46results about How to "High vocal efficiency" patented technology

A thermal sounding device comprises a substrate, a thermal sounding element arranged on the surface of the substrate, and a heating device used for providing energy to the thermal sounding element to enable the thermal sounding element to produce heat, wherein the thermal sounding element comprises a composite film, the composite film comprises at least a first carbon nano tube layer and at least one graphene film with the first carbon nano tube layer and the graphene film being stacked over each other, the substrate comprises a carbon nano tube composite structure, and the carbon nano tube composite structure comprises a second carbon nano tube layer and an insulation material layer coated on the surface of the second carbon nano tube layer. The invention further provides an electronic device using the thermal sounding device.

The invention relates to a power amplification circuit for a thermally induced sound-producing device, which comprises a peak holding circuit, an addition and subtraction circuit and a power amplifier. The peak holding circuit is used for receiving an audio electrical signal and outputting a peak holding signal; the addition and subtraction circuit is used for receiving the audio electrical signal and the peak holding signal, comparing the audio electrical signal and the peak holding signal, carrying out calculation and then outputting a modulation signal; and the power amplifier is used for receiving the modulation signal and amplifying and outputting the modulation signal. The invention also relates to the peak holding circuit and the thermally induced sound-producing device.

The invention relates to a klaxon control method. A klaxon primary sound pressure level stabilization control method comprises that: firstly, a power supply voltage is detected by utilizing an analogue-to-digital conversion function of a singlechip; secondly, the singlechip determines the duty ratio of a current klaxon drive signal according to corresponding relationships between detected power supply voltage values and the duty ratios of klaxon drive signals, and adopts a natural frequency value of a klaxon stored in the singlechip or a nonvolatile data memory as the frequency of the current klaxon drive signal; and finally, the singlechip outputs the klaxon drive signal which is subjected to power amplification to drive the klaxon to work and is a square signal. The invention provides the klaxon primary sound pressure level stabilization control method through which a sound pressure level can be automatically stabilized, and a klaxon intelligent control method with the advantages of environmentally-friendly sound-production function and capability of automatically adjusting drive frequency in real time and automatically stabilizing the sound pressure level.

A display device includes a display panel; a support structure at a rear of the display panel; a sound generation actuator supported by the support structure and configured to vibrate the display panel to generate sound; and a cap member surrounding the sound generation actuator and secured to the support structure at an area of the support structure, the area being near the sound generation actuator.

The present invention relates to a sound box used for loudspeakers, in particular to the television sound box of a loaded double folding type acoustic horn. A casing body is provided with loudspeakers according to the technical proposal provided by the present invention. The present invention is characterized in that the casing body comprises a middle casing body and an internal casing body, wherein the middle casing body has a bottom part and a loudspeaker shaped side wall expanding outwards, and mounting holes used for the installation of loudspeakers are arranged at the center of the bottom part of the middle casing body; the internal casing body is positioned in the middle casing body, also has a bottom part and a loudspeaker shaped side wall, the opening of the internal casing body is pointed at the bottom part of the middle casing body, and an acoustic horn cavity folded forwards is formed between the internal casing body and the middle casing body. The present invention adopts an entire frequency band loudspeaker unit, to enhance the sound pressure of the loudspeaker unit and the efficiency of low frequency band better, thus enhancing the acoustic quality of television sound boxes.

The invention relates to an intelligent control method and an intelligent control device for an electric horn. The dynamic frequency stabilization control method for the electric horn comprises the following steps of: driving the electric horn to work after square wave signals output by a singlechip are subjected to power amplification, then adjusting the frequency of the square wave signals in amode of gradual increasing or gradual reducing with adjusting quantity of 0.005 to 5.0Hz, and meanwhile, detecting the vibration strength of a vibrating diaphragm of the electric horn through the singlechip so as to find the natural vibration frequency of the electric horn. The control device of the electric horn comprises a bowl-shaped bottom shell, a static iron core, a dynamic iron core, a coil, the vibrating diaphragm and a control circuit, wherein the control circuit comprises a micro processing module, a power supply module, a coil driving module, a key input module and a vibrating diaphragm vibration signal detecting module. The invention provides the intelligent control method and the intelligent control device for the electric horn, which can automatically adjust the driving frequency in real time and automatically stabilize the sound pressure level, wherein the device has environment-friendly sound production function and is convenient to connect keys.

