CN101600141B - Sound production device - Google Patents
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- CN101600141B CN101600141B CN200910139277.1A CN200910139277A CN101600141B CN 101600141 B CN101600141 B CN 101600141B CN 200910139277 A CN200910139277 A CN 200910139277A CN 101600141 B CN101600141 B CN 101600141B
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Abstract
The invention relates to a sound production device, which comprises a sound production element and a signal input device. The signal input device is used for outputting electric signals to the sound production element, wherein the sound production element comprises at least one layer of carbon nano-tube membrane which comprises a plurality of carbon nano-tubes connected end to end; and the sound production element is used for receiving the electric signals output by the signal input device and emitting corresponding sound wave. The sound production device can be used in devices capable of producing sound such as earphones, sound boxes, radios and the like.
Description
Technical field
The present invention relates to a kind of sound-producing device, particularly relate to a kind of sound-producing device based on carbon nano-tube.
Background technology
Sound-producing device is generally made up of signal input apparatus and sounding component.By signal input apparatus input electrical signal to sounding component, and then sound.Sounding component of the prior art is generally a loud speaker.This loud speaker is a kind of electro-acoustic element signal of telecommunication being converted to voice signal.Particularly, can to change the audio-frequency electric power signal in certain limit into distortion by transducing mode little and have the sub-audible sound of enough sound pressure levels for loud speaker.
The kind of existing loud speaker is a lot, according to its operation principle, is divided into: dynamic speaker, electromagnetic loudspeaker, electrostatic loudspeaker and piezo-electric loudspeaker.Although their working method is different, is generally and promotes ambient air by producing mechanical oscillation, make air dielectric produce fluctuation thus realize the conversion of " electricity-Li-sound ".Wherein, being most widely used of dynamic speaker.
Refer to Fig. 1, existing dynamic speaker 100 is made up of three parts usually: voice coil loudspeaker voice coil 102, magnet 104 and vibrating diaphragm 106.Voice coil loudspeaker voice coil 102 adopts electrical conductor usually, and when inputting a tone currents signal in voice coil loudspeaker voice coil 102, voice coil loudspeaker voice coil 102 is equivalent to a current－carrying conductor.Owing to being placed in the magnetic field of described magnet 104 generation, can be subject to Lorentz force according to current－carrying conductor in magnetic field, voice coil loudspeaker voice coil 102 can be subject to the power that a size is directly proportional to tone currents, direction changes with the change of tone currents direction.Therefore, produce vibration under the magnetic fields that voice coil loudspeaker voice coil 102 will produce at described magnet 104, and drive vibrating diaphragm 106 to vibrate, the air before and after vibrating diaphragm 106 also vibrates thereupon, converts the electrical signal to sound wave to surrounding radiation.But the structure of this dynamic speaker 100 is comparatively complicated, and it must work under the condition having magnetic.
Since the early 1990s, (Helical microtubules of graphiticcarbon is referred to carbon nano-tube, Nature, Sumio Iijima, vol 354, p56 (1991)) pay close attention to greatly for the nano material of representative causes people with the structures and characteristics of its uniqueness.In recent years, along with deepening continuously of carbon nano-tube and nano materials research, its wide application prospect constantly displayed.Such as, due to the performance such as electromagnetism, optics, mechanics, chemistry of the uniqueness that carbon nano-tube has, in a large number about its application study in fields such as field emitting electronic source, transducer, novel optical material, soft ferromagnetic materials is constantly in the news.But, but not yet find in prior art that carbon nano-tube is used for field of acoustics.
Summary of the invention
In view of this, necessaryly provide a kind of sound-producing device, this sound-producing device structure is simple, can work under without the condition of magnetic.
A kind of sound-producing device, it comprises: a sounding component; And a signal input apparatus, for exporting the signal of telecommunication to this sounding component; Wherein, described sounding component comprises at least one deck carbon nano-tube film, and this carbon nano-tube film comprises multiple end to end carbon nano-tube, and described sounding component sends corresponding sound wave for the signal of telecommunication receiving the output of described signal input apparatus.
