CN109963243A - For reducing the active carbon sound-absorbing particle and sounding device of sounding device resonance frequency - Google Patents
For reducing the active carbon sound-absorbing particle and sounding device of sounding device resonance frequency Download PDFInfo
- Publication number
- CN109963243A CN109963243A CN201910194962.8A CN201910194962A CN109963243A CN 109963243 A CN109963243 A CN 109963243A CN 201910194962 A CN201910194962 A CN 201910194962A CN 109963243 A CN109963243 A CN 109963243A
- Authority
- CN
- China
- Prior art keywords
- active carbon
- sound
- absorbing particle
- carbon sound
- absorbing
- 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.)
- Pending
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 241
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 221
- 239000002245 particle Substances 0.000 title claims abstract description 206
- 230000001603 reducing effect Effects 0.000 title claims abstract description 31
- 239000011148 porous material Substances 0.000 claims abstract description 68
- 238000009825 accumulation Methods 0.000 claims abstract description 52
- 210000003850 cellular structure Anatomy 0.000 claims abstract description 32
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 16
- 239000001257 hydrogen Substances 0.000 claims abstract description 16
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 12
- 239000001301 oxygen Substances 0.000 claims abstract description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 6
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims abstract 2
- CSJDCSCTVDEHRN-UHFFFAOYSA-N methane;molecular oxygen Chemical compound C.O=O CSJDCSCTVDEHRN-UHFFFAOYSA-N 0.000 claims description 25
- 239000003610 charcoal Substances 0.000 claims description 13
- 239000004215 Carbon black (E152) Substances 0.000 claims description 4
- 229930195733 hydrocarbon Natural products 0.000 claims description 4
- 150000002430 hydrocarbons Chemical class 0.000 claims description 4
- 239000011358 absorbing material Substances 0.000 abstract description 59
- 230000000694 effects Effects 0.000 abstract description 44
- 229910002804 graphite Inorganic materials 0.000 abstract description 15
- 239000010439 graphite Substances 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 13
- 238000003763 carbonization Methods 0.000 abstract description 12
- 239000012634 fragment Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 15
- 238000001179 sorption measurement Methods 0.000 description 14
- 238000010521 absorption reaction Methods 0.000 description 10
- 238000003795 desorption Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000002336 sorption--desorption measurement Methods 0.000 description 4
- 239000002250 absorbent Substances 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 208000035475 disorder Diseases 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 206010016256 fatigue Diseases 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention discloses a kind of active carbon sound-absorbing particles and sounding device for reducing sounding device resonance frequency.The active carbon sound-absorbing particle, it is characterized in that, the active carbon sound-absorbing particle includes three kinds of carbon, hydrogen, oxygen elements, the active carbon sound-absorbing particle contains 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 active carbon sound-absorbing particle, the particle size range of the active carbon sound-absorbing particle is 30-1000 microns, and the accumulation pore volume range of the active carbon sound-absorbing particle is 0.3-4cm3/g.The present invention controls the particle size range of sound-absorbing particle in a certain range, the content of the covalent bond between sound-absorbing material is adjusted by carbonization technique, further by state modulators such as the accumulation pore volumes, bulk density, specific surface area of active carbon sound-absorbing particle in preferable range, to make active carbon sound-absorbing material for reducing resonance frequency better effect in sounding device.
Description
Technical field
The present invention relates to technical field of acoustics, in particular it relates to which one kind is for reducing sounding device resonance frequency
Active carbon sound-absorbing particle and sounding device.
Background technique
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。
Sounding device, which generallys use, loads sound-absorbing material to reduce resonance frequency, and sound-absorbing material is mostly by being filled in sounding device
Active carbon sound-absorbing particle in back cavity is constituted.The crystallite molecule contained in active carbon sound-absorbing particle is with random, disorder shape
Formula stacks, while the shape of each crystallite, of different sizes.Flourishing duct knot is thus formd on active carbon sound-absorbing particle
Structure, such as mesoporous and micropore, these cellular structures decide the absorption property of active carbon sound-absorbing particle.Wherein, micropore is for storing
Gas, mesoporous is the channel of gas transport.Since the particle size of active carbon sound-absorbing particle, carburizing temperature affect micropore and Jie
Quantity, the size in hole, and micropore and mesoporous size and active carbon attract accumulation pore volume, bulk density, the specific surface of particle
The parameters such as product are related.Those skilled in the art evaluate active carbon sound-absorbing particle using above-mentioned parameter to the adsorption/desorption energy of air
Power reduces the ability of resonance frequency that is, in sounding device.
The inventors discovered that the active carbon sound-absorbing particle of same quality is to reduction sounding device resonance frequency in the prior art
It is ineffective.Therefore, the resonance frequency of sounding device how is reduced to improve acoustical behavior, the one of skilled artisan
A main direction of studying.
Summary of the invention
It is an object of the present invention to provide a kind of active carbon sound-absorbing particles of resonance frequency for reducing sounding device
New solution.
According to the first aspect of the invention, a kind of active carbon sound-absorbing for reducing sounding device resonance frequency is provided
Grain and sounding device, the active carbon sound-absorbing particle include three kinds of carbon, hydrogen, oxygen elements, wherein carbon quality accounting be greater than or
Equal to 60wt%, the active carbon sound-absorbing particle is the structure formed by covalent bond, is had in the active carbon sound-absorbing particle
Loose cellular structure, the cellular structure include nanoscale micropore and mesoporous, the partial size model of the active carbon sound-absorbing particle
Enclosing is 30-1000 microns, and the accumulation pore volume range of the active carbon sound-absorbing particle is 0.3-4cm3/g。
Optionally, the accumulation pore volume range of the active carbon sound-absorbing particle is 0.3-2.5cm3/g。
Optionally, the ratio range of the accumulation pore volume of the micropore and the mesoporous accumulation pore volume is 0.1-20.
Optionally, less than 2 nanometers, the mesoporous aperture is greater than 20 nanometers in the aperture of the micropore.
Optionally, the specific surface area range of the active carbon sound-absorbing particle is 500-3000 ㎡/g.
Optionally, the specific surface area range of the active carbon sound-absorbing particle is 800-3000 ㎡/g.
Optionally, the bulk density of the active carbon sound-absorbing particle is 0.05-1.5g/cm3。
Optionally, carbon oxygen mass ratio is greater than 3 in the active carbon sound-absorbing particle.
Optionally, carbon-hydrogen ratio is greater than 11 in the active carbon sound-absorbing particle.
According to the second aspect of the invention, a kind of sounding device is additionally provided, which includes:
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.
Of the invention one has technical effect that, carbon-hydrogen, carbon-in the active carbon sound-absorbing particle under certain particle size range
There is certain correlation in the parameters such as the quantity of oxygen covalent bond and sound-absorbing particulate accumulation pore volume, bulk density, specific surface area.
By the carbonization technique of active carbon sound-absorbing material, by the accumulation pore volume, bulk density, specific surface area etc. of active carbon sound-absorbing particle
State modulator is in preferable range, to make active carbon sound-absorbing material for reducing resonance frequency effect more in sounding device
It is good.
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 is the vibration frequency of the active carbon sound-absorbing material of different C/Hratios provided by the invention and the curve of electrical impedance
Figure；
Fig. 4 be active carbon sound-absorbing material provided by the invention carbon-to-oxygen ratio be 20 when accumulate pore volume curve graph；
Fig. 5 is the partial size of active carbon sound-absorbing particle provided by the invention and the contrast table of resonance frequency reducing effect；
Fig. 6 is the accumulation pore volume of micropore and mesoporous accumulation pore volume in active carbon sound-absorbing particle provided by the invention
The contrast table of ratio and resonance frequency reducing effect；
Fig. 7 is the schematic diagram of active carbon sound-absorbing material application scenarios provided by the invention.
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.
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 ratio provided by the invention and the curve of electrical impedance
Figure, Fig. 3 are the vibration frequency of the active carbon sound-absorbing material of different C/Hratios provided by the invention and the curve graph of electrical impedance, Fig. 4
The carbon-to-oxygen ratio for being active carbon sound-absorbing material provided by the invention accumulates the curve graph of pore volume when being 20, Fig. 5 is offer of the present invention
Active carbon sound-absorbing particle partial size and resonance frequency reducing effect contrast table, Fig. 6 is active carbon sound-absorbing provided by the invention
The contrast table of the ratio of the accumulation pore volume of micropore and mesoporous accumulation pore volume and resonance frequency reducing effect, Fig. 7 in particle
It is the schematic diagram of active carbon sound-absorbing material application scenarios provided by the invention.Above-mentioned attached drawing is the active raw material of wood-charcoal based on substrate of the same race
The measured experimental data of material, now by taking Fig. 1 to Fig. 7 as an example, to the work of the invention for reducing sounding device resonance frequency
The principle of property charcoal sound-absorbing material is described in detail.
The present invention provides a kind of active carbon sound-absorbing material for reducing sounding device resonance frequency, the active carbon is inhaled
Sound material is formed by loose active carbon sound-absorbing particle packing.It is better to realize in order to reduce the resonance frequency of sounding device
Active carbon sound-absorbing particle is usually filled in the back cavity of sounding device by acoustical behavior.As shown in fig. 7, before sounding device includes
Chamber 1 and back cavity 2, active carbon sound-absorbing is particles filled in the back cavity 2 of sounding device 4, is particularly located at fill area 3.Work as sounding device
When work, it can change with the regularity of pressure in back cavity in the active carbon sound-absorbing particle of loosely-packed shape and realize to gas
Absorption, release action increase back cavity volume to reach, reduce the effect of resonance frequency.
The active carbon sound-absorbing material contains two-dimentional graphite linings and/or three-dimensional graphite crystallite, is accumulated by graphite linings and crystallite
There is loose cellular structure inside the active carbon sound-absorbing material of formation.The cellular structure includes nanoscale micropore and Jie
Hole.The mesoporous aperture is greater than the aperture of micropore.Cellular structure in active carbon sound-absorbing material can make active carbon sound absorber
Expect to generate the effect quickly absorbed and released to air.Carbon therein forms frame, duct knot for providing support
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.
The present invention provides a kind of active carbon sound-absorbing material, active carbon be with containing the substance based on charcoal through high temperature cabonization and activation
Made of porosity adsorbent material, it have good absorption property.The sound-absorbing material includes three kinds of carbon, hydrogen, oxygen elements, described
Sound-absorbing material is formed by active carbon sound-absorbing particle packing, and there is a large amount of oxygen and hydrogen in active carbon distinguishes in carbonisation
The covalent bond to be formed positioned at activated carbon surface is combined with carbon atom, i.e., the described active carbon sound-absorbing particle is formed by covalent bond
Structure.The active carbon sound-absorbing particle can be directly filled into the back cavity of sounding device, and active carbon sound-absorbing particle is total by carbon-to-carbon
After valence link, carbon-oxygen covalent bond or carbon-hydrogen covalently bonded are combined, the micron that is formed between multiple active carbon sound-absorbing particles
The duct of grade further improves absorption of the active carbon sound-absorbing particle to air, releasability.
Optionally, the particle size range of the active carbon sound-absorbing particle itself is 30-1000 microns.Active carbon sound-absorbing particle is certainly
The partial size of body can have an impact the bulk density of particle, and then influence reduction resonance frequency f0Effect.
If the partial size of active carbon sound-absorbing particle is less than 30 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.Meanwhile excessive grain
Diameter size is easy to cause the cellular structure that particle uneven heating in carbonisation is even, is formed not perfect, and accumulation pore volume becomes smaller,
Active carbon sound-absorbing particle has different degrees of reduction to adsorption capacity, the equivalent dilatation ability of gas, reduces resonance frequency
Effect is poor.
In addition, being limited in the prior art by process conditions, the particle size for processing the activated carbon particles of formation is smaller.It is logical
It crosses sieve and sub-elects particle within the scope of certain size, by the way of bonding, by high molecular polymer bonding agent and active carbon
Particle bonding, the activated carbon particles being bonded together form the bigger particle of particle size, can satisfy and are filled into sounding dress
Postpone the requirement in chamber.But this processing method is easy to cause micropore between adjacent particles and mesoporous glued dose of blocking, and one
Aspect reduces the integrality of cellular structure, to the absorption property of air using bonding agent；On the other hand, due to particle itself
Can a variety of irregular shapes such as spherical in shape, stick, it is poor that different particle is bonded the grain structure stability to be formed,
It is easy to adversely affect the acoustical behavior of sounding device.The present invention is by screening, by the size controlling of particle in 30-1000
Micron, particle size are distributed in lesser section, the difficulty of preparation are reduced, and easy to control, convenient for the mechanization of scale
Production.
Therefore, the particle size range of active carbon sound-absorbing particle itself is maintained in 30-1000 micron range, is basically reaching drop
Low resonant frequency f0Performance requirement on the basis of also meet and loaded requirement.Meanwhile in the particle size range, carbon inside particle
Atomic arrangement closely makes its intensity height, wearability good, and ash amount is low.I.e. continuous work is not in back cavity for active carbon sound-absorbing material
Easy to wear, stability is good.
As shown in figure 5, showing active carbon sound-absorbing grain diameter is respectively 20,30,80,300,1000 and 1500 microns
When resonance frequency reducing effect and particle size relationship.When the partial size of active carbon particle is 20 and 1500 microns, resonance frequency
Rate f0Decreasing value is 156Hz and 86Hz, and effect is poor.The partial size of active carbon sound-absorbing particle is in 30-1000 microns, to resonance frequency
Rate f0Reducing effect it is preferable.Preferably, the particle size range of active carbon sound-absorbing particle is between 80-300 microns.Such as partial size is
200,250 microns.In above-mentioned preferred scope, resonance frequency f is reduced0Performance be optimal level.Pass through the control to partial size
System can achieve the effect that optimal bulk density and reduce resonance frequency.
In the present embodiment, the particle size range of active carbon sound-absorbing particle is 30-1000 microns, the partial size of active carbon sound-absorbing particle
Influence 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.It accumulates close
Degree refers to that particle under nature, loose condition (of surface), is packed into the volume of container according to a certain method, including sky between particle volume and particle
The volume of gap.That is, in unit volume, bulk density decide load active carbon sound-absorbing particle number, load
Grain number it is related with absorption property.
If the partial size of active carbon sound-absorbing particle is too small, it will cause bulk densities to significantly increase.Under certain volume,
The quality for the active carbon sound-absorbing particle that can be filled is opposite to be reduced, and the impaired performance for reducing resonance frequency is caused.And if living
The partial size of property charcoal sound-absorbing particle is excessive, and it will cause bulk densities to be substantially reduced.Under certain volume, excessive bulk density
The energy that will lead to the sound wave consumed when the particle forced vibration in space is reduced, and the tank-volumes for being equivalent to sounding device are hollow
Gas compliance (Cma) reduce, it will also result in the impaired performance for reducing resonance frequency.
For example, the particle size range of the active carbon sound-absorbing particle is 80-300 microns, within the scope of this, made work
Property charcoal sound-absorbing particle can show good reduction resonance frequency f0Effect.
Correspondingly, the optional range of the bulk density of active carbon sound-absorbing particle is 0.05-1.5g/cm3, it is preferable that the heap
Product density is 0.15-0.8g/cm3.The size of bulk density can also by shape, carbon content of active carbon sound-absorbing particle etc. because
Element is adjusted.
When the partial size that Fig. 5 shows active carbon sound-absorbing particle is respectively 20,30,80,300,1000 and 1500 microns, heap
Product density and resonance frequency f0Reduction degree.When the partial size of active carbon sound-absorbing particle is 20 and 30 microns, accumulate close
Degree shows as 0.55g/cm3And 0.47g/cm3, while the resonance frequency f shown0Reduced degree is 156Hz and 169Hz.With
Particle size increase, to f0Reducing effect presentation first increase the trend reduced afterwards.As it can be seen that when partial size is excessive or too small
When, resonance frequency f0Reduced degree all accordingly reduces.
Active carbon carbonisation directly affects the performance of absorbent charcoal material.According to the difference of carbonization technique, active carbon is inhaled
The specific gravity of the remaining raw material of sound material internal is also different.Correspondingly, the cellular structure of material internal is more perfect, cellular structure
It is bigger to accumulate pore volume, it is better to the adsorption capacity of air.When carbonization as the temperature rises, active carbon sound-absorbing material surface
Carbon-hydrogen, carbon-oxygen covalent bond meeting last decomposition are H2O, CO and CO2, it is carbonized more complete, hydrocarbon, carbon oxygen mass ratio is smaller.
If carbon-hydrogen that active carbon sound-absorbing particle contains, carbon-oxygen covalent bond are more, illustrate that the cellular structure of particle is endless
It is kind, it is all poor to the absorption property of gas, the multiplying power of equivalent dilatation.In practical applications, particle also easily absorbs the water in air
Vapour causes to block duct, and the effect for reducing resonance frequency is further made to be deteriorated.Meanwhile positioned at active carbon sound-absorbing particle surface
Carbon-hydrogen, carbon-oxygen covalent bond are more, and intermolecular force is bigger, and the gap between particle is caused to become smaller, and bulk density increases.
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.
Specifically, the active carbon sound-absorbing material that carbon oxygen mass ratio is 3,5,18 and 50, accumulation pore volume are respectively
0.39g/cm3、0.86g/cm3、1.19g/cm3And 1.50g/cm3.As can be seen that with the increase of carbon oxygen mass ratio, resonance
Frequency f0It is gradually reduced.
Referring to Fig. 1, micropore and mesoporous in active carbon sound-absorbing material when showing carbon oxygen mass ratio difference 3,5,18 and 50
Range.When the mass ratio of carbon oxygen is more than or equal to 5, the pore diameter range of the micropore is 0.4-2 nanometers, the mesoporous aperture
Range is 2-10 nanometers.With the increase of carbon oxygen mass ratio, resonance frequency f0Be gradually reduced, show its have preferably it is humorous
Vibration frequency reducing effect.