A suspended nanotube film (or films) producing sound by means of the thermoacoustic (TA) effect is encapsulated between two plates, at least one of which vibrates, to enhance sound generation efficiency and protect the film. To avoid the oxidation of carbon nanotubes at elevated temperatures and reduce the thermal inertia of surrounding medium the enclosure is filled with inert gas (preferably with high heat capacity ratio, γ=Cp / Cv, and low heat capacity, Cp). To generate sound directly as the first harmonic of applied audio signal without use of an energy consuming dc biasing, an audio signal modulated carrier frequency at much higher frequency is used to provide power input. Various other inventive means are described to provide enhanced projected sound intensity, increased projector efficiency, and lengthened projector life, like the use of infrared reflecting coatings and particles on the projector plates, non-parallel sheet alignment in sheet stacks, and cooling means on one projector side.

The invention discloses an echo koto which comprises a koto box, a front Yueshan (1), a rear Yueshan (2), string columns (3), threads (4) and string nails (5), wherein the koto box is composed of a face plate (6), a front side plate (7), a rear side plate (8), a bottom plate (9), a koto head (10) and a koto tail (11), a beam frame (12) used for supporting the face plate is arranged inside the koto box, a plurality of pronunciation holes are formed in the bottom plate, two circular pronunciation holes (6.1) are formed in the face plate, a cellular board (13) with dense round holes is embedded inside the koto box, four elliptical pronunciation holes (9.1) are formed in the bottom plate, four pronunciation holes (13.1) which are the same with the pronunciation holes in the bottom plate in shape are also formed in the cellular board, and the pronunciation holes in the cellular board and the pronunciation holes in the bottom plate are arranged in a staggered manner. According to the echo koto provided by the invention, the cellular board is embedded in the koto box, the elliptical pronunciation holes in the cellular board and the pronunciation holes in the bottom plate are formed in a staggered manner, so that the audio penetrating power is enhanced.

The invention discloses a vocal music pronunciation training system, and relates to the technical field of vocal music training, and the vocal music pronunciation training system comprises a sound collection module, a sound preprocessing module, a feature extraction module, a model construction module, and a standard pronunciation database module. The system has the advantages that the standard vocal music pronunciation data is pronunciated through the exclusive sound model of the trainee, so that the difference between the current vocal music pronunciation of the trainee and the standard vocal music pronunciation can be visually displayed, and the difference coefficient between the sound of the trainee and the standard pronunciation is analyzed through the comparative analysis module; according to the vocal music pronunciation training method, different types of vocal music pronunciation training schemes are formulated in a personalized manner according to the difference, and the personalized training scheme considers the individual difference between different trainers instead of using the same training scheme by all trainers traditionally, so that the training efficiency is improved. And the pertinence and effectiveness of training are further ensured.

The embodiment of the invention discloses a loudspeaker, a loudspeaker module and electronic equipment. The loudspeaker comprises a support, a first vibrating diaphragm, a first piezoelectric plate and a moving-coil loudspeaker core. The periphery of the first vibrating diaphragm is fixed to the support, and the first piezoelectric plate is fixed to the middle of the first vibrating diaphragm. The moving-coil loudspeaker inner core is fixed on the support, the moving-coil loudspeaker inner core and the first vibrating diaphragm are arranged in a spaced mode, the moving-coil loudspeaker inner core comprises a second vibrating diaphragm, the second vibrating diaphragm faces the first vibrating diaphragm, the second vibrating diaphragm, the support and the first vibrating diaphragm jointly define a front cavity, the support is provided with a sound outlet hole, and the sound outlet hole is communicated with the front cavity and the external space of the loudspeaker. The first vibrating diaphragm and the second vibrating diaphragm of the loudspeaker are oppositely arranged and share the front cavity, so that the medium-high frequency response of the loudspeaker is complemented, and the overall loudness of the loudspeaker is improved.

The invention discloses a sonic ash remover capable of realizing airflow cutting based on cam movement. The sonic ash remover comprises a mechanical case and an air chamber, wherein the air chamber is a sound production device of the ash remover; a loudspeaker is connected to one side of an air outlet outside the air chamber, and high-pressure air from an air compressor is connected to one side of an air inlet; the air inlet is communicated with the air outlet through an air passage; a cam is arranged in the mechanical case, and is driven by a driving device to rotate; a guide wheel tangential to the outer circle of the cam is further arranged in the mechanical case, and is connected with a connecting rod through an elastic device; the other end of the connecting rod is connected with a covering piece which reciprocally moves up and down under the action of the connecting rod; high-pressure airflow in the air passage flows out from the outlet side of the air chamber at high speed in a pulsing manner to form sonic waves.

A thermoacoustic device comprises a substrate, and the thermoacoustic device further comprises at least one thermogenic device and a plurality of thermoacoustic elements, wherein the plurality of thermoacoustic elements are separately arranged on the substrate, the thermogenic device is used for providing energy to the thermoacoustic elements to make the thermoacoustic elements generate heat, and at least one of the plurality of thermoacoustic elements comprises a graphene film. The invention further provides an electronic device using the thermoacoustic device.

The invention discloses an elastic film sound production medium motor-driven panel loudspeaker. Magnetic steel (3) is provided with a voice coil (4), and the voice coil (4) pushes a sound production medium to produce sound. The elastic film sound production medium motor-driven panel loudspeaker is characterized in that the pushing voice coil (4) of the loudspeaker is directly pasted on a sound production film (5) which has the thickness of less than 0.1mm and is made of stainless steel or aluminum or other thinner nonmetal flexible materials, such as terylene; the sound production film (5) is tightened to a fixed frame (1); and the magnetic steel (3) of the motor-driven panel loudspeaker is also suspended on the fixed frame (1) through an elastic connecting sheet (2). According to the invention, because the elastic state of the sound production medium overcomes the division distortion caused by light and thin materials, the manufactured panel loudspeaker is extremely high in sound production efficiency, is good in transient response, is wide in voice range, and has pleasing sound; the manufacturing technology is simple and is low in cost; and because the loudspeaker is high in efficiency, the power of audio frequency power amplifier can be lowered greatly, the volume of power amplifier can be reduced, and energy is saved.

The invention relates to a key-press input module which comprises a motor vehicle horn key-press, a stabilivolt tube DW2, a resistance R3 and a resistance R4, wherein one end of the motor vehicle horn key-press is connected with the power output positive end or the power output negative end of a motor vehicle battery jar, the other end of the motor vehicle horn key-press is connected with a digital signal input end IN1 of a single chip microcomputer through the resistance R3, the digital signal input end IN1 of the single chip microcomputer is also connected with a digital signal output end O1 through the resistance R4 and also the cathode of the stabilivolt tube DW2, the anode of the stabilivolt tube DW2 is in grounding, and one end of the motor vehicle horn key-press is connected with the power output positive end or the power output negative end of the motor vehicle battery jar through a single-pole double-throw switch. The invention provides the key-press input module which has the advantages of simple structure and convenient use.

A thermoacoustic device comprises a thermogenic device and a thermoacoustic element. The thermogenic device is used for providing energy to the thermoacoustic element to make the thermoacoustic element generate heat. The thermoacoustic element comprises a graphene film. The invention further provides an electronic device using the thermoacoustic device.

The invention discloses an open pronouncing device including, a magnetic steel with splint, a T-shaped soft iron core, a spring plate and a driving coil, in which, the driving pole is installed on the bottom of the coil, under which, a balance film maintaining the pronouncing device stable is fixed. The T-shaped soft iron core incases in the middle alnico and splint, which forms a certain slot. The connection of driving coil and spring plate fixes in the slot and can move reciprocating through electromagnetic effect. When getting through the driving current, the driving coil generates electromagnetic effect with iron core, alnico and splint, from which, kinetic energy will be conveyed by driving pole. If it is placed on any plane, kinetic energy will be transmitted to the plane and give out sound and cause surface resonate.

The utility model discloses a thin loudspeaker of an alto cone frame, which comprises a fixed seat, a connecting block sleeved at the upper end of the fixed seat, a sensing assembly arranged at one side of the outer end of the connecting block, a cone fixedly connected at the upper end of the connecting block, and a plurality of threaded holes arranged at the periphery of the top end of the cone. Wherein the upper end of the sound basin is provided with an elastic ring film, the sound transmission assembly is fixedly installed in the fixed seat and is used for sound transmission, through the synergistic effect of the sound transmission assembly, the sound basin, the elastic ring film and the hemispherical cover body, accurate conversion from an electric signal to a sound wave, the magnetic field effect of the sound transmission assembly and vibration generation are realized, and the sound transmission effect is improved. The sound cone can accurately generate vibration along with the change of an electric signal, and meanwhile, the design of the elastic ring film and the hemispherical cover body further enhances the transmission effect and focusing performance of sound, so that the sound is clearer.

The present invention relates to a sound box used for loudspeakers, in particular to the television sound box of a loaded double folding type acoustic horn. A casing body is provided with loudspeakers according to the technical proposal provided by the present invention. The present invention is characterized in that the casing body comprises a middle casing body and an internal casing body, wherein the middle casing body has a bottom part and a loudspeaker shaped side wall expanding outwards, and mounting holes used for the installation of loudspeakers are arranged at the center of the bottom part of the middle casing body; the internal casing body is positioned in the middle casing body, also has a bottom part and a loudspeaker shaped side wall, the opening of the internal casing body is pointed at the bottom part of the middle casing body, and an acoustic horn cavity folded forwards is formed between the internal casing body and the middle casing body. The present invention adopts an entire frequency band loudspeaker unit, to enhance the sound pressure of the loudspeaker unit and the efficiency of low frequency band better, thus enhancing the acoustic quality of television sound boxes.

The invention relates to hollow bases of series of Qinhu, which is characterized in that the hollow bases are produced by selected mum SPP and Acer mono, the two sides of the base and the middle are stitched into rectangular opening groove type the same as the type of the bottom of the Qin cylinder respectively with mum SPP and Acer mono, the two lateral plates of the bases and the Qin cylinder are equipped with a gap, a rectangular dent is arranged in the middle of the plane in the base, the outer of the base is coated with black enamel paint. The hollow base has the advantages and effects that resonating cavity can be increased to avoid the blocking of the voice vibration, causes the happening of voice richer, the overtone is rich, the fading speed of voice is reduced, integrally increases resonant vibration function, which is favorable for strengthening sound volume, increasing sounding efficiency, adding reverberation effect and prolonging the time of the lingering sound.

The utility model discloses a treble and bass integrated loudspeaker. The treble and bass integrated loudspeaker comprises a shell and a sound amplification assembly connected with one side of the shell, a basin stand and a cover plate covering the basin stand are arranged in the shell, and a first magnetic circuit gap assembly and a second magnetic circuit gap assembly are integrated between the basin stand and the cover plate; the sound amplification assembly comprises a fixed end, a sound amplification end and a sound production end; a sound amplification cavity for sound compression is formed in the sound amplification end, the fixed end is connected with one side of the basin stand, a fixed hole communicated with the sound amplification cavity in the sound amplification end is formed in the fixed end, a sound production hole is formed in the sound production end, and the sound production hole is communicated with the sound amplification cavity in the sound amplification end. According to the utility model, the sound amplification effect is improved, the sound quality is further improved, the sound is more powerful, and the probability of loudspeaker distortion is reduced.

The invention relates to a miniature dual-drive broadband signal sounder of an automobile. The miniature dual-drive broadband signal sounder comprises two drivers. The two drivers share a bottom board and a plastic housing arranged on the bottom board, two cavities which are bilaterally symmetrical with each other are formed between the bottom board and the plastic housing, circuit boards, iron cores, coils, magnetic rings, membranes and mass slices are arranged in the cavities, the iron cores are arranged on the circuit boards, the coils are wound on the iron cores, the magnetic rings are arranged on the iron cores, the membranes are supported by the magnetic rings, the mass slices are arranged on the membranes, front cavities are formed between the plastic housing and the membranes, inner cavities are formed between the membranes and the iron cores, rear cavities are formed between the circuit boards and the bottom board, through holes are formed in the iron cores and the circuit boards, the inner cavities are communicated with the rear cavities via the through holes, and two sound production holes which are bilaterally symmetrical with each other are formed in the center of the upper wall of the plastic housing. The miniature dual-drive broadband signal sounder has the advantages that the miniature dual-drive broadband signal sounder is provided with the two drivers, the rear cavities are communicated with the inner cavities, accordingly, different frequencies can be generated by the signal sounder, the response frequency range of the signal sounder can be greatly broadened, the sound production efficiency of the signal sounder can be greatly improved, the transmitted sound volume of the signal sounder can be greatly increased, and the service range of the signal sounder can be extended.

A thermal sounding device comprises a substrate with a network structure, a thermal sounding element arranged on the surface of the substrate, and a heating device used for providing energy to the thermal sounding element to enable the thermal sounding element to produce heat, wherein the substrate comprises at least one lineage structure, the at least one lineage structure comprises a carbon nano tube lineage structure and an insulation layer positioned on the surface of the carbon nano tube lineage structure, the thermal sounding element comprises a composite film, and the composite film comprises at least one carbon nano tube layer and at least one graphene film with the carbon nano tube layer and the graphene film being stacked over each other. The invention further provides an electronic device using the thermal sounding device.

A thermal sounding device comprises a substrate with a network structure, a thermal sounding element arranged on the surface of the substrate, and a heating device used for providing energy to the thermal sounding element to enable the thermal sounding element to produce heat, wherein the substrate comprises at least one lineage structure, the at least one lineage structure comprises a carbon nano tube lineage structure and an insulation layer positioned on the surface of the carbon nano tube lineage structure, the thermal sounding element comprises a composite film, and the composite film comprises at least one carbon nano tube layer and at least one graphene film with the carbon nano tube layer and the graphene film being stacked over each other. The invention further provides an electronic device using the thermal sounding device.

A thermoacoustic device comprises a substrate, and the thermoacoustic device further comprises at least one thermogenic device and a plurality of thermoacoustic elements, wherein the plurality of thermoacoustic elements are separately arranged on the substrate, the thermogenic device is used for providing energy to the thermoacoustic elements to make the thermoacoustic elements generate heat, and at least one of the plurality of thermoacoustic elements comprises a graphene film. The invention further provides an electronic device using the thermoacoustic device.

The invention provides a differential driving structure, a screen and electronic equipment. The differential driving structure comprises a central assembly; at least four groups of peripheral components which are uniformly arranged around the central component, wherein the distances between the peripheral components and the central component are the same; the actuating directions of all the peripheral components are the same, and the actuating directions of the central component and the peripheral components are opposite. According to the invention, through a differential driving mode, the driving directions of the same sound production area are opposite at any time through the two groups of actuating assemblies with opposite driving directions, so that the vibration amplitude of the sound production area is improved, the sound production efficiency is improved, and a high-quality screen sound production effect is realized.

A thermal sounding device comprises a substrate, a thermal sounding element arranged on the surface of the substrate, and a heating device used for providing energy to the thermal sounding element to enable the thermal sounding element to produce heat, wherein the thermal sounding element comprises a composite film, the composite film comprises at least a first carbon nano tube layer and at least one graphene film with the first carbon nano tube layer and the graphene film being stacked over each other, the substrate comprises a carbon nano tube composite structure, and the carbon nano tube composite structure comprises a second carbon nano tube layer and an insulation material layer coated on the surface of the second carbon nano tube layer. The invention further provides an electronic device using the thermal sounding device.

The invention relates to a control method of an electric horn, in particular to an advanced acoustic pressure level stabilizing control method of an electric horn. The method comprises the following steps: firstly, the vibration strength of the vibration membrane of the electric horn is detected by a detecting device; the output signal value of the detecting device is compared with the set outputsignal value by utilizing a singlechip; the duty ratio of the driving signals of the electric horn is enlarged if the actual vibration strength of the vibration membrane of the electric horn is less than the set vibration strength, and otherwise, the duty ratio of the driving signals of the electric horn is reduced; the adjusting course is repeated until the deviation between the output signal value of the detecting device and the set output signal value is less than or equal to the set deviation value; the currently determined duty ratio value is taken as the duty ratio value of the current driving signals of the electric horn; and the driving signals of the electric horn is square wave signals. The invention provides the advanced acoustic pressure level stabilizing control method of theelectric horn capable of automatically stabilizing the acoustic pressure level and an intelligent control method of the electric horn capable of automatically adjusting the driving frequency in real time, automatically stabilizing the acoustic pressure level and with the functions of environment protection and sound production.