CN109660924A - Active carbon sound-absorbing particle and sounding device - Google Patents
Active carbon sound-absorbing particle and sounding device Download PDFInfo
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- CN109660924A CN109660924A CN201811446666.4A CN201811446666A CN109660924A CN 109660924 A CN109660924 A CN 109660924A CN 201811446666 A CN201811446666 A CN 201811446666A CN 109660924 A CN109660924 A CN 109660924A
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- activated carbon
- absorbing particle
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
- H04R2400/11—Aspects regarding the frame of loudspeaker transducers
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Carbon And Carbon Compounds (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses a kind of active carbon sound-absorbing particle and sounding devices.The active carbon sound-absorbing particle is mixed using unformed activated carbon particles with high molecular polymer bonding agent, the active carbon sound-absorbing material includes carbon, hydrogen, three kinds of elements of oxygen, the unformed activated carbon particles contain the Turbostratic formed by the random accumulation of molecular fragment of two-dimentional graphite linings structure and/or three-dimensional graphite crystallite, there is loose cellular structure in the unformed activated carbon particles, the cellular structure includes nanoscale micropore and mesoporous, the particle size range of the active carbon sound-absorbing particle is 50-1000 microns, the particle size range of the unformed activated carbon particles is 0.1-100 microns.Of the invention one has technical effect that the active carbon sound-absorbing particle can be used for reducing the resonance frequency of sounding device.
Description
Technical field
The present invention relates to technical field of acoustics, in particular it relates to a kind of active carbon sound-absorbing particle and sounding device.
Background technique
Carry out quickly growing for consumer electronics product this year, the electronic products such as mobile phone, tablet computer, earphone are wide by consumer
It is general to be applied to every field.With the gradually development of the relevant technologies, consumer is also higher and higher to the performance requirement of electronic product.
Technical staff improves each component of electronic product, to meet the needs of property development.
Sounding device is acoustical device important in electronic product, is used to convert the electrical signal to voice signal.Sounding
The resonance frequency of device is important acoustical behavior index, and the resonance frequency for reducing sounding device helps to improve sounding device
Acoustic efficiency.
Resonance frequency refers to that sounding device gradually rises vibration frequency from bass domain, when oscillation intensity reaches most strong vibration, or
Person measures the impedance operator of sounding device, and when impedance value reaches maximum value for the first time, corresponding vibration frequency is known as the loudspeaking
The resonance frequency or resonant frequency of device unit, i.e. f0。
How the resonance frequency of sounding device is reduced to improve acoustical behavior, and one for becoming those skilled in the art is main
Research direction.
Summary of the invention
It is an object of the present invention to provide a kind of new solutions of resonance frequency for reducing sounding device.
According to the first aspect of the invention, a kind of active carbon sound-absorbing particle is provided, the active carbon sound-absorbing particle uses
Unformed activated carbon particles are mixed with high molecular polymer bonding agent, and the active carbon sound-absorbing material includes carbon, hydrogen, oxygen three
Kind of element, the unformed activated carbon particles contain by the molecular fragment of two-dimentional graphite linings structure and/or three-dimensional graphite crystallite without
Rule accumulates the Turbostratic formed, has loose cellular structure, the duct knot in the unformed activated carbon particles
Structure includes nanoscale micropore and mesoporous, and the particle size range of the active carbon sound-absorbing particle is 50-1000 microns, described unformed
The particle size range of activated carbon particles is 0.1-100 microns.
Optionally, the carbon quality accounting in the unformed activated carbon particles is greater than or equal to 60wt%, the nothing
Carbon oxygen mass ratio in activated carbon particles of being formed is greater than or equal to 3.
Optionally, the carbon quality accounting in the unformed activated carbon particles is greater than or equal to 60wt%, the nothing
Carbon-hydrogen ratio in activated carbon particles of being formed is greater than or equal to 11.
Optionally, the particle size range of the active carbon sound-absorbing particle is 100-450 microns, the unformed activated carbon particles
Particle size range be 0.2-20 microns.
Optionally, the cellular structure micropore and mesoporous, the pore diameter range of the micropore is 0.5-2 nanometers, described mesoporous
Pore diameter range be 2-3.5 nanometers.
Optionally, the accumulation pore volume range of the unformed activated carbon particles is 0.6-5cm3/g。
Optionally, the high molecular polymer bonding agent includes polyacrylic, polyvinyl alcohol, polystyrene type, gathers
At least one of urethane class, polyvinyl acetate, polybutadiene rubber bonding agent, the polymeric adhesive is in the work
Property charcoal sound-absorbing particle in quality accounting range be 1-10wt%.
Optionally, the unformed activated carbon particles include hydrophobic amorphous activated carbon particles.
Optionally, the bulk density of the unformed activated carbon particles is 0.05-0.8g/cm3。
The present invention also provides a kind of sounding devices, comprising:
Shell is formed with accommodating chamber in the shell；
Vibration component, the vibration component are disposed in the housing；
Above-mentioned active carbon sound-absorbing particle is provided in the accommodating chamber.
According to one embodiment of the disclosure, active carbon sound-absorbing particle can be used for reducing the resonance frequency of sounding device.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
It is combined in the description and the attached drawing for constituting part of specification shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 is the carbon-to-oxygen ratio and structure feature and resonance frequency reducing effect of active carbon sound-absorbing material provided by the invention
Contrast table；
Fig. 2 is the vibration frequency of the active carbon sound-absorbing material of different carbon-to-oxygen ratios provided by the invention and the curve of electrical impedance
Figure；
Fig. 3 be active carbon sound-absorbing material provided by the invention carbon-to-oxygen ratio be 9 when accumulate pore volume curve graph；
Fig. 4 is the partial size of unformed active carbon particle provided by the invention and the contrast table of resonance frequency reducing effect；
Fig. 5 is the vibration frequency of the unformed active carbon carbon particle of different-grain diameter provided by the invention and the curve of electrical impedance
Figure.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should also be noted that unless in addition having
Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention
And its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
The present invention provides a kind of active carbon sound-absorbing material, the active carbon sound-absorbing material contain two-dimentional graphite linings and/or
Three-dimensional graphite crystallite, being accumulated by graphite linings and crystallite has loose cellular structure inside the active carbon sound-absorbing material formed.Institute
It includes nanoscale micropore and mesoporous for stating cellular structure.The mesoporous aperture is greater than the aperture of micropore.Active carbon sound-absorbing material
In cellular structure active carbon sound-absorbing material can be made to generate the effect that quickly absorbs and releases to air.Carbon therein is used
In offer support, and then form frame, cellular structure.
By verifying of the invention, active carbon sound-absorbing material is put into the cabinet of sounding device, by air
Release action is absorbed, the volume for expanding cabinet can be equivalent to, makes a times of volume enlargement of chamber, a is greater than 1.
The resonance frequency f of sounding device unit0It can be indicated with following equation:
In above equation, MmsIt is the quality of sounding device unit, CmsIt is the equivalent compliance of sounding device unit.
After in the cabinet that sounding device unit is assemblied in sounding device, the resonance frequency f of sounding device01It can be to
Lower equation indicates:
In above equation, CmsIt is the air compliance of the tank-volumes of sounding device.
And in the cabinet that active carbon sound-absorbing particle is put into sounding device after, the resonance frequency f of sounding device at this time02With
Following equation indicates:
As described above, the volume of cabinet expands a times (a > 1) by active carbon sound-absorbing material is equivalent, it is seen that f02Less than f01。
In the cabinet of sounding device, the forced vibration of particle can consume the energy of sound wave, and this equivalent is in case
Air compliance in the volume of body increases, to reduce resonance frequency f02。
Active carbon sound-absorbing material provided by the invention can be used in the sounding devices such as earphone, earpiece, loudspeaker, speaker.
For example, active carbon sound-absorbing material is put into the rear operatic tunes of sounding device, the volume of the operatic tunes after virtual enlargement, to reduce sounding
The resonance frequency of device.And then achieve the effect that the acoustical behavior for improving sounding device.
In a kind of optional embodiment, the carbon quality accounting in the active carbon sound-absorbing material is greater than or equal to
60wt%.Carbon oxygen mass ratio in the active carbon sound-absorbing material is greater than or equal to 3.Carbon rises in active carbon sound-absorbing material
To the effect for forming frame, constructing cellular structure.The present inventor preferably configures carbon oxygen mass ratio to greatly by developing
In 3.If carbon oxygen mass ratio is too low, it is excessively lax to will cause the cellular structure formed in active carbon sound-absorbing material, in turn results in
The aperture of cellular structure becomes larger.The aperture of cellular structure will cause active carbon sound-absorbing material accumulation pore volume after becoming larger becomes smaller,
It absorbs, the ability of air reduces.This phenomenon will cause active carbon sound-absorbing material to the equivalent volume of the cabinet of sounding device
Expanding multiplying power reduces, and in turn resulting in reduces resonance frequency f0Decreased effectiveness.Accordingly, it is preferred that carbon oxygen mass ratio is greater than 3.
