CN101599268B - Sound-producing device and sound-producing element - Google Patents
Sound-producing device and sound-producing element Download PDFInfo
- Publication number
- CN101599268B CN101599268B CN 200910147484 CN200910147484A CN101599268B CN 101599268 B CN101599268 B CN 101599268B CN 200910147484 CN200910147484 CN 200910147484 CN 200910147484 A CN200910147484 A CN 200910147484A CN 101599268 B CN101599268 B CN 101599268B
- Authority
- CN
- China
- Prior art keywords
- carbon nano
- sound
- producing device
- nano tube
- tube structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention relates to a sound-producing device, which comprises an electromagnetic wave signal input device and a sound-producing element, wherein the sound-producing element comprises a carbon nanotube structure which contacts with a medium; and the electromagnetic wave signal input device transmits electromagnetic wave signals to the carbon nanotube structure, the carbon nanotube structure is heated by absorbing the electromagnetic wave signals, so that the medium is heated to produce sound waves. The invention also relates to the sound-producing element.
Description
Technical field
The present invention relates to a kind of sound-producing device and sounding component, relate in particular to a kind of sound-producing device based on carbon nano-tube and sounding component.
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 loudspeaker.This loudspeaker is a kind of electro-acoustic element that electric signal is converted to voice signal.Particularly, can to change the audio-frequency electric power signal in certain limit into distortion by the transducing mode little and have a sub-audible sound of enough sound pressure levels for loudspeaker.The kind of loudspeaker is a lot, although their working method is different, generally is by producing mechanical vibration and promotes ambient air, thereby make air dielectric produce the conversion that fluctuation realizes " electricity-Li-sound ".
See also Fig. 1, existing D.sp. 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 voice coil loudspeaker voice coil 102, voice coil loudspeaker voice coil 102 is equivalent to a current－carrying conductor.If place it in fixed magnetic field, can be subject to the Lorentz force effect 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 tone currents direction.Therefore, voice coil loudspeaker voice coil 102 will produce vibration under magnetic fields, and drives vibrating diaphragm 106 vibrations, and the also vibration thereupon of air of vibrating diaphragm 106 front and back converts the electrical signal to sound wave to the surrounding radiation.Yet the structure of this D.sp. 100 is comparatively complicated, and the magnet in loudspeaker 100 102 may to other with it close electronic equipment cause adverse effect.
Further, the principle of sound of loudspeaker of the prior art is the transfer principle of " electricity-Li-sound ", and namely the fundamental prerequisite of sounding is the input of electric signal.At extreme environment, as without under electrical environment, can't use above-mentioned loudspeaker 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 absorbing luminous energy, and by the non-radiative all or part of heat that changes into of luminous energy that makes absorption.If the light beam of irradiation is through periodic intensity modulated, produce periodic temperature variation in material, the cyclical 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 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 chamber 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 chamber, this specimen material is not limit, and can be gas, liquid or solid material, as a pressed powder or a biological sample etc.This lasing light emitter Emission Lasers shines on sample in the sample chamber, directly be proportional to the luminous energy of material absorbing due to the acoustic energy that produces in optoacoustic effect, and the material of heterogeneity absorption peak occurs at the wavelength place of Different lightwave, therefore when the light source with multiline or continuous spectrum shone sample with different wave length Shu Xiangji, in sample, the material of heterogeneity will be in the optical wavelength place generation photoacoustic signal maximum value corresponding with absorption peak separately.This signal detector is by the maximum value 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 sensors, 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 prior art.In addition, the electromagnetic wave of broad sense is not used the sound-producing device that optoacoustic effect is made in 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, the performances such as the electromagnetics of the uniqueness that has due to carbon nano-tube, optics, mechanics, chemistry, a large amount of relevant its applied researcies in fields such as field emitting electronic source, sensor, novel optical material, soft ferromagnetic materials constantly are in the news.Yet, find not yet but in prior art that carbon nano-tube is used for field of acoustics as sounding component.
Summary of the invention
Therefore, necessary a kind of sound-producing device and the sounding component of providing, this sound-producing device is simple in structure, and the sounding component in this sound-producing device need not magnet, can directly send the sound that can be perceived by the human ear under the condition without electricity.
A kind of sound-producing device, it comprises: an electromagnetic wave signal input media; An and sounding component; Wherein, this sounding component comprises a carbon nano tube structure, and this carbon nano tube structure and a medium contact, this electromagnetic wave signal input media transmit electromagnetic wave signal to this carbon nano tube structure, make this carbon nano tube structure by absorbing this electromagnetic wave signal heating, send sound wave thereby heat this medium.
A kind of sounding component, it comprises a carbon nano tube structure, this carbon nano tube structure also generates heat by absorbing an electromagnetic wave signal, thus heating medium sends sound wave.
A kind of sound-producing device, it comprises: a carbon nano tube structure, this carbon nano tube structure and a medium contact by absorbing an electromagnetic wave signal heating, send sound wave thereby heat this medium; And a matrix, this carbon nano tube structure is arranged at this matrix surface, and wherein, this matrix is display, mobile phone, computer, TV, sound equipment, door, window, screen, furniture or the vehicles.
