CN101711003A - Moving type sound box - Google Patents
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- CN101711003A CN101711003A CN200910108846A CN200910108846A CN101711003A CN 101711003 A CN101711003 A CN 101711003A CN 200910108846 A CN200910108846 A CN 200910108846A CN 200910108846 A CN200910108846 A CN 200910108846A CN 101711003 A CN101711003 A CN 101711003A
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Abstract
The invention relates to a moving type sound box which mainly comprises a sound box body, a loudspeaker assembly, a fixing and connecting component and a moving vibration device, wherein the sound box body is provided with an opening part and a hollow structure, the loudspeaker assembly is used for vibrating to generate sound, the fixing and connecting component is connected to the sound box body and is used for fixing the loudspeaker assembly, and the moving vibration device is arranged in the hollow structure of the sound box body and corresponds to the loudspeaker assembly. The moving vibration device is connected with the sound box body, the length direction of the moving vibration device is consistent with the length direction of the sound box body, the orthographic projection of the length direction axes of the moving vibration device and the orthographic projection of the length direction axes of the sound box body are on the same projection surface; when the sound box works, air in the hollow structure in the sound box body is driven to vibrate by the loudspeaker assembly, thereby driving the moving vibration device to vibrate and further driving the sound box body to vibrate to obtain low-frequency sound with high quality. The invention has simple structure and low cost.
Description
Technical field
The invention relates to a kind of audio playback, be meant a kind of moving type sound box that can be applied in the audio playback system especially.
Background technology
Audio amplifier refers to audio signal is transformed to a kind of equipment of sound.Popular saying just is meant in audio amplifier main frame casing or the subwoofer casing and carries power amplifier, and audio signal is carried out going out sound by the playback of audio amplifier own after the processing and amplifying, and present audio amplifier mainly comprises: loud speaker, casing, frequency divider.
Loud speaker has multiple sort-type: can be divided into electrodynamic type, electromagnetic type, piezoelectric type, digital etc. multiple by its transducing mode; Can be divided into single cone, compound cone, compound horn, coaxial etc. multiple by diaphragm structure; It is multiple to be divided into awl benzvalene form, ball top type, flat, belt etc. by vibrating diaphragm beginning; Frequently can be divided into high frequency, intermediate frequency, low frequency and full range speaker by resetting; It is multiple to be divided into external magnetic type, internal magnetization, double magnetic circuit formula and protected type etc. by the magnetic circuit form; Can be divided into ferrimagnet, neodymium boron magnet, alnico magnet loud speaker by magnetic circuit character; Can divide papery and non-cone loudspeaker etc. by diaphragm materials;
Wherein, dynamic speaker is most widely used, it utilizes the interaction force between voice coil loudspeaker voice coil and the stationary magnetic field to make the vibrating diaphragm vibration and sounding, DYN dynamic woofer is in the majority with the awl benzvalene form, Squawker mostly is awl benzvalene form or ball top type, and high pitch loudspeaker is commonly used with ball top type and belt, horn formula then;
Awl benzvalene form loud speaker simple in structure, energy conversion efficiency is higher, and the diaphragm materials that its uses is based on paper pulp material, or mixes materials such as wool, silk, carbon fiber, to increase performances such as its rigidity, internal damping and waterproof.A new generation's electrodynamic type awl basin loudspeaker has used non-papery diaphragm materials, and as composite materials such as polypropylene, mica silicon carbide/polypropylene, carbon fiber weaving, bulletproof cloth, hard aluminium foil, CD ripple, glass fibres, performance gains improves;
Ball top type loudspeaker have soft ball top and hard sphere top point, cotton, chemical fibre and the composite material of the vibrating diaphragm coloured silk silk of soft ball item loud speaker, tiffany, impregnated phenolic resin, the tonequality that is characterized in resetting is soft and graceful; Materials such as the color aluminium alloy of the vibrating diaphragm of hard sphere top loud speaker, titanium alloy and beryllium alloy, the tonequality that is characterized in resetting is clear and melodious;
The radiation mode of horn loudspeaker is different with awl benzvalene form loud speaker, and this is that sound spreads out through horn again after the vibrating diaphragm vibration.Be characterized in electroacoustic conversion and radiation efficiency is higher, distance, distortion are little, but playback frequency band and directive property are narrower;
The voice coil loudspeaker voice coil of ribbon speaker directly is produced on the whole vibrating diaphragm (aluminium alloy polyimide film etc.), directly coupling between voice coil loudspeaker voice coil and vibrating diaphragm, and alternating magnetic field and permanent magnetic field interaction that voice coil loudspeaker voice coil is produced vibrate the belt vibrating diaphragm and give off sound wave.Be characterized in that response speed is fast, distortion is little, playback tonequality exquisiteness, stereovision are good.