The carbon oxygen mass ratio is preferably greater than 5.When carbon oxygen mass ratio meets above range, the effect of resonance frequency is reduced
It is best.At this point, the channel diameter of the cellular structure is smaller, it is more advantageous to and realizes that the quick of air absorbs and releases effect.?
In a specific embodiment of the invention, the carbon oxygen mass ratio can be 3,5,15,20.
In another optional embodiment, the carbon quality accounting in the active carbon sound-absorbing material is greater than or waits
In 60wt%.Carbon-hydrogen ratio in the active carbon sound-absorbing material is greater than or equal to 11.Optionally, the active carbon sound absorber
Material is by being carbonized at high temperature to mineral-type material, plant material, synthetic material etc..According to the difference of carbonization technique,
The specific gravity of the raw material of active carbon sound-absorbing material internal residual is different.And carbon-hydrogen ratio is smaller, remaining raw material it is other
The percent mass of impurity is smaller.Correspondingly, the cellular structure of material internal is more perfect, and the accumulation pore volume of cellular structure is bigger,
It is better to the adsorption capacity of air.
Preferably, the C/Hratio is greater than 13.Within the above range, the reduction resonance frequency that active carbon sound-absorbing material is shown
The effect of rate is optimal.For example, the active carbon sound-absorbing material that carbon-hydrogen ratio is 10,11,13 and 20, accumulation pore volume are respectively
0.37g/cm3、0.45g/cm3、0.62g/cm3And 0.81g/cm3, in the active carbon sound-absorbing material with phase homogenous quantities, resonance
Frequency f0Reducing effect it is optimal.
For the cellular structure, the micropore is mainly used for absorbing, accommodates air molecule, and mesoporous in addition to that can accommodate
Air molecule also acts the effect that air molecule can be allowed quickly to be in and out of micropore, so that active carbon sound-absorbing material has
There is good air pressure change responding ability.Fig. 1,2 show micropore, mesoporous, tired using different carbon oxygen mass ratioes as Variable Factors
Product pore volume, resonance frequency f0Reducing effect situation of change.From Figure 2 it can be seen that impedance first increases as vibration frequency increases
It reduces again, frequency when impedance reaches maximum value is resonance frequency (f0).With the increase of carbon oxygen mass ratio, resonance frequency
f0It is gradually reduced, shows that carbon oxygen mass ratio is higher, active carbon sound-absorbing material has the effect of preferably reducing resonance frequency.Fig. 3
When for carbon oxygen mass ratio being 15, the curve graph of pore volume is accumulated.As shown in figure 3 by the solid lines, micropore size is distributed mainly on 0.7-
Between the range of 1.3nm, and micropore accumulation pore volume of its aperture under 2nm is 0.53ml/g, and mesoporous pore size mainly divides
It is distributed between the range of 2-3.5nm, and it is 0.83ml/g that its total accumulation pore volume, which is held,.
Preferably, the 60-65% of the total mesoporous content of mesoporous Zhan of the aperture within the scope of 2-3.5nm.When a large amount of mesoporous holes
When diameter is concentrated in relatively narrow range, mesoporous duct degree of perfection is higher, and the trend risen is presented in accumulation pore volume, to sky
The adsorption-desorption effect of gas is more preferable.Active carbon sound-absorbing material can embody more preferably equivalent capacity enlargement effect as a result,.Preferred
Embodiment in, aperture and then reaches above-mentioned promotion adsorption/desorption in the mesoporous 60-65% for total mesoporous amount of 2-3.5nm
The effect of performance.If a large amount of mesoporous apertures concentrate in the pore diameter range greater than 5nm, due to mesoporous between micropore
Aperture difference is larger, causes the mesoporous connection between micropore unsmooth.In turn result in air molecule disengaging micropore and mesoporous
In the resistance that is subject to when quickly flowing increase, influence the acoustical behavior of active carbon sound-absorbing material.
Preferably, the active carbon sound-absorbing material is configured as being greater than or equal to 0.05mmol/g to the adsorbance of nitrogen.
To guarantee that active carbon sound-absorbing material has enough absorption and desorption performance to air, to meet the need of equivalent dilatation cavity space
It wants.
For the two kinds of structures of two-dimentional graphite linings and/or three-dimensional graphite crystallite contained in absorbent charcoal material, mainly influence
Cellular structure formed in material.The content of above two structure in the material is more, and material passes through the processing of carbonization technique
After process, the cellular structure of formation is more uniform, cellular structure aperture is smaller, so that active carbon sound-absorbing material can generate
The good effect for reducing resonance frequency.
Optionally, the active carbon sound-absorbing material can be made of unformed activated carbon particles.Unformed activated carbon grain
Son contains accumulates the random layer knot formed by the molecular fragment of two-dimentional graphite linings and/or three-dimensional graphite crystallite in the form of random
Structure.There are a large amount of irregular keys on the edge of two-dimentional graphite linings structure and three-dimensional graphite crystallite.Irregular bond energy is enough two
It ties up and forms close connection between graphite linings structure and three-dimensional graphite crystallite, intertexture forms cellular structure.The valence electron of carbon has sp2
Hybridized orbit and sp3Hybridized orbit, and then form hexagonal carbon network plane.By it is this it is random in the form of accumulate the active carbon to be formed
Particle is capable of forming cellular structure fine and closely woven, abundant, to meet active carbon sound-absorbing material to the structural requirement of cellular structure.
Preferably, the partial size of above-mentioned two-dimentional graphite linings and three-dimensional graphite crystallite is less than 30 nanometers.If two-dimentional graphite linings and three
The partial size for tieing up graphite microcrystal within the above range, can preferably form uniform, fine and closely woven cellular structure after random accumulation.One
Aspect is more advantageous to active carbon sound-absorbing material and plays the performance for absorbing, discharging air.On the other hand, it can be improved unformed activity
The structural homogeneity and stability of charcoal particle improve the structural strength of product made by active carbon sound-absorbing material.
Optionally, the unformed activated carbon particles itself can spherical in shape, spherical, piece shape, one in rod-like structure
Kind is a variety of.For example, being capable of forming more between carbon particle after bonding forms active carbon sound-absorbing particle using spherical carbon particle
Uniformly, finer and closely woven cellular structure, and then improve the acoustical behavior of active carbon sound-absorbing particle.It can be improved using piece shape carbon particle
The structural stability of active carbon sound-absorbing particle has reduced powder, damaged risk.Simultaneously because the unformed activated carbon particles carbon of piece shape
Change simple process, cost is relatively low, therefore from the preferred unformed activated carbon particles of piece shape of industrial application angle.
Optionally, the particle size range of the unformed activated carbon particles is 0.1-100 microns.Unformed activated carbon particles
Partial size influences whether that the bulk density of its own, the size of bulk density then influence whether to absorb the performance of the performance of air.
If the partial size of unformed activated carbon particles is too small, it will cause bulk densities to significantly increase.In certain volume
Under, the quality for the unformed activated carbon particles that can be filled is opposite to be reduced, and the impaired performance for reducing resonance frequency is caused.And such as
The partial size of the unformed activated carbon particles of fruit is excessive, and it will cause bulk densities to be substantially reduced.Under certain volume, excessive heap
The energy that product density will lead to the sound wave consumed when the particle forced vibration in space is reduced, and the cabinet for being equivalent to sounding device holds
Air compliance (C in productma) reduce, it will also result in the impaired performance for reducing resonance frequency.
Preferably, the particle size range of the unformed activated carbon particles is 0.2-20 microns, made within the scope of this
Active carbon sound-absorbing particle can show good reduction resonance frequency f0Effect.
Correspondingly, the optional range of the bulk density of unformed activated carbon particles is 0.15-0.8g/cm3, it is preferable that it is described
Bulk density is 0.25-0.55g/cm3.The size of bulk density can also be contained by the shape of unformed activated carbon particles, carbon
The factors such as amount are adjusted.
When Fig. 4, the partial size for showing unformed activated carbon particles in 5 are respectively 0.05,1,15,30 micron, bulk density
And resonance frequency f0Reduction degree.As shown in figure 4, when the partial size of unformed activated carbon particles is 1 and 15 micron, heap
Product density shows as 0.51g/cm3And 0.33g/cm3, while the resonance frequency f shown0Reduced degree be 169Hz and
175Hz.As shown in figure 5, impedance first increases to be reduced afterwards as vibration frequency increases.As particle size increases, to f0Drop
Inefficient fruit, which is presented, first increases the trend reduced afterwards.As it can be seen that when partial size is excessive or too small, resonance frequency f0Reduced degree all phases
It should reduce.
Particularly, for it is having in unformed activated carbon particles, including micropore and mesoporous cellular structure, the micropore
Pore diameter range be 0.5-2 nanometers, the aperture of wherein most micropore is between 0.7-1.3 nanometers.The mesoporous aperture model
Enclose is 2-20 nanometers, it is preferable that the mesoporous aperture of wherein most is between 2-3.5 nanometers.
In unformed activated carbon particles, the aperture of micropore is limited in lesser size, so that can include in particle
Sufficiently, largely micropore, one side increase the overall aggregate pore volume of particle, particle on the other hand can be improved to air molecule
Adsorption capacity.The tiny micropore in a large amount of apertures can adsorb large quantity of air molecule, improve made active carbon sound-absorbing particle
Acoustical behavior.And within the above range by mesoporous pore diameter range limitation, it is micro- in order to need quickly to suck in air molecule
Hole or when quickly being discharged from micropore, it is mesoporous that air molecule is given to provide enough flowing spaces, keep air molecule quick
It is mobile, reduce the situation in air bound and micropore.On the other hand, if mesoporous aperture is excessive, unformed activity can be reduced
The accumulation pore volume of charcoal particle, the performance decline for the absorption air for causing particle whole.
Preferably, the range of the accumulation pore volume of the unformed activated carbon particles is 0.6-5cm3/g.Unformed activity
The accumulation pore volume of charcoal particle, which significantly affects sound-absorbing particle, reduces the effect of resonance frequency.It is less than 0.4cm in accumulation pore volume3/g
When, sound-absorbing particle is substantially reduced the adsorption and desorption ability of air molecule.Lower pore volume causes air molecule smooth
The unformed activated carbon particles of disengaging, particle also can not largely absorb air molecule.And when accumulation pore volume is increased to 0.7cm3/
After g, mesoporous content rises, so that it is needs that air molecule quickly passes in and out that particle, which is met,.Air molecule is adsorbed,
The response speed of desorption obviously rises, and the equivalent dilatation multiplying power of the cabinet of sounding device is obviously risen.Accumulate pore volume after
After height of continuing rising, the content of micropore also accordingly rises, and the amount of particle absorption air molecule also significantly rises.Thus, it is possible to preferably rise
To the effect for reducing resonance frequency.
Particularly, the accumulation pore volume of unformed activated carbon particles is not easy excessively high, if pore volume is excessively high, or causes to be not easy
The problems such as bonding, the structural reliability reduction of active carbon sound-absorbing particle.Thus problem bring bonding agent dosage rising instead can
Causing the content of unformed activated carbon particles in active carbon sound-absorbing particle reduces, and affects the acoustical behavior of particle instead.
Preferably, the accumulation pore volume range of unformed activated carbon particles is 0.8-2cm3/g.Within the scope of this, activity
Charcoal sound-absorbing particle can play good acoustical behavior, and be not in structural reliability reduction, unformed activated carbon particles
The problems such as content reduces.
Further, the ratio range of the accumulation pore volume of the micropore and the mesoporous accumulation pore volume is 0.05-
20.Preferably, the ratio range of the two is 0.1-5, for example, above-mentioned ratio is chosen as 1 or 2.For with phase homogenous quantities not
With active carbon sound-absorbing particle, the ratio that micropore accumulates pore volume and mesoporous accumulation pore volume is higher, the adsorption and desorption of air molecule
Performance is stronger.This performance characteristics is mainly reflected in micropore and is capable of providing bigger volume, for being absorbed to air molecule,
Keep it bigger for the equivalent dilatation multiplying power of the cabinet of sounding device.The effect for reducing resonance frequency is better.But in the present invention
Technical solution in, the two ratio be no more than 20.Ratio is more than active carbon sound-absorbing particle reduction resonance frequency after 20
Effect sharply declines.The reason is that the excessive micro content that embodies of above-mentioned ratio is excessively high, it is most of in active carbon sound-absorbing particle
Cellular structure it is undersized, thus hinder the convection current of air, hinder air molecule in active carbon sound-absorbing particle into
Out.And then the propagation of sound wave is affected, to f0Reducing effect strongly reduce.
Optionally, the specific surface area range of the unformed activated carbon particles is 1000-3000m2/g.Preferably, described
The specific surface area range of unformed activated carbon particles is 1500-2800m2/g.In a certain range, unformed activated carbon particles
Specific surface area accumulates pore volume with positive correlation with it.Specific surface area is bigger, and accumulation pore volume is bigger.In range appropriate
Interior, accumulative pore volume is bigger, and unformed activated carbon particles are bigger to air adsorption ability, to f0Reducing effect it is better.
Preferably, the unformed activated carbon particles include hydrophobic amorphous activated carbon particles.Hydrophobic active carbon granule
The surface of son does not contain hydrophilic carboxyl, hydroxyl, amino groups.Using with hydrophobic unformed activated carbon particles,
On the one hand it can reduce impurity content in active carbon sound-absorbing particle, when the processing technologys such as being bonded, being granulated, particle is dredged
The aqueous cellular structure that can make its own will not adsorb bonding agent.In addition, for active carbon sound-absorbing finished granule, hydrophobicity
It can reduce the case where particle absorbs the steam in air, liquid avoided to result in blockage the cellular structure of active carbon sound-absorbing particle
The problems such as.It reduces active carbon sound-absorbing particle in the long-term use, the risk to fail occurs because adsorbing water, bonding agent.
The present invention also provides a kind of active carbon sound-absorbing particle, which uses unformed carbon particle and high score
Sub- polymer bonding agent mixing granulation is formed.The high molecular polymer bonding agent glues powdered unformed activated carbon particles
It closes in the active carbon sound-absorbing particle convenient for loading, applying.Particularly, between the unformed activated carbon particles being bonded together
Micron-sized duct can be formed, absorption of the active carbon sound-absorbing particle to air, releasability are further increased.
Optionally, the particle size range of the active carbon sound-absorbing particle itself is 50-1000 microns.Active carbon sound-absorbing particle is certainly
The partial size of body can have an impact the factors such as bulk density, the bonding agent content of particle, and then influence reduction resonance frequency f0
Effect.
If the partial size of active carbon sound-absorbing particle is less than 50 microns, the intensity relative drop of active carbon sound-absorbing particle itself.
After being applied in the cabinet of sounding device, the variation of vibration, the air pressure of air becomes easier to cause active carbon sound-absorbing
Grain plays powder, is crushed.This problem can seriously affect particle reduce resonance frequency effect, and be possible to sounding device can
It is impacted by property.
And if the partial size of active carbon sound-absorbing particle be greater than 1000 microns when, the volume of particle is relatively large, particle with
Gap between grain significantly increases.When this active carbon sound-absorbing particle is placed in the cabinet of sounding device, the accumulation of particle
Density is substantially reduced.Correspondingly, in the unit volume of cabinet, the amount relative drop for the active carbon sound-absorbing particle that can be filled.
Therefore, the substance that can generate virtual capacity enlargement effect is reduced, and reduces resonance frequency f0Effect be weakened.
Therefore, the particle size range of active carbon sound-absorbing particle itself is maintained in 50-1000 micron range, can be basically reached
Reduce resonance frequency f0Performance requirement.Preferably, the particle size range of active carbon sound-absorbing particle itself is 100-450 micron
Between.Such as partial size is 200,250 microns.In above-mentioned preferred scope, resonance frequency f is reduced0Performance be optimal level.Institute
The particle size range of the particle size range and unformed activated carbon particles of stating active carbon sound-absorbing particle can be with matching design.Such as it is optional
Ground, the particle size range of active carbon sound-absorbing particle are 50-1000 microns, and the particle size range of the unformed activated carbon particles is 0.1-
100 microns.Preferably, the particle size range of the active carbon sound-absorbing particle is 100-450 microns, the unformed activated carbon particles
Particle size range be 0.2-20 microns.By the control to partial size, optimal bulk density can be reached and reduce resonance frequency
Effect.
The present invention also provides the optional type of the high molecular polymer bonding agent, the high molecular polymer bonding agent
It is configured as on the basis of can guarantee sizing, the structural stability of active carbon sound-absorbing particle, does not destroy, blocks without fixed as far as possible
Cellular structure in type activated carbon particles.
Optionally, the high molecular polymer bonding agent includes polyacrylic acid (ester) class, polyvinyl alcohol, polystyrene
At least one of class, polyvinyl acetate class, latex class, polyolefins bonding agent.Above-mentioned high molecular polymer bonding agent can also
With it is subsequent active carbon sound-absorbing particle is made after taken out from sound-absorbing particle by degreasing process again, to leave richer hole
Road structure.Preferably, quality accounting range of the polymeric adhesive in the active carbon sound-absorbing particle is 1-10wt%.
If the dosage of the too high levels of polymeric adhesive, unformed activated carbon particles is accordingly reduced, then the performance meeting of air is absorbed
It is affected.And if the content of polymeric adhesive is too low, has easily there is powder, broken etc. and has asked in manufactured active carbon sound-absorbing particle
Topic, causes structural reliability to reduce.
In sounding device, in the environment of an approximate atmospheric pressure, active carbon sound-absorbing particle of the invention has to nitrogen
The high absorbent capacity and absorption coefficient of gas molecule and other air molecules.Active carbon sound-absorbing particle provided by the invention is put into
In the rear operatic tunes of Microspeaker, can effective Microspeaker middle low-frequency resonant frequency f0, reducing effect is in 0.5-
Between 4.5Hz/mg range.The active carbon sound-absorbing particle can change the gas being comprised in the substantially closed rear operatic tunes
Compliance.
The active carbon sound-absorbing particle provided by the invention is suitable for adjusting the resonance frequency of the cavity of base closed.Active carbon
Sound-absorbing particle inserts the cabinet of sounding device, the damping for increasing sounding device can be equivalent to, to reduce the strength of resonance.In turn
Reduce the electrical impedance peak value of the sounding device.
On the other hand, active carbon sound-absorbing material provided by the invention can be repeatedly to the adsorption and desorption effect of air molecule
It executes, the phenomenon that reduced performance will not occur due to adsorption/desorption air molecule repeatedly.The active carbon sound-absorbing material can be anti-
It is multiple to be used for a long time.
The present invention also provides a kind of sounding devices.The sounding device includes that shell, vibration component and above-mentioned active carbon are inhaled
Sound particle.Accommodating chamber is formed in the shell, the vibration component is disposed in the housing.It is provided in the accommodating chamber
The active carbon sound-absorbing particle.
Accommodating chamber is divided into the preceding operatic tunes and the rear operatic tunes by the vibration component, and the acoustic aperture that goes out on the preceding operatic tunes and shell connects
Logical, the rear operatic tunes is then substantially at closed space.The active carbon sound-absorbing particle can be set in the rear operatic tunes.Certainly, of the invention
Be not intended to limit before being placed on active carbon sound-absorbing particle in the operatic tunes, with to the preceding operatic tunes sound and air-flow be adjusted.
Although some specific embodiments of the invention are described in detail by example, the skill of this field
Art personnel it should be understood that example above merely to being illustrated, the range being not intended to be limiting of the invention.The skill of this field
Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above embodiments.This hair
Bright range is defined by the following claims.
Claims (10)
1. a kind of active carbon sound-absorbing particle, which is characterized in that the active carbon sound-absorbing particle using unformed activated carbon particles with
High molecular polymer bonding agent is mixed, and the active carbon sound-absorbing material includes three kinds of carbon, hydrogen, oxygen elements, described unformed
Activated carbon particles contain the unrest formed by the random accumulation of molecular fragment of two-dimentional graphite linings structure and/or three-dimensional graphite crystallite
Layer structure, has loose cellular structure in the unformed activated carbon particles, the cellular structure includes nanoscale micropore
With it is mesoporous, the particle size range of the active carbon sound-absorbing particle is 50-1000 microns, the partial size model of the unformed activated carbon particles
Enclose is 0.1-100 microns.
2. sound-absorbing particle according to claim 1, which is characterized in that the carbon matter in the unformed activated carbon particles
It measures accounting and is greater than or equal to 60wt%, the carbon oxygen mass ratio in the unformed activated carbon particles is greater than or equal to 3.
3. sound-absorbing particle according to claim 1, which is characterized in that the carbon matter in the unformed activated carbon particles
It measures accounting and is greater than or equal to 60wt%, the carbon-hydrogen ratio in the unformed activated carbon particles is greater than or equal to 11.
4. sound-absorbing particle according to claim 1, which is characterized in that the particle size range of the active carbon sound-absorbing particle is
100-450 microns, the particle size range of the unformed activated carbon particles is 0.2-20 microns.
5. active carbon sound-absorbing particle according to claim 1, which is characterized in that the cellular structure micropore and mesoporous, institute
The pore diameter range for stating micropore is 0.5-2 nanometers, and the mesoporous pore diameter range is 2-3.5 nanometers.
6. active carbon sound-absorbing particle according to claim 1, which is characterized in that the accumulation of the unformed activated carbon particles
Pore volume range is 0.6-5cm3/g。
7. active carbon sound-absorbing particle according to claim 1, which is characterized in that the high molecular polymer bonding agent includes
Polyacrylic, polyvinyl alcohol, polystyrene type, polyurethanes, polyvinyl acetate, in polybutadiene rubber bonding agent
At least one, quality accounting range of the polymeric adhesive in the active carbon sound-absorbing particle be 1-10wt%.
8. active carbon sound-absorbing particle according to claim 1, which is characterized in that the unformed activated carbon particles include dredging
Aqueous unformed activated carbon particles.
9. active carbon sound-absorbing particle according to claim 1, which is characterized in that the accumulation of the unformed activated carbon particles
Density is 0.05-0.8g/cm3。
10. a kind of sounding device characterized by comprising
Shell is formed with accommodating chamber in the shell；
Vibration component, the vibration component are disposed in the housing；
Be provided in the accommodating chamber claim 1-9 it is one of any described in active carbon sound-absorbing particle.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811446666.4A CN109660924B (en) | 2018-11-29 | 2018-11-29 | Activated carbon sound-absorbing particle and sound production device |
| PCT/CN2019/115975 WO2020108252A1 (en) | 2018-11-29 | 2019-11-06 | Activated carbon sound absorption particle and sound production apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811446666.4A CN109660924B (en) | 2018-11-29 | 2018-11-29 | Activated carbon sound-absorbing particle and sound production device |
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| Publication Number | Publication Date |
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| CN109660924A true CN109660924A (en) | 2019-04-19 |
| CN109660924B CN109660924B (en) | 2021-05-18 |
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| CN (1) | CN109660924B (en) |
| WO (1) | WO2020108252A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110817863A (en) * | 2019-12-09 | 2020-02-21 | 歌尔股份有限公司 | Activated carbon sound-absorbing particle and sound-producing device |
| CN110980733A (en) * | 2019-12-09 | 2020-04-10 | 歌尔股份有限公司 | Activated carbon sound-absorbing particle and sound-producing device |
| CN111147987A (en) * | 2020-01-02 | 2020-05-12 | 歌尔股份有限公司 | Sound-absorbing particle, sound-generating device, and electronic apparatus |
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| WO2020108252A1 (en) * | 2018-11-29 | 2020-06-04 | 歌尔股份有限公司 | Activated carbon sound absorption particle and sound production apparatus |
| WO2020108256A1 (en) * | 2018-11-29 | 2020-06-04 | 歌尔股份有限公司 | Amorphous activated carbon particles and sound-absorption particles and sound production device |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101416528A (en) * | 2006-04-03 | 2009-04-22 | 松下电器产业株式会社 | Speaker system |
| CN203859791U (en) * | 2014-04-29 | 2014-10-01 | 深圳市渴望通信有限公司 | Novel mobile phone with loudspeaker |
| CN104583120A (en) * | 2012-07-26 | 2015-04-29 | 关西热化学株式会社 | Activated carbon having large active surface area |
| CN105101036A (en) * | 2015-07-31 | 2015-11-25 | 瑞声光电科技(常州)有限公司 | Sounding device and installation method thereof |
| CN105195061A (en) * | 2015-09-06 | 2015-12-30 | 歌尔声学股份有限公司 | Sound absorption material preparation method and sound absorption material |
| CN105237033A (en) * | 2015-09-06 | 2016-01-13 | 歌尔声学股份有限公司 | Preparation method of sound absorbing material, the sound absorbing material and filling method of same |
| CN105516880A (en) * | 2015-12-01 | 2016-04-20 | 歌尔声学股份有限公司 | Sound absorbing material preparation method, sound absorbing material and loudspeaker |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016030B (en) * | 2012-12-21 | 2014-08-20 | 南通大学 | Broadband sound absorbing material and sound absorbing device |
| KR101788109B1 (en) * | 2015-12-29 | 2017-10-19 | 주식회사 이엠텍 | Micro-speaker having an air adsorbent |
| CN108298559B (en) * | 2018-01-03 | 2021-08-06 | 瑞声光电科技(常州)有限公司 | Molecular sieve, sound-absorbing material using molecular sieve and loudspeaker |
| CN109660924B (en) * | 2018-11-29 | 2021-05-18 | 歌尔股份有限公司 | Activated carbon sound-absorbing particle and sound production device |
-
2018
- 2018-11-29 CN CN201811446666.4A patent/CN109660924B/en active Active
-
2019
- 2019-11-06 WO PCT/CN2019/115975 patent/WO2020108252A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101416528A (en) * | 2006-04-03 | 2009-04-22 | 松下电器产业株式会社 | Speaker system |
| CN104583120A (en) * | 2012-07-26 | 2015-04-29 | 关西热化学株式会社 | Activated carbon having large active surface area |
| CN203859791U (en) * | 2014-04-29 | 2014-10-01 | 深圳市渴望通信有限公司 | Novel mobile phone with loudspeaker |
| CN105101036A (en) * | 2015-07-31 | 2015-11-25 | 瑞声光电科技(常州)有限公司 | Sounding device and installation method thereof |
| CN105195061A (en) * | 2015-09-06 | 2015-12-30 | 歌尔声学股份有限公司 | Sound absorption material preparation method and sound absorption material |
| CN105237033A (en) * | 2015-09-06 | 2016-01-13 | 歌尔声学股份有限公司 | Preparation method of sound absorbing material, the sound absorbing material and filling method of same |
| CN105516880A (en) * | 2015-12-01 | 2016-04-20 | 歌尔声学股份有限公司 | Sound absorbing material preparation method, sound absorbing material and loudspeaker |
Non-Patent Citations (1)
| Title |
|---|
| 黄振兴: "《活性炭技术基础》", 31 December 2006 * |
Cited By (22)
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|---|---|---|---|---|
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| WO2020108252A1 (en) | 2020-06-04 |
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