A kind of sound-producing device, it comprises: a signal input apparatus; At least two electrodes, this at least two electrode gap is arranged; And a sounding component, this sounding component receives by described at least two electrodes the signal of telecommunication that described signal input apparatus exports; Wherein, this sounding component comprises at least one deck carbon nano-tube film, and this carbon nano-tube film comprises multiple end to end carbon nano-tube, and the signal of telecommunication that this carbon nano-tube film receives the output of described signal input apparatus by described at least two electrodes sends corresponding sound wave.
A kind of sound-producing device, it comprises: a sounding component; And a signal input apparatus, for exporting the signal of telecommunication to this sounding component; Wherein, described sounding component comprises at least one deck carbon nano-tube film, this carbon nano-tube film comprises multiple almost parallel carbon nano-tube, this carbon nano-tube forms this carbon nano-tube film by the effect of Van der Waals force, the bearing of trend of this carbon nano-tube is roughly parallel with the surface of this carbon nano-tube film, and described carbon nano-tube film sends corresponding sound wave for the signal of telecommunication receiving the output of described signal input apparatus.
Compared with prior art, described sound-producing device has the following advantages: one, because the sounding component in described sound-producing device comprises carbon nano-tube film, without the need to other labyrinths such as magnet, therefore the structure of this sound-producing device is comparatively simple, is conducive to the cost reducing this sound-producing device.Its two, this sound-producing device utilizes input signal to cause this sounding component variations in temperature, thus makes its surrounding medium undergoes rapid expansion and contraction, and then sends sound wave, without the need to vibrating diaphragm, and this sounding component composition sound-producing device can work under without the condition of magnetic.They are three years old, because carbon nano-tube film has less unit are thermal capacitance and larger specific area, and the carbon nano-tube in carbon nano-tube film joins end to end, after input signal, according to the change of signal strength signal intensity (as current strength), the sounding component be made up of at least one deck carbon nano-tube film can the medium of circumference equably, rapid heating and cooling, produce periodic variations in temperature, and carry out Rapid Thermal exchange with surrounding medium, make surrounding medium undergoes rapid expansion and contraction, send the appreciable sound of people's ear, i.e. thermic sounding, and the frequency range of the sound sent is wider, sounding effect is better.In addition, when the Thickness Ratio of this sounding component is less, this sounding component has higher transparency, therefore the sound-producing device formed is transparent sound production device, various display unit, the display surface of mobile phone display screen or the surface of oil painting can be directly installed on as joint space-efficient transparent sound production device.They are four years old, because carbon nano-tube has good mechanical strength and toughness, therefore the carbon nano-tube film be made up of end to end carbon nano-tube has good mechanical strength and toughness, durability is better, thus be conducive to preparing be made up of carbon nano-tube film various shapes, size sound-producing device, and then be conveniently used in various field.
Accompanying drawing explanation
Fig. 1 is the structural representation of loud speaker in prior art.
Fig. 2 is the structural representation of first embodiment of the invention sound-producing device.
Fig. 3 is the stereoscan photograph of carbon nano-tube film in first embodiment of the invention sound-producing device.
Fig. 4 is the structural representation of the carbon nano-tube fragment in the carbon nano-tube film in Fig. 3.
Fig. 5 is the frequency response characteristic of first embodiment of the invention sound-producing device.
Fig. 6 is the structural representation of second embodiment of the invention sound-producing device.
Embodiment
The sound-producing device of the embodiment of the present invention is described in detail below with reference to accompanying drawing.
Refer to Fig. 2, first embodiment of the invention provides a kind of sound-producing device 10, and this sound-producing device 10 comprises signal input apparatus 12, sounding component 14, one first electrode 142 and one second electrode 144.Described first electrode 142 and the second electrode 144 interval are arranged, and are electrically connected with described sounding component 14.In addition, described first electrode 142 and the second electrode 144 are electrically connected with described signal input apparatus 12, for being input in described sounding component 14 by the signal in described signal input apparatus 12.
