CN106917457A - low-frequency resonance sound absorption structure - Google Patents
low-frequency resonance sound absorption structure Download PDFInfo
- Publication number
- CN106917457A CN106917457A CN201510985133.3A CN201510985133A CN106917457A CN 106917457 A CN106917457 A CN 106917457A CN 201510985133 A CN201510985133 A CN 201510985133A CN 106917457 A CN106917457 A CN 106917457A
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- CN
- China
- Prior art keywords
- sound
- steel plate
- absorbing material
- elastic
- low
- 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.)
- Granted
Links
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 42
- 239000010959 steel Substances 0.000 claims abstract description 42
- 239000011358 absorbing material Substances 0.000 claims abstract description 36
- 238000013016 damping Methods 0.000 claims abstract description 17
- 238000005034 decoration Methods 0.000 claims abstract description 15
- 238000009434 installation Methods 0.000 claims abstract description 14
- 239000000853 adhesive Substances 0.000 claims abstract description 4
- 230000001070 adhesive effect Effects 0.000 claims abstract description 4
- 239000002344 surface layer Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 5
- 229920000742 Cotton Polymers 0.000 claims description 3
- 229920000877 Melamine resin Polymers 0.000 claims description 3
- 239000010960 cold rolled steel Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 238000005187 foaming Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 239000002984 plastic foam Substances 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- -1 melamine Amine Chemical class 0.000 claims 1
- 239000010410 layer Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 206010057071 Rectal tenesmus Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 208000012271 tenesmus Diseases 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/8209—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only sound absorbing devices
Abstract
The present invention discloses a kind of low-frequency resonance sound absorption structure, it is made up of elastic sheet, elastic sound-absorbing material, steel plate framework, stiff baseplate, damping nail, installation component, decoration angle, stiff baseplate is arranged on steel plate framework bottom, damping nail is arranged on stiff baseplate in elastic sound-absorbing material with array arrangement, elastic sound-absorbing material is higher by steel plate framework plane, elastic sheet is arranged on elastic sound-absorbing material, and decoration angle is arranged on steel plate framework top；Described elastic sound-absorbing material and stiff baseplate, damping nail, between steel plate framework, elastic sheet by adhesive connection, elastic sound-absorbing material surface layer is higher by steel plate framework；Described elastic sheet and steel plate framework, decoration leave gap between angle.Low-frequency sound wave, absorption band can effectively be absorbed by width.It is suitable for the low frequency absorption body that the occasions such as home theater, recording studio, anechoic room, music hall are used.
Description
Technical field
The present invention relates to a kind of sound absorption structure, the low-frequency resonance sound absorption structure of low-frequency sound wave can be especially absorbed.
Background technology
Low-frequency sound wave problem is difficult to control to.For example, the building element of double-layer structural, such as window, door or partition wall, these components exist
The oise insulation factor of medium-high frequency is general all higher, therefore the oise insulation factor of Rating of the single value is all good, but is quality on its construction --- bullet
Spring system, its resonant frequency is likely in 100Hz or so or lower so that near the frequency, from high sound level side to
In a low voice in the transmitting procedure of level side, the actual oise insulation factor of all-bottom sound is very low, in addition behind the incoming interior of all-bottom sound, has more excited room
Interior normal mode vibration, and cause that indoor part low frequency reaches reinforcement.The size in room, if at least one direction is less than
5m, the performance of normal mode vibration is apparent.In venue acoustics design, the harmony of the control of low frequency reverberation time to the reverberation time
It is most important.
Due to the low frequency absorption poor performance of porous material, in solving the problems, such as, low frequency absorption, often using resonance sound-absorbing
Structure.When the frequency of incident acoustic wave and the consistent intrinsic frequency of resonance sound-absorbing structure, resonance sound-absorbing structure will resonate
There is absworption peak centered on resonant frequency in phenomenon, its Sound absorbing spectrum, and when away from resonant frequency, acoustic absorptivity is just very low.By
In low-frequency sound wave excitation resonance easier than high frequency sound wave, therefore resonance sound-absorbing structure its main sound sucting band is in low frequency.In reality
Using upper, resonance sound-absorbing structure has cavity resonance sound absorption structure, resonance sound-absorbing structure for sheet, film resonance sound-absorbing structure, perforation
Plate resonance sound-absorbing structure, microperforated panel resonance sound-absorbing structure.
Imperforate thin plate（Such as metallic plate, glued board, plastic plate）Periphery is fixed on framework, is left behind certain
The air layer of thickness, this just constitutes resonance sound-absorbing structure for sheet., equivalent to mass, the air layer after plate is equivalent to bullet for thin plate
Spring.When sound wave effect is in thin sheet surface, the flexural vibrations of thin plate are caused under the alternation effect of acoustic pressure.Due to thin plate and fixation
The interior frictional dissipation caused inside friction and thin plate between fulcrum, makes the kinetic energy of vibration be converted into heat energy and acoustic energy is declined
Subtract.When the frequency of incident acoustic wave and the consistent intrinsic frequency of resonance sound-absorbing structure, it is existing that resonance sound-absorbing structure will occur resonance
As.
At present, the internal diameter size of the low-frequency sound wave absorption plant of architectural acoustics be absorbed peak low band wavelength four/
For the moment, acoustic absorptivity highest.Because the wavelength of low frequency band is long, if to reach the effective absorption to low frequency band, sound absorption knot
The physical dimension of structure is just higher than a quarter of absorbed peak low band wavelength, the thin plate resonance sound-absorbing knot for causing periphery to be fixed
Structure specification is larger.Failing to considering to set the thin plate resonance sound-absorbing knot of dimension in metope and top in advance in decoration stage
Structure, is just relatively difficult to treatment during use.
The content of the invention
Especially facilitate in use and set not by specification limitation is set it is an object of the invention to provide a kind of,
The resonance sound-absorbing structure of the wideband low frequency absorption not limited to by mounting condition.
The technical solution adopted for the present invention to solve the technical problems is：A kind of low-frequency resonance sound absorption structure, by Thin Elastic
Plate, elastic sound-absorbing material, steel plate framework, stiff baseplate, damping nail, installation component, decoration angle composition, stiff baseplate are arranged on steel
Plate framework bottom, damping nail is arranged on stiff baseplate in elastic sound-absorbing material with array arrangement, and elastic sound-absorbing material is higher by
Steel plate framework plane, elastic sheet is arranged on elastic sound-absorbing material, and decoration angle is arranged on steel plate framework top；Elastic sheet is not
Fixed pivot is set, and when on sound wave incident to elastic sheet, elastic sheet occurs plate under the exciting of sound wave alternating pressure
Flexural deformation, because the frictional damping loss between plate and elastic sound-absorbing material, and elastic sheet internal friction in itself are damaged
Consumption, makes the mechanical energy of sound wave be changed into heat energy, so that sound energy consumption reaches the purpose of sound absorption.Acoustic wave transmission enters elasticity sound absorption material
During material, stiff baseplate is entered again after reflection, refraction between the elastic sound-absorbing material between elastic sheet and stiff baseplate, due to
The surface density of stiff baseplate is higher, can absorb the low-frequency sound wave less than elastic sheet.Elasticity is arranged on using elastic sound-absorbing material
Between thin plate and stiff baseplate, the absorption to low-frequency sound wave is far above corresponding cavity, it is ensured that the spectrum width of absorption.
Described elastic sound-absorbing material and stiff baseplate, damping nail, between steel plate framework, elastic sheet by adhesive company
Connect.Damping of the elastic sound-absorbing material to elastic sheet can be effectively improved；Damping nail is set inside elastic sound-absorbing material, can be with
Increase the damping of elastic sound-absorbing material, elastic sheet produces tenesmus existing during preventing low-frequency resonance sound absorption structure from installing and using
As, it is ensured that the bond strength of elastic sound-absorbing material and elastic sheet.
Described elastic sheet and steel plate framework, decoration leave gap between angle.Because elastic sound-absorbing material is higher by steel plate
Frame plane, elastic sheet and steel plate framework, decoration leave gap between angle.Between elastic sheet and steel plate framework, decoration angle
Non- directly contact, forms elastic sheet and swims on elastic sound-absorbing material.Because elastic sheet is not provided with fixed pivot, so,
The frequency for being absorbed is not restricted by the fixed pivot of framework keel spacing, can be absorbed sound less than the octave center of keel spacing
The low-frequency sound wave of the wavelength of frequency.
Described elastic sheet system thickness is the modeling of the cold-rolled steel sheet or stainless steel plate or equal surface density of 0.5~2mm
Flitch is made.The smooth panel of elastic sheet system, centering high frequency sound wave is difficult to absorb, and prevents the excessive absorption of centering high frequency sound wave
Cause to influence the straight of RMR room reverb curve.The surface density of low-frequency resonance sound absorption structure elastic sheet should be true according to institute's absorption frequency
It is fixed.According to the resonant frequency of resonance sound-absorbing structure（Hz）May be calculated as：
In formula：M --- thin plate surface density；Kg/m²
D --- air layer thickness；cm
ρ --- atmospheric density；Kg/m²
C --- the velocity of sound；34400cm/s.
Described steel plate framework is folded by the plane steel plate or perforated plate of 2~3mm and formed.Tied when multiple low-frequency resonances absorb sound
Against when installing between structure, steel plate framework is made up of plane steel plate, when low-frequency resonance sound absorption structure is independently installed or gap is installed
When, steel plate framework is formed for perforated plate is folded.The punching rate of perforated folded plate and aperture should determine according to institute's absorption frequency.
The resonant frequency of perforated plate（Hz）May be calculated as：
In formula：L --- air layer thickness after plate；cm
The effective length in t --- aperture；cm
D --- aperture；cm
C --- the velocity of sound；34400cm/s
P --- punching rate.
Described elastic sound-absorbing material is melamine foaming sound absorption cotton, expanded plastic foam material, fiber sound absorption plate.Described
Installation component is arranged on stiff baseplate bottom, and installation component is made up of mounting suspension member or installation hanging piece.
It is wide the beneficial effects of the invention are as follows can effectively absorb low-frequency sound wave, absorption band.It is suitable for home theater, record
The low frequency absorption body that the occasions such as sound canopy, anechoic room, music hall are used.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the positive insight structural map of first embodiment of the invention.
Fig. 2 is the sectional view of Fig. 1.
Fig. 3 is the partial enlarged drawing of second embodiment of the invention.
1. elastic sheet in figure, 2. elastic sound-absorbing material, 3. steel plate framework, 4. stiff baseplate, 5. damping nail, 6. decorates
Angle, 7. installation component, 8. plane steel plate, 9. perforated plate.
Specific embodiment
In the embodiment shown in Fig. 1,2, a kind of low-frequency resonance sound absorption structure, by elastic sheet（1）, elastic sound-absorbing material
（2）, steel plate framework（3）, stiff baseplate（4）, damping nail（5）, decoration angle（6）, installation component（7）Composition, stiff baseplate（4）Peace
Mounted in steel plate framework（3）Bottom, damping nail（5）Stiff baseplate is arranged on array arrangement（4）Upper elastic sound-absorbing material（2）
In, elastic sound-absorbing material（2）It is higher by steel plate framework（3）Plane, elastic sheet（1）Installed in elastic sound-absorbing material（2）On, decoration
Angle（6）Installed in steel plate framework（3）Top；Described elastic sound-absorbing material（2）With stiff baseplate（4）, damping nail（5）, steel plate
Framework（3）, elastic sheet（1）Between by adhesive connect, elastic sound-absorbing material（2）Surface layer is higher by steel plate framework（3）；It is described
Elastic sheet（1）With steel plate framework（3）, decoration angle（6）Between leave gap.
Described elastic sheet（1）It is cold-rolled steel sheet, stainless steel plate or equal surface density that thickness is 0.5~2mm
Plastic plate is made.Described steel plate framework（3）By the plane steel plate of 2~3mm（8）It is made.Described elastic sound-absorbing material（2）For
Melamine foaming sound absorption cotton, expanded plastic foam material, fiber sound absorption plate.Described installation component（7）Installed in stiff baseplate（4）
Bottom, installation component（7）System is made up of mounting suspension member or installation hanging piece.
In second embodiment shown in Fig. 3, when low-frequency resonance sound absorption structure is independently installed or gap is installed, steel plate
Framework is perforated plate（9）Folded plate is made.
It should be appreciated that without departing from the scope of the present invention, various changes can be made to above-described embodiment.It is all in this hair
Any modification, equivalent and improvement made within bright spirit and principle etc., should be included in protection scope of the present invention
Within.
Claims (5)
1. a kind of low-frequency resonance sound absorption structure, by elastic sheet, elastic sound-absorbing material, steel plate framework, stiff baseplate, damