviated, but also timbre and tone quality are not influenced, a problem of consumption of plenty of timber of the Guqin production process in the prior art is ameliorated, and the forming die is suitable for large-scale production.
Owner:汤桥桥
High-frequency alternating-current power supply control circuit of electron tube power amplifier
ActiveCN111934564ADoes not affect lifeSimple structureMicrophonesAc-dc conversion without reversalLoad circuitElectron current
The invention discloses a high-frequency alternating-current power supply control circuit of an electron tube power amplifier. A high-frequency alternating-current power supply comprises a [pi]-type filter circuit, a rectifying circuit, a filter circuit, a load circuit, a power-on starting circuit and an oscillating circuit which are connected in sequence, wherein the [pi]-type filter circuit is connected with commercial power, the output end of the power-on starting circuit is connected with the control end of the oscillating circuit, the input end of the oscillating circuit is connected withthe filter circuit, and the output end of the oscillating circuit is connected with the input end of the load circuit. The high-frequency alternating-current power supply control circuit has the advantages that: a novel electron tube filament power supply mode is adopted, and the problems of alternating current hum, low power factor and low efficiency of various power supplies in the prior art are effectively solved through a high-frequency alternating current power supply which has high efficiency and high frequency and does not influence the tone quality and the service life of the electrontube; and meanwhile, the technical problems that electron current emission is influenced by a deflection magnetic field generated by a low-voltage direct-current power supply and the service life ofan electron tube is influenced by weakening electron emission kinetic energy are solved; and key power device protection measures are detailed.
Owner:佛山市冉智电子科技有限公司
LED light-emitting dustproof sound box
InactiveCN106817634ADoes not affect sound qualityEasy to fixTransducer casings/cabinets/supportsEngineeringBell mouth
The invention discloses an LED light-emitting dustproof sound box, which comprises a box body, wherein the box body is provided with a bell mouth, an annular boss is further arranged on the box body, the annular boss is positioned on the annular edge portion of the bell mouth, a dustproof cover is arranged on the annular boss, the dustproof cover and the annular boss are in threaded connection, the edge portion of the dustproof cover is provided with an LED light-emitting mechanism, and the middle region of the dustproof cover is provided with a dustproof mesh. The LED light-emitting dustproof sound box is provided with the dustproof cover having the LED light-emitting mechanism and the dustproof mesh, the dustproof cover and the annular boss on the box body are in threaded connection, the dustproof cover is very convenient in fixing and just needs to be screwed tightly, the appearance of the sound box can achieve excellent beautifying effect during operation of the LED light-emitting mechanism, and the dustproof function is achieved and the sound quality effect of the sound box is not affected by arranging the dustproof mesh on the dustproof cover.
Owner:CHONGQING CITY CHANGSHOU DISTRICT SHICAI TECH
An anti-vibration car stereo
ActiveCN107948848BThe inlay is firmEasy to replaceFrequency/directions obtaining arrangementsEngineeringMetal sheet
The invention discloses an anti-vibration car stereo, the structure of which comprises a mounting head, a dust cover, an anti-vibration system, a paper cone, a collar, an outer shell, a limit metal sheet, a bottom ring, a limit ring, a connecting pipe, and an anti-vibration The dust cover is installed in the middle of the paper cone through the installation head, the bottom of the paper cone is installed with a collar, and the bottom of the collar is installed with a bottom ring. The invention is equipped with a clamping mechanism, an eccentric starting mechanism, an air floating system, a positive position structure, Height correction system, when the voice coil is skewed, it will affect the position of the paper cone to shift, thereby starting the eccentric starting mechanism, and under the transmission of the linkage structure, the air floating system will move to push the second magnet upwards, and the installation will be made according to the principle of same-sex repulsion. The voice coil with the first magnet moves up to adjust the height of the voice coil. At the same time, under the action of the linkage structure, the clamping mechanism will clamp the voice coil to correct its horizontal balance. The horizontal balance and height are corrected. Vibration in the process of driving the car will not affect its sound quality.
Owner:河北献瑞麒麟汽车用品制造有限公司
A page-turning device in a piano score-turning system
The invention belongs to the technical field of musical instruments, relates to a page turning device in a piano page turning system, and solves the problems that a piano page turning system in the prior art is great in dependency on an external power supply, and the like. A piano comprises a main body and a supporting column, wherein the supporting column is perpendicularly fixed to the lower surface of the main body; the page turning device comprises a rotary disc which is rotatably arranged on the upper surface of the main body; the side wall of the rotary disc is fixedly equipped with a sucking rod which can move to a position above a music score; a magnet capable of sucking pages of the music score is arranged on the sucking rod; the page turning device further comprises a rotary shaft, wherein the rotary shaft is rotatably arranged on the main body in the vertical direction; a transmission mechanism for enabling the rotary shaft and the rotary disc to synchronously rotate is arranged between the upper end of the rotary shaft and the rotary disc; and the lower end of the rotary shaft is equipped with a plurality of driving levers. The page turning device has the advantage of being capable of turning the music score without an external power supply.
Owner:LIAOCHENG YULIN IND DESIGN CO LTD
Far-field audio amplification method and system based on cloud data
ActiveCN110580906ADoes not affect sound qualityAvoid interferenceDigital data information retrievalPublic address systemsText annotationSound quality
The invention discloses a far-field audio amplification method based on cloud data. The method comprises the steps: obtaining far-field audio data through a sound collection device; obtaining the far-field audio data by a recording sound card and saving the far-field audio data to a processor; converting the far-field audio data into a far-field text annotation by a processor according to a far-field model database; obtaining near-field audio data from a near-field model database according to the far-field text annotation, wherein the near-field audio data is used for amplified playing. According to the invention, the sound can be amplified without affecting the sound quality of the sound, noises can be removed, interference caused by echoes is effectively avoided, and the sound in different distance scenes is selectively played, a more human-friendly effect is realized, and the sound is clearer.
Owner:ANHUI SEMXUM INFORMATION TECH CO LTD
Direction-adjustable sound box
InactiveCN104581453ADoes not affect sound qualityReduce labor intensityFrequency/directions obtaining arrangementsTransducer casings/cabinets/supportsEngineeringSound box
The invention relates to a direction-adjustable sound box which comprises a sound box body, wherein a rotary device is arranged at the lower part of the sound box body, and comprises a supporting plate used for holding the sound box body and a base rotationally connected with the supporting plate through a rotary unit. According to the direction-adjustable sound box, the rotary device is arranged on the basis of an existing sound box; the direction-adjustable sound box is simple in structure and convenient to implement; one person can very easily finish adjustment of direction of the sound box through the rotary device, so that the sound box is protected and the labor intensity of working personnel is reduced.
Owner:济源市乐享科技有限公司
Guzheng musical instrument cavity resistance volume adjustment mechanism
The invention discloses a sound cavity resistance volume adjusting mechanism of musical instruments such as a zither, wherein a connecting column is fixed between an upper wall and a lower wall of a sound cavity; an outer gear sleeve sleeves the connecting column; a left sound insulation cloth leaf and a right sound insulation cloth leaf are symmetrically fixed on the circumferential side surfaceof the outer gear sleeve; two outer ends of the left sound insulation cloth leaf and the right sound insulation cloth leaf are connected with traction ropes respectively; outer ends of the traction ropes at two sides are connected with elastic traction components respectively; a driving mechanism for driving the outer gear sleeve to rotate and stagnate is arranged on a sound cavity wall at one endof the connecting column. The mechanism can be applied to the sound cavity of the zither or a Guqin, and is used for increasing the sound resistance and resonance of the sound cavity properly, the stability of the sound color and the sound are improved, the sound resistance degree can be adjusted according to characteristics of different zithers or Guqin, and the optimal configuration is achieved.
Owner:HENAN POLYTECHNIC
Earphone
ActiveCN109246523ADoes not affect sound qualityLarge frequency response decibel valueMicrophonesLoudspeakersAcoustic energyEngineering
An earphone has a housing with a signal process unit to output sound. The housing has a chamber and a speaker mounted inside the chamber. The chamber is defined as a front volume and a rear volume bythe speaker, and the rear volume having a port. Wherein the speaker in the volume outputting a chamber frequency response curve is at least a portion higher than the earphone's ideal frequency response curve at the bandwidth ranging from 20 Hz to 1000 Hz, where creates a gain difference between the chamber frequency response curve and the ideal frequency response curve to be decreased the (superfluous) positive value by a signal process unit at the bandwidth ranging from 20 Hz to 1000 Hz. Therefore, the total acoustic energy is maintained, the earphone acoustic quality is preserved, and the earphone volume may output even higher power to be deduced by the signal process unit for lowering down the circuit power consumption.
Owner:MERRY ELECTRONICS (SHENZHEN) CO LTD
Humanized Intelligent Teaching Piano for the Blind
The invention relates to a user-friendly intelligent blind person teaching piano. The user-friendly intelligent blind person teaching piano comprises a body provided with a piano body and piano keys;induction sheets are arranged on the surfaces of all the piano keys; a teaching board is further arranged on the front portion of a panel of the piano keys, and two sets of teaching modules are installed on the teaching board; the teaching modules comprise slide grooves formed in the teaching board, and teaching bases are slidably arranged in the slide grooves; the user-friendly intelligent blindperson teaching piano further comprises two driving cylinders arranged at the two sides of the teaching board, a conveying belt is arranged between the two driving cylinders in a sleeving mode, and the teaching board is fixedly connected with the conveying belt; a computer control board is installed in the body; the user-friendly intelligent blind person teaching piano further comprises teaching gloves, prompting units are arranged at the finger ends of the teaching gloves, and the teaching gloves are further provided with processing chips in wireless connection with a computer control board.The user-friendly intelligent blind person teaching piano is novel in structure and unique in principle, a user can be assisted in efficiently and accurately plucking the piano and learning the piano,the study difficulty is lowered, and the study interaction is improved.
Owner:凯珀瑞润滑科技(东台)有限公司
Earphone socket and mobile terminal thereof
ActiveCN101950867BWill not cause leakageDoes not affect sound qualityCoupling contact membersElectricitySound quality
The invention discloses an earphone socket and a mobile terminal thereof. The earphone socket comprises a first pin, a second pin, a third pin, a fourth pin and a fifth pin, wherein the first pin is connected with the ground, the second pin is connected with an earphone right-channel control unit, the third pin is connected with an earphone left-channel control unit, the fourth pin is connected with a microphone control unit, and the fifth pin is connected with an interruption signal control unit; the fifth pin is connected with a power supply through a first resistor; and the interruption signal control unit is used for conducting the fifth pin and the second pin when at a high level and generating an interruption signal when at a low level to disconnect the fifth pin and the second pin.When an earphone is not inserted, the fifth pin and the second pin are conducted; and when the earphone is inserted, the interruption signal control unit is jumped into the low level, so that the fifth pin and a right channel are disconnected, a direct-current component added on the right channel is removed at the moment, an electricity leakage condition can not be caused when the earphone is inserted, and the sound quality of the earphone is not influenced.
Owner:山东摄云信息技术有限公司
Sound box body structure capable of improving the low frequency of a sound box
PendingCN109803202AEasy to controlSimple designFrequency/directions obtaining arrangementsEnergy controlEngineering
The invention discloses a sound box body structure capable of improving the low frequency quantity of a sound box. The device comprises a first cylinder body, a second cylinder body and a third cylinder body are arranged in the first cylinder body respectively; the height of the first barrel body is greater than that of the second barrel body; the height of the second barrel body is greater than that of the third barrel body; furthermore, the first barrel body is provided with a first baffle; wherein the diameter of the first barrel body is gradually reduced, the diameter of the second barrelbody is sequentially reduced, the third barrel body is fixedly connected with the second barrel body through an annular sealing plate, a loudspeaker is fixedly arranged on the second barrel body, a connecting column is arranged on the outer wall of the second barrel body, a sliding button is arranged on the connecting column, and a groove is formed in the sliding button. The frequency and energy control device has the advantages that the structure is simple, complex design is not involved, and control over frequency and energy can be achieved by controlling the distance between the second barrel body and the first barrel body. And when the sound box is debugged, the position of the arc-shaped baffle plate is changed according to listening, and the exposed number of the sound through holesis adjusted. And a better sound box can be designed.
Owner:杨文洪
Spittle prevention hood of headset microphone
InactiveCN108810686AAvoid indirect transmissionSimple structureMouthpiece/microphone attachmentsEngineeringSound quality
The invention relates to a headset accessory, and specifically relates to a spittle prevention hood of a headset microphone. The spittle prevention hood comprises a hood body I and a hood body II, wherein the hood body I and the hood body II are connected through a magic tape, the hood body I and the hood body II have the same size and are arranged opposite, the hood body I is made of high densityhigh elastic sponge, and the hood body II is made of a waterproof material. The spittle prevention hood has a simple structure, is convenient to use, is breathable, does not affect sound quality, isattractive and is easy to use, effectively prevents diseases and viruses from spreading indirectly, can prevent dust and is convenient to carry.
Owner:向涛
A new type of accounting computerized teaching device
ActiveCN106128189BImprove learning effectAvoid indirect transmissionElectrical appliancesElectricityWhiteboard
The invention discloses a novel accounting computerization teaching device, which comprises a main body, wherein a fixed shaft is arranged at the top end of the main body; sleeves sleeve the outer sides of two ends of the fixed shaft; the sleeves are fixedly connected to a whiteboard; a display screen is arranged on the side surface of the whiteboard; loudspeakers are arranged on the surfaces of both sides of the main body; a switch and a microphone are arranged on the upper surface of the main body; the switch is electrically connected to an external power supply; the microphone is connected to the loudspeakers by virtue of lead wires; and both the microphone and the display screen are electrically connected to the switch. By arranging universal wheels and foot brakes, the novel accounting computerization teaching device disclosed by the invention can be moved and fixed conveniently, so that the teaching device is more convenient to use; meanwhile, by arranging the display screen and the whiteboard, conventional teaching and modern media are combined, so that more diverse teaching modes are achieved and the learning effect of students is enhanced; and meanwhile, by arranging the microphone and the loudspeakers, a teacher, who gives a lesson, can be clearly heard by all persons in the class, so that learning efficiency is improved.
Owner:WEIFANG UNIV OF SCI & TECH
Piano score page turning system
The invention belongs to the technical field of musical instruments, and relates to a piano score page turning system. The system solves the problem in the prior art that the existing piano score pageturning system has high dependence on an external power supply. The system comprises a main body. A piano comprises a music stand and a page turning device. The music stand comprises a substrate anda music sheet, and the substrate is fixed on the main body. The music sheet comprises a first vertical rod and a second vertical rod. The outside of the first vertical rod is hinged to the substrate,and vertical grooves are distributed between the first vertical rod and the second vertical rod and in the inner sides of the two vertical rods. The lower ends of the first vertical rods and the second vertical rod are fixedly connected by a cross rod, and the inside of the cross rod is provided with a lateral groove. The surface of the cross rod is provided with a metal sheet capable of being adsorbed by a magnet. The page turning device comprises a rotating disc, the side wall of the rotating disc is fixedly provided with a suction rod, and the side wall of the suction rod is fixedly provided with the magnet. The turning device further comprises a rotating shaft arranged on the main body in the rotating mode, a transmission mechanism is arranged between the upper end of the rotating shaft and the rotating disc, and a poking rod is arranged at the lower end of the rotating shaft. The system has the advantage of being capable of turning pages without the external power supply.
Owner:HUNAN CITY UNIV
Television set
InactiveCN107181925ADoes not affect sound qualityIncrease in sizeTelevision system detailsColor television detailsDiffraction effectSound quality
The embodiment of the invention relates to the technical field of television sets, and especially relates to a television set. The television set comprises a support and a television set body disposed on the support. The interior of the television set body is provided with a mainboard and a low-frequency loudspeaker, and the mainboard is provided with a loudspeaker interface unit. The mainboard is connected with the low-frequency loudspeaker through the loudspeaker interface unit. The external surface of the support is provided with a high-frequency loudspeaker. The mainboard is connected with the high-frequency loudspeaker through the loudspeaker interface unit. It is observed that the high-frequency loudspeaker can directly generate sound because the high-frequency loudspeaker is disposed on the support, not in the television body, thereby enabling the sound to be more natural and clearer. Due to the consideration to the bigger size of the low-frequency loudspeaker and the better diffraction effect of low-frequency sound, the low-frequency loudspeaker is placed in the television set body, so the television set is enabled to be beautiful and the sound quality cannot be affected.
Owner:HISENSE VISUAL TECH CO LTD
Tilt-shift erhu with sound window in waist
ActiveCN104064167AImprove pronunciationBig vibrationStringed musical instrumentsPull forceSound generation
The invention relates to a tilt-shift erhu with a sound window in the waist. The tilt-shift erhu comprises an erhu neck and an erhu canister, the erhu neck is arranged at the upper end of the erhu canister, skin is arranged at one end of the erhu canister, and the sound window is formed in the other end of the erhu canister; the sound window comprises an arc-face sound window body and a polygonal-face sound window body, the arc-face sound window body is located on the front face of the erhu canister, the polygonal-face sound window body is located on the end face of the erhu canister, and the arc-face sound window body and the polygonal-face sound window body are arranged in an adjacent mode; the erhu neck is arranged at the 2 / 5 position of the erhu canister and is close to the skin end. By means of the tilt-shift erhu, as the neck is titled, namely the position of the erhu neck of the erhu is changed, generated high-frequency sounds can be strengthened, and low-frequency vibration can be enlarged; the structure of the erhu canister is changed, the abnormal-shaped sound window is formed in one end of the erhu canister, the problem of vibration of a high sound region can be solved, the sound quality of the high sound region is improved, and the sound quality of a middle sound region and a low sound region is not influenced; the area of the skin and the width of edge skin are controlled, it can be guaranteed that incapability of high sound generation due to the fact that the high sound region is rapidly collapsed is avoided after large pull force is borne, and the tilt-shift erhu is not influenced by the damp environment, and the service life is prolonged.
Owner:何薇
A method and system for far-field audio amplification based on cloud data
ActiveCN110580906BDoes not affect sound qualityAvoid interferenceDigital data information retrievalPublic address systemsText annotationNoise
Owner:ANHUI SEMXUM INFORMATION TECH CO LTD
Waist Window Shift Erhu
ActiveCN104064167BImprove pronunciationBig vibrationStringed musical instrumentsSound generationEngineering
Owner:何薇
Horn monomer and an in-ear type earphone and its design method
InactiveCN106454583AWill not affect the sound effectGuaranteed sealing performanceIntra aural earpiecesSound qualityHeadphones
The invention discloses a horn single body and an in-ear type earphone and its design method. The horn monomer includes a horn monomer body. A horn front end is integrated on the horn monomer body; the horn front end is provided with a sound making hole. The empty cavity included in the horn front end forms the front cavity of the horn monomer. According to the invention, the horn monomer and the horn front end are integrated as one, which includes the front cavity of the horn monomer. And at the same time, the horn front end of the earphone's horn monomer can directly extend out of the earphone casing through the hole on the earphone casing so as to transmit the sounds directly to the ear of a user and to ensure that the horn monomer is completely sealed. In this way, the horn monomer can hardly be damaged due to external forces and the condition can be avoided that the horn front end is split from the horn monomer to cause ill-sealing; and the air leakage and sound cut at the front cavity of the horn monomer can also be avoided. Therefore, according to the invention, the horn monomer can be sealed completely to effectively prevent the occurrence of air leakage and sound cut and to ensure the sound quality of the earphone.
Owner:GEER TECH CO LTD
Erhu multifunctional adjuster and the main bridge used in conjunction with the adjuster
InactiveCN104934018BEffective protectionAvoid slack scrapping situationsStringed musical instrumentsStructural engineeringMechanical engineering
The invention relates to an Erhu multi-functional adjuster and a main bridge used in cooperation with the same and belongs to the Erhu auxiliary tool technical field. With the Erhu multi-functional adjuster adopted, when an Erhu is not used, the skin of the Erhu can be well protected, and the playing volume of the Erhu can be decreased. The Erhu multi-functional adjuster of the invention comprises a rack body. The Erhu multi-functional adjuster is characterized in that the front end of the rack body is provided with a string channel opening; the frame body is provided with an installation groove; a rod shifting device is arranged in the installation groove; the front end of the rod shifting device is provided with a lifting shifting fork; the lifting shifting fork is corresponding to the string channel opening; a string groove corresponding to the string channel opening is arranged in the rod shifting device; two sides of the rod shifting device are provided with sliding shafts; and the rack body is provided with limiting frames corresponding to the sliding shafts; and the rack body is provided with a locking hook corresponding to the tail end of the rod shifting device.
Owner:曹梦尧
A High Frequency AC Power Supply Control Circuit for Electron Tube Power Amplifier
ActiveCN111934564BDoes not affect lifeSimple structureMicrophonesAc-dc conversion without reversalLoad circuitPower factor
The invention discloses a high-frequency AC power supply control circuit for an electron tube power amplifier. The high-frequency AC power supply includes a sequentially connected π-type filter circuit, a rectifier circuit, a filter circuit, a load circuit, a power-on start-up circuit and an oscillation circuit; the π-type filter circuit Connected to the mains, the output end of the power-on start-up circuit is connected to the control end of the oscillation circuit, the input end of the oscillation circuit is connected to the filter circuit, and the output end of the oscillation circuit is connected to the input end of the load circuit. Its advantage is that it adopts a new type of electronic tube filament power supply mode, and effectively solves the AC hum of various power sources in the prior art through high-efficiency, high-frequency, high-frequency AC power that neither affects sound quality nor affects the life of the electronic tube. , low power factor and low efficiency; at the same time, it also solves the technical problems that the deflection magnetic field generated by the low-voltage DC power supply affects the electron current emission, and the weakened electron emission kinetic energy affects the life of the electron tube; the key power device protection measures are comprehensive.
Owner:佛山市冉智电子科技有限公司
earphone
ActiveCN109246523BDoes not affect sound qualityLarge frequency response decibel valueMicrophonesLoudspeakersAcoustic energyEngineering
An earphone has a housing with a signal process unit to output sound. The housing has a chamber and a speaker mounted inside the chamber. The chamber is defined as a front volume and a rear volume bythe speaker, and the rear volume having a port. Wherein the speaker in the volume outputting a chamber frequency response curve is at least a portion higher than the earphone's ideal frequency response curve at the bandwidth ranging from 20 Hz to 1000 Hz, where creates a gain difference between the chamber frequency response curve and the ideal frequency response curve to be decreased the (superfluous) positive value by a signal process unit at the bandwidth ranging from 20 Hz to 1000 Hz. Therefore, the total acoustic energy is maintained, the earphone acoustic quality is preserved, and the earphone volume may output even higher power to be deduced by the signal process unit for lowering down the circuit power consumption.
Owner:MERRY ELECTRONICS (SHENZHEN) CO LTD
Drum silencer
ActiveCN102201228BDoes not affect sound qualityFeel goodPercussion musical instrumentsResonanceEngineering
The invention relates to an auxiliary device for percussion instruments. A drum muffler comprises a rubber cushion, a supporting rod and a mounting seat and is characterized in that: the rubber cushion is a hollow circular structure or a middle dented basin-shaped structure which is mounted on a supporting plate; the supporting plate is mounted on the left end of the supporting rod; the right end of the supporting rod is mounted on the mounting seat with a rotary pushing mechanism through two rotary shafts; and the rotary pushing mechanism can make the supporting rod rotate by taking the rotary shaft on the right end as the axle centre. The drum muffler has the advantages that: because a cavity is formed in the middle of the rubber cushion, drumsticks do not beat the rubber cushion directly, the hand feel of beating drum skin is better during a practice and resonance is avoided; and thus, good sound attenuation effect is achieved, the problem of disturbing residents is solved and the rubber cushion can be separated from the drum skin and set upright during a normal performance without influence on the tonal quality of the drum. The invention is artful in design, low in cost, easy for popularizing and suitable for various drum percussion instruments.
Owner:钱和革 +1
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