A kind of sound-producing device, it comprises: one or more ordinary light sources; One carbon nano tube structure, this carbon nano tube structure and a medium contact generate heat by absorbing the light that this ordinary light source sends, and send sound wave thereby heat this medium; And one modulation circuit be electrically connected to this ordinary light source, control the variation of intensity or the frequency of this ordinary light source by the audio electrical signal of input.
Compared with prior art, described sound-producing device and sounding component have the following advantages: one, because the sounding component in described sound-producing device can only be comprised of carbon nano tube structure, need not other labyrinths such as magnet, therefore the structure of this sound-producing device is comparatively simple, be conducive to reduce the cost of this sound-producing device.They are two years old, this sound-producing device utilizes input signal to cause this carbon nano tube structure temperature variation, thereby makes its surrounding gas medium expand rapidly and shrink, and then sends sound wave, therefore the sounding component that this carbon nano tube structure forms need not magnet, avoids other electronic equipment is caused adverse effect.They are three years old, because this carbon nano tube structure has less thermal capacitance and larger specific surface area, therefore this carbon nano tube structure has the characteristics rapid, that thermo-lag is little, rate of heat exchange is fast that heat up, therefore the sounding component that this carbon nano tube structure forms can send the very interior sound (1Hz-100kHz) of broad spectrum, and has sounding effect preferably.They are four years old, because carbon nano-tube has physical strength and toughness preferably, therefore the carbon nano tube structure that is comprised of carbon nano-tube has physical strength and toughness preferably, durability is better, thereby be conducive to prepare the various shapes that formed by carbon nano tube structure, the sound-producing device of size, and then be conveniently used in various fields.Its five, this carbon nano tube structure is by being converted to heat with electromagnetic wave signal, need not energising and gets final product sounding, is suitable for using under particular surroundings.
Description of drawings
Fig. 1 is the structural representation of loudspeaker 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 the first embodiment of the invention sound-producing device.
Fig. 4 is the carbon nano tube structure that is woven into by a plurality of liner structure of carbon nano tube in the first embodiment of the invention sound-producing device.
Fig. 5 is the stereoscan photograph of the carbon nano tube line of non-torsion in the first embodiment of the invention sound-producing device.
Fig. 6 is the stereoscan photograph of the carbon nano tube line that reverses in the first embodiment of the invention sound-producing device.
Fig. 7 is the structural representation of the sounding component of unsettled setting in the first embodiment of the invention sound-producing device.
Fig. 8 is the structural representation that first embodiment of the invention is passed through the sound-producing device of optical signal transmission fiber.
Fig. 9 is the structural representation of second embodiment of the invention sound-producing device.
Figure 10 is the structural representation that second embodiment of the invention has the sound-producing device of cavity.
Figure 11 is the structural representation of the sound-producing device of third embodiment of the invention.
Figure 12 is the schematic top plan view of the sound-producing device in Figure 11.
Embodiment
Describe the sound-producing device of the embodiment of the present invention in detail below with reference to accompanying drawing.
See also Fig. 2, first embodiment of the invention provides a kind of sound-producing device 10, and this sound-producing device 10 comprises electromagnetic wave signal input media 112, one sounding component 114, one supporting constructions 116 and modulating devices 118.This sounding component 114 is arranged on this supporting construction 116, and supports by this supporting construction 116.This electromagnetic wave signal input media 112 and interval corresponding with this sounding component 114 arranges, and is used for providing an electromagnetic wave signal 120.This modulating device 118 is arranged between this electromagnetic wave signal input media 112 and 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 media 112 carries out being passed to after the modulation of intensity and frequency this sounding component 114 surfaces by this modulating device 118.
Described sounding component 114 comprises a carbon nano tube structure.This carbon nano tube structure contacts with a gas or liquid medium.This carbon nano tube structure comprises a large amount of carbon nano-tube.This carbon nano tube structure can be the carbon nano tube structure of a self-supporting, or the carbon nano tube structure of a non-self-supporting.In the present embodiment, this carbon nano tube structure is a self supporting structure.So-called " self supporting structure " i.e. this carbon nano tube structure need not by a support body supports, also can keep self specific shape, unsettled setting and two sides all can with air or other medium contact.Because a large amount of carbon nano-tube in the carbon nano tube structure of this self supporting structure attract each other by Van der Waals force, thereby make carbon nano tube structure have specific shape, form a self supporting structure.
This carbon nano tube structure is stratiform, wire or other shape, and has larger specific surface area.Described carbon nano tube structure comprises equally distributed carbon nano-tube.Carbon nano-tube in this carbon nano tube structure is unordered or ordered arrangement, thereby forms unordered or orderly carbon nano tube structure.The orientation of the unordered finger carbon nano-tube here is random; The orientation that refers in order most at least carbon nano-tube has certain rule, as substantially along a fixed-direction preferred orientation or substantially along several fixed-direction preferred orientations.Particularly, this ordered carbon nanotube structure can comprise a plurality of intervals, and the carbon nano-tube in each interval is arranged along equidirectional, and the carbon nano-tube in different intervals can be arranged along identical or different direction.The carbon nano tube structure isotropy that the carbon nano-tube of this lack of alignment forms.
When this carbon nano tube structure comprises a large amount of carbon nano-tube, and adjacent carbon nano-tube has certain interval, thereby makes this carbon nano tube structure have a large amount of micropores, thereby makes this carbon nano tube structure have great specific surface area.In in this enforcement, this carbon nano tube structure specific surface area is greater than 100 square metres of every grams.
