CN105161089B - A kind of sound absorber - Google Patents
A kind of sound absorber Download PDFInfo
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- CN105161089B CN105161089B CN201510336790.5A CN201510336790A CN105161089B CN 105161089 B CN105161089 B CN 105161089B CN 201510336790 A CN201510336790 A CN 201510336790A CN 105161089 B CN105161089 B CN 105161089B
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Abstract
Embodiment discloses a kind of sound absorber, belong to the device field for preventing or reducing ultralow frequency range (120Hz or less) energy consumption of sound wave and standing wave, it include: seal assembly, braced frame and the first plate body, the braced frame is mounted on the wall, first plate body is mounted in the braced frame, vibration chamber is constituted between first plate body, the metope and the braced frame, the seal assembly seals the vibration chamber.The purpose of the present invention is to provide a kind of sound absorber, volume to effectively reduce the processing unit of the ultralow frequency standing wave interference in existing small space while effectively avoids the taken in excess to sound high frequency.
Description
Technical field
The present invention relates to the device fields for preventing or reducing sound wave, in particular to a kind of sound absorber.
Background technique
Architectural acoustics comparative maturity in professional large space such as music hall, venue at present, and for home theater, recording
This kind of small spatial-acoustic in room because former application it is not universal enough, while on technique direction again it is larger be different from large space acoustics,
But the previous output value is too low and is ignored by the various acoustic mechanisms in the world, study and put into also compare it is less, therefore without professional
There is targetedly solution.
The calculation formula of standing wave are as follows: standing wave frequency f0=speed of sound/space opposite distance/2.General small space standing wave
The frequency range of 25Hz-125Hz can seriously be betided.And from formula it is known that large space acoustics because opposition reflecting surface distance than
It is larger, it is not easy to standing wave is constituted, and spatial volume is also bigger, the energy attenuation of ultralow frequency is also than very fast, so large space sound
Hardly have ultralow frequency standing wave.However small spatial-acoustic therefore particularity, ultralow frequency Stationary Wave is at complete
Ball difficult point to be solved, and private savings audiovisual studio becomes increasingly popular now, and traditional treating method is also continuing to use large space acoustics
Processing scheme, can not solve the distinctive Stationary Wave of small spatial-acoustic.
The large space Acoustic treatment method that existing small spatial-acoustic standing wave processing technique is applied, with low on processing standing wave
Frequency trap is handled, and the main structure of bass trap is the superposition of sound-absorbing porous material, and its calculation formula is absorption frequency f0
=speed of sound/sound-absorbing material thickness/(numerical value between 10 to 4), for example, if to absorb the standing wave of 32Hz, calculated thickness
It is 1.076 meters to 2.6875 meters.It is fallen into small spatial-acoustic it is clear that minimum 1.076 meters of the low frequency of thickness can not be accommodated
Trap sound absorption structure.
It lower than 10 meters is small spatial-acoustic that small spatial-acoustic is defined in profession, which is length, width and height any one distances, and general
Actual audiovisual studio is generally the separate space of the floor area of 8-50 square meter.It is difficult to accommodate effective low frequency in lower traditional technology
Enormousness required for trap, simultaneously as sound-absorbing porous material is full frequency band absorption, the only lower limit of absorption frequency and thickness
The problem of degree has relationship, and upper frequency limit side is hypersorption, also will cause taken in excess.
Summary of the invention
The purpose of the present invention is to provide a kind of sound absorbers, dry with the ultralow frequency standing wave for effectively reducing existing small space
The taken in excess to sound high frequency is effectively avoided while the volume for the processing unit disturbed.
In a first aspect, a kind of sound absorber provided by the invention, comprising: seal assembly, braced frame and the first plate body, institute
It states braced frame to be mounted on the wall, first plate body is mounted in the braced frame, first plate body, the metope
And the cavity that the braced frame surrounds constitutes vibration chamber, the seal assembly seals the vibration chamber.
With reference to first aspect, the embodiment of the invention also provides the first possible embodiments of first aspect, wherein institute
Stating seal assembly includes sealing plate, and the braced frame includes multiple vertical mounting plates, multiple vertical mounting plate interval peaces
Vertical fence is constituted on the metope, first plate body is mounted on the vertical fence, and the vibration chamber is by institute
It states the cavity that the first plate body, the metope and the vertical fence surround to constitute, the vibration chamber is close by the sealing plate
Seal into airtight chamber.
The first possible embodiment with reference to first aspect, the embodiment of the invention also provides second of first aspect
Possible embodiment, wherein the braced frame further include it is multiple be transversely mounted plate, it is multiple described to be transversely mounted the installation of plate intervals
Lateral fence is constituted on the vertical fence, first plate body is mounted on the lateral fence, the vibration chamber by
The cavity that first plate body, the metope, the vertical fence and the lateral fence surround is constituted, the vibration chamber
Airtight chamber is sealed to by the sealing plate.
Second of possible embodiment with reference to first aspect, the embodiment of the invention also provides the third of first aspect
Possible embodiment, wherein the plate that is transversely mounted is mounted on the vertical fence by self-tapping screw nail；The self tapping spiral shell
Iron glue Composition spacer is arranged on the screw rod of adjusting screw, in use, the iron glue Composition spacer is transversely mounted plate and institute positioned at described
Between the nut for stating self-tapping screw nail.
The third possible embodiment with reference to first aspect, the embodiment of the invention also provides the 4th kind of first aspect
Possible embodiment, wherein the vertical mounting plate is equipped with mounting hole, and the self-tapping screw nail bit enters in the mounting hole, institute
It states and is plugged with rubber pad in mounting hole.
The 4th kind of possible embodiment with reference to first aspect, the embodiment of the invention also provides the 5th kind of first aspect
Possible embodiment, wherein the one side stacking far from the metope of first plate body is equipped with the second plate body.
With reference to first aspect or the first possible embodiment of first aspect or second of possible embodiment or third
Kind of possible embodiment or the 4th kind of possible embodiment or the 5th kind of possible embodiment, the embodiment of the invention also provides the
6th kind of possible embodiment of one side, wherein the value range of the thickness of first plate body is 2.8 millimeters to 12.2 millis
Rice.
The 6th kind of possible embodiment with reference to first aspect, the embodiment of the invention also provides the 7th kind of first aspect
Possible embodiment, wherein first plate body be glued board, first plate body with a thickness of 12 millimeters.
The 5th kind of possible embodiment with reference to first aspect, the embodiment of the invention also provides the 8th kind of first aspect
Possible embodiment, wherein second plate body be plasterboard, second plate body with a thickness of 9 millimeters, first plate body
For glued board, the value range of the thickness of first plate body is 2.8 millimeters to 12.2 millimeters.
The 8th kind of possible embodiment with reference to first aspect, the embodiment of the invention also provides the 9th kind of first aspect
Possible embodiment, wherein first plate body with a thickness of either one or two of 9 millimeters, 5 millimeters, 3 millimeters and 12 millimeters.
In the embodiment of the present invention, it be sky surrounding is frame that braced frame, which is the centre that a multiple framing components surround,
The support frame of component, similar window frame or doorframe, has certain thickness, and the frame is mounted to a wall, i.e. the frame of surrounding
Component is fixed on the wall, then on the support frame by the installation of the first plate body, the mode of installation can be, the week of first plate body
While being mounted in the frame structure of the surrounding of braced frame, then there is seal assembly by first plate body, the metope and institute
It states and constitutes vibration cavity seal between braced frame.
Therefore, the thickness of braced frame determines that the thickness of the air layer of the vibration chamber, the vibration chamber are formed
One occluded airs layer, that is, constitute a vibrational system, the resonant frequency of the vibrational system and the first plate body and wall
Air layer thickness, the mass area ratio etc. of the first plate body it is related, according to the frequency of sound to be absorbed, reasonably select first
The thickness and air layer thickness of plate body, make sound absorber provided in an embodiment of the present invention in voice input, generate resonance.Make
The vibration frequency of first plate body matches with frequency of sound wave, resonates, and then acoustic wave energy is made to be converted into the dynamic of physical vibration
Can, consume acoustic wave energy by kinetic energy, to play the function of absorbing the sound wave of certain frequency.
From different, the sound-absorbing porous material volume mistake using the sound-absorbing porous material small spatial-acoustic problem of processing of the prior art
It compares greatly, the embodiment of the present invention passes through the resonance sound-absorbing of the first plate body, and it is entirely different with the principle of sound-absorbing porous material, it avoids existing
Volume is excessive when some handles small spatial-acoustic problem using sound-absorbing porous material.
In addition, the frequency for absorbing sound wave is related with the thickness of the first plate body, one timing of thickness, the frequency that can be absorbed sound is one
Fixed, the absorption of the sound to all frequencies is avoided, effectively avoids leading to spatial model the sound frequency other than standing wave frequency
Taken in excess.
Other features and advantages of the present invention will be illustrated in subsequent specification, also, partly be become from specification
It is clear that being understood by implementing the embodiment of the present invention.The objectives and other advantages of the invention can be by written
Specifically noted structure is achieved and obtained in specification, claims and attached drawing.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.By the way that shown in attached drawing, above and other purpose of the invention, feature and advantage will be more clear.In whole
Identical appended drawing reference indicates identical part in attached drawing.Attached drawing, emphasis deliberately are not drawn by actual size equal proportion scaling
It is to show the gist of the present invention.
Fig. 1 shows a kind of structure chart of sound absorber provided in an embodiment of the present invention；
Fig. 2 shows the structure charts of another sound absorber provided in an embodiment of the present invention；
Fig. 3 shows the structure chart of another sound absorber provided in an embodiment of the present invention；
Fig. 4 show it is provided in an embodiment of the present invention without the sound absorber processing space sound wave frequency response curve and
Remaining frequency response after 250 milliseconds；
Fig. 5 show the space sound wave provided in an embodiment of the present invention handled through the sound absorber frequency response curve and
Remaining frequency response after 250 milliseconds；
Fig. 6, which is shown, provided in an embodiment of the present invention to be handled without sound absorber processing and through the sound absorber
The matched curve of the frequency response of space sound wave.
Appended drawing reference: braced frame 101, the first plate body 102, the second plate body 103, sealing plate 104, vertical mounting plate 201,
It is transversely mounted plate 202, self-tapping screw nail 203.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Whole description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Architectural acoustics comparative maturity in professional large space such as music hall, venue at present, and for home theater, recording
This kind of small spatial-acoustic in room because former application it is not universal enough, while on technique direction again it is larger be different from large space acoustics,
But the previous output value is too low and is ignored by the various acoustic mechanisms in the world, study and put into also compare it is less, therefore without professional
There is targetedly solution.
The calculation formula of standing wave are as follows: standing wave frequency f0=speed of sound/space opposite distance/2.General small space standing wave
The frequency range of 25Hz-125Hz can seriously be betided.And from formula it is known that large space acoustics because opposition reflecting surface distance than
It is larger, it is not easy to standing wave is constituted, and spatial volume is also bigger, the energy attenuation of ultralow frequency is also than very fast, so large space sound
Hardly have ultralow frequency standing wave.However small spatial-acoustic therefore particularity, ultralow frequency Stationary Wave is at complete
Ball difficult point to be solved, and private savings audiovisual studio becomes increasingly popular now, and traditional treating method is also continuing to use large space acoustics
Processing scheme, can not solve the distinctive Stationary Wave of small spatial-acoustic.
The large space Acoustic treatment method that existing small spatial-acoustic standing wave processing technique is applied, with low on processing standing wave
Frequency trap is handled, and the main structure of bass trap is the superposition of sound-absorbing porous material, and its calculation formula is absorption frequency f0
=speed of sound/sound-absorbing material thickness/(numerical value between 10 to 4), for example, if to absorb the standing wave of 32Hz, calculated thickness
It is 1.076 meters to 2.6875 meters.It is fallen into small spatial-acoustic it is clear that minimum 1.076 meters of the low frequency of thickness can not be accommodated
Trap sound absorption structure.
It lower than 10 meters is small spatial-acoustic that small spatial-acoustic is defined in profession, which is length, width and height any one distances, and general
Actual audiovisual studio is generally the separate space of the floor area of 8-50 square meter.It is difficult to accommodate effective low frequency in lower traditional technology
Enormousness required for trap, simultaneously as sound-absorbing porous material is full frequency band absorption, the only lower limit of absorption frequency and thickness
The problem of degree has relationship, and upper frequency limit side is hypersorption, also will cause taken in excess.
Therefore, in order to overcome above-mentioned difficulties, in order to effectively reduce the processing that the ultralow frequency standing wave in existing small space interferes
The volume of device and the taken in excess to sound frequency is effectively avoided, the embodiment of the invention provides a kind of sound absorbers, such as Fig. 1
Shown, the sound absorber includes: braced frame 101 and the first plate body 102, and in the embodiment of the present invention, braced frame 101 is one
The centre that a multiple framing components surround is the support frame that sky surrounding is framing component, as shown in Figure 1, similar window frame or
Doorframe, the braced frame 101 are mounted on the wall, and first plate body 102 is mounted in the braced frame 101.Installation
Mode can be, the size of first plate body 102 is matched with the size of the braced frame 101, first plate body 102
Periphery be mounted on four frames of the braced frame 101, therefore, first plate body 102, the braced frame 101
And a vibration chamber is just constituted between the metope.
As shown in Figure 1, further including seal assembly, the seal assembly seals the vibration chamber, specific sealing means
It can be, the seal assembly seals the frame and the wall on the periphery of first plate body 102, the braced frame 101
Gap between face.
The principle of resonance sound-absorbing provided in an embodiment of the present invention is as follows:
The blank perimeters such as glued board, hardboard, plasterboard, cement asbestos board, metal plate are fixed on frame, connection
Occluded airs layer after plate, also constitutes vibrational system.The resonant frequency f of this structure0It can be calculated with following formula:
In above formula, ρ0Indicate atmospheric density, c indicates the speed of sound in air, M0The mass area ratio of display plate, i.e.,
The surface density of first plate body 102 described in the embodiment of the present invention, the air layer thickness before L display plate and wall, described in K expression
The rigid factor of sound absorber structure, K are related with the elasticity of plate, skeleton structure, installation situation.
For rectangular slab, side length is a and b, with a thickness of h, then K are as follows:
E is dynamic elasticity (Young) film amount of plate material, and σ is Poisson's ratio.For general plate under general structural environment,
K=(1~3) * 106kg/(m2*S2).As the rigidity factor K of plate and air layer L all smaller, then resonant frequency f0Calculating
The Section 2 in radical sign in formula is more much smaller than first item, then Section 2 can be omitted.But when L * value it is larger, be more than
100cm, first item will be more much smaller than Section 2 in radical sign, and resonant frequency is just almost unrelated with air layer thickness.
In the embodiment of the present invention, the braced frame 101 with a thickness of 50 millimeters, therefore first plate body 102 and institute
State the air layer between metope with a thickness of 50 millimeters, the value range of the thickness of first plate body 102 is 2.8 millimeters and arrives
12.2 millimeters.
It is summarized by many experiments of inventor, the embodiment of the present invention can absorption frequency be effectively 25Hz to 100Hz's
The energy of low-frequency sound wave.
For example, first plate body 102 be glued board, when with a thickness of 12 millimeters, to standing wave frequency be 25Hz to 54Hz it
Between sound wave sound absorption effect it is significant, the sound wave especially to frequency between 38Hz to 52Hz, the first plate body 102 is absorbed into frequency
When for sound wave between 38Hz to 52Hz, the vibration of the first plate body 102 is violent, the acceleration of the vibration of the first plate body 102 and position
The numerical value of shifting is larger, and acutely, vibration displacement is larger for vibration, illustrates that the energy for the sound wave that the first plate body 102 absorbs almost turns
It is changed to the kinetic energy of the first plate body 102, for doing mechanical movement, sound wave has been consumed.For example, when standing wave frequency is 51Hz,
The vibration acceleration of first plate body 102 is standing wave frequency when being 25Hz 7 times or more, vibration displacement are close to 4 times, and described first
It is very good to the assimilation effect of the sound wave of 51Hz when air layer thickness is 50 millimeters when the glued board that plate body 102 is 12 millimeters.
Therefore, the thickness of braced frame 101 determines the thickness of the air layer of the vibration chamber, the vibration chamber shape
At an occluded airs layer, that is, constitute a vibrational system, the resonant frequency of the vibrational system and the first plate body 102 with
The mass area ratio of the air layer thickness of wall, the first plate body 102 etc. is related, according to the frequency of sound to be absorbed, rationally
The thickness and air layer thickness for selecting the first plate body 102, make sound absorber provided in an embodiment of the present invention in voice input,
Resonance is generated, so that the vibration frequency of the first plate body 102 is matched with frequency of sound wave, resonates, and then convert acoustic wave energy
For the kinetic energy of physical vibration, consume acoustic wave energy by kinetic energy, to play the function of absorbing the sound wave of certain frequency.
From different, the sound-absorbing porous material volume mistake using the sound-absorbing porous material small spatial-acoustic problem of processing of the prior art
It compares greatly, the embodiment of the present invention passes through the resonance sound-absorbing of the first plate body 102, and it is entirely different with the principle of sound-absorbing porous material, it keeps away
It is excessive to exempt from volume when the existing processing small spatial-acoustic problem using sound-absorbing porous material.
In addition, the frequency for absorbing sound wave is related with the thickness of the first plate body 102, and one timing of thickness, the frequency that can be absorbed sound
Be it is certain, avoid the absorption of the sound to all frequencies, effectively avoid leading to spatial model the sound other than standing wave frequency
The taken in excess of frequency.
In addition, as shown in Fig. 2, another kind sound absorber provided in an embodiment of the present invention, comprising: multiple vertical mounting plates
201, sealing plate 104, the first plate body 102 and the second plate body 103, multiple vertical intervals of mounting plate 201 are mounted on the wall
Vertical fence as shown in Figure 2 is constituted on face, first plate body 102 is mounted on the vertical fence, first plate body
102, the vibration chamber constituted between the metope and the vertical fence is sealed to closed chamber by the sealing plate 104
Room.
In the embodiment of the present invention, the structure of the sound absorber be may is that
The thickness of the vertical mounting plate 201 is 50 millimeters, and first plate body 102 is the glued board of rectangle, described the
The width of one plate body 102 is equal to the length of the vertical mounting plate 201, two sides difference of the width of first plate body 102
The two sides of vertical fence are mounted on, two sides of the length of first plate body 102 are mounted on other the two of vertical fence
On side, with sealing plate 104 by the sealed around of sound absorber, make the first plate body 102 periphery and vertical fence periphery with
Gap between metope is closed, makes the vibration cavity constituted between the first plate body 102, the metope and the vertical fence
Room is airtight chamber.
Embodiment as shown in Figure 1 is it is found that the frequency of sound absorption is related with the thickness of the first plate body 102, first plate body
102 be glued board, significant to sound wave sound absorption effect of the standing wave frequency between 25Hz to 54Hz when with a thickness of 12 millimeters, especially
It is the sound wave to frequency between 38Hz to 52Hz, when the first plate body 102 is absorbed into sound wave of the frequency between 38Hz to 52Hz,
The vibration of first plate body 102 is violent, and the acceleration of the vibration of the first plate body 102 and the numerical value of displacement are larger, and vibration acutely, is vibrated
It is displaced larger, illustrates that the energy for the sound wave that the first plate body 102 absorbs almost is converted to the kinetic energy of the first plate body 102, be used to
Mechanical movement is done, sound wave has been consumed.For example, when standing wave frequency is 51Hz, the vibration acceleration of the first plate body 102 be in
7 times or more when wave frequency rate is 25Hz, vibration displacement is close to 4 times, when the glued board that first plate body 102 is 12 millimeters,
It is very good to the assimilation effect of the sound wave of 51Hz when air layer thickness is 50 millimeters.
In addition, the second plate body 103 can also be laminated on the surface of the separate metope of the first plate body 102 in the embodiment of the present invention,
At this point, one piece of plate body is constituted by first plate body 102 and second plate body 103 stacking, for example, second plate body 103
For 9 millimeters of plasterboard, in the embodiment of the present invention, second plate body 103 is plasterboard, and can not only coincide resonant frequency,
But also paint coating or while pasting wallpaper, provide convenience when can be for room finish.
The value range of the thickness of first plate body 102 is 2.8 millimeters to 12.2 millimeters, can specifically be had following several
Kind preferably selects:
When the glued board that the first plate body 102 is 12 millimeters, the plasterboard that the second plate body 103 is 9 millimeters, in small space
When standing wave frequency is between 29Hz to 49Hz, the combined plate body of first plate body 102 and the second plate body 103 can occur centainly
The vibration of displacement, especially when vibration of the standing wave frequency node between 30.945Hz to 36Hz and 40Hz to 48Hz is especially acute
It is strong, wherein when standing wave frequency is 33Hz, the vibration for the combined plate body that first plate body 102 and second plate body 103 are constituted
Dynamic acceleration, speed and displacement reach maximum value, i.e., best to the assimilation effect of the sound wave of 33Hz.Therefore, 12 millimeters of gluing
Standing wave frequency of the closed oscillation chamber of plate and 9 millimeters of plasterboard and the air layer composition between metope to small space sound field
Assimilation effect between 30.945Hz to 36Hz and 40Hz to 48Hz clearly, and to the standing wave frequency of small space sound field
Assimilation effect for the sound wave of 33Hz is best.
When the glued board that the first plate body 102 is 9 millimeters, the plasterboard that the second plate body 103 is 9 millimeters, for small space
Sound wave of the standing wave frequency node between 30Hz to 46Hz, the vibration of first plate body 102 and second plate body 103 compared with
Acutely, the vibration between 38Hz to 41Hz clearly, especially standing wave frequency be 40Hz near when, 102 He of the first plate body
The vibration acceleration of second plate body 103, speed and displacement all reach maximum value, therefore, 9 millimeters of glued board and 9 millimeters
The closed oscillation chamber of plasterboard and the air layer composition between metope arrives the standing wave frequency of small space sound field for 38Hz
Assimilation effect between 41Hz clearly, and to the standing wave frequency of small space sound field be 40Hz sound wave assimilation effect most
It is good.
When the glued board that the first plate body 102 is 5 millimeters, the plasterboard that the second plate body 103 is 9 millimeters, for small space
Sound wave of the standing wave frequency node between 30Hz to 54Hz first plate body 102 and second plate body 103 can be made to send out
Raw vibration, and the vibration between 41Hz to 54Hz is clearly, especially when standing wave frequency is 53Hz, the first plate body 102
All reach maximum value with the vibration acceleration of the first plate body 102, speed and displacement, therefore, 5 millimeters of glued board and 9 millimeters
Plasterboard and between metope air layer composition closed oscillation chamber the standing wave frequency of small space sound field is arrived for 41Hz
Assimilation effect between 54Hz clearly, and to the standing wave frequency of small space sound field be 53Hz sound wave assimilation effect most
It is good.
Firstth plate body 102 is 3 millimeters of glued board, when the plasterboard that the second plate body 103 is 9 millimeters, for small space
Sound wave of the standing wave frequency node between 30Hz to 54Hz first plate body 102 and second plate body 103 can be made to send out
Raw vibration, and the vibration between 44Hz to 52Hz is clearly, especially when standing wave frequency is 47Hz and 49Hz, first
The vibration acceleration of plate body 102 and the first plate body 102, speed and displacement all reach maximum value.Therefore, 3 millimeters of glued board
And 9 millimeters plasterboard and between metope air layer composition closed oscillation chamber be to the standing wave frequency of small space sound field
Assimilation effect between 44Hz to 52Hz clearly, and is the sound wave of 47Hz and 49Hz to the standing wave frequency of small space sound field
Assimilation effect it is best.
Furthermore as shown in figure 3, the embodiment of the invention also provides another sound absorbers, comprising: the first plate body 102,
Two plate bodys 103, multiple are transversely mounted plate 202 and sealing plate 104 at multiple vertical mounting plates 201.
In the embodiment of the present invention, the vertical mounting plate 201 is the rough ground having a size of 30 millimeters * 50 millimeters, i.e. institute
The cross section for stating vertical mounting plate 201 is the rectangle of 30 millimeters of a length of 50 mm wide, therefore the vertical mounting plate 201 is rectangular
Body plate, the width in the two of them face of the vertical mounting plate 201 are 50 millimeters, and the width of the vertical mounting plate 201 is 50 millimeters
Face paste tightly on metope, other vertical mounting plates 201 are also forward-mounted using this mode, multiple vertical mounting plates 201
Length direction it is horizontal, and the vertical central point of multiple vertical mounting plates 201 is located on a horizontal line.The vertical installation
Version and the specific thickness for being transversely mounted plate 202 can be depending on the intrinsic standing wave nodes in space.
In the embodiment of the present invention, multiple vertical mounting plates 201 are mounted on the wall by damping nail, and the damping nail can
Guarantee the vertical mounting plate 201 and wall without rigid contact.
300 millimeters of punchings are spaced since one end of length direction in each vertical mounting plate 201, and in each hole
Rubber pad is inside filled in, is fixed in the hole of the vertical mounting plate 201 with self-tapping screw nail 203 by plate 202 is transversely mounted, it is described
It is arranged with iron glue Composition spacer on the screw rod of self-tapping screw nail 203, in use, the iron glue Composition spacer is located at the laterally peace
Between loading board 202 and the nut of self-tapping screw nail 203.