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 11.Optionally, the active carbon sound-absorbing material passes through
It is carbonized at high temperature to mineral-type material, plant material, synthetic material etc..According to the difference of carbonization technique, active carbon
The specific gravity of the raw material of sound-absorbing material internal residual is different.And carbon-hydrogen ratio is smaller, other impurity of remaining raw material
Percent mass is smaller.It should be understood that the mesoporous pore volume and accumulation pore volume of material are too small, pore volume of micropore with it is mesoporous
Pore volume ratio it is too small, it is poor to the adsorption and desorption ability of air, for reduce resonance frequency it is ineffective.Correspondingly, material
Cellular structure inside material is more perfect, and the accumulation pore volume of cellular structure is bigger, 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.Referring to Fig. 3, the active carbon sound-absorbing material that carbon-hydrogen ratio is respectively 10,11,13 and 20 is shown, is tired out
Product pore volume is respectively 0.25g/cm3、0.56g/cm3、0.78g/cm3And 1.1g/cm3, with the increase of carbon-hydrogen ratio,
The pore size of grain gradually becomes smaller, and accumulation pore volume is gradually increased, resonance frequency f0Reducing effect improve.
Particularly, described when the mass ratio of carbon oxygen is greater than 5 or hydrocarbon mass ratio is greater than 13, the active carbon sound-absorbing
The accumulation pore volume of particle is more than or equal to 0.78g/cm3.High carbon-oxygen or hydrocarbon mass ratio are mentioned, is all helped in a certain range
Pore volume is accumulated in improving, improves the effect for reducing resonance frequency.
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 and Fig. 2 shows micropore, is situated between using different carbon oxygen mass ratioes as Variable Factors
Hole, accumulation pore volume, resonance frequency f0Reducing effect situation of change.From Figure 2 it can be seen that as vibration frequency increases, impedance
First increase reduces again, and frequency when impedance reaches maximum value is resonance frequency (f0).It is humorous with the increase of carbon oxygen mass ratio
Vibration frequency f0It is gradually reduced, shows that carbon oxygen mass ratio is higher, active carbon sound-absorbing material has the effect for preferably reducing resonance frequency
Fruit.Fig. 4 is carbon oxygen mass ratio when being 20, accumulates the curve graph of pore volume.If left side is shown in solid, micropore size is mainly distributed
Between the range of 0.4-1.3nm, and micropore accumulation pore volume of its aperture under 2nm is 0.64ml/g, mesoporous pore size
It is distributed mainly between the range of 2-10nm, and it is 1.26ml/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 2-10nm.When a large amount of mesoporous apertures
When concentrating in relatively narrow range, mesoporous duct degree of perfection is higher, and the trend risen is presented in accumulation pore volume, to air
Adsorption-desorption effect it is more preferable.Active carbon sound-absorbing material can embody more preferably equivalent capacity enlargement effect as a result,.Preferred
In embodiment, aperture is the 60-65% of total mesoporous amount in the mesoporous of 2-10nm, and then reaches above-mentioned promotion adsorption/desorption performance
Effect.If a large amount of mesoporous apertures concentrate in the pore diameter range greater than 5nm, due to the mesoporous aperture between micropore
It differs larger, causes the mesoporous connection between micropore unsmooth.In turn result in air molecule disengaging micropore and fast in mesoporous
The resistance being subject to when speed flowing increases, and influences the acoustical behavior of active carbon sound-absorbing material.
Preferably, the active carbon sound-absorbing particle 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 active carbon particle.Unformed active carbon
Grain 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
Sound-absorbing particle is capable of forming cellular structure fine and closely woven, abundant, is wanted with meeting active carbon sound-absorbing material to the structure of cellular structure
It asks.
Uniform, fine and closely woven duct knot can be preferably formed after two-dimentional graphite linings and the random accumulation of three-dimensional graphite crystallite
Structure.On the one hand it 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 activity
The structural homogeneity and stability of charcoal sound-absorbing particle improve the structural strength of product made by active carbon sound-absorbing material.
Optionally, the active carbon sound-absorbing particle itself can one of spherical in shape, spherical, piece shape, rod-like structure
Or it is a variety of.For example, being capable of forming duct more evenly, finer and closely woven between carbon particle after using spherical active carbon sound-absorbing particle
Structure, and then improve the acoustical behavior of active carbon sound-absorbing particle.Active carbon sound-absorbing particle can be improved using piece shape carbon particle
Structural stability has reduced powder, damaged risk.Simultaneously because piece shape active carbon sound-absorbing particle carbonization technique is easy, cost compared with
It is low, therefore from the preferred piece shape active carbon sound-absorbing particle of industrial application angle.
Particularly, for it is having in active carbon sound-absorbing particle, including micropore and mesoporous cellular structure, the micropore
Pore diameter range is 0.5-2 nanometers, and the mesoporous pore diameter range is 2-20 nanometers.