Particularly, this carbon nano tube structure comprises at least one carbon nano-tube film, at least one liner structure of carbon nano tube or its combination in any.This carbon nano-tube film is orderly carbon nano-tube film (being the carbon nano-tube ordered arrangement in carbon nano-tube film) or unordered carbon nano-tube film (being the carbon nano-tube lack of alignment in carbon nano-tube film).This carbon nano tube structure can comprise that a plurality of carbon nano-tube films are mutual stacked or mutually be arranged side by side.See also Fig. 3, when carbon nano-tube film comprised the carbon nano-tube of ordered arrangement, this carbon nano-tube joined end to end by Van der Waals force.The thickness of this carbon nano-tube film can be 0.5 nanometer～100 micron.Described liner structure of carbon nano tube comprises at least one carbon nano tube line.When this liner structure of carbon nano tube comprised a plurality of carbon nano tube line, these a plurality of carbon nano tube lines were arranged parallel to each other and form fascircular texture or the mutual twisted arrangement composition of this a plurality of carbon nano tube lines twisted wire structure.See also Fig. 4, when described carbon nano tube structure comprised a plurality of liner structure of carbon nano tube 149, these a plurality of liner structure of carbon nano tube 149 can be parallel to each other, side by side or the planar carbon nano tube structure of one-tenth arranged in a crossed manner one or mutually be wound around or be woven into a planar carbon nano tube structure.
This carbon nano tube line can be the carbon nano tube line of non-torsion or the carbon nano tube line of torsion.The carbon nano tube line of this non-torsion obtains for the carbon nano-tube membrane is processed by organic solvent.See also Fig. 5, the carbon nano tube line of this non-torsion comprises a plurality of carbon nano-tube that the carbon nano tube line length direction is arranged that are parallel to.Preferably, this carbon nano-tube joins end to end by Van der Waals force.Particularly, the carbon nano tube line of this non-torsion comprises a plurality of carbon nano-tube fragments, and these a plurality of carbon nano-tube fragments join end to end by Van der Waals force, and each carbon nano-tube fragment comprises a plurality of carbon nano-tube that are parallel to each other and combine closely by Van der Waals force.This carbon nano-tube fragment has length, thickness, homogeneity and shape arbitrarily.The carbon nano tube line of this torsion is for adopting a mechanical force that acquisition is reversed at described carbon nano-tube membrane two ends in opposite direction.See also Fig. 6, the carbon nano tube line of this torsion comprises a plurality of carbon nano-tube of arranging around the carbon nano tube line axial screw.Particularly, the carbon nano tube line of this torsion comprises a plurality of carbon nano-tube fragments, and these a plurality of carbon nano-tube fragments join end to end by Van der Waals force, and each carbon nano-tube fragment comprises a plurality of carbon nano-tube that are parallel to each other and combine closely by Van der Waals force.This carbon nano-tube fragment has length, thickness, homogeneity and shape arbitrarily.This carbon nano-tube line length is not limit, and diameter is 0.5 nanometer-100 micron.
Further, can adopt a volatile organic solvent to process the carbon nano tube line of this torsion.Under the capillary effect that produces when volatile organic solvent volatilizees, carbon nano-tube adjacent in the carbon nano tube line of the torsion after processing is combined closely by Van der Waals force, diameter and the specific surface area of the carbon nano tube line of torsion are reduced, and density and intensity increase.
Because this carbon nano tube line obtains for adopting organic solvent or mechanical force to process above-mentioned carbon nano-tube membrane, this carbon nano-tube membrane is self supporting structure, therefore this carbon nano tube line is self supporting structure.
In addition, this carbon nano tube structure also can be combined to form by above-mentioned carbon nano-tube film and liner structure of carbon nano tube.Particularly, described liner structure of carbon nano tube can be parallel or the surface that is arranged at described carbon nano-tube film that intersects, thereby play an effect of supporting, and strengthens the toughness of carbon nano tube structure under the condition of the specific surface area that does not reduce carbon nano tube structure.When this carbon nano tube structure when being planar, thickness is 0.5 nanometer～1 millimeter.Carbon nano-tube in this carbon nano tube structure comprises 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 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.
In a word, the concrete structure of described carbon nano tube structure is not limit, and only need meet the following conditions, that is: this carbon nano tube structure has larger specific surface area; Comprise equally distributed carbon nano-tube; And the thickness of planar carbon nano tube structure is 0.5 nanometer～1 millimeter.
Carbon nano-tube is converted to heat with the electromagnetic wave of luminous energy or other form.Because described carbon nano tube structure has less unit area thermal capacitance (less than 2 * 10
-4Every square centimeter of Kelvin of joule), therefore the temperature of this carbon nano tube structure changes rapidly with the heat that produces.Because described carbon nano tube structure has larger specific surface area, therefore can carry out heat interchange with ambient gas or liquid medium rapidly after the electromagnetic power generation heat of this carbon nano tube structure absorption luminous energy or other form, thereby make the heating of ambient gas or liquid medium, cause gas or liquid medium expand and shrink and sound because density changes, and this sound can reach people's ear and can listen intensity.