Described sounding component 14 comprises at least one deck carbon nano-tube film.This carbon nano-tube film comprises multiple almost parallel carbon nano-tube, and this carbon nano-tube forms this carbon nano-tube film by the effect of Van der Waals force, and the bearing of trend of this carbon nano-tube is roughly parallel with the surface of this carbon nano-tube film.This carbon nano-tube film comprises multiple end to end carbon nano-tube.Even carbon nanotube distribution in carbon nano-tube film.Described carbon nano-tube substantially or is roughly in the same direction arranged of preferred orient in this carbon nano-tube film.Described carbon nano-tube film obtains by directly pulling from a carbon nano pipe array.Refer to Fig. 3 and Fig. 4, further, described carbon nano-tube film comprises multiple joining end to end and the carbon nano-tube fragment 143 aligned, and each carbon nano-tube fragment 143 has roughly equal length, and carbon nano-tube fragment 143 two ends are interconnected by Van der Waals force.This carbon nano-tube fragment 143 comprises the equal and carbon nano-tube 145 be arranged parallel to each other of multiple length.Above-mentioned directly pulling from a carbon nano pipe array and the carbon nano-tube film that obtains can further across volatile organic solvent process, the surface volume of the carbon nano-tube film after process is than reducing, and viscosity reduces, and its mechanical strength and toughness are enhanced.The thickness of described carbon nano-tube film can be 0.5 nanometer ~ 100 micron.The thickness of described sounding component 14 can be 0.5 nanometer ~ 1 millimeter.Further, described sounding component 14 comprises the carbon nano-tube film that at least two-layer laminate is arranged, and is combined closely between adjacent carbon nano-tube film by Van der Waals force.The number of plies of the carbon nano-tube film in this sounding component 14 is not limit, and has an intersecting angle α between the orientation of carbon nano-tube 145 in adjacent two layers carbon nano-tube film, and α is more than or equal to 0 degree and is less than or equal to 90 degree, specifically can prepare according to actual demand.When described sounding component 14 comprises multilayer carbon nanotube film, owing to being combined closely by Van der Waals force between adjacent two layers carbon nano-tube film, therefore described sounding component 14 has self supporting structure.Attracted each other by Van der Waals force between the multiple carbon nano-tube in so-called self supporting structure and described carbon nano tube structure, thus make sounding component 14 have specific shape.The unit are thermal capacitance of described sounding component 14 can be less than 2 × 10
-4joules per cm Kelvin.Preferably, the unit are thermal capacitance of described sounding component 14 is less than 1.7 × 10
-6joules per cm Kelvin.Carbon nano-tube 145 in described carbon nano-tube film can be in Single Walled Carbon Nanotube, double-walled carbon nano-tube and multi-walled carbon nano-tubes one or more.The diameter of described Single Walled Carbon Nanotube is 0.5 nanometer ~ 50 nanometer, and the diameter of described double-walled carbon nano-tube is 1.0 nanometer ~ 50 nanometers, and the diameter of described multi-walled carbon nano-tubes is 1.5 nanometer ~ 50 nanometers.Length and the width of the described sounding component 14 be made up of at least one deck carbon nano-tube film are not limit, and specifically can prepare according to the actual requirements.In the embodiment of the present invention, the length of described sounding component 14 is 3 centimetres, and width is 3 centimetres, and thickness is 50 nanometers.When the Thickness Ratio of this sounding component 14 is less, such as be less than 10 microns, this sounding component has higher transparency, therefore the sound-producing device 10 adopting this sounding component 14 is transparent sound production device 10, various display unit, the display surface of mobile phone display screen or the surface of oil painting can be directly installed on as joint space-efficient transparent sound production device 10.