In active carbon sound-absorbing particle, the aperture of micropore is limited in lesser size, so that can be comprising filling in particle
Divide, a large amount of micropore, on the one hand increases 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 to need quickly sucking micropore in air molecule
It is mesoporous to provide enough flowing spaces to air molecule or when quickly being discharged from micropore, so that air molecule is quickly moved
It is dynamic, reduce the situation in air bound and micropore.On the other hand, if mesoporous aperture is excessive, unformed active carbon can be reduced
The accumulation pore volume of particle, the performance decline for the absorption air for causing particle whole.
Preferably, the range of the accumulation pore volume of the active carbon sound-absorbing particle is 0.3-5cm3/g.Active carbon sound-absorbing
The accumulation pore volume of grain, which significantly affects sound-absorbing particle, reduces the effect of resonance frequency.
The particle size of active carbon particle, accumulation pore volume are relevant to specific surface area.When grain diameter size is larger
When, particle uneven heating in carbonisation is even, and the cellular structure of formation is not perfect, thus causes air molecule can not be in duct
It is smoothly passed in and out in structure, accumulation pore volume becomes smaller, and specific surface area also declines therewith, and too small particle size intensity is low, ties
Structure is loose, easily broken.
For example, being less than 0.3cm in accumulation pore volume3When/g, adsorption and desorption energy of the active carbon sound-absorbing particle to air molecule
Power is substantially reduced.Lower pore volume causes air molecule that can not smoothly pass in and out active carbon sound-absorbing particle, and particle also can not be big
Amount absorbs air molecule.And when accumulation pore volume is increased to 0.7cm3After/g, mesoporous content rises, so that particle is met is
The needs that air molecule quickly passes in and out.The response speed for carrying out adsorption and desorption to air molecule obviously rises, for sounding device
The equivalent dilatation multiplying power of cabinet obviously rise.After accumulation pore volume continues raising, the content of micropore also accordingly rises, and particle is inhaled
The amount of attached air molecule also significantly rises.Thus, it is possible to preferably play the role of reducing resonance frequency.
Preferably, the accumulation pore volume range of active carbon sound-absorbing particle is 0.3-2.5cm3/g.Within the scope of this, activity
Charcoal sound-absorbing particle can play good acoustical behavior, and be not in that structural reliability reduces, active carbon sound-absorbing particle contains
The problems such as amount reduces.
In active carbon sound-absorbing particle, it is mutually communicated between micropore due to mesoporous, the two ensure that the biography of gas
Defeated, storage and convection current.Thus the ratio of granule pores and mesoporous accumulation pore volume can also reactivity to a certain extent
The adsorption and desorption effect of Carbon Materials.
Further, the ratio range of the accumulation pore volume of the micropore and the mesoporous accumulation pore volume is 0.1-
20.Preferably, the ratio range of the two is 1-20, and present inventor measures through overtesting and finds, micro- under phase homogenous quantities
The accumulation pore volume in hole and the ratio of mesoporous accumulation pore volume are bigger, and the adsorption and desorption ability of nitrogen molecule, equivalent in air
Dilatation multiplying power is bigger.
For example, above-mentioned ratio is chosen as 1 or 2.For the different activities charcoal sound-absorbing particle with phase homogenous quantities, micropore accumulation
The ratio of pore volume and mesoporous accumulation pore volume is higher, and the adsorption and desorption performance of air molecule is stronger.This performance characteristics is main
It is embodied in micropore and is capable of providing bigger volume, for absorbing to air molecule, make it for the cabinet of sounding device
Equivalent dilatation multiplying power is bigger.The effect for reducing resonance frequency is better.
But in the inventive solutions, the two ratio is no more than 20, and ratio is more than active carbon suction after 20
The effect that sound particle reduces resonance frequency sharply declines.As shown in fig. 6, showing micropore and mesoporous accumulation Kong Rong ratio exists
Multiple ratio points reduce the numerical value of resonance frequency within the scope of 0.05-25.When ratio is less than 0.1, the effect of resonance frequency is reduced
It is poor；For ratio in 0.1-20 within the scope of this, the effect for reducing resonance frequency is preferable；When ratio is more than 20, resonance frequency is reduced
The significant effect of rate reduces.The reason is that the excessive micro content that embodies of above-mentioned ratio is excessively high, it is big in active carbon sound-absorbing particle
Partial cellular structure it is undersized, to hinder the convection current of air, hinder air molecule in active carbon sound-absorbing particle
Middle disengaging.And then the propagation of sound wave is affected, to f0Reducing effect strongly reduce.
The specific surface area of active carbon sound-absorbing particle is to evaluate the another important parameter of sound-absorbing material adsorption and desorption performance.Than
Surface area reduces the effect and accumulation pore volume, particle size and carbon-to-carbon covalent bond of resonance frequency to active carbon sound-absorbing particle
The influence of equal multiple factors.In a certain range, specific grain surface product is bigger, stronger to the adsorption capacity of air molecule, reduces
The effect of resonance frequency is better, but the real density of particle is smaller, skeleton is loose, structural strength is lower, increases damaged in use
Risk.
Optionally, the specific surface area range of the active carbon sound-absorbing particle is 500-3000m2/g.Preferably, the activity
The specific surface area range of charcoal sound-absorbing particle is 800-3000m2/g.In a certain range, the specific surface face of active carbon sound-absorbing particle
Product accumulates pore volume with positive correlation with it.Specific surface area is bigger, and accumulation pore volume is bigger.In appropriate range, add up
Pore volume is bigger, and unformed activated carbon particles are bigger to air adsorption ability, to f0Reducing effect it is better.
Preferably, the active carbon sound-absorbing particle includes hydrophobic amorphous active carbon particle.Hydrophobic active charcoal particle
Surface do not contain hydrophilic carboxyl, hydroxyl, amino groups.Using with hydrophobic unformed active carbon particle, one
Aspect can reduce the impurity content in active carbon sound-absorbing particle, and on the other hand, hydrophobicity can reduce particle and absorb air
In steam the case where, the problems such as avoiding liquid from resulting in blockage the cellular structure of active carbon sound-absorbing particle, reduce active carbon
There is the risk to fail in the long-term use, because adsorbing water in sound-absorbing particle.
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, the middle low-frequency resonant frequency f of Microspeaker can be effectively reduced0, reducing effect exists
Between 0.5-15Hz/mg range.The active carbon sound-absorbing particle can change the gas being comprised in the substantially closed rear operatic tunes
The compliance of body.
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.
Carbon-hydrogen, carbon-oxygen covalent bond quantity and sound-absorbing particle are tired in the active carbon sound-absorbing particle under certain particle size range
There is certain correlation in the parameters such as product pore volume, bulk density, specific surface area.The present invention passes through active carbon sound-absorbing material
Carbonization technique, by state modulators such as the accumulation pore volumes, bulk density, specific surface area of active carbon sound-absorbing particle in preferable range
It is interior, to make active carbon sound-absorbing material for reducing resonance frequency better effect in sounding device.
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 and sounding device for reducing sounding device resonance frequency, which is characterized in that described
Active carbon sound-absorbing particle includes three kinds of carbon, hydrogen, oxygen elements, and wherein carbon quality accounting is greater than or equal to 60wt%, the work
Property charcoal sound-absorbing particle be the structure formed by covalent bond, there is in the active carbon sound-absorbing particle loose cellular structure, institute
It includes nanoscale micropore and mesoporous for stating cellular structure, and the particle size range of the active carbon sound-absorbing particle is 30-1000 microns, institute
The accumulation pore volume range for stating active carbon sound-absorbing particle is 0.3-4cm3/g。
2. active carbon sound-absorbing particle according to claim 1, which is characterized in that the accumulation hole of the active carbon sound-absorbing particle
Volume range is 0.3-2.5cm3/g。
3. active carbon sound-absorbing particle according to claim 1, which is characterized in that the accumulation pore volume of the micropore with it is described
The ratio range of mesoporous accumulation pore volume is 0.1-20.
4. active carbon sound-absorbing particle according to claim 3, which is characterized in that the aperture of the micropore is less than 2 nanometers, institute
The aperture for giving an account of hole is greater than 20 nanometers.
5. active carbon sound-absorbing particle according to claim 1, which is characterized in that the specific surface of the active carbon sound-absorbing particle
Product range is 500-3000 ㎡/g.
6. active carbon sound-absorbing particle according to claim 5, which is characterized in that the specific surface of the active carbon sound-absorbing particle
Product range is 800-3000 ㎡/g.
7. active carbon sound-absorbing particle according to claim 1, which is characterized in that the accumulation of the active carbon sound-absorbing particle is close
Degree is 0.05-1.5g/cm3。
8. active carbon sound-absorbing particle according to claim 1, which is characterized in that carbon oxygen matter in the active carbon sound-absorbing particle
Amount is than being greater than 3.
9. active carbon sound-absorbing particle according to claim 1, which is characterized in that hydrocarbon matter in the active carbon sound-absorbing particle
Amount is than being greater than 11.
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 (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910194962.8A CN109963243A (en) | 2019-03-14 | 2019-03-14 | For reducing the active carbon sound-absorbing particle and sounding device of sounding device resonance frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910194962.8A CN109963243A (en) | 2019-03-14 | 2019-03-14 | For reducing the active carbon sound-absorbing particle and sounding device of sounding device resonance frequency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109963243A true CN109963243A (en) | 2019-07-02 |
Family
ID=67024419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910194962.8A Pending CN109963243A (en) | 2019-03-14 | 2019-03-14 | For reducing the active carbon sound-absorbing particle and sounding device of sounding device resonance frequency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109963243A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111163403A (en) * | 2020-01-02 | 2020-05-15 | 歌尔股份有限公司 | Sound-absorbing particle, sound-generating device, and electronic apparatus |
| WO2021115267A1 (en) * | 2019-12-09 | 2021-06-17 | 歌尔股份有限公司 | Activated carbon sound-absorbing particle and sound production device |
| WO2021135874A1 (en) * | 2020-01-02 | 2021-07-08 | 歌尔股份有限公司 | Sound-absorbing granules, sound-producing device, and electronic equipment |
Citations (9)
| 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 |
| JP4875562B2 (en) * | 2007-07-20 | 2012-02-15 | クラレケミカル株式会社 | Speaker device material and speaker device using the same |
| 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 with high 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 |
| CN109448688A (en) * | 2018-11-29 | 2019-03-08 | 歌尔股份有限公司 | A kind of active carbon sound-absorbing material and sounding device |
-
2019
- 2019-03-14 CN CN201910194962.8A patent/CN109963243A/en active Pending
Patent Citations (9)
| 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 |
| JP4875562B2 (en) * | 2007-07-20 | 2012-02-15 | クラレケミカル株式会社 | Speaker device material and speaker device using the same |
| CN104583120A (en) * | 2012-07-26 | 2015-04-29 | 关西热化学株式会社 | Activated carbon with high 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 |
| CN109448688A (en) * | 2018-11-29 | 2019-03-08 | 歌尔股份有限公司 | A kind of active carbon sound-absorbing material and sounding device |
Non-Patent Citations (1)
| Title |
|---|
| 黄振兴: "《活性炭技术基础》", 31 December 2016 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021115267A1 (en) * | 2019-12-09 | 2021-06-17 | 歌尔股份有限公司 | Activated carbon sound-absorbing particle and sound production device |
| CN111163403A (en) * | 2020-01-02 | 2020-05-15 | 歌尔股份有限公司 | Sound-absorbing particle, sound-generating device, and electronic apparatus |
| WO2021135874A1 (en) * | 2020-01-02 | 2021-07-08 | 歌尔股份有限公司 | Sound-absorbing granules, sound-producing device, and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109448688A (en) | A kind of active carbon sound-absorbing material and sounding device | |
| CN109935224A (en) | For reducing the active carbon sound-absorbing material and sounding device of sounding device resonance frequency | |
| CN111163395B (en) | Sound-absorbing particle, sound-generating device, and electronic apparatus | |
| CN109660924A (en) | Active carbon sound-absorbing particle and sounding device | |
| CN109511056A (en) | Unformed activated carbon particles and sound-absorbing particle and sounding device | |
| CN109511057A (en) | Unformed activated carbon particles and sound-absorbing particle and sounding device | |
| CN109511058A (en) | Unformed activated carbon particles and sound-absorbing particle and sounding device | |
| CN109640237A (en) | A kind of active carbon sound-absorbing material and sounding device | |
| US11176919B2 (en) | Acoustic filler including acoustically active beads and expandable filler | |
| CN111163403B (en) | Sound-absorbing particle, sound-generating device, and electronic apparatus | |
| CN111147987B (en) | Sound-absorbing particle, sound-generating device, and electronic apparatus | |
| CN111182419B (en) | Sound-absorbing particle, sound-generating device, and electronic apparatus | |
| CN111135772A (en) | Sound absorbing material preparation method, sound absorbing material, sound generating device and electronic equipment | |
| WO2021135878A1 (en) | Activated carbon sound-absorption material, sound production apparatus and electronic device | |
| CN109963243A (en) | For reducing the active carbon sound-absorbing particle and sounding device of sounding device resonance frequency | |
| WO2018040392A1 (en) | Loudspeaker module | |
| CN110012383A (en) | For reducing the active carbon sound-absorbing particle and sounding device of sounding device resonance frequency | |
| CN110047459A (en) | For reducing the active carbon sound-absorbing material and sounding device of sounding device resonance frequency | |
| WO2018045668A1 (en) | Speaker module | |
| CN109922414A (en) | For reducing the active carbon sound-absorbing material and sounding device of sounding device resonance frequency | |
| WO2021115280A1 (en) | Activated carbon sound-absorbing granules and sound-producing device | |
| CN110980733B (en) | Activated carbon sound-absorbing particle and sound-producing device | |
| US12207046B2 (en) | Microspeaker enclosure including block formed of porous particles |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190702 |