In addition, because carbon nano tube structure has larger specific surface area, under the effect of Van der Waals force, this carbon nano tube structure itself has good adhesiveness, therefore when adopting this carbon nano tube structure to make sounding component 114, this sounding component 114 can directly be adhered fixed on described supporting construction 116.In addition, this sounding component 114 also can pass through a cementing agent and 116 combinations of described supporting construction.Described cementing agent can be a resistant to elevated temperatures silica gel.
Because this carbon nano tube structure comprises equally distributed carbon nano-tube, this carbon nano tube structure can add hot-air uniformly sounds, thereby makes this sounding component 114 have uniform sounding effect.
Because this carbon nano tube structure should have larger specific surface area, therefore the thickness of this carbon nano tube structure can not be too thick, the too thick carbon nano-tube and ambient gas or liquid medium of affecting carried out heat interchange.In addition, the thickness of this carbon nano tube structure can not be too thin, and too thin this carbon nano tube structure intensity is relatively poor, easily damages in voiced process.Be appreciated that, when the thickness less of this carbon nano tube structure, for example less than 10 microns, this carbon nano tube structure has higher transparency (visible light transmissivity can reach 70%-95%), therefore adopt the sounding component 114 of this carbon nano tube structure to be transparent sound production element 114, at this moment, this sounding component 114 can be set directly at the surface of display surface or the oil painting of various display device, mobile phone display screen, save the space-efficient purpose thereby reach.
Described supporting construction 116 mainly plays a supportive role, and its shape is not limit, and any object with definite shape as a wall or desktop, all can be used as the supporting construction 116 in first embodiment of the invention.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.Support by supporting construction 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 framed structure, rod-like structure or irregularly shaped structure.At this moment, these sounding component 114 parts contact with this supporting construction 116, the unsettled setting of remainder.For example, see also Fig. 7, sounding component 114 can comprise the two mutual also carbon nano-tube films of stacked setting that intersect, and the carbon nano-tube film edge of this intersection supports by this supporting construction 116, the unsettled setting in middle part.This kind set-up mode can make this sounding component 114 and air or surrounding medium carry out better heat interchange.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, as adamas, wood materials, glass or quartz.In addition, described supporting construction 116 also can be a flexible material, as paper material, plastics or resin.Preferably, the material of this supporting construction 116 should have heat-insulating property preferably, thereby prevents excessive being absorbed by this supporting construction 116 of heat that this sounding component 114 produces, and can't reach the purpose of circumference gas or liquid medium 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.Perhaps, this supporting construction 116 surfaces can have a recess, and as a through hole or blind hole, it is unsettled that this sounding component 114 covers this recess place, thus the contact area of increase and air or other medium.
Be appreciated that because the carbon nano tube structure in above-mentioned sounding component 114 is a self supporting structure, therefore this supporting construction 116 is an optional structure.
Described electromagnetic wave signal input media 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 structure 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 radiowave, 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 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 structure is sounded, and, the intensity of this electromagnetic wave signal 120 can not be too strong, force very much carbon nano tube structure and airborne oxygen to react, thereby destroy this carbon nano tube structure.The average power density of this electromagnetic wave signal 120 is larger, and the intensity of phonation of this carbon nano tube structure is stronger.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 media 112 sends on sounding component 114 do not limit.In addition, the distance between this electromagnetic wave signal input media 112 and 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 media 112 sends.Preferably, this electromagnetic wave signal is a light signal.See also Fig. 8, this electromagnetic wave signal input media 112 is distant and electromagnetic wave with this sounding component 114, when particularly the transmission of light wave is subjected to object blocks, this electromagnetic wave signal input media 112 may further include an optical fiber 122, these optical fiber 122 1 ends are connected with described optical signal source 124, the other end extends near 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 122.
Described modulating device 118 is a selectable elements, 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 the integrated or interval setting with described electromagnetic wave signal input media 112.When described electromagnetic wave signal input media 112 comprised an optical fiber 122, this modulating device 118 can be arranged at the initiating terminal of optical fiber 122 or finish on end.In the present embodiment, this modulating device 118 is an electro-optic crystal.Be appreciated that the electromagnetic wave signal 120 that itself sends when this electromagnetic wave signal input media 112 has been the signal (as pulse signal) of an intensity or frequency change, this electromagnetic wave signal 120 need not modulation, is passed to this sounding component 114 and can realizes sounding.
Adopt carbon nano tube structure as sounding component 114 in embodiment of the present invention sound-producing device, due to carbon nano-tube to electromagnetic absorption near absolute black body, thereby make sounding component 114 have the absorption characteristic of homogeneous for the electromagnetic wave of various wavelength.In addition, carbon nano tube structure has less unit area thermal capacitance (the unit area thermal capacitance of this carbon nano-tube film is less than 2 * 10
-4Every square centimeter of Kelvin of joule, preferably, less than 1 * 10
-4Joule every square centimeter of Kelvin) and larger cooling surface area.Therefore, when the carbon nano-tube in sounding component 114 was subject to as electromagnetic irradiations such as laser, carbon nano-tube was stimulated because absorbing luminous 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 heat interchange rapidly with ambient air or other media.If the electromagnetic wave of irradiation is through periodic intensity modulated, produce periodic temperature variation in carbon nano-tube, thereby make gas or liquid medium around it also produce periodic temperature variation, cause ambient gas or liquid medium expand rapidly and shrink, thereby sound, i.e. conversion by " electromagnetic wave-Re-sound " realizes a thermic sounding.Further, in the present embodiment, described sounding component 114 comprises the carbon nano tube structure that is comprised of a large amount of carbon nano-tube, frequency and the intensity of the electromagnetic wave signal 120 that therefore sends when electromagnetic wave signal input media 118 are 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 ultrasound wave.
See also Fig. 9, second embodiment of the invention 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 framed structure, rod-like 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 media 212 and interval corresponding with this sounding component 214 arranges.This modulating device 218 is arranged between this electromagnetic wave signal input media 212 and sounding component 214.
The structure of the sound-producing device 10 in this sound-producing device 20 and the first embodiment is substantially similar, be with the difference of sound-producing device 10 in 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 sends is reflected 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 100 microns～1 meter.Being appreciated that this holds together sound structure 222 can be for having the various structures on a larger surface, 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.This material that holds together sound structure 222 is wooden, plastics, metal or glass etc.In addition, see also Figure 10, this holds together the integral body that sound structure 222 and this supporting construction also can be an integrated setting, as a cavity with narrow openings 226, this sounding component 214 is tiled on this opening that holds together sound structure 222 226, has a helmholtz resonance chamber thereby make this hold together sound structure 222.This sounding component 214 is fixing by holding together sound structure 222, and the unsettled setting of part.
See also Figure 11 and Figure 12, third embodiment of the invention provides a kind of sound-producing device 30, and this sound-producing device 30 comprises an electromagnetic wave signal input media 312, a sounding component 314 and a supporting construction 316.This supporting construction 316 is a framed structure, and this sounding component 314 supports by this framed structure, and the unsettled setting of part.
The sound-producing device 30 of the 3rd embodiment and the sound-producing device 10 of the first embodiment are basic identical, and its difference is, this electromagnetic wave signal input media 312 comprises a modulation circuit 330.This modulation circuit 330 is electrically connected to an electric signaling device 340, and controls the intensity of the electromagnetic wave signal that this electromagnetic wave signal input media 312 sends and/or the variation of frequency according to the audio electrical signal of this electric signaling device 340 inputs.
This signal input apparatus 312 can comprise one or more ordinary light sources 320.The overhanging portion of this sounding component 314 is over against this ordinary light source 320, and contacts with this ordinary light source 320 or the interval arranges.When 314 and 320 intervals arranged, the distance between this ordinary light source 320 and this sounding component 314 was not limit, but should guarantee that the luminous energy of sufficient intensity gets at the carbon nano tube structure surface that reaches as sounding component 314.Preferably, between this ordinary light source 320 and this sounding component 314 interval less than 1 centimetre.In the present embodiment, between this ordinary light source 320 and this sounding component 314, the interval is 5 millimeters.This modulation circuit 330 is electrically connected to this ordinary light source 320.This modulation circuit 330 is used for receiving the audio electrical signal of inputting from an external electric signaling device 340, and controls luminous intensity or the frequency of this ordinary light source 320 according to the variation of this audio electrical signal frequency.Particularly, this modulation circuit 330 can be by realizing the control to these ordinary light source 320 luminous intensities according to the switch of this ordinary light source 320 of frequency control of this audio electrical signal.In the present embodiment, this ordinary light source 320 is a light emitting diode, and the rated voltage of this light emitting diode is 3.4 volts～3.6 volts, and rated current is 360 milliamperes, and rated power is 1.1 watts, and light efficiency is 65 lumens/watt, and working temperature is less than 65 degree.The quantity of this light emitting diode is not limit, and is 16 in the present embodiment.This electric signaling device 340 can be audio player, as a MP3 player.Be appreciated that this signal input apparatus 312 also can comprise this electric signaling device 340.
This sound-producing device 30 is when work, and the carbon nano tube structure in described sounding component 314 absorbs the light that above-mentioned ordinary light source 320 sends, and is heat energy with transform light energy, adds hot-air by above-mentioned thermic principle of sound and sends sound wave.The thickness that is appreciated that this sounding component 314 is larger, and the ability that absorbs luminous energy is better, and the intensity of sound of sending is larger, therefore should guaranteeing to have under the prerequisite of enough little unit area thermal capacitance, improve the thickness of this sounding component 314 as far as possible.
In the embodiment of the present invention, the frequency range of described sounding component sounding is 1 hertz to 100,000 hertz.When the thinner thickness of the carbon nano-tube ordered arrangement in the carbon nano tube structure in sounding component and carbon nano tube structure, intensity of phonation just can reach 70 dB sound pressure levels (dBSPL).When the thickness of this carbon nano tube structure increased, intensity of phonation can further strengthen.In addition, carbon nano tube structure in the embodiment of the present invention has toughness and physical strength preferably, utilize described carbon nano tube structure can make easily the sounding component of various shape and size, this sounding component can be conveniently used in various musical instrumentses, in the electronic applications such as sound equipment, mobile phone, MP3, MP4, TV, computing machine and other sound-producing device.This sounding component can fit in a matrix, as a display, mobile phone, computer, TV, sound equipment, door, window, screen, furniture or the vehicles.
Transfer voice has a lot of restrictive conditions, passes through air or other medium as needs, and works as strong with the variation decling phase of distance.Due to electromagnetic wave, especially laser, long-distance communications in a vacuum, such as the propagation in cosmic space, the propagation of long distance, and quite little in the transmitting procedure loss, so this sound-producing device can be for the distant signal transmission field, for example light intensity and the frequency of laser are modulated, by the required voice signal of Laser shock loading, transfer to carbon nano tube structure and sound, thereby realize voice signal by electromagnetic form long-distance transmissions.Further, because above-mentioned sounding component gets final product sounding by electromagnetic wave irradiation, therefore, this sounding component can be one without electricity, without the extreme environment work of magnetic.
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 only is comprised of carbon nano tube structure, need not other labyrinths such as magnet, therefore 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 structure can be by input one electromagnetic wave signal sounding, therefore, this sounding component can be worked without under electrical environment one.They are three years old, this sound-producing device utilizes input signal to cause this carbon nano tube structure temperature variation, thereby make its ambient gas or liquid medium expand rapidly and shrink, and then send sound wave, therefore the sound-producing device that this carbon nano tube structure forms can be worked under the condition without magnetic.They are four years old, because this carbon nano tube structure has less thermal capacitance and larger specific surface area, therefore this carbon nano tube structure has the characteristics rapid, that thermo-lag is little, rate of heat exchange is fast that heat up, therefore the sound-producing device that this carbon nano tube structure forms can send the very interior sound (1Hz-100kHz) of broad spectrum, and has sounding effect preferably.They are five years old, because carbon nano-tube has physical strength and toughness preferably, therefore the carbon nano tube structure that is comprised of carbon nano-tube has physical strength and toughness preferably, durability is better, thereby be conducive to prepare the various shapes that formed by carbon nano tube structure, the sound-producing device of size, and then be conveniently used in various fields.They are six years old, when this carbon nano tube structure Thickness Ratio hour, for example less than 10 microns, this carbon nano tube structure has higher transparency, therefore adopting the sounding component of this carbon nano tube structure is the transparent sound production element, can directly be arranged at the upper surface of a display device or oil painting, save the space-efficient purpose thereby reach.Its seven, described sound-producing device can further comprise holding together the sound structure, 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 is within all should being included in the present invention's scope required for protection.
Claims (24)
1. sound-producing device, it comprises:
One electromagnetic wave signal input media; And
One sounding component;
it is characterized in that, this sounding component comprises a carbon nano tube structure, this carbon nano tube structure comprises a large amount of carbon nano-tube, these a large amount of carbon nano-tube attract each other by Van der Waals force, thereby making this carbon nano tube structure is self supporting structure, this carbon nano tube structure has larger specific surface area and contacts with ambient gas or liquid medium, this electromagnetic wave signal input media transmits electromagnetic wave signal to this carbon nano tube structure, make this carbon nano tube structure by absorbing this electromagnetic wave signal heating and carrying out heat interchange with this ambient gas or liquid medium, thereby this ambient gas of intermittent-heating or liquid medium, thereby make gas or liquid medium expand and shrink and send sound wave because density changes, this sound wave can reach people's ear can listen intensity.
2. sound-producing device as claimed in claim 1, is characterized in that, described carbon nano tube structure is layer structure, and its thickness is 0.5 nanometer ~ 1 millimeter.
3. sound-producing device as claimed in claim 1, is characterized in that, described carbon nano tube structure is linear structure, and its diameter is 0.5 nanometer ~ 100 micron.
4. sound-producing device as claimed in claim 1, is characterized in that, described carbon nano tube structure comprises the composite structure that at least one carbon nano-tube film, at least one liner structure of carbon nano tube or its combination in any form.
5. sound-producing device as claimed in claim 1, is characterized in that, described carbon nano tube structure comprises equally distributed carbon nano-tube.
6. sound-producing device as claimed in claim 5, it is characterized in that, carbon nano-tube in described carbon nano tube structure 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 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.
7. sound-producing device as claimed in claim 1, is characterized in that, the unit area thermal capacitance of described carbon nano tube structure is less than 2 * 10
-4Every square centimeter of Kelvin of joule.
8. sound-producing device as claimed in claim 1, is characterized in that, the specific surface area of this carbon nano tube structure is greater than 100 square metres of every grams.
9. sound-producing device as claimed in claim 1, is characterized in that, described electromagnetic wave signal is one or more in radiowave, infrared ray, visible light, ultraviolet ray, microwave, X ray and gamma-rays.
10. sound-producing device as claimed in claim 1, it is characterized in that, described electromagnetic wave signal input media comprises an optical signal source, and described electromagnetic wave signal input media sends light signal by this optical signal source, and the wavelength coverage of this light signal is between ultraviolet region to far infrared region.
11. sound-producing device as claimed in claim 10 is characterized in that, described optical signal source is a pulse laser generator.
12. sound-producing device as claimed in claim 10, it is characterized in that, described electromagnetic wave signal input media comprises an optical fiber, and this optical fiber one end is connected with described optical signal source, the other end extends near described carbon nano tube structure, and described light signal is handed to described carbon nano tube structure by optical fiber transmission.
13. 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 media and 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.
14. 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
15. 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.
16. sound-producing device as claimed in claim 15 is characterized in that, the material of described supporting construction is hard material or flexible material.
17. sound-producing device as claimed in claim 16 is characterized in that, the material of described supporting construction is adamas, glass, quartz, plastics, resin, wood materials or paper material.
18. sound-producing device as claimed in claim 15 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.
19. sound-producing device as claimed in claim 15 is characterized in that, described supporting construction is a framed structure, rod-like structure or irregularly shaped structure, and described sounding component is by the unsettled setting of this supporting construction part.
20. sound-producing device as claimed in claim 19 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 media, and interval relative with described sounding component arranges.
21. 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 fixing and unsettled setting of part of sound structure by this.
22. sounding component, it comprises a carbon nano tube structure, this carbon nano tube structure comprises a large amount of carbon nano-tube, these a large amount of carbon nano-tube attract each other by Van der Waals force, thereby making this carbon nano tube structure is self supporting structure, this carbon nano tube structure has larger specific surface area and contacts with ambient gas or liquid medium, by absorbing an electromagnetic wave signal and heating and carrying out heat interchange with this ambient gas or liquid medium, thereby this ambient gas of intermittent-heating or liquid medium, thereby make gas or liquid medium expand and shrink and send sound wave because density changes, this sound wave can reach people's ear can listen intensity.
23. a sound-producing device, it comprises:
one carbon nano tube structure, this carbon nano tube structure comprises a large amount of carbon nano-tube, these a large amount of carbon nano-tube attract each other by Van der Waals force, thereby making this carbon nano tube structure is self supporting structure, this carbon nano tube structure has larger specific surface area and contacts with ambient gas or liquid medium, by absorbing an electromagnetic wave signal heating and carrying out heat interchange with this ambient gas or liquid medium, thereby this ambient gas of intermittent-heating or liquid medium, thereby make gas or liquid medium expand and shrink and send sound wave because density changes, this sound wave can reach people's ear can listen intensity, and
One matrix, this carbon nano tube structure is arranged at this matrix surface,
Wherein, this matrix is display, mobile phone, computer, TV, sound equipment, door, window, screen, furniture or the vehicles.
24. a sound-producing device, it comprises:
One or more ordinary light sources;
one carbon nano tube structure, this carbon nano tube structure comprises a large amount of carbon nano-tube, these a large amount of carbon nano-tube attract each other by Van der Waals force, thereby making this carbon nano tube structure is self supporting structure, this carbon nano tube structure has larger specific surface area and contacts with ambient gas or liquid medium, generate heat and carry out heat interchange with this ambient gas or liquid medium by absorbing the light that this ordinary light source sends, thereby this ambient gas of intermittent-heating or liquid medium, thereby make gas or liquid medium expand and shrink and send sound wave because density changes, this sound wave can reach people's ear can listen intensity,
And
One modulation circuit is electrically connected to this ordinary light source, controls the variation of intensity or the frequency of this ordinary light source by the audio electrical signal of input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910147484 CN101599268B (en) | 2008-06-04 | 2009-06-04 | Sound-producing device and sound-producing element |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810067583 | 2008-06-04 | ||
| CN200810067583.4 | 2008-06-04 | ||
| CN 200910147484 CN101599268B (en) | 2008-06-04 | 2009-06-04 | Sound-producing device and sound-producing element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101599268A CN101599268A (en) | 2009-12-09 |
| CN101599268B true CN101599268B (en) | 2013-06-05 |
Family
ID=41466869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910147484 Active CN101599268B (en) | 2008-06-04 | 2009-06-04 | Sound-producing device and sound-producing element |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4555384B2 (en) |
| CN (1) | CN101599268B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101605290B (en) * | 2008-06-13 | 2013-02-13 | 清华大学 | Sounding device |
| CN101605289B (en) * | 2008-06-13 | 2013-07-03 | 清华大学 | Sounding device |
| EP2138998B1 (en) * | 2008-06-04 | 2019-11-06 | Tsing Hua University | Thermoacoustic device comprising a carbon nanotube structure |
| CN101605291B (en) * | 2008-06-13 | 2013-07-31 | 清华大学 | Sound transmission system |
| CN101944407A (en) * | 2009-07-07 | 2011-01-12 | 群康科技(深圳)有限公司 | Conducting plate and manufacturing method thereof |
| CN102307325B (en) * | 2011-07-21 | 2014-04-16 | 清华大学 | Thermophone device |