Described first electrode 142 and the second electrode 144 are for realizing the electrical connection between described signal input apparatus 12 and described sounding component 14.Described sounding component 14 is electrically connected with described first electrode 142 and the second electrode 144 respectively, and is fixed by described first electrode 142 and the second electrode 144.Described first electrode 142 and the second electrode 144 can play the effect supporting described sounding component 14.Described first electrode 142 and the second electrode 144 are electrically connected with described signal input apparatus 12 further by an external wire 149, for being input in described sounding component 14 by the signal of described signal input apparatus 12.Described first electrode 142 and the second electrode 144 are formed by electric conducting material, and its concrete shape structure is not limit, and can be one dimension, two dimension or three-dimensional structure.Particularly, described first electrode 142 and the second electrode 144 may be selected to be stratiform, bar-shaped, block or other shape.The material of described first electrode 142 and the second electrode 144 may be selected to be metal, conducting resinl, metallic carbon nanotubes, indium tin oxide (ITO) etc.Because described sounding component 14 has self supporting structure, described first electrode 142 and the second electrode 144 also space set are fixed on described sounding component 14 two ends or surface, and carbon nano-tube extends along the direction of described first electrode 142 to the second electrode 144 at least partly.In the embodiment of the present invention, described first electrode 142 and the second electrode 144 are bar-shaped metal electrode, described first electrode 142 and the second electrode 144 interval arrange and are fixed on described sounding component 14 two ends, and the carbon nano-tube in described sounding component 14 can extend along the direction of described first electrode 142 to the second electrode 144 substantially.Because described first electrode 142 and the second electrode 144 interval are arranged, certain resistance can be accessed when described sounding component 14 is applied to sound-producing device 10 and avoid short circuit phenomenon to produce.Because carbon nano-tube has great specific area, under the effect of Van der Waals force, this carbon nano-tube film itself has good adhesiveness, therefore when adopting this at least one deck carbon nano-tube film makes sounding component 14, described first electrode 142 and can being directly adhered fixed between the second electrode 144 and described sounding component 14, and form good electrical contact.
In addition, described first electrode 142 and can further include a conductive adhesion layer (not shown) between the second electrode 144 and described sounding component 14.Described conductive adhesion layer can be arranged at the surface of described sounding component 14.Described conductive adhesion layer, while realizing the first electrode 142 and the second electrode 144 and the electrical contact of described sounding component 14, can also make described first electrode 142 and the second electrode 144 fix better with described sounding component 14.In the present embodiment, described conductive adhesion layer is one deck elargol.
Be appreciated that when described sounding component 14 has self supporting structure, described first electrode 142 and the second electrode 144 are selectable structure.Described signal input apparatus 12 can be directly electrically connected with described sounding component 14 by the mode such as wire or contact conductor.In addition, any mode realizing being electrically connected between described signal input apparatus 12 with described sounding component 14 is all within protection scope of the present invention.
The signal that described signal input apparatus 12 inputs comprises ac signal or audio electrical signal etc.Described signal input apparatus 12 is electrically connected with described first electrode 142 and the second electrode 144 by wire 149, and is input in sounding component 14 by signal by described first electrode 142 and the second electrode 144.
Above-mentioned sound-producing device 10 in use, because carbon nano-tube film has less thermal capacitance and larger specific area, and the carbon nano-tube in carbon nano-tube film joins end to end, be uniformly distributed, by the sounding component 14 that at least one deck carbon nano-tube film forms, there is less unit are thermal capacitance, after input signal, according to the change of signal strength signal intensity (as current strength), described sounding component 14 can heats surrounding media equably, rapid heating and cooling, produce periodic variations in temperature, and carry out Rapid Thermal exchange with surrounding medium, make surrounding medium undergoes rapid expansion and contraction, send the appreciable sound of people's ear, and the frequency range of the sound sent is wider, sounding effect is better.Therefore in the embodiment of the present invention, the principle of sound of described sounding component 14 is the conversion of " electricity-Re-sound ", is with a wide range of applications.
The audible frequency scope of described sound-producing device 10 is 1 hertz to 100,000 hertz (i.e. 1Hz ~ 100kHz).Fig. 5 be adopt length and width be 30 millimeters and carbon nano-tube join end to end and the carbon nano-tube film be arranged of preferred orient in the same direction be used as described sounding component 14, when input voltage is 50 volts, the frequency response characteristic of the described sound-producing device 10 recorded when a microphone being placed on the position apart from sounding component 5 centimetres.As can be seen from Figure 5, the sound pressure level of described sound-producing device is greater than 50 decibels, even can reach 105 decibels, audible frequency scope is 100 hertz to 100,000 hertz (i.e. 100Hz ~ 100kHz), and the distortion factor of described sound-producing device in 500 hertz ~ 40,000 frequency range is less than 3%, described sound-producing device 10 has good sounding effect.In addition, carbon nano-tube film in the embodiment of the present invention has good toughness and mechanical strength, therefore the sound-producing device of various shape and size can be made up easily of the sounding component 14 that at least one deck carbon nano-tube film forms, this sound-producing device can be conveniently used in various can in the product of sounding, as in the electronic applications such as sound equipment, mobile phone, MP3, MP4, TV, computer and other products.
Refer to Fig. 6, second embodiment of the invention provides a kind of sound-producing device 20, and this sound-producing device 20 comprises signal input apparatus 22, sounding component 24,1 first electrode 242,1 second electrode 244, third electrode 246 and one the 4th electrode 248.
Sound-producing device 20 in second embodiment of the invention is substantially identical with the structure of the sound-producing device 10 in the first embodiment, difference is, sound-producing device 20 in second embodiment of the invention comprises four electrodes, i.e. the first electrode 242, second electrode 244, third electrode 246 and the 4th electrode 248.Described first electrode 242, second electrode 244, third electrode 246 and the 4th electrode 248 are bar-shaped metal electrode, and parallel interval is arranged at least two planes.Described sounding component 24 arranges around described first electrode 242, second electrode 244, third electrode 246 and the 4th electrode 248 and is electrically connected respectively with described first electrode 242, second electrode 244, third electrode 246 and the 4th electrode 248, forms an annular sounding component 24.Any two adjacent electrodes are electrically connected with the two ends of described signal input apparatus 22 respectively, access input signal to make the sounding component 24 between adjacent electrode.Particularly, be electrically connected with one end of described signal input apparatus 22 after first being connected with a wire 249 by non-conterminous two electrodes, two remaining electrodes are electrically connected with the other end of described signal input apparatus 22 after connecting with wire 249.In the embodiment of the present invention, be electrically connected with one end of described signal input apparatus 22 after first described first electrode 242 can being connected with wire 249 with third electrode 246, then be electrically connected with the other end of described signal input apparatus 22 after the second electrode 244 is connected with wire 249 with the 4th electrode 248.Above-mentioned connected mode can realize the parallel connection of the sounding component 24 between adjacent electrode.Sounding component 24 after parallel connection has less resistance, can reduce operating voltage.And above-mentioned connected mode can make described sounding component 24 to all directions homogeneous radiation, and intensity of phonation is enhanced, and can realize around sounding effect.In addition, when the area of described sounding component 24 is larger, described third electrode 246 and the 4th electrode 248 also can play the effect supporting described sounding component 24 further.
Be appreciated that described first electrode 242, second electrode 244, third electrode 246 and the 4th electrode 248 also can be arranged in same plane with described sounding component 24.The connected mode of the described each electrode be arranged in same plane and the connected mode of above-mentioned electrode same or similar.
Be appreciated that the present invention can arrange multiple electrode, its quantity is not limit, and only need guarantee that any two adjacent electrodes are electrically connected with the two ends of described signal input apparatus 22 respectively.
Compared with prior art, the sound-producing device that the embodiment of the present invention provides has the following advantages: one, because the sounding component in described sound-producing device comprises carbon nano-tube film, without the need to other labyrinths such as magnet, therefore the structure of this sound-producing device is comparatively simple, is conducive to the cost reducing this sound-producing device.Its two, this sound-producing device utilizes input signal to cause this sounding component variations in temperature, thus makes its surrounding medium undergoes rapid expansion and contraction, and then sends sound wave, without the need to vibrating diaphragm, and therefore this sounding component composition sound-producing device can work under without the condition of magnetic.They are three years old, because carbon nano-tube film has less unit are thermal capacitance and large specific area, and the carbon nano-tube in carbon nano-tube film join end to end and be arranged of preferred orient and the orientation of part carbon nano-tube along extending from the direction of described first electrode to the second electrode, after input signal, according to the change of signal strength signal intensity (as current strength), the sounding component be made up of at least one deck carbon nano-tube film can the medium of circumference equably, rapid heating and cooling, produce periodic variations in temperature, and carry out Rapid Thermal exchange with surrounding medium, make surrounding medium undergoes rapid expansion and contraction, send the appreciable sound of people's ear, and the frequency range of the sound sent is wider, sounding effect is better.In addition, when the Thickness Ratio of this sounding component is less, this sounding component has higher transparency, therefore the sound-producing device formed is transparent sound production device, various display unit, the display surface of mobile phone display screen or the surface of oil painting can be directly installed on as joint space-efficient transparent sound production device.They are four years old, because carbon nano-tube has good mechanical strength and toughness, then by least two-layer carbon nano-tube film be made up of the carbon nano-tube be arranged of preferred orient, there is good mechanical strength and toughness, durability is better, thus be conducive to preparing be made up of carbon nano-tube film various shapes, size sound-producing device, and then be conveniently used in various field.They are five years old, because carbon nano-tube film obtains for pulling from a direct carbon nano pipe array, it has great specific area, under the effect of Van der Waals force, described carbon nano-tube film has good viscosity, thus is conducive to preparing large-area sounding component and sound-producing device.
In addition, those skilled in the art also can do other changes in spirit of the present invention, and certainly, these changes done according to the present invention's spirit, all should be included within the present invention's scope required for protection.
Claims (21)
1. a sound-producing device, it comprises:
One sounding component; And
One signal input apparatus, for exporting the signal of telecommunication to this sounding component;
It is characterized in that: described sounding component comprises at least one deck carbon nano-tube film, this carbon nano-tube film comprises multiple end to end carbon nano-tube, the bearing of trend of this carbon nano-tube is roughly parallel with the surface of this carbon nano-tube film, the signal of telecommunication that described sounding component exports for receiving described signal input apparatus, heats surrounding media also sends corresponding sound wave to surrounding medium generation heat exchange.
2. sound-producing device as claimed in claim 1, it is characterized in that, the unit are thermal capacitance of described sounding component is less than 2 × 10
-4joules per cm Kelvin.
3. sound-producing device as claimed in claim 1, it is characterized in that, the unit are thermal capacitance of described sounding component is less than 1.7 × 10
-6joules per cm Kelvin.
4. sound-producing device as claimed in claim 1, it is characterized in that, the audible frequency of described sound-producing device is 1 hertz ~ 100,000 hertz.
5. sound-producing device as claimed in claim 4, it is characterized in that, the distortion factor of described sound-producing device in 500 hertz ~ 40,000 frequency range is less than 3%.
6. sound-producing device as claimed in claim 1, it is characterized in that, the sound pressure level of described sound-producing device is greater than 50 decibels.
7. sound-producing device as claimed in claim 1, it is characterized in that, the thickness of described sounding component is 0.5 nanometer ~ 1 millimeter.
8. sound-producing device as claimed in claim 1, it is characterized in that, described carbon nano-tube is arranged of preferred orient substantially in the same direction in carbon nano-tube film.
9. sound-producing device as claimed in claim 1, it is characterized in that, described carbon nano-tube film comprises multiple end to end carbon nano-tube fragment further, each carbon nano-tube fragment has roughly equal length and each carbon nano-tube fragment is made up of multiple carbon nano-tube be parallel to each other, and carbon nano-tube fragment two ends are interconnected by Van der Waals force.
10. sound-producing device as claimed in claim 1, it is characterized in that, carbon nano-tube in described carbon nano-tube film is one or more in Single Walled Carbon Nanotube, double-walled carbon nano-tube and multi-walled carbon nano-tubes, the diameter of described Single Walled Carbon Nanotube is 0.5 nanometer ~ 50 nanometer, the diameter of described double-walled carbon nano-tube is 1.0 nanometer ~ 50 nanometers, and the diameter of described multi-walled carbon nano-tubes is 1.5 nanometer ~ 50 nanometers.
11. sound-producing devices as claimed in claim 1, is characterized in that, described sounding component comprises the carbon nano-tube film that at least two-layer laminate is arranged, and is combined closely by Van der Waals force between adjacent two layers carbon nano-tube film.
12. sound-producing devices as claimed in claim 1, it is characterized in that, described sound-producing device comprises at least two electrodes further, and this at least two electrode gap arranges and is electrically connected with described sounding component.
13. sound-producing devices as claimed in claim 12, it is characterized in that, described sound-producing device comprises two electrodes, and in described sounding component, at least part of carbon nano-tube extends along one of them electrode to the direction of another electrode.
14. sound-producing devices as claimed in claim 12, it is characterized in that, described at least two electrodes are electrically connected further by the two ends of wire with described signal input apparatus.
15. sound-producing devices as claimed in claim 1, it is characterized in that, described sound-producing device comprises multiple electrode, and the plurality of electrode gap arranges and is all electrically connected with described sounding component, and in the plurality of electrode, any two adjacent electrodes are electrically connected with the two ends of described signal input apparatus respectively.
16. sound-producing devices as claimed in claim 12, it is characterized in that, described at least two electrodes are one dimension, two dimension or three-dimensional structure.
17. sound-producing devices as claimed in claim 12, is characterized in that, the material of described electrode is metal, conducting resinl, metallic carbon nanotubes or indium tin oxide.
18. sound-producing devices as claimed in claim 12, is characterized in that, described sound-producing device comprise further a conductive adhesion layer be arranged on described between at least two electrodes and sounding component.
19. sound-producing devices as claimed in claim 1, is characterized in that, the signal of described signal input apparatus input comprises ac signal or audio electrical signal.
20. 1 kinds of sound-producing devices, it comprises:
One signal input apparatus;
At least two electrodes, this at least two electrode gap is arranged; And
One sounding component, this sounding component receives the signal of telecommunication of described signal input apparatus output by described at least two electrodes;
It is characterized in that, this sounding component comprises at least one deck carbon nano-tube film, this carbon nano-tube film comprises multiple end to end carbon nano-tube, the bearing of trend of this carbon nano-tube is roughly parallel with the surface of this carbon nano-tube film, this carbon nano-tube film receives by described at least two electrodes the signal of telecommunication that described signal input apparatus exports, and heats surrounding media also sends corresponding sound wave to surrounding medium generation heat exchange.
21. 1 kinds of sound-producing devices, it comprises:
One sounding component; And
One signal input apparatus, for exporting the signal of telecommunication to this sounding component;
It is characterized in that: described sounding component comprises at least one deck carbon nano-tube film, this carbon nano-tube film comprises multiple almost parallel carbon nano-tube, this carbon nano-tube forms this carbon nano-tube film by the effect of Van der Waals force, the bearing of trend of this carbon nano-tube is roughly parallel with the surface of this carbon nano-tube film, the signal of telecommunication that described carbon nano-tube film exports for receiving described signal input apparatus, heats surrounding media also sends corresponding sound wave to surrounding medium generation heat exchange.
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| CN200910139277.1A CN101600141B (en) | 2008-06-04 | 2009-04-22 | Sound production device |
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| CN200910139277.1A CN101600141B (en) | 2008-06-04 | 2009-04-22 | Sound production device |
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| EP2138998B1 (en) * | 2008-06-04 | 2019-11-06 | Tsing Hua University | Thermoacoustic device comprising a carbon nanotube structure |
| CN101610444B (en) * | 2008-06-18 | 2013-01-09 | 清华大学 | Sounding device |
| CN102769814B (en) * | 2008-12-05 | 2015-07-01 | 清华大学 | Sounding device |
| CN106131761B (en) * | 2010-05-10 | 2020-12-29 | 北京富纳特创新科技有限公司 | Thermoacoustic device |
| CN109195087B (en) * | 2018-10-12 | 2020-04-24 | 大连理工大学 | Multilayer carbon nanotube film stack speaker based on thermoacoustic effect |
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| CN101594563A (en) * | 2008-04-28 | 2009-12-02 | 北京富纳特创新科技有限公司 | sound-producing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101594563A (en) * | 2008-04-28 | 2009-12-02 | 北京富纳特创新科技有限公司 | sound-producing device |
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| JP2011083020A (en) | 2011-04-21 |
| JP5270646B2 (en) | 2013-08-21 |
| JP2009296593A (en) | 2009-12-17 |
| JP4672787B2 (en) | 2011-04-20 |
| CN101600141A (en) | 2009-12-09 |
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