CN101605290B - Sounding device - Google Patents
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- CN101605290B CN101605290B CN 200810067729 CN200810067729A CN101605290B CN 101605290 B CN101605290 B CN 101605290B CN 200810067729 CN200810067729 CN 200810067729 CN 200810067729 A CN200810067729 A CN 200810067729A CN 101605290 B CN101605290 B CN 101605290B
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Abstract
The invention relates to a sounding device comprising an electromagnetic wave signal input device and a sounding element, wherein the sounding element and the electromagnetic wave signal input device are arranged at intervals; the sounding element comprises at least one carbon nano tube film, and the carbon nano tube film includes a plurality of carbon nano tubes which are wound with each other; and the electromagnetic wave signal input device transmits an electromagnetic wave signal to the carbon nano tube film, thus the carbon nano tube film emits heat by absorbing the electromagnetic wave signal so as to heat an air medium to send sound waves.
Description
Technical field
The present invention relates to a kind of sound-producing device, relate in particular to a kind of sound-producing device based on carbon nano-tube.
Background technology
Sound-producing device generally is comprised of signal input apparatus and sounding component., and then sound to sounding component by the signal input apparatus input electrical signal.Sounding component of the prior art is generally a loud speaker.This loud speaker is a kind of electro-acoustic element that the signal of telecommunication is converted to voice signal.Particularly, can to change the audio-frequency electric power signal in the certain limit into distortion by the transducing mode little and have a sub-audible sound of enough sound pressure levels for loud speaker.The kind of loud speaker is a lot, although their working method is different, generally is by producing mechanical oscillation and promotes ambient air, thereby make air dielectric produce the conversion that fluctuation realizes " electricity-Li-sound ".
See also Fig. 1, existing dynamic speaker 100 is comprised of three parts usually: voice coil loudspeaker voice coil 102, magnet 104 and vibrating diaphragm 106.Voice coil loudspeaker voice coil 102 adopts a conductor usually, and when inputting a tone currents signal in the voice coil loudspeaker voice coil 102, voice coil loudspeaker voice coil 102 is equivalent to a current－carrying conductor.If place it in the fixed magnetic field, in magnetic field, can be subject to the Lorentz force effect according to current－carrying conductor, voice coil loudspeaker voice coil 102 can be subject to the power that a size is directly proportional with tone currents, direction changes with the tone currents direction.Therefore, voice coil loudspeaker voice coil 102 will produce vibration under magnetic fields, and drives vibrating diaphragm 106 vibrations, and the air of vibrating diaphragm 106 front and back is thereupon vibration also, converts the electrical signal to sound wave to radiation all around.Yet the structure of this dynamic speaker 100 is comparatively complicated, and it must be worked having under the condition of magnetic.
Further, the principle of sound of sound-producing device of the prior art is the transfer principle of " electricity-Li-sound ", and namely the fundamental prerequisite of sounding is the input of the signal of telecommunication.At extreme environment, as without under the electrical environment, then can't use above-mentioned sound-producing device and carry out sounding.
Optoacoustic effect refers to can produce the phenomenon of acoustical signal when material is subject to the irradiation of periodic intensity modulation.When material was subject to irradiation, material was stimulated because of absorbing light energy, and made all or part of heat that changes into of luminous energy of absorption by nonradiative transition.If the light beam of irradiation is through periodic intensity modulated, then in material, produce periodic variations in temperature, the cyclic variation that this part material and contiguous medium thereof is expanded with heat and contract with cold and produce stress (or pressure), thereby produce acoustical signal, this kind signal claims photoacoustic signal.The frequency of photoacoustic signal is identical with light modulation frequency, and its intensity and phase place then are decided by the characteristic of optics, calorifics, elasticity and the geometry of material.At present, utilize the optoacoustic spectrometer of optoacoustic effect manufacturing and photoacoustic microscope to be widely used in material composition analyzing and testing field.For example, optoacoustic spectrometer of the prior art generally comprises a light source, a sample room and a signal detector.This light source is generally pulsed laser source or the continuous laser source of a modulation.This signal detector is generally a microphone.Be placed with sample to be measured in this sample room, this specimen material is not limit, and can be gas, liquid or solid material, such as a pressed powder or a biological sample etc.This lasing light emitter Emission Lasers shines on the sample in the sample room, because the acoustic energy that produces in the optoacoustic effect directly is proportional to the luminous energy of material absorbing, and absorption peak appears in the material of heterogeneity at the wavelength place of Different lightwave, therefore when the light source with multiline or continuous spectrum shines sample with different wave length Shu Xiangji, the material of heterogeneity will produce photoacoustic signal maximum at the optical wavelength place corresponding with absworption peak separately in the sample.This signal detector is by the maximum of this photoacoustic signal of detection, thus the material category of judgement testing sample.
Yet, general material is subject to the restriction of light absorpting ability, the photoacoustce signal intensity that produces a little less than, and frequency range is more than megahertz, can only receive by transducing heads such as microphone or piezoelectric transducers, therefore, also do not utilize the sound-producing device of optoacoustic effect manufacturing that the voice signal of its generation can directly be perceived by the human ear in the prior art.In addition, the electromagnetic wave of broad sense is not used the sound-producing device that optoacoustic effect is made in the prior art yet.
Since the early 1990s, (see also Helical microtubules of graphiticcarbon with carbon nano-tube, Nature, Sumio Iijima, vol 354, p56 (1991)) caused that with its unique structure and character people pay close attention to greatly for the nano material of representative.In recent years, along with deepening continuously of carbon nano-tube and nano materials research, its wide application prospect constantly displayed.For example, because performances such as the electromagnetism of the uniqueness that carbon nano-tube has, optics, mechanics, chemistry, a large amount of relevant its application studies in fields such as field emitting electronic source, transducer, novel optical material, soft ferromagnetic materials constantly are in the news.Yet, find not yet but in the prior art that carbon nano-tube is used for field of acoustics as sounding component.
Therefore, necessaryly provide a kind of sound-producing device, this sound-producing device is simple in structure, can directly send the sound that can be perceived by the human ear under without magnetic, condition without electricity.
Summary of the invention
A kind of sound-producing device, it comprises an electromagnetic wave signal input unit and a sounding component.This sounding component and this electromagnetic wave signal input unit interval arrange.Wherein, described sounding component comprises a carbon nano-tube film, this carbon nano-tube film comprises the carbon nano-tube of a plurality of mutual windings, this electromagnetic wave signal input unit transmits electromagnetic wave signal to this carbon nano-tube film, this carbon nano-tube film is generated heat by absorbing this electromagnetic wave signal, thereby the heated air medium send sound wave.
Compared with prior art, described sound-producing device has the following advantages: one because the sounding component in the described sound-producing device only is comprised of carbon nano-tube film, need not other labyrinths such as magnet, so the structure of this sound-producing device is comparatively simple, be conducive to reduce the cost of this sound-producing device.Its two, this sound-producing device utilizes input signal to cause this carbon nano-tube film variations in temperature, thereby its surrounding gas medium is expanded rapidly and shrinks, and then sends sound wave, so the sound-producing device that this carbon nano-tube film forms can be worked under the condition without magnetic.They are three years old, because this carbon nano-tube film is comprised of the carbon nano-tube of mutual winding, therefore this carbon nano-tube film has less thermal capacitance and large specific area, so this carbon nano-tube film has the characteristics rapid, that thermo-lag is little, rate of heat exchange is fast that heat up, so the sound-producing device that this carbon nano-tube film forms can send the very interior sound (1Hz-100kHz) of broad spectrum, and has preferably sounding effect.They are four years old, because carbon nano-tube is twined mutually in the carbon nano-tube film, has preferably mechanical strength and toughness, described carbon nano-tube film can bending fold becomes arbitrary shape and does not break, thereby be conducive to prepare the various shapes that formed by carbon nano-tube film, the sound-producing device of size, and then be conveniently used in various fields.Its five because carbon nano-tube has great specific area, under the effect of Van der Waals force, carbon nano-tube film itself has good adhesion, so carbon nano-tube film can directly attach to the supporting construction surface easily.
Description of drawings
Fig. 1 is the structural representation of loud speaker in the prior art.
Fig. 2 is the structural representation of the technical program the first embodiment sound-producing device.
Fig. 3 is the stereoscan photograph of carbon nano-tube film in the technical program the first embodiment sound-producing device.
Fig. 4 is the structural representation of the technical program the second embodiment sound-producing device.
Embodiment
Describe the sound-producing device of the technical program embodiment in detail below with reference to accompanying drawing.