| JP6272886B2 (en) * | 2012-10-26 | 2018-01-31 | コーニング インコーポレイテッド | Structure with integrated acoustic function |
| CN105246010A (en) * | 2015-11-02 | 2016-01-13 | 李崇 | Film speaker having low sound improving effect |
| CN105228065A (en) * | 2015-11-02 | 2016-01-06 | 李崇 | There is the wafer speaker of good acoustical quality |
| CN108736964B (en) * | 2017-04-20 | 2020-08-11 | 清华大学 | Terahertz wave communication device |
| US10727431B2 (en) * | 2018-06-29 | 2020-07-28 | International Business Machines Corporation | Optoelectronic devices based on intrinsic plasmon-exciton polaritons |
| EP3859307A1 (en) * | 2020-01-28 | 2021-08-04 | Infineon Technologies AG | Light emitting structure, photo-acoustic spectroscopy sensing device, method for operating a photo-acoustic spectroscopy sensing device and apparatus for obtaining an information about a target gas |
| CN113676797B (en) * | 2021-08-25 | 2024-03-01 | 福州京东方光电科技有限公司 | Sound generating device and display system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2425468Y (en) * | 2000-06-09 | 2001-03-28 | 东莞市以态电子有限公司 | Plate speaker |
| US6803116B2 (en) * | 2000-08-09 | 2004-10-12 | Murata Manufacturing Co., Ltd. | Method of bonding a conductive adhesive and an electrode, and a bonded electrode obtained thereby |
| CN2787870Y (en) * | 2005-02-28 | 2006-06-14 | 中国科学院理化技术研究所 | Micro/nano thermoacoustic engine based on thermoacoustic conversion |
| 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 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPP976499A0 (en) * | 1999-04-16 | 1999-05-06 | Commonwealth Scientific And Industrial Research Organisation | Multilayer carbon nanotube films |
| AUPQ065099A0 (en) * | 1999-05-28 | 1999-06-24 | Commonwealth Scientific And Industrial Research Organisation | Substrate-supported aligned carbon nanotube films |
| JP2003198281A (en) * | 2001-12-27 | 2003-07-11 | Taiko Denki Co Ltd | Audio signal amplifier |
| JP2004229250A (en) * | 2003-01-21 | 2004-08-12 | Koichi Nakagawa | Pwm signal interface system |
| JP2005189322A (en) * | 2003-12-24 | 2005-07-14 | Sharp Corp | Image forming apparatus |
| CN1960943B (en) * | 2004-04-19 | 2013-01-02 | 独立行政法人科学技术振兴机构 | Carbon-based fine structure group, aggregate of carbon based fine structure, use thereof and method for preparation thereof |
| JP2005333601A (en) * | 2004-05-20 | 2005-12-02 | Norimoto Sato | Negative feedback amplifier driving loudspeaker unit |
| JP5350635B2 (en) * | 2004-11-09 | 2013-11-27 | ボード・オブ・リージエンツ，ザ・ユニバーシテイ・オブ・テキサス・システム | Production and application of nanofiber ribbons and sheets and nanofiber twisted and untwisted yarns |
| CN100337981C (en) * | 2005-03-24 | 2007-09-19 | 清华大学 | Thermal interface material and its production method |
| CN101273661B (en) * | 2005-10-26 | 2011-10-05 | 松下电工株式会社 | Pressure wave generator and production method therefor |
| JP4968854B2 (en) * | 2006-02-28 | 2012-07-04 | 東洋紡績株式会社 | Carbon nanotube aggregate, carbon nanotube fiber, and method for producing carbon nanotube fiber |
| WO2007110899A1 (en) * | 2006-03-24 | 2007-10-04 | Fujitsu Limited | Device structure of carbon fiber and process for producing the same |
-
2009
- 2009-06-04 JP JP2009135411A patent/JP4555384B2/en active Active
- 2009-06-04 CN CN 200910147484 patent/CN101599268B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2425468Y (en) * | 2000-06-09 | 2001-03-28 | 东莞市以态电子有限公司 | Plate speaker |
| US6803116B2 (en) * | 2000-08-09 | 2004-10-12 | Murata Manufacturing Co., Ltd. | Method of bonding a conductive adhesive and an electrode, and a bonded electrode obtained thereby |
| 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 |
| CN2787870Y (en) * | 2005-02-28 | 2006-06-14 | 中国科学院理化技术研究所 | Micro/nano thermoacoustic engine based on thermoacoustic conversion |
Non-Patent Citations (3)
| Title |
|---|
| H.D.ARNOLD,I.B.CRANDALL，.The Thermophone as a Precision Source of Sound.《Physical Review》.The American Physical Society,1917,第10卷22-38. * |
| I.-Yin Sandy Lee等,.Photosensitization of nonlinear scattering and photoacoustic emission from single-walled carbon nanotubes.《Applied Physics Letters》.2008,第92卷(第10期), * |
| Lin Xiao等，.Flexible,Stretchable,Transparent Carbon Nanotube Thin Film Loudspeakers.《NANO LETTERS》.2008,第8卷(第12期), * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101599268A (en) | 2009-12-09 |
| JP2009296594A (en) | 2009-12-17 |
| JP4555384B2 (en) | 2010-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101599268B (en) | Sound-producing device and sound-producing element | |
| CN101605292B (en) | Sounding device and sounding component | |
| EP2138998B1 (en) | Thermoacoustic device comprising a carbon nanotube structure | |
| US8059841B2 (en) | Thermoacoustic device | |
| CN101656907B (en) | Sound box | |
| TW201002097A (en) | Acoustic device | |
| CN101605289B (en) | Sounding device | |
| CN101605291B (en) | Sound transmission system | |
| CN101605290B (en) | Sounding device | |
| CN102769814B (en) | Sounding device | |
| TWI385938B (en) | Acoustic transmitting system | |
| CN101610442B (en) | Sounding device | |
| TWI353584B (en) | Acoustic device | |
| TWI356395B (en) | Acoustic device | |
| CN101610444A (en) | sound-producing device | |
| CN101610445A (en) | sound-producing device | |
| TWI356397B (en) | Acoustic device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |