CN101610442B - Sound device - Google Patents

Abstract

The present invention relates to a sounding device, which includes: a signal input device; and a sounding element, the sounding element is electrically connected to both ends of the signal inputting device; wherein, the sounding element is at least partly arranged on a support structure surface , the sounding element includes at least one layer of carbon nanotube film, the carbon nanotube film includes a plurality of carbon nanotubes parallel to each other, the signal input device inputs an electrical signal to the sounding element, and the surrounding gas medium is heated by the sounding element to emit sound waves. The sound generating device can be used in devices capable of generating sound such as earphones, speakers, and radios.

Description

Sound device

technical field

The invention relates to a sounding device, in particular to a sounding device based on carbon nanotubes.

Background technique

The sounding device generally consists of a signal input device and a sounding element. The electrical signal is input to the sound generating element through the signal input device, and then the sound is emitted. The sound emitting element in the prior art is generally a loudspeaker. The loudspeaker is an electro-acoustic device that converts electrical signals into sound signals. Specifically, the speaker can convert audio electric power signals within a certain range into audible sounds with less distortion and sufficient sound pressure level.

There are many kinds of existing loudspeakers, which can be divided into electrodynamic loudspeakers, electromagnetic loudspeakers, electrostatic loudspeakers and piezoelectric loudspeakers according to their working principles. Although they work in different ways, they generally push the surrounding air by generating mechanical vibrations, causing the air medium to fluctuate so as to realize the conversion of "electricity-force-acoustic". Among them, the dynamic speaker is the most widely used.

Please refer to FIG. 1 , the conventional dynamic speaker 100 generally consists of three parts: a voice coil 102 , a magnet 104 and a diaphragm 106 . The voice coil 102 usually adopts a current-carrying conductor, and when an audio current signal is input into the voice coil 102, the voice coil 102 is equivalent to a current-carrying conductor. Because it is placed in the magnetic field generated by the magnet 104, the current-carrying conductor will be subjected to the Lorentz force in the magnetic field, so that the voice coil 102 will be subjected to a force whose magnitude is proportional to the audio current and whose direction changes with the direction of the audio current. The power of change. In this way, the voice coil 102 will vibrate under the action of the magnetic field generated by the magnet 104, and drive the diaphragm 106 to vibrate, and the air around the diaphragm 106 will also vibrate accordingly, converting electrical signals into sound waves to radiate around. However, the structure of the dynamic speaker 100 is relatively complicated, and it must work under the condition of magnetism.

Since the early 1990s, nanomaterials represented by carbon nanotubes (see Helical microtubules of graphiticcarbon, Nature, Sumio Iijima, vol 354, p56 (1991)) have attracted great attention for their unique structures and properties. focus on. In recent years, with the continuous deepening of research on carbon nanotubes and nanomaterials, their broad application prospects continue to emerge. For example, due to the unique electromagnetic, optical, mechanical, and chemical properties of carbon nanotubes, a large number of applications in the fields of field emission electron sources, sensors, new optical materials, and soft ferromagnetic materials have been continuously reported. However, carbon nanotubes have not been found to be used in the acoustic field in the prior art.

Therefore, it is really necessary to provide a sounding device, which has a simple structure and can work under non-magnetic conditions.

Contents of the invention

A sounding device, which includes: a signal input device; and a sounding element, the sounding element is electrically connected to both ends of the signal inputting device; wherein, the sounding element is at least partly arranged on a support structure surface, and the sounding element The element includes at least one layer of carbon nanotube film, and the carbon nanotube film includes a plurality of carbon nanotubes parallel to each other. The signal input device inputs electric signals to the sounding element, and the surrounding gas medium is heated by the sounding element to emit sound waves.

The sounding device provided by the technical solution has the following advantages: one, because the sounding element in the sounding device only includes carbon nanotube film, without other complex structures such as magnets, so the structure of the sounding device is relatively simple, which helps to reduce the The cost of the sound generating device. Second, the sounding device uses the input signal to cause the temperature of the sounding element to change, so that the gas medium around it expands and contracts rapidly, and then emits sound waves without a diaphragm, and the sounding device composed of the sounding element can operate under non-magnetic conditions. Work. Third, because the carbon nanotube film has a small heat capacity and a large specific surface area, and the carbon nanotubes in the carbon nanotube film are parallel to each other and evenly distributed, and the two ends of some carbon nanotubes are connected to the signal input device respectively. After the input signal, according to the change of signal intensity (such as current intensity), the sound-generating element composed of at least one layer of carbon nanotube film can make full use of the characteristics of carbon nanotubes, such as excellent axial conductivity, Thermal conductivity, heat the surrounding gas medium evenly, rapidly rise and fall in temperature, produce periodic temperature changes, and conduct rapid heat exchange with the surrounding gas medium, so that the surrounding gas medium expands and contracts rapidly, and emits a sound that can be perceived by the human ear, and The frequency range of the emitted sound is wide (1 Hz-100 kHz), the sound effect is better, and the response speed of the sound generating device is faster and the sensitivity is higher. In addition, when the thickness of the sounding element is relatively small, such as less than 10 microns, the sounding element has high transparency, so the formed sounding device is a transparent sounding device, which can be directly installed on the display surface of various display devices and mobile phone display screens Or the surface of an oil painting display device, oil painting, etc. as a space-saving transparent sounding device. Fourth, because carbon nanotubes have good mechanical strength and toughness, at least one layer of carbon nanotube film composed of carbon nanotubes parallel to each other has good mechanical strength and toughness, and good durability, which is beneficial to Sound generating devices of various shapes and sizes composed of carbon nanotube films are prepared, and then conveniently applied in various fields. Fifthly, since the sound emitting element is at least partly arranged on the surface of the support structure, the sound emitting element can withstand high-intensity signal input, thereby enhancing the sound emitting effect of the sound emitting device.

Description of drawings

Fig. 1 is a schematic structural diagram of a loudspeaker in the prior art.

Fig. 2 is a schematic structural diagram of the sound generating device according to the first embodiment of the technical solution.

Fig. 3 is a scanning electron micrograph of the carbon nanotube thin film in the sound generating device of the first embodiment of the technical solution.

Fig. 4 is a schematic structural diagram of a sound generating device according to a second embodiment of the technical solution.

Fig. 5 is a schematic structural diagram of a sound generating device according to a third embodiment of the technical solution.

Detailed ways

The sound generating device of the embodiment of the technical solution will be described in detail below with reference to the accompanying drawings.

Please refer to FIG. 2, the first embodiment of the technical solution provides a sounding device 10, the sounding device 10 includes a signal input device 12, a sounding element 14, a supporting structure 16, a first electrode 142 and a second electrode 144. The sound emitting element 14 is disposed on the surface of the supporting structure 16 . The first electrode 142 and the second electrode 144 are arranged at two ends or the surface of the sound emitting element 14 at intervals, and are electrically connected with the sound emitting element 14 . The first electrode 142 and the second electrode 144 are electrically connected to both ends of the signal input device 12 through external wires 149 for inputting electrical signals from the signal input device 12 into the sound emitting element 14 .

The supporting structure 16 mainly plays a supporting role, and its shape is not limited. Any object with a definite shape, such as a wall or a desktop, can be used as the supporting structure 16 in the first embodiment of the technical solution. Specifically, the support structure 16 can be a planar structure or a curved structure, and has a surface. At this time, the sound-generating element 14 is directly arranged and adhered to the surface of the supporting structure 16 . Since the sound emitting element 14 is entirely supported by the support structure 16, the sound emitting element 14 can withstand high-strength signal input, thus having a high sound emission intensity.

The material of the support structure 16 is not limited, it can be a hard material such as diamond, glass or quartz. In addition, the supporting structure 16 can also be a flexible material, such as plastic or resin. Preferably, the material of the supporting structure 16 should have good thermal insulation performance, so as to prevent the heat generated by the sound-generating element 14 from being excessively absorbed by the supporting structure 16 , which fails to achieve the purpose of heating the surrounding gas medium to generate sound. In addition, the support structure 16 should have a relatively rough surface, so that the sound-generating element 14 arranged on the surface of the support structure 16 can have a larger contact area with air or other external media, and then the described sound can be improved to a certain extent. The sound effect of the sound generating device 10.

The sound emitting element 14 includes at least one layer of carbon nanotube film. Please refer to FIG. 3 , the carbon nanotube film includes a plurality of carbon nanotubes parallel to each other and arranged side by side. Two adjacent carbon nanotubes are closely combined by van der Waals force. The distance between two adjacent carbon nanotubes in the carbon nanotube film is less than 50 microns. The length of the carbon nanotube film is the length of a single carbon nanotube in the carbon nanotube film. The width of the carbon nanotube film is not limited. The carbon nanotube film has a thickness of 0.5 nanometers to 100 microns. The length of the carbon nanotube film is 1 micrometer to 30 millimeters. Further, the sound emitting element 14 includes at least two overlapping carbon nanotube films, the two adjacent layers of carbon nanotube films are tightly bonded by van der Waals force, and the carbon nanotubes in the adjacent two layers of carbon nanotube films There is an intersection angle α between them, and α is greater than or equal to 0 degrees and less than or equal to 90 degrees, which can be prepared according to actual needs. When the angle α between the carbon nanotubes in two adjacent layers of carbon nanotube films is greater than 0 degrees, the multiple carbon nanotubes in the sound emitting element 14 form a network structure, and the network structure includes multiple uniformly distributed micropores with a pore size of less than 50 microns. When the sounding element 14 includes multiple layers of carbon nanotube films, the sounding element 14 itself has good self-supporting performance because two adjacent layers of carbon nanotube films are closely bonded by van der Waals force. The carbon nanotubes in the carbon nanotube film can be one or more of single-wall carbon nanotubes, double-wall carbon nanotubes and multi-wall carbon nanotubes. The single-walled carbon nanotubes have a diameter of 0.5 nm to 50 nm, the double-walled carbon nanotubes have a diameter of 1.0 nm to 50 nm, and the multi-walled carbon nanotubes have a diameter of 1.5 nm to 50 nm. The sound emitting element 14 has a thickness of 0.5 nanometers to 1 millimeter. When the thickness of the sounding element 14 is relatively small, such as less than 10 microns, the sounding element 14 has higher transparency, so the sounding device 10 adopting the sounding element 14 is a transparent sounding device 10, which can be directly installed in various display devices, The display surface of the display screen of the mobile phone or the surface of the oil painting is used as the space-saving transparent sounding device 10 .

In the embodiment of the technical solution, the sound emitting element 14 includes two layers of carbon nanotube films, and the carbon nanotubes are arranged in the same direction in the two layers of carbon nanotube films. The sound emitting element 14 has a length of 3 cm, a width of 3 cm, and a thickness of 50 nm.

Since carbon nanotubes have a large specific surface area, under the action of van der Waals force, the carbon nanotube film itself has good adhesion, so when the at least one layer of carbon nanotube film is used as the sounding element 14, the The sound emitting element 14 and the supporting structure 16 can be directly adhered and fixed. Further, a bonding layer (not shown) may be further included between the sound emitting element 14 and the supporting structure 16 . The adhesive layer can be disposed on the surface of the sound emitting element 14 . The adhesive layer can better fix the sound emitting element 14 to the surface of the supporting structure 16 . The material of the adhesive layer can be an insulating material, or a material with certain conductivity. In this embodiment, the bonding layer is a layer of silver glue.

The first electrode 142 and the second electrode 144 are formed of conductive materials, and their specific shapes and structures are not limited. Specifically, the first electrode 142 and the second electrode 144 may be selected to be in a layer shape, a rod shape, a block shape or other shapes. The materials of the first electrode 142 and the second electrode 144 can be selected from metal, conductive glue, metallic carbon nanotubes, indium tin oxide (ITO) and the like. The first electrode 142 and the second electrode 144 are used to realize the electrical connection between the signal input device 12 and the sound emitting element 14 . The first electrode 142 and the second electrode 144 are electrically connected to the sound emitting element 14 respectively. Since the sound emitting element 14 is arranged on the surface of the support structure 16 , the first electrode 142 and the second electrode 144 may also be arranged at intervals and fixed on both ends or the surface of the sound emitting element 14 . The setting of the first electrode 142 and the second electrode 144 is related to the arrangement direction of the carbon nanotubes in the sound emitting element 14, at least two ends of the carbon nanotubes are connected to the first electrode 142 and the second electrode 144 respectively. electrical connection. In the embodiment of the technical solution, the first electrode 142 and the second electrode 144 are rod-shaped metal electrodes, and the first electrode 142 and the second electrode 144 are fixed at both ends of the sound emitting element 14 at intervals, and the sound emitting Both ends of all the carbon nanotubes in the element are electrically connected to the first electrode 142 and the second electrode 144 respectively. Since the first electrode 142 and the second electrode 144 are arranged at intervals, when the sound-generating element 14 is applied to the sound-generating device 10 , a certain resistance value can be connected to avoid short-circuit phenomenon. Since carbon nanotubes have a large specific surface area, under the action of van der Waals force, the carbon nanotube film itself has good adhesion, so when the at least one layer of carbon nanotube film is used as the sounding element 14, the The first electrode 142 and the second electrode 144 can be directly adhered and fixed to the sound-generating element 14 to form a good electrical contact.

Further, a conductive adhesive layer (not shown) may be further included between the first electrode 142 and the second electrode 144 and the sound emitting element 14 . The conductive adhesive layer can be disposed on the surface of the sound emitting element 14 . The conductive adhesive layer can better fix the first electrode 142 and the second electrode 144 to the sound emitting element 14 while realizing the electrical contact between the first electrode 142 and the second electrode 144 and the sound emitting element 14. on the surface of element 14. In this embodiment, the conductive bonding layer is a layer of silver glue.

It can be understood that in the first embodiment of the technical solution, a plurality of electrodes can be further arranged on the surface of the sound emitting element 14, and the number is not limited, as long as it is ensured that any two adjacent electrodes are arranged at intervals and electrically connected to the sound emitting element 14. connected, and both ends of the signal input device 12 are electrically connected to each other.

It can be understood that since the sound emitting element 14 is disposed on the surface of the support structure 16 , the first electrode 142 and the second electrode 144 are optional structures. The signal input device 12 can be directly electrically connected to the sound emitting element 14 through wires 149 or electrode leads. It is only necessary to ensure that the signal input device 12 can input electrical signals to the sound emitting element 14 . Any manner that can realize the electrical connection between the signal input device 12 and the sound emitting element 14 is within the protection scope of the technical solution.

The signal input by the signal input device 12 includes an AC signal or an audio signal. The signal input device 12 is electrically connected to the first electrode 142 and the second electrode 144 through a wire 149 , and inputs a signal into the sound emitting element 14 through the first electrode 142 and the second electrode 144 .

When the above-mentioned sounding device 10 is in use, since the carbon nanotube film has a small heat capacity and a large specific surface area, and the carbon nanotubes in the carbon nanotube film are parallel to each other and evenly distributed, and the two ends of some carbon nanotubes are respectively connected to the The two ends of the signal input device 12 are electrically connected, after the input signal, according to the change of the signal intensity (such as the current intensity), the sounding element 14 made up of at least one layer of carbon nanotube film can make full use of the characteristics of the carbon nanotube, Such as excellent axial electrical conductivity and thermal conductivity, uniform heating of the surrounding gas medium, rapid temperature rise and fall, and periodic temperature changes, and rapid heat exchange with the surrounding gas medium, so that the surrounding gas medium rapidly expands and contracts, emitting human The sound can be perceived by the ear, and the frequency range of the emitted sound is wider, the sound effect is better, and the response speed of the sound generating device 10 is faster and the sensitivity is higher. The sounding frequency range of the sounding device 10 provided by the embodiment of the technical solution is 1 Hz to 100,000 Hz (ie, 1 Hz to 100 kHz). Therefore, in the embodiment of the technical solution, the sounding principle of the sounding element 14 is "electrical-thermal-acoustic" conversion, which has a wide range of applications. In addition, since the sound-generating element 10 in the embodiment of the technical solution can be composed of multilayer carbon nanotube films, and the carbon nanotubes in the multilayer carbon nanotube films can be arranged in different directions, the multiple carbon nanotube films The formed sounding element 14 has good toughness and mechanical strength, and the sounding element 14 can be easily made into sounding devices 10 of various shapes and sizes, and the sounding device 10 can be easily applied to various sounding devices , Such as audio, mobile phone, MP3, MP4, TV, computer and other electronic fields and other sound devices.

Please refer to FIG. 4 , the second embodiment of the technical solution provides a sounding device 20, which includes a signal input device 22, a sounding element 24, a supporting structure 26, a first electrode 242, and a second electrode 244 , a third electrode 246 and a fourth electrode 248 .

The structure of the sounding device 20 in the second embodiment of the technical solution is basically the same as that of the sounding device 10 in the first embodiment, the difference is that the sounding element 24 in the second embodiment of the technical solution is arranged around the support structure 26, A ring-shaped sound emitting element 24 is formed. The shape of the supporting structure 26 is not limited, and can be any three-dimensional structure. Preferably, the supporting structure 26 is a cube, a cone or a cylinder. In the embodiment of the technical solution, the support structure 26 is a cylinder. The first electrode 242 , the second electrode 244 , the third electrode 246 and the fourth electrode 248 are spaced apart on the surface of the sound emitting element 24 and are electrically connected to the sound emitting element 24 . Any two adjacent electrodes are respectively electrically connected to both ends of the signal input device 22, so that the sound emitting element 24 located between the adjacent electrodes receives input signals. Specifically, two non-adjacent electrodes are connected with one end of the signal input device 22 after being connected with a wire 249, and the remaining two electrodes are connected with the other end of the signal input device 22 after being connected with a wire 249. electrical connection. In the embodiment of this technical solution, the first electrode 242 and the third electrode 246 can be connected with a wire 249 first and then electrically connected to one end of the signal input device 22, and then the second electrode 244 and the fourth electrode 248 is electrically connected with the other end of the signal input device 22 after being connected with a wire 249 . The above connection method can realize the parallel connection of the carbon nanotube films between adjacent electrodes. The carbon nanotube films connected in parallel have smaller resistance, which can reduce the working voltage. Moreover, the above connection method can make the sound emitting element 24 have a larger radiation area, and the sound emission intensity is enhanced, so as to realize the surround sound effect.

It can be understood that this technical solution can be provided with a plurality of electrodes, the number of which is not limited, it only needs to ensure that any two adjacent electrodes are spaced apart, electrically connected to the sound emitting element 24, and are respectively connected to the signal input device 22. The two ends of the electrical connection can be.

Please refer to FIG. 5 , the third embodiment of the technical solution provides a sounding device 30, which includes a signal input device 32, a sounding element 34, a support structure 36, a first electrode 342, and a second electrode 344.

The structure of the sounding device 30 in the third embodiment of the technical solution is basically the same as that of the sounding device 10 in the first embodiment, the difference is that the sounding element 34 in the third embodiment of the technical solution is partially arranged on the supporting structure 36 surface, so as to form a sound-absorbing space between the surface of the sound-generating element 34 and the support structure 36 . The formed sound collecting space can be a closed space or an open space. The supporting structure 36 is a V-shaped or U-shaped structure or a cavity with a narrow opening. When the supporting structure 36 is a cavity with a narrow opening, the sound emitting element 34 can be flatly and fixedly arranged on the opening of the cavity, thereby forming a Helmholtz resonance cavity. The supporting structure 36 is made of wood, plastic, metal or glass. In the embodiment of the technical solution, the support structure 36 is a V-shaped structure. The sound emitting element 34 is arranged at both ends of the V-shaped structure, that is, extending from one end of the V-shaped structure to the other end, so that the sound emitting element 34 is partially suspended, so that the surface of the sound emitting element 34 reaches the support structure 36 A sound space is formed between them. The first electrode 342 and the second electrode 344 are spaced apart on the surface of the sound emitting element 34 . The first electrode 342 and the second electrode 344 are electrically connected to both ends of the signal input device 32 after being connected to a wire 349 . The V-shaped support structure 36 can reflect the sound wave of the sound emitting element 34 located on one side of the support structure 36 to enhance the sound emitting effect of the sound emitting device 30 .

The sounding device provided by the embodiment of the technical solution has the following advantages: First, because the sounding element in the sounding device only includes a carbon nanotube film and does not need other complex structures such as magnets, the structure of the sounding device is relatively simple, which is beneficial to The cost of the sound generating device is reduced. Second, the sounding device uses the input signal to cause the temperature of the sounding element to change, so that the gas medium around it expands and contracts rapidly, and then emits sound waves without a diaphragm, and the sounding device composed of the sounding element can operate under non-magnetic conditions. Work. Third, because the carbon nanotube film has a small heat capacity and a large specific surface area, and the carbon nanotubes in the carbon nanotube film are parallel to each other and evenly distributed, and the two ends of some carbon nanotubes are connected to the signal input device respectively. After the input signal, according to the change of signal intensity (such as current intensity), the sound-generating element composed of at least one layer of carbon nanotube film can make full use of the characteristics of carbon nanotubes, such as excellent axial conductivity, Thermal conductivity, can evenly heat the surrounding gas medium, quickly rise and fall in temperature, produce periodic temperature changes, and conduct rapid heat exchange with the surrounding gas medium, so that the surrounding gas medium expands and contracts rapidly, and emits a sound that can be perceived by the human ear. Moreover, the frequency range of the emitted sound is relatively wide (1 Hz-100 kHz), and the sounding effect is good, and the response speed of the sounding device is fast and the sensitivity is high. In addition, when the thickness of the sounding element is relatively small, such as less than 10 microns, the sounding element has high transparency, so the formed sounding device is a transparent sounding device, which can be directly installed on the display surface of various display devices and mobile phone display screens Or the surface of an oil painting display device, oil painting, etc. as a space-saving transparent sounding device. Fourth, since the plurality of carbon nanotubes in the sounding element form a network structure, and the network structure is composed of a plurality of micropores with a diameter less than 50 microns, the presence of the micropores can increase the size of the sounding element. The specific surface area is beneficial to improve the sound emitting effect of the sound emitting element. Fifth, since carbon nanotubes have good mechanical strength and toughness, the sounding element composed of at least two layers of carbon nanotube films arranged in different directions by carbon nanotubes has good mechanical strength and toughness, and has better durability. Well, it is beneficial to prepare sound emitting devices of various shapes and sizes composed of sound emitting elements, and then be conveniently applied in various fields. Sixth, when the supporting structure is a plane, the sounding element is directly arranged and adhered to the surface of the supporting structure, so the sounding element can withstand high-intensity signal input, thereby having a high sounding intensity; When the support structure is a V-shaped, U-shaped structure or a cavity with a narrow opening, the sound-generating element is partially arranged on the surface of the support structure to form a sound-absorbing space, and the support structure can reflect the The sound wave emitted by the sound generating element enhances the sound emitting effect of the sound generating device.

In addition, those skilled in the art can also make other changes within the spirit of the present invention. Of course, these changes made according to the spirit of the present invention should be included within the scope of protection claimed by the present invention.

Claims (18)

1. sound-producing device, it comprises:

One signal input apparatus; And

One sounding component, this sounding component is electrically connected with the two ends of described signal input apparatus;

It is characterized in that, the at least part of supporting construction surface that is arranged on of described sounding component, this sounding component comprises at least one deck carbon nano-tube film, this carbon nano-tube film comprises a plurality of carbon nano-tube that are parallel to each other, described signal input apparatus input electrical signal is given this sounding component, send sound wave by this sounding component circumference gas medium, the material of described supporting construction has heat-insulating property.

2. sound-producing device as claimed in claim 1 is characterized in that, the two ends of at least part of carbon nano-tube are electrically connected with the two ends of described signal input apparatus respectively in the described sounding component.

3. sound-producing device as claimed in claim 1 is characterized in that, the carbon nano-tube in the described carbon nano-tube film is arranged side by side, and combine closely by Van der Waals force between adjacent two carbon nano-tube, and the distance between adjacent two carbon nano-tube is less than 50 microns.

4. sound-producing device as claimed in claim 1, it is characterized in that, described sounding component comprises at least carbon nano-tube film of two superimposed setting, combine closely by Van der Waals force between the adjacent two layers carbon nano-tube film, and form an angle α between the carbon nano-tube in the adjacent two layers carbon nano-tube film, α is more than or equal to 0 degree and less than or equal to 90 degree.

5. sound-producing device as claimed in claim 4 is characterized in that, described sounding component is a network structure, and this network structure comprises equally distributed micropore, and the aperture of this micropore is less than 50 microns.

6. sound-producing device as claimed in claim 1 is characterized in that, the thickness of described sounding component is 0.5 nanometer～1 millimeter.

7. sound-producing device as claimed in claim 1, it is characterized in that, carbon nano-tube in the described carbon nano-tube film is one or more in Single Walled Carbon Nanotube, double-walled carbon nano-tube and the multi-walled carbon nano-tubes, the diameter of described Single Walled Carbon Nanotube is 0.5 nanometer～50 nanometers, the diameter of described double-walled carbon nano-tube is 1.0 nanometers～50 nanometers, and the diameter of described multi-walled carbon nano-tubes is 1.5 nanometers～50 nanometers.

8. sound-producing device as claimed in claim 1 is characterized in that, described sounding component directly arranges and fit in the surface of this supporting construction.

9. sound-producing device as claimed in claim 1 is characterized in that, the material of described supporting construction is diamond, glass, quartz, plastics or resin.

10. sound-producing device as claimed in claim 1, it is characterized in that, described supporting construction is the cavity that a V-type, U-shaped structure or have narrow openings, and described sounding component holds together sound space at described sounding component to forming one between the supporting construction by the unsettled setting of this supporting construction part.

11. sound-producing device as claimed in claim 1 is characterized in that, described supporting construction is a stereochemical structure, and described sounding component is around described supporting construction setting.

12. sound-producing device as claimed in claim 1 is characterized in that, described sound-producing device further comprises at least two electrodes, and this at least two electrode gap is arranged at described sounding component surface and is electrically connected with described sounding component.

13. sound-producing device as claimed in claim 12 is characterized in that, the two ends of the part carbon nano-tube in the described sounding component are electrically connected with described two electrodes respectively at least.

14. sound-producing device as claimed in claim 12 is characterized in that, described at least two electrodes further are electrically connected with the two ends of described signal input apparatus by wire.

15. sound-producing device as claimed in claim 14, it is characterized in that, described sound-producing device comprises a plurality of electrodes, this a plurality of electrode gap settings and all being electrically connected with described sounding component, and any two adjacent electrodes are electrically connected with the two ends of described signal input apparatus respectively in these a plurality of electrodes.

16. sound-producing device as claimed in claim 15 is characterized in that, the material of described electrode is metal, conducting resinl, metallic carbon nanotubes or indium tin oxide.

17. sound-producing device as claimed in claim 12 is characterized in that, described sound-producing device comprises that further a conduction tack coat is arranged between described two electrodes and the sounding component at least.

18. sound-producing device as claimed in claim 1 is characterized in that, the signal of described signal input apparatus input comprises ac signal or audio electrical signal.

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