See also Fig. 2, the technical program the first embodiment provides a kind of sound-producing device 10, and this sound-producing device 10 comprises electromagnetic wave signal input unit 112, one sounding components, 114, one supporting constructions 116 and a modulating device 118.This sounding component 114 is arranged on this supporting construction 116.This supporting construction 116 is an optional structure, is used for supporting and fixing this sounding component 114.This electromagnetic wave signal input unit 112 and these sounding component 114 corresponding and interval settings are used for providing an electromagnetic wave signal 120.This modulating device 118 is arranged between this electromagnetic wave signal input unit 112 and the sounding component 114, is used for described electromagnetic wave signal 120 is carried out the modulation of intensity or frequency.The electromagnetic wave signal 120 that sends from this electromagnetic wave signal input unit 112 is undertaken by this modulating device 118 being passed to this sounding component 114 surfaces after the modulation of intensity and frequency.
Described sounding component 114 comprises a carbon nano-tube film.This carbon nano-tube film comprises the carbon nano-tube of a plurality of mutual windings, and its stereoscan photograph sees also Fig. 3.In the described carbon nano-tube film, carbon nano-tube is isotropism, evenly distributes random arrangement.Attract each other, twine by Van der Waals force between the described carbon nano-tube, form network-like structure, and then form a large amount of micropores.The aperture of this micropore is less than 10 microns.The existence of a large amount of micropores can guarantee that described sounding component 114 has larger specific area.The long and mutually winding of the length of described carbon nano-tube, therefore, this carbon nano-tube film has self supporting structure.Carbon nano-tube in the described carbon nano-tube film can be 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, and 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.Length and the width of described carbon nano-tube film are not limit, and can prepare according to the actual requirements.
The thickness that is appreciated that described carbon nano-tube film can not be too thick, too thickly then affects carbon nano-tube and surrounding gas medium carries out heat exchange, thereby affect the sounding effect of this sounding component 114.In addition, the thickness of this carbon nano-tube film can not be too thin, and too thin then this carbon nano-tube film intensity is relatively poor, damages easily in voiced process.When the Thickness Ratio of described carbon nano-tube film hour, for example less than 10 microns, this carbon nano-tube film has higher transparency, so adopt the sounding component 114 of this carbon nano-tube film to be transparent sound production element 114, at this moment, this sounding component 114 can be set directly at the upper surface of various display unit, mobile phone display screen or oil painting, thereby reach joint space-efficient purpose.Preferably, the thickness of described carbon nano-tube film is 0.5 nanometer～1 millimeter.Among the technical program embodiment, the length of described carbon nano-tube film is 3 centimetres, and width is 3 centimetres, and thickness is 50 nanometers.
In addition, because carbon nano-tube twines mutually, therefore described carbon nano-tube film has good toughness, can bending fold becomes arbitrary shape and does not break.Carbon nano-tube film among the technical program embodiment is a planar structure.
Described supporting construction 116 mainly plays a supportive role, and its shape is not limit, and any object with definite shape such as a wall or desktop, all can be used as the supporting construction 116 among the technical program the first embodiment.Particularly, this supporting construction 116 can be a plane or curved-surface structure, and has a surface.At this moment, this sounding component 114 directly arranges and fits on the surface of this supporting construction 116.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, so when adopting this carbon nano-tube film to make sounding component 114, carbon nano-tube film directly can be attached to supporting construction 116 surfaces.Further, can also mutually cohere by binding agent between described supporting construction 116 and the described sounding component 114, thereby described sounding component 114 is fixed on supporting construction 116 surfaces better.Described binding agent can be a resistant to elevated temperatures silica gel.
Support by supporting constructions 116 because this sounding component 114 is whole, so this sounding component 114 can higher electromagnetic wave signal 120 inputs of bearing strength, thereby have higher intensity of phonation.In addition, this supporting construction 116 also can be a frame structure, rod shaped structure or irregularly shaped structure.At this moment, these sounding component 114 parts contact with this supporting construction 116, the unsettled setting of remainder.This kind set-up mode can make this sounding component 114 and air or surrounding medium carry out better heat exchange.This sounding component 114 is larger with air or surrounding medium contact area, and rate of heat exchange is faster, therefore has better phonation efficiency.
The material of this supporting construction 116 is not limit, and can be a hard material, such as diamond, wood materials, glass or quartz.In addition, described supporting construction 116 also can be a flexible material, such as paper material, plastics or resin.Preferably, the material of this supporting construction 116 should have preferably heat-insulating property, thereby prevents excessive being absorbed by this supporting construction 116 of heat that this sounding component 114 produces, and can't reach the purpose that adds the hot-air sounding.In addition, this supporting construction 116 is preferably has a comparatively coarse surface, thereby can make the sounding component 114 that is arranged at above-mentioned supporting construction 116 surfaces have larger contact area with air or other extraneous media.
Be appreciated that because the carbon nano-tube film in the above-mentioned sounding component 114 is a self supporting structure, so this supporting construction 116 is an optional structure.
Described electromagnetic wave signal input unit 112 comprises an electromagnetic wave signal source, and the electromagnetic wave of intensity or changeable frequency can be sent in this electromagnetic wave signal source, forms an electromagnetic wave signal 120.The intensity of this electromagnetic wave signal 120 or frequency can constantly change, thereby can make the carbon nano-tube film as sounding component 114 absorb this electromagnetic wave signal 120 intermittent-heating air, make the continuous dilation of air, and then continue to sound.The frequency range of this electromagnetic wave signal 120 comprises radio wave, infrared ray, visible light, ultraviolet ray, microwave, X ray and gamma-rays etc.Preferably, this electromagnetic wave signal source is an optical signal source, and the electromagnetic wave signal 120 that sends can be a light signal, and the wavelength of this light signal comprises the various light waves from ultraviolet to the far infrared wavelength.The average power density of this electromagnetic wave signal 120 is at 1 μ W/mm
2～20W/mm
2In the scope.Be appreciated that, the intensity of this electromagnetic wave signal 120 can not be too a little less than, the abundant circumference air of carbon nano-tube film is sounded, and, the intensity of this electromagnetic wave signal 120 can not be too strong, force very much carbon nano-tube film and airborne oxygen to react, thereby destroy this carbon nano-tube film.Preferably, this electromagnetic wave signal source is a pulse laser generator.
Incident angle and the position of the electromagnetic wave signal 120 that this electromagnetic wave signal input unit 112 sends on sounding component 114 do not limit.In addition, the distance between this electromagnetic wave signal input unit 112 and the sounding component 114 is not limit, but should guarantee can be passed to this sounding component 114 surfaces from the electromagnetic wave that this electromagnetic wave signal input unit 112 sends.Preferably, when this electromagnetic wave signal is a light signal, and when this electromagnetic wave signal input unit 112 and this sounding component 114 are distant, this electromagnetic wave signal input unit 112 may further include an optical fiber, this optical fiber one end is connected with described optical signal source, the other end extends near the described carbon nano-tube film, thereby makes the electromagnetic wave signal 120 that sends by above-mentioned laser generator be passed at a distance sounding component 114 surfaces by optical fiber.
Described modulating device 118 is an optional structure, is arranged on the transmission path of this electromagnetic wave signal 120, comprises intensity modulator, frequency modulator or both combinations.Described sound-producing device 10 is modulated by intensity and the frequency of 118 pairs of electromagnetic wave signals 120 of modulating device, thereby realizes making the intensity of the sound that sounding component 114 sends and the change of frequency.Particularly, can by the power with different frequency switch electromagnetic wave signal 120 modulated electromagnetic wave signals 120, perhaps change the power of the intensity modulated electromagnetic wave signal 120 of electromagnetic wave signal 120 with different frequency.The variation of variable effect sounding component 114 audible frequencies of electromagnetic wave signal 120 powers.By this electromagnetic wave signal 120 is modulated, can make this sounding component 114 send the sound of different frequency.Be appreciated that this modulating device 118 can be with described electromagnetic wave signal input unit 112 integrated or interval arrange.When described electromagnetic wave signal input unit 112 comprised an optical fiber, this modulating device 118 can be arranged at the initiating terminal of optical fiber or finish on the end.In the present embodiment, this modulating device 118 is an electrooptic crystal.
Adopt carbon nano-tube film as sounding component in the technical program embodiment sound-producing device and since carbon nano-tube to electromagnetic absorption near absolute black body, thereby make sound-producing device have the absorption characteristic of homogeneous for the electromagnetic wave of various wavelength.In addition, carbon nano-tube has less thermal capacitance and larger area of dissipation.Therefore, when the carbon nano-tube in the sounding component 114 was subject to such as electromagnetic irradiations such as laser, carbon nano-tube was stimulated because of absorbing light energy, and by the non-radiative all or part of heat that changes into of luminous energy that makes absorption.The carbon nano-tube temperature raises rapidly, and carries out rapidly heat exchange with ambient air or other media.If the electromagnetic wave of irradiation is through periodic intensity modulated, then in carbon nano-tube, produce periodic variations in temperature, thereby make the gas medium around it also produce periodic variations in temperature, cause surrounding air or other media to expand rapidly and shrink, thereby sound.Further, in the present embodiment, described sounding component 114 comprises the carbon nano-tube film that is comprised of a large amount of carbon nano-tube of mutually twining, the frequency of the electromagnetic wave signal 120 that therefore sends when electromagnetic wave signal input unit 118 is suitable, and when sounding component 114 surrounding mediums were air, the sound that sounding component 114 sends can directly be perceived by the human ear.When being appreciated that the increase frequency when electromagnetic wave signal 120, this sounding component 114 can send ultrasonic wave.
See also Fig. 4, the technical program the second embodiment provides a kind of sound-producing device 20, and this sound-producing device 20 comprises a signal input apparatus 212, a sounding component 214, a supporting construction 216 and a modulating device 218.
This supporting construction 216 is a frame structure, rod shaped structure or irregularly shaped structure.These sounding component 214 parts contact with this supporting construction 216, and the unsettled setting of remainder is transmitted thereby make sound can see through this sounding component 214.This electromagnetic wave signal input unit 212 and these sounding component 214 corresponding and interval settings.This modulating device 218 is arranged between this electromagnetic wave signal input unit 212 and the sounding component 214.
The structure basic simlarity of the sound-producing device 10 among this sound-producing device 20 and the first embodiment, be with the difference of sound-producing device 10 among the first embodiment, this sound-producing device 20 further comprises holding together sound structure 222, and this holds together sound structure 222 and is disposed on described sounding component 214 away from a side of electromagnetic wave signal 220 inputs.This holds together settings of being separated by of sound structure 222 and this sounding component 214, thereby the sound wave that sounding component 214 is sent reflects by holding together sound structure 222, strengthens the sounding effect of this sound-producing device 20.According to the size of sounding component 214, this distance can be 1 centimetre～1 meter.Being appreciated that this holds together sound structure 222 can be for having the various structures on a larger surface, such as a planar structure or a curved-surface structure.In the present embodiment, this holds together sound structure 222 is a flat board.This holds together sound structure 222 can be by support and this sounding component 214 intervals.In addition, this holds together the integral body that sound structure 222 and this supporting construction 216 also can be an integrated setting, and such as a cavity with narrow openings, this sounding component 214 is tiled on the opening of this cavity, thereby forms a helmholtz resonance chamber.This material that holds together sound structure 222 is wooden, plastics, metal or glass etc.
The intensity of phonation of the sound-producing device that the technical program embodiment provides can reach 100 dB sound pressure levels, and the audible frequency scope is 1 hertz to 100,000 hertz (being 1Hz-100kHz).In addition, carbon nano-tube film among the technical program embodiment is comprised of the carbon nano-tube of a plurality of mutual windings, so this carbon nano-tube film has preferably toughness and mechanical strength, utilize described carbon nano-tube film can make easily the sound-producing device of various shape and size, this sound-producing device can be conveniently used in the various musical instrumentses, in the electronic applications such as sound equipment, mobile phone, MP3, MP4, TV, computer and other sound-producing device.In addition because electromagnetic wave, especially laser, in a vacuum long-distance communications, this sound-producing device can be used for the distant signal transmission field, as with voice signal by electromagnetic form long-distance transmissions.Further, because above-mentioned sounding component gets final product sounding by electromagnetic wave irradiation, therefore, when this electromagnetic wave was infrared ray, visible light, ultraviolet ray, microwave, X ray and gamma-rays, this sounding component can be one without electricity, without the extreme environment work of magnetic.
The sound-producing device that the technical program embodiment provides has the following advantages: one, because the sounding component in the described sound-producing device only is comprised of carbon nano-tube film, need not other labyrinths such as magnet, so the structure of this sound-producing device is comparatively simple, be conducive to reduce the cost of this sound-producing device.Its two because the described sounding component that is comprised of carbon nano-tube film can be by inputting an electromagnetic wave signal sounding, therefore, this sounding component can be worked without under the electrical environment one.Its three, this sound-producing device utilizes input signal to cause this carbon nano-tube film variations in temperature, thereby its surrounding gas medium is expanded rapidly and shrinks, and then sends sound wave, so the sound-producing device that this carbon nano-tube film forms can be worked under the condition without magnetic.They are four years old, because this carbon nano-tube film is comprised of the carbon nano-tube of mutual winding, therefore this carbon nano-tube film has less thermal capacitance and large specific area, so this carbon nano-tube film has the characteristics rapid, that thermo-lag is little, rate of heat exchange is fast that heat up, so the sound-producing device that this carbon nano-tube film forms can send the very interior sound (1Hz-100kHz) of broad spectrum, and has preferably sounding effect.They are five years old, because carbon nano-tube is twined mutually in the carbon nano-tube film, has preferably mechanical strength and toughness, described carbon nano-tube film can bending fold becomes arbitrary shape and does not break, thereby be conducive to prepare the various shapes that formed by carbon nano-tube film, the sound-producing device of size, and then be conveniently used in various fields.Its six because carbon nano-tube has great specific area, under the effect of Van der Waals force, carbon nano-tube film itself has good adhesion, so carbon nano-tube film can directly attach to the supporting construction surface easily.Its seven, when this sounding component Thickness Ratio hour, for example less than 10 microns, this sounding component has higher transparency, at this moment, this sounding component can be set directly at the display surface of various display unit, mobile phone display screen or the upper surface of oil painting, thereby reach joint space-efficient purpose.Its eight, described sound-producing device can further comprise supporting construction and hold together the sound structure, this supporting construction can improve the intensity of phonation of sound-producing device, this holds together the sound wave that the sound structure can the reflection sounding element be sent, and strengthens the sounding effect of described sound-producing device.
In addition, those skilled in the art also can do other variations in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention all should be included within the present invention's scope required for protection.
Claims (17)
1. sound-producing device, it comprises:
One electromagnetic wave signal input unit;
One sounding component, and the interval setting corresponding with this electromagnetic wave signal input unit of this sounding component;
It is characterized in that, this sounding component comprises a carbon nano-tube film, this carbon nano-tube film comprises the carbon nano-tube of a plurality of mutual windings, this electromagnetic wave signal input unit transmits electromagnetic wave signal to this carbon nano-tube film, this carbon nano-tube film is generated heat by absorbing this electromagnetic wave signal, thereby the heated air medium send sound wave.
2. sound-producing device as claimed in claim 1 is characterized in that, attracts each other, twines by Van der Waals force between the carbon nano-tube in the described carbon nano-tube film, forms network-like structure.
3. sound-producing device as claimed in claim 1 is characterized in that, the carbon nano-tube isotropism in the described carbon nano-tube film evenly distributes random arrangement.
4. sound-producing device as claimed in claim 1 is characterized in that, described carbon nano-tube film comprises that the aperture is less than 10 microns microcellular structure.
5. sound-producing device as claimed in claim 1 is characterized in that, the thickness of described carbon nano-tube film is 0.5 nanometer ~ 1 millimeter.
6. sound-producing device as claimed in claim 1 is characterized in that, this sound-producing device further comprises a supporting construction, and described sounding component is fixedly installed by this supporting construction.
7. sound-producing device as claimed in claim 6 is characterized in that, described supporting construction is a plane or curved-surface structure, and has a surface, and described sounding component directly arranges and fit in the surface of this supporting construction.
8. sound-producing device as claimed in claim 6 is characterized in that, described supporting construction is a frame structure, rod shaped structure or irregularly shaped structure, and described sounding component is by this support construction supports and the unsettled setting of part.
9. sound-producing device as claimed in claim 8 is characterized in that, described sound-producing device further comprises holding together the sound structure, describedly holds together the sound structure and is arranged at sounding component away from a side of electromagnetic wave signal input unit, and interval relative with described sounding component arranges.
10. sound-producing device as claimed in claim 6 is characterized in that, the material of described supporting construction is diamond, glass, quartz, plastics, resin, wood materials or paper material.
11. sound-producing device as claimed in claim 1 is characterized in that, described sound-producing device further comprises holding together the sound structure, describedly holds together the sound structure and comprises a helmholtz resonance chamber, and described sounding component holds together the sound structure by this and is fixedly installed.
12. sound-producing device as claimed in claim 1 is characterized in that, described electromagnetic wave signal is one or more in radio wave, infrared ray, visible light, ultraviolet ray, microwave, X ray and the gamma-rays.
13. sound-producing device as claimed in claim 1, it is characterized in that, described electromagnetic wave signal input unit comprises an optical signal source, and described electromagnetic wave signal input unit sends light signal by this optical signal source, and the wave-length coverage of this light signal is between ultra-violet (UV) band to the far-infrared band.
14. sound-producing device as claimed in claim 13 is characterized in that, described optical signal source is a pulse laser generator.
15. sound-producing device as claimed in claim 13, it is characterized in that described electromagnetic wave signal input unit comprises an optical fiber, this optical fiber one end is connected with described optical signal source, the other end extends near the described carbon nano-tube film, and described light signal is handed to described carbon nano-tube film by optical fiber transmission.
16. sound-producing device as claimed in claim 1, it is characterized in that, this sound-producing device further comprises a modulating device, this modulating device is arranged between described electromagnetic wave signal input unit and the sounding component, and be positioned on the transmission path of described electromagnetic wave signal, this modulating device comprises intensity modulated device, frequency modulating device or both combinations.
17. sound-producing device as claimed in claim 1 is characterized in that, the average power density of described electromagnetic wave signal is 1 μ W/mm
2~ 20W/mm
2
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810067729 CN101605290B (en) | 2008-06-13 | 2008-06-13 | Sounding device |
| KR1020090045926A KR101145459B1 (en) | 2008-06-04 | 2009-05-26 | Sound emitting device, acoustic transmitting system using the sound emitting device, method and device for detecting electromagnetic signal |
| EP09161790.2A EP2138998B1 (en) | 2008-06-04 | 2009-06-03 | Thermoacoustic device comprising a carbon nanotube structure |
| US12/455,606 US8249279B2 (en) | 2008-04-28 | 2009-06-04 | Thermoacoustic device |
| JP2009141557A JP5270461B2 (en) | 2008-06-13 | 2009-06-12 | Thermoacoustic device |
| US12/459,495 US8059841B2 (en) | 2008-04-28 | 2009-07-02 | Thermoacoustic device |
| US12/459,565 US8259966B2 (en) | 2008-04-28 | 2009-07-02 | Acoustic system |
| US12/459,543 US8050431B2 (en) | 2008-04-28 | 2009-07-02 | Thermoacoustic device |
| US12/459,564 US8068626B2 (en) | 2008-04-28 | 2009-07-02 | Thermoacoustic device |
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| CN 200810067729 CN101605290B (en) | 2008-06-13 | 2008-06-13 | Sounding device |
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| CN101605290A CN101605290A (en) | 2009-12-16 |
| CN101605290B true CN101605290B (en) | 2013-02-13 |
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| EP2138998B1 (en) * | 2008-06-04 | 2019-11-06 | Tsing Hua University | Thermoacoustic device comprising a carbon nanotube structure |
| CN101841759A (en) | 2010-05-10 | 2010-09-22 | 北京富纳特创新科技有限公司 | Thermo-acoustic device |
| JP5743113B2 (en) | 2013-08-28 | 2015-07-01 | 三菱自動車工業株式会社 | Fuel tank system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1821048A (en) * | 2005-02-18 | 2006-08-23 | 中国科学院理化技术研究所 | Micronl nano thermoacoustic vibration excitor based on thermoacoustic conversion |
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| JP2005051284A (en) * | 2003-07-28 | 2005-02-24 | Kyocera Corp | Sound wave generator, speaker using the same, headphone, and earphone |
| CN101599268B (en) * | 2008-06-04 | 2013-06-05 | 北京富纳特创新科技有限公司 | Sound-producing device and sound-producing element |
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| CN1821048A (en) * | 2005-02-18 | 2006-08-23 | 中国科学院理化技术研究所 | Micronl nano thermoacoustic vibration excitor based on thermoacoustic conversion |
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| JP5270461B2 (en) | 2013-08-21 |
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