In the embodiment of the present invention, the plate 202 that is transversely mounted is horizontally arranged on the vertical mounting plate 201, the cross
Length direction to mounting plate 202 is vertical with the length direction of the vertical mounting plate 201, the cross for being transversely mounted plate 202
The size in section is 20 millimeters * 30 millimeters, and the plate 202 that is transversely mounted is rough ground.As shown in figure 3, the vertical mounting plate
201 constitute a vertical fence, and two are transversely mounted plate 202 and respectively correspond two horizontal sides for being mounted on vertical fence
On.
By self-tapping screw nail 203 by first plate body 102 be fixedly mounted on it is described be transversely mounted on plate 202, it is described
The stacking of second plate body 103 is mounted on the one side of the separate metope of first plate body 102.
By sealing plate 104 by first plate body 102, second plate body 103, the vertical installation version and the cross
The closed sealing of surrounding of the resonant cavity formed to mounting plate 202 and metope.
Therefore, the rubber pad and the iron glue Composition spacer can reduce the first plate body 102 and the vibration of the second plate body 103
To the damage for being transversely mounted version when dynamic, play the role of buffering.
First plate body 102 before metope at a distance from be transversely mounted plate 202 and vertical mounting plate 201 thickness it
With as 50 millimeters, the value range of the thickness of first plate body 102 is 2.8 millimeters to 12.2 millimeters, can specifically be had
It is several below preferably to select:
When the glued board that the first plate body 102 is 12 millimeters, the plasterboard that the second plate body 103 is 9 millimeters, in small space
When standing wave frequency is between 29Hz to 49Hz, the combined plate body of first plate body 102 and the second plate body 103 can occur centainly
The vibration of displacement, especially when vibration of the standing wave frequency node between 30.945Hz to 36Hz and 40Hz to 48Hz is especially acute
It is strong, wherein when standing wave frequency is 33Hz, the vibration for the combined plate body that first plate body 102 and second plate body 103 are constituted
Dynamic acceleration, speed and displacement reach maximum value, i.e., best to the assimilation effect of the sound wave of 33Hz.Therefore, 12 millimeters of gluing
Standing wave frequency of the closed oscillation chamber of plate and 9 millimeters of plasterboard and the air layer composition between metope to small space sound field
Assimilation effect between 30.945Hz to 36Hz and 40Hz to 48Hz clearly, and to the standing wave frequency of small space sound field
Assimilation effect for the sound wave of 33Hz is best.
As shown in Figure 4, Figure 5 and Figure 6, abscissa indicates the frequency of sound wave, and ordinate indicates that the loudness of sound wave, unit are
Solid line in dB, Fig. 4 indicates that the actual measurement frequency response curve of the sound wave handled without the sound absorber, the dotted line in Fig. 4 indicate not
The frequency response curve of the sound wave handled through the sound absorber residual amount of energy after 250 milliseconds.Solid line in Fig. 5 indicates described in process
The actual measurement frequency response curve of sound absorber treated sound wave, the dotted line in Fig. 5 are indicated by the sound absorber treated sound
The frequency response curve of wave residual amount of energy after 250 milliseconds.In Fig. 6, solid line indicates the reality of the sound wave handled without the sound absorber
Frequency response curve is surveyed, dotted line indicates the actual measurement frequency response curve of the sound wave handled through the sound absorber.
As seen from Figure 4, the sound wave without sound absorber processing has extremely strong standing wave energy to hold in 31Hz or so
It is continuous, and entire ultralow frequency almost is difficult to dissipate in 250 milliseconds of self-energys, comparison diagram 4 and Fig. 5 can be seen that by the sound absorption
After device processing, decay to 56dB, attenuation 31dB from 84dB after 250 milliseconds in 30Hz standing wave node, and 30Hz with
Outer non-standing wave node almost decays to 40dB hereinafter, suitable with ambient noise.In addition to there are also extremely slight by 31Hz or so
Acoustic wave energy except, other frequencies completely consume completely.
Therefore, it is different that small spatial-acoustic problem is handled from the use sound-absorbing porous material of the prior art, sound-absorbing porous material
Volume is excessive to be compared, and the embodiment of the present invention passes through the resonance sound-absorbing of the first plate body 102, or passes through the first plate body 102 and second
The resonance sound-absorbing of the combination of plate body 103, it is entirely different with the principle of sound-absorbing porous material, it avoids existing using porous sound absorption material
Volume is excessive when material handles small spatial-acoustic problem.
In addition, the frequency for absorbing sound wave is related with the thickness of the first plate body 102, and one timing of thickness, the frequency that can be absorbed sound
Be it is certain, avoid the absorption of the sound to all frequencies, effectively avoid the taken in excess to sound frequency.In small spatial-acoustic
In can precisely for each space intrinsic standing wave node carry out acoustic energy consumption absorb, for example, being in the first plate body 102
In the case that the plasterboard that 12 millimeters of glued board and the second plate body 103 are 9 millimeters is combined into two-layer compound plate, small space
Woofer playback 25Hz to 40Hz low frequency audio sound when, two-layer compound plate provided in an embodiment of the present invention will
The resonance motion to match with frequency of sound wave occurs, acoustic wave energy is converted to the kinetic energy of physical vibration.It is double when frequency is 33Hz
Acceleration, speed and the displacement of layer composite board reach maximum value, confirm that the centre frequency of this two-layer compound plate is 33Hz, right
33Hz is that the sound wave of center frequency has strongest energy consumption.
In addition, those skilled in the art can readily occur on the basis of reading the embodiment of the present invention in addition to Fig. 1, Fig. 2
And the structure of the embodiment except Fig. 3, also, the material of first plate body 102 can also be glued board, hard fibre
The others material such as plate, plasterboard, parget water mud plate, metal plate or Europe deals, the material and thickness of specific first plate body 102
Selection, can according to the relational expression of the standing wave node in small space, the resonant frequency of the first plate body 102 of unlike material thickness with
And the thickness of air layer determines, therefore, all within the spirits and principles of the present invention, made any modification, equivalent replacement,
Improve etc., it should all be included in the protection scope of the present invention.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of sound absorber characterized by comprising seal assembly, braced frame and the first plate body, the braced frame peace
On metope, first plate body is mounted in the braced frame, first plate body, the metope and the support
The cavity that frame surrounds constitutes vibration chamber, and the seal assembly seals the vibration chamber；
Wherein, the seal assembly includes sealing plate, and the braced frame includes multiple vertical mounting plates, multiple vertical peaces
Loading board interval, which is mounted on the metope, constitutes vertical fence；
And the braced frame further include it is multiple be transversely mounted plate, it is multiple it is described be transversely mounted plate intervals be mounted on it is described perpendicular
Lateral fence is constituted on fence, first plate body is mounted on the lateral fence, and the vibration chamber is by described first
The cavity that plate body, the metope, the vertical fence and the lateral fence surround is constituted, and the vibration chamber is by described close
Sealing plate is sealed to airtight chamber；
And the one side stacking far from the metope of first plate body is equipped with the second plate body, the standing wave in space makes
First plate body and the second plate body combination vibration, will by the combination vibration of first plate body and second plate body
The standing wave absorbs.
2. sound absorber according to claim 1, which is characterized in that the vertical mounting plate is equipped with mounting hole, self tapping spiral shell
Adjusting screw pierces in the mounting hole, is plugged with rubber pad in the mounting hole.
3. -2 any sound absorber according to claim 1, which is characterized in that the value of the thickness of first plate body
Range is 2.8 millimeters to 12.2 millimeters.
4. sound absorber according to claim 3, which is characterized in that first plate body is glued board, first plate
Body with a thickness of 12 millimeters.
5. sound absorber according to claim 4, which is characterized in that second plate body is plasterboard, second plate
Body with a thickness of 9 millimeters, first plate body is glued board, and the value range of the thickness of first plate body is 2.8 millimeters and arrives
12.2 millimeters.
6. sound absorber according to claim 5, which is characterized in that first plate body with a thickness of 9 millimeters, 5 millimeters,
Either one or two of 3 millimeters and 12 millimeters.
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| CN201510336790.5A CN105161089B (en) | 2015-06-17 | 2015-06-17 | A kind of sound absorber |
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| CN201510336790.5A CN105161089B (en) | 2015-06-17 | 2015-06-17 | A kind of sound absorber |
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| CN105161089B true CN105161089B (en) | 2019-10-15 |
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Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1121364A (en) * | 1993-04-20 | 1996-04-24 | 弗兰霍菲尔运输应用研究公司 | False ceiling |
| CN2280393Y (en) * | 1997-03-20 | 1998-04-29 | 周家利 | Sound box |
| GB2345951A (en) * | 1999-01-19 | 2000-07-26 | Draftex Ind Ltd | Sound-absorbing structure |
| US6509081B1 (en) * | 2000-09-28 | 2003-01-21 | The Boeing Company | No-septum acoustic sandwich panel, and apparatus and method for suppressing noise in a nozzle |
| CN1879145A (en) * | 2003-11-11 | 2006-12-13 | 株式会社小松制作所 | Interior material, panel forming body, and manufacturing method for interior material |
| CN101460993A (en) * | 2006-07-20 | 2009-06-17 | 株式会社神户制钢所 | Solid-borne sound reduction structure |
| CN101499273A (en) * | 2008-02-01 | 2009-08-05 | 雅马哈株式会社 | Sound absorbing structure and vehicle component having sound absorbing properties |
| CN101533638A (en) * | 2008-05-04 | 2009-09-16 | 国网直流工程建设有限公司 | Sound absorber with resonator |
| CN101765037A (en) * | 2009-12-25 | 2010-06-30 | 国光电器股份有限公司 | Loudspeaker box with acoustic wave trap and method for absorbing medium-frequency standing wave thereof |
| CN101765039A (en) * | 2009-11-19 | 2010-06-30 | 王强 | Wine bucket shaped loudspeaker box |
| CN101944357A (en) * | 2010-08-27 | 2011-01-12 | 张宇 | Multi-module impedance compound sound insulation plate and manufacturing method thereof |
| CN102044239A (en) * | 2009-10-22 | 2011-05-04 | 北京绿创声学工程股份有限公司 | Micro-perforated plate with resonant sound absorption structure |
| CN202093817U (en) * | 2011-06-20 | 2011-12-28 | 四川正升声学科技有限公司 | Composite resonant sound absorption structure |
| CN202658756U (en) * | 2012-05-04 | 2013-01-09 | 薛小民 | Sound absorption material |
| CN103541450A (en) * | 2013-10-19 | 2014-01-29 | 宁夏天地经纬电力设备工程有限公司 | Transformer noise-absorbing denoising structure |
| CN204010668U (en) * | 2014-08-07 | 2014-12-10 | 四川正升声学科技有限公司 | Particle board resonance sound-absorbing structure |
| CN204695771U (en) * | 2015-06-17 | 2015-10-07 | 成都斯铂润音响设备有限公司 | A kind of sound absorber |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6329925B1 (en) * | 1999-11-24 | 2001-12-11 | Donnelly Corporation | Rearview mirror assembly with added feature modular display |
| JP2009198902A (en) * | 2008-02-22 | 2009-09-03 | Yamaha Corp | Sound absorbing structure, sound absorbing structure group, acoustic chamber, method of adjusting sound absorbing structure and noise reduction method |
| CN201687097U (en) * | 2010-04-22 | 2010-12-29 | 殷艺敏 | Noise-decreasing acoustic structure based on foamed ceramics sound-absorbing materials |
| CN201865276U (en) * | 2010-08-18 | 2011-06-15 | 广东省建筑装饰集团公司 | High-efficiency soft pack with sound absorption cavity structure |
| CN201883721U (en) * | 2010-11-18 | 2011-06-29 | 上海市电力公司 | Sound absorption structure for transformer substation |
| KR20140027984A (en) * | 2011-04-08 | 2014-03-07 | 가부시키가이샤 하우스 119 | Laminate structure of sound-absorbing material |
| CN202170576U (en) * | 2011-05-04 | 2012-03-21 | 张伟 | Bass trap |
| CN102912743B (en) * | 2012-09-21 | 2015-05-20 | 左洪运 | Environment-friendly type sound absorption barrier |
| CN202816349U (en) * | 2012-09-28 | 2013-03-20 | 简兆佳 | Structure of sound absorber |
| CN203049995U (en) * | 2012-12-20 | 2013-07-10 | 厦门嘉达声学技术工程有限公司 | Decorative compound sound absorption structure |
| CN203165456U (en) * | 2013-04-03 | 2013-08-28 | 简兆佳 | An improved sound absorbing device |
| CN103928221A (en) * | 2013-08-30 | 2014-07-16 | 国家电网公司 | Transformer noise-reduction combined sound absorbing device |
| CN203398525U (en) * | 2013-08-30 | 2014-01-15 | 国家电网公司 | Noise-reducing and sound-absorbing device for transformer substation |
| CN203729457U (en) * | 2014-01-24 | 2014-07-23 | 深圳市建筑装饰(集团)有限公司 | Novel sound absorption board structure |
-
2015
- 2015-06-17 CN CN201510336790.5A patent/CN105161089B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1121364A (en) * | 1993-04-20 | 1996-04-24 | 弗兰霍菲尔运输应用研究公司 | False ceiling |
| CN2280393Y (en) * | 1997-03-20 | 1998-04-29 | 周家利 | Sound box |
| GB2345951A (en) * | 1999-01-19 | 2000-07-26 | Draftex Ind Ltd | Sound-absorbing structure |
| US6509081B1 (en) * | 2000-09-28 | 2003-01-21 | The Boeing Company | No-septum acoustic sandwich panel, and apparatus and method for suppressing noise in a nozzle |
| CN1879145A (en) * | 2003-11-11 | 2006-12-13 | 株式会社小松制作所 | Interior material, panel forming body, and manufacturing method for interior material |
| CN101460993A (en) * | 2006-07-20 | 2009-06-17 | 株式会社神户制钢所 | Solid-borne sound reduction structure |
| CN101499273A (en) * | 2008-02-01 | 2009-08-05 | 雅马哈株式会社 | Sound absorbing structure and vehicle component having sound absorbing properties |
| CN101533638A (en) * | 2008-05-04 | 2009-09-16 | 国网直流工程建设有限公司 | Sound absorber with resonator |
| CN102044239A (en) * | 2009-10-22 | 2011-05-04 | 北京绿创声学工程股份有限公司 | Micro-perforated plate with resonant sound absorption structure |
| CN101765039A (en) * | 2009-11-19 | 2010-06-30 | 王强 | Wine bucket shaped loudspeaker box |
| CN101765037A (en) * | 2009-12-25 | 2010-06-30 | 国光电器股份有限公司 | Loudspeaker box with acoustic wave trap and method for absorbing medium-frequency standing wave thereof |
| CN101944357A (en) * | 2010-08-27 | 2011-01-12 | 张宇 | Multi-module impedance compound sound insulation plate and manufacturing method thereof |
| CN202093817U (en) * | 2011-06-20 | 2011-12-28 | 四川正升声学科技有限公司 | Composite resonant sound absorption structure |
| CN202658756U (en) * | 2012-05-04 | 2013-01-09 | 薛小民 | Sound absorption material |
| CN103541450A (en) * | 2013-10-19 | 2014-01-29 | 宁夏天地经纬电力设备工程有限公司 | Transformer noise-absorbing denoising structure |
| CN204010668U (en) * | 2014-08-07 | 2014-12-10 | 四川正升声学科技有限公司 | Particle board resonance sound-absorbing structure |
| CN204695771U (en) * | 2015-06-17 | 2015-10-07 | 成都斯铂润音响设备有限公司 | A kind of sound absorber |
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|---|---|
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