Casing is used for eliminating the acoustic short circuit of loudspeaker assembly, suppresses its acoustic resonance, widens its Hz-KHz, reduces distortion.The box shape structure of audio amplifier has the branch of bookshelf-type and console mode, also has vertical and horizontal branch, box inner structure has various ways such as closed, inverted phase type, band general formula, empty cone formula, labyrinth type, symmetrical drive-type and horn formula again, and using maximum is closed, inverted phase type and band general formula.
The audio amplifier that lands belongs to large-scale audio amplifier, and box height is more than 750MM, and the box height of bookshelf audio amplifier is below 750MM, and between the 450MM-750MM is medium-sized bookshelf audio amplifier, and what 450MM was following is small-sized bookshelf audio amplifier;
The preposition main sound box of household audio and video system is vertical audio amplifier, have to use bookshelf-type, also has to use console mode, and this will decide according to audiovisual studio area size, power amplifier watt level and personal preference.Usually, below 15 square metres, should select medium-sized bookshelf audio amplifier for audiovisual studio for use; Be lower than the small-sized bookshelf case of 10 square metres should select for use; Greater than 15 square metres room, can select the medium-sized bookshelf audio amplifier or the case that lands for use.Preposition main sound box, center-channel speaker and surround speaker are all in the majority with the inverted phase type design, secondly are airtight worker and 1/4 wavelength loaded type, labyrinth type etc.Sub-woofer is in the majority with band general formula and two-chamber double openings type, secondly is inverted phase type, closed.
Frequency divider has the branch of Passive and Active crossover device, and main effect all is band segmentation, amplitude-frequency characteristic and effects such as phase-frequency characteristic correction, impedance-compensated and decay.
Power divider also claims level frequency divider behind the passive type, carries out frequency division after the power power amplifier.It mainly forms FL-network by passive blocks such as inductance, resistance, electric capacity, the audio signal of each frequency range is delivered to respectively gone in the loud speaker of corresponding band to reset, be characterized in that cost of manufacture is low, simple in structure, be fit to amateurish the making, loss is big, efficient is low, transient response is relatively poor but insert;
The Active crossover device also claims active formula prime frequency divider, form by active devices such as various rescaps and transistor or integrated circuits, it generally places a kind of analogue electronic filters of preamplifier and power amplifier signal line, after being divided into different frequency range to the audio signal of preamplifier output, sending into power amplifier again and carry out processing and amplifying.Be characterized in each frequency range spectral balance, the phase mutual interference is little, and out-put dynamic range is big, and certain amplifying power is arranged itself, and the insertion loss is little.But circuit constitute want relative complex some;
Frequency divider can divide two divided-frequency, three frequency division and four frequency divisions by the frequency division frequency range.Two divided-frequency is that the whole frequency band with audio signal is divided into two frequency ranges of high and low frequency; Three frequency division is that whole frequency band is divided into high frequency, intermediate frequency and three frequency ranges of low frequency; Four frequency divisions mark off a ultralow frequency range with three frequency division more;
Part-frequency point and frequency division slope are directly to influence frequency division quality crossover frequency (handing over the * frequency);
Part-frequency point is meant that two adjacent loud speakers are (as high pitch in the two divided-frequency and bass, high pitch in the three frequency division and middle pitch, middle pitch and bass) the joining of frequency response curve on a certain frequency, be generally the frequency at half place (promptly-3dB point) of the output of power in two loud speakers, determine according to parameters such as the frequency characteristic of audio amplifier and each loud speaker and the distortion factors.Usually the part-frequency point of two divided-frequency frequency divider is got between the 1KHz-3KHZ, and three frequency division is got 250HZ-1KHZ and two part-frequency points of 5KHZ;
Frequency division slope (attenuation slope that also claims filter) is used for reflecting the descending slope of the following frequency response curve of part-frequency point, and (dB/oct) represents with decibel/octave.It has the branch of single order (6dB/oct), second order (12dB/oct), three rank (18dB/oct) and quadravalence (24dB/oct), and exponent number is high more, and the frequency curve slope behind the part-frequency point is just big more.Commonly used is second order frequency division slope.The high-order frequency divider can increase slope, but phase shift is big; Low order frequency division Lu can produce milder slope and good transient response, but amplitude-frequency characteristic is relatively poor.Determine the exponent number of high and low sound filtering mainly to should be taken into account this good connection problem of loud speaker in part-frequency point place phase place.
But owing to need above-mentioned frequency divider is installed in the at present common audio amplifier, increased the cost of audio amplifier, increased the volume of audio amplifier;
Chinese invention patent publication number CN1943270A, open day: on April 4th, 2007, denomination of invention: speaker unit; Disclose a kind of audio amplifier, having comprised: sound box with opening portion; Be used to vibrate to generate the vibrational system member of sound; Be connected to described sound box and be used for supporting the support system member of described vibrational system member in the mode that allows the vibration of described vibrational system member; Place described sound box inner and have first magnetic circuit of first magnet on the surface of described opening portion at it; And have place in the described sound box and via a clearance plane to described first magnet second magnetic circuit of second magnet, wherein, a magnetic gap is formed in described first and second magnetic circuits at least one,
Described vibrational system member comprises:
First voice coil loudspeaker voice coil; Be used for described first voice coil loudspeaker voice coil is placed the first voice coil loudspeaker voice coil bobbin of described magnetic gap; And
Non-magnet member, described non-magnet member is formed by the magnetic material that does not comprise magnet, and is connected to the described first voice coil loudspeaker voice coil bobbin directly or indirectly, so that described non-magnet member places first gap between described first magnet and second magnet;
Described vibrational system member also comprises the oscillating plate that its at least a portion is made up of described non-magnet member, the described first voice coil loudspeaker voice coil bobbin is fixed to described oscillating plate, and described support system member is supported on described oscillating plate in described first gap in the mode that allows described vibration plate vibrates.
Described second magnetic circuit comprises: the magnetic sheet towards the surface of described opening portion that is fixed to described second magnet; And place described second magnet and described magnetic sheet at least a portion on every side, and between described second magnet and described magnetic sheet, form the yoke in second gap,
Described vibrational system member also comprises the oscillating plate that the face towards the opening portion of described sound box that faces described second magnetic circuit is provided with; The audio amplifier of this kind structure can realize that small size can reproduce low-frequency sound, but this kind audio amplifier is still comparatively complicated, and implementation cost is higher.
Summary of the invention
For overcoming above-mentioned defective, purpose of the present invention promptly is to provide a kind of moving type sound box that is applied in the sound system simple in structure, lower-cost.
The objective of the invention is to be achieved through the following technical solutions:
Moving type sound box of the present invention mainly comprises the sound box with opening portion and hollow structure, is used to vibrate to generate the loudspeaker assembly of sound, be connected to described sound box and be used for fixing the dead joint member of described loudspeaker assembly,
Wherein, described moving type sound box also comprises: be arranged in the described sound box hollow structure, the vibrating device of moving of corresponding loudspeaker assembly position; This vibrating device of moving is connected with described sound box, the length direction of this vibrating device of moving is consistent with the sound box length direction, and the orthographic projection of the orthographic projection of the length-wise axis of this vibrating device of moving and sound box length-wise axis is on same perspective plane; By in the sound box hollow structure, corresponding loudspeaker assembly position is provided with the vibrating device of moving, when audio amplifier is worked, drive the air vibration in the hollow structure in the sound box by the loudspeaker assembly vibration, thereby drive this vibrating device vibration of moving, and then drive whole sound box and evenly vibrate, and then obtain high-quality low-frequency sound.
In above-mentioned moving type sound box, wherein:
Described loudspeaker assembly comprises, high frequency speaker unit and low frequency speaker unit, the described vibrating device of moving is arranged on the rear portion of the position of described low frequency speaker unit, this vibrating device of moving is connected with the bottom with the top of described sound box, and the described vibrating device and described low frequency speaker unit and cabinet wall of moving surrounds resonant space;
Described move vibrating device and described sound box flexible connection, this vibrating device of moving comprises: elastic matrix, be arranged on the center episome on this elastic matrix, be used to connect the flexible connector of elastic matrix and described sound box;
Further, described center episome comprises two center load-carrying bodies that are coated on matrix inside, the center of gravity of these two center load-carrying bodies and the center of gravity of low frequency speaker unit are on the same horizontal plane, and described loudspeaker assembly adopts dynamic speaker or awl benzvalene form loud speaker or ball top type loudspeaker or horn loudspeaker or ribbon speaker;
Further, described matrix middle part is preset with two dimples, and described two center load-carrying bodies are fixedly installed on respectively in the dimple, and the described vibrating device of moving also comprises the edge adapter that is arranged on the elastic matrix;
Further, described matrix is square or oval or circular or spherical demihull shape; Described matrix adopting thermoplasticity or thermosets;
Further, described matrix adopting wood materials;
Further, the surface of described flexible connector is bending or plane;
Described vibrating device and the described sound box of moving is rigidly connected, and this vibrating device of moving comprises: elastic matrix, be arranged on the center episome on this elastic matrix, and be used to connect the rigid connector of elastic matrix and described sound box; Described sound box is a closed cube casing,
Described loudspeaker assembly adopts dynamic speaker or awl benzvalene form loud speaker or ball top type loudspeaker or horn loudspeaker or ribbon speaker.
On the basis of said structure, further, described center episome comprises two center load-carrying bodies that are coated on matrix inside, the center of gravity of these two center load-carrying bodies and the center of gravity of low frequency speaker unit are on the same horizontal plane, the top of described matrix and described sound box is arranged vertically, and stands upright on the rear portion of described low frequency speaker unit;
Further, described matrix middle part is preset with two dimples, and described two center load-carrying bodies are fixedly installed on respectively in the dimple, and the described vibrating device of moving also comprises the edge adapter that is arranged on the elastic matrix;
Further, described matrix is square or oval or circular or spherical demihull shape; Described matrix adopting thermoplasticity or thermosets;
Further, described matrix adopting wood materials;
Beneficial effect of the present invention is: by in the sound box hollow structure, corresponding loudspeaker assembly position is provided with the vibrating device of moving, when audio amplifier is worked, drive the air vibration in the hollow structure in the sound box by the loudspeaker assembly vibration, thereby drive this vibrating device vibration of moving, and then drive whole sound box and evenly vibrate, need not use frequency divider just can obtain high-quality low-frequency sound; The vibration unit of moving is brought into play springing automatically by the air pressure in the sound box and is urged amplification strength, just as the effect that art is good for strength, and the effect that can obtain with low cost.
Description of drawings
In order to be easy to explanation, the present invention is done to describe in detail by following preferred embodiment and accompanying drawing.
Fig. 1 is the viewgraph of cross-section of the structure of a kind of execution mode of moving type sound box of the present invention.
Embodiment
See also Fig. 1, Fig. 1 is a kind of execution mode of moving type sound box of the present invention, mainly comprise sound box 1 with opening portion 11 and hollow structure, be used to vibrate to generate the loudspeaker assembly 2 of sound, be connected to described sound box 1 and be used for fixing the dead joint member 3 of described loudspeaker assembly 2
Wherein, described moving type sound box also comprises: be arranged in described sound box 1 hollow structure, the vibrating device 4 of moving of corresponding loudspeaker assembly 2 positions; This vibrating device 4 of moving is connected with described sound box 1, the length direction of this vibrating device 4 of moving is consistent with sound box 1 length direction, and the orthographic projection of the length-wise axis of this vibrating device 4 of moving and the orthographic projection of sound box length-wise axis are on same perspective plane; By in sound box 1 hollow structure, corresponding loudspeaker assembly position is provided with the vibrating device 4 of moving, when audio amplifier is worked, drive the air vibration in the hollow structure in the sound box 1 by the loudspeaker assembly vibration, thereby drive this vibrating device 4 vibrations of moving, and then drive whole sound box 1 and evenly vibrate, and then obtain high-quality low-frequency sound.
In above-mentioned moving type sound box, wherein:
Described loudspeaker assembly comprises, high frequency speaker unit and low frequency speaker unit (not shown), the described vibrating device 4 of moving is arranged on the rear portion of the position of described low frequency speaker unit, this vibrating device 4 of moving is connected with the bottom with the top of described sound box 1, and the described vibrating device 4 of moving surrounds resonant space 11 with described low frequency speaker unit and cabinet wall;
The described vibrating device 4 of moving is rigidly connected with described sound box 1, this vibrating device 4 of moving comprises: elastic matrix 41, be arranged on this elastic matrix 41 center episome 42, be used to connect the rigid connector (not shown) of elastic matrix 41 and described sound box 1; Described sound box 1 is a closed cube casing,
Described loudspeaker assembly adopts dynamic speaker or awl benzvalene form loud speaker or ball top type loudspeaker or horn loudspeaker or ribbon speaker.
On the basis of said structure, in this embodiment, described center episome 42 comprises two center load-carrying bodies 42 that are coated on matrix inside, the center of gravity of these two center load-carrying bodies 42 and the center of gravity of low frequency speaker unit are on the same horizontal plane, described matrix 41 is arranged vertically with the top of described sound box 1, stands upright on the rear portion of described low frequency speaker unit;
In this embodiment, described matrix 41 middle parts are preset with two dimples (not shown), and described two center load-carrying bodies 42 are fixedly installed on respectively in the dimple, and the described vibrating device 4 of moving also comprises the edge adapter 43 that is arranged on the elastic matrix 41;
Further, described matrix 41 is square or oval or circular or spherical demihull shape; Described matrix adopting thermoplasticity or thermosets;
Further, described matrix 41 adopts wood materials;
In the another kind of embodiment of the present invention (not shown), described move vibrating device and described sound box flexible connection, this vibrating device of moving comprises: elastic matrix, be arranged on the center episome on this elastic matrix, be used to connect the flexible connector of elastic matrix and described sound box;
This another kind embodiment, described center episome comprises two center load-carrying bodies that are coated on matrix inside, the center of gravity of these two center load-carrying bodies and the center of gravity of low frequency speaker unit are on the same horizontal plane, and described loudspeaker assembly adopts dynamic speaker or awl benzvalene form loud speaker or ball top type loudspeaker or horn loudspeaker or ribbon speaker;
This another kind embodiment, described matrix middle part is preset with two dimples, and described two center load-carrying bodies are fixedly installed in the dimple respectively;
This another kind embodiment, described matrix are square or oval or circular or spherical demihull shape; Described matrix adopting thermoplasticity or thermosets;
This another kind embodiment, described matrix adopting wood materials;
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a moving type sound box mainly comprises the sound box with opening portion and hollow structure, is used to vibrate to generate the loudspeaker assembly of sound, be connected to described sound box and be used for fixing the dead joint member of described loudspeaker assembly,
It is characterized in that described moving type sound box also comprises: be arranged in the described sound box hollow structure, the vibrating device of moving of corresponding loudspeaker assembly position; This vibrating device of moving is connected with described sound box, the length direction of this vibrating device of moving is consistent with the sound box length direction, and the orthographic projection of the orthographic projection of the length-wise axis of this vibrating device of moving and sound box length-wise axis is on same perspective plane.
2. moving type sound box as claimed in claim 1, it is characterized in that: described loudspeaker assembly comprises, high frequency speaker unit and low frequency speaker unit, the described vibrating device of moving is arranged on the rear portion of the position of described low frequency speaker unit, this vibrating device of moving is connected with the bottom with the top of described sound box, and the described vibrating device and described low frequency speaker unit and cabinet wall of moving surrounds resonant space.
3. moving type sound box as claimed in claim 2, it is characterized in that: described move vibrating device and described sound box flexible connection, this vibrating device of moving comprises: elastic matrix, be arranged on the center episome on this elastic matrix, be used to connect the flexible connector of elastic matrix and described sound box.
4. moving type sound box as claimed in claim 3, it is characterized in that: described center episome comprises two center load-carrying bodies that are coated on matrix inside, the center of gravity of these two center load-carrying bodies and the center of gravity of low frequency speaker unit are on the same horizontal plane, and described loudspeaker assembly adopts dynamic speaker or awl benzvalene form loud speaker or ball top type loudspeaker or horn loudspeaker or ribbon speaker.
5. moving type sound box as claimed in claim 4, it is characterized in that: described matrix middle part is preset with two dimples, described two center load-carrying bodies are fixedly installed on respectively in the dimple, and the described vibrating device of moving also comprises the edge adapter that is arranged on the elastic matrix.
6. moving type sound box as claimed in claim 5 is characterized in that: described matrix is square or oval or circular or spherical demihull shape; Described matrix adopting thermoplasticity or thermosets, the surface of described flexible connector is bending or plane.
7. moving type sound box as claimed in claim 2, it is characterized in that: described vibrating device and the described sound box of moving is rigidly connected, this vibrating device of moving comprises: elastic matrix, be arranged on the center episome on this elastic matrix, be used to connect the rigid connector of elastic matrix and described sound box; Described sound box is a closed cube casing,
Described loudspeaker assembly adopts dynamic speaker or awl benzvalene form loud speaker or ball top type loudspeaker or horn loudspeaker or ribbon speaker.
8. moving type sound box as claimed in claim 7, it is characterized in that: described center episome comprises two center load-carrying bodies that are coated on matrix inside, the center of gravity of these two center load-carrying bodies and the center of gravity of low frequency speaker unit are on the same horizontal plane, the top of described matrix and described sound box is arranged vertically, and stands upright on the rear portion of described low frequency speaker unit.
9. moving type sound box as claimed in claim 8 is characterized in that: described matrix is square or oval or circular or spherical demihull shape; Described matrix adopting thermoplasticity or thermosets.
10. moving type sound box as claimed in claim 9 is characterized in that: described matrix adopting wood materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910108846A CN101711003A (en) | 2009-07-27 | 2009-07-27 | Moving type sound box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910108846A CN101711003A (en) | 2009-07-27 | 2009-07-27 | Moving type sound box |
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| CN101711003A true CN101711003A (en) | 2010-05-19 |
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| CN200910108846A Pending CN101711003A (en) | 2009-07-27 | 2009-07-27 | Moving type sound box |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291647A (en) * | 2011-08-31 | 2011-12-21 | 汉得利（常州）电子有限公司 | Sound generation device capable of imitating engine sound |
| CN102523543A (en) * | 2011-11-29 | 2012-06-27 | 宁波东源音响器材有限公司 | Application of novel resin material for making sound box driver diaphragm |
| CN104113807A (en) * | 2014-06-20 | 2014-10-22 | 宁波兴隆电子有限公司 | Polar ring coverage membrane-contained ultra-thin microphone |
| CN104320733A (en) * | 2014-09-30 | 2015-01-28 | 陈正盛 | Structure body, earphones using the structure body, and sound box using the structure body |
| CN109408023A (en) * | 2018-10-13 | 2019-03-01 | Oppo广东移动通信有限公司 | Screen vocal technique and device, control device, electronic equipment and storage medium |
-
2009
- 2009-07-27 CN CN200910108846A patent/CN101711003A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291647A (en) * | 2011-08-31 | 2011-12-21 | 汉得利（常州）电子有限公司 | Sound generation device capable of imitating engine sound |
| CN102523543A (en) * | 2011-11-29 | 2012-06-27 | 宁波东源音响器材有限公司 | Application of novel resin material for making sound box driver diaphragm |
| CN102523543B (en) * | 2011-11-29 | 2015-01-21 | 宁波东源音响器材有限公司 | Application of novel resin material for making sound box driver diaphragm |
| CN104113807A (en) * | 2014-06-20 | 2014-10-22 | 宁波兴隆电子有限公司 | Polar ring coverage membrane-contained ultra-thin microphone |
| CN104320733A (en) * | 2014-09-30 | 2015-01-28 | 陈正盛 | Structure body, earphones using the structure body, and sound box using the structure body |
| CN109408023A (en) * | 2018-10-13 | 2019-03-01 | Oppo广东移动通信有限公司 | Screen vocal technique and device, control device, electronic equipment and storage medium |
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Application publication date: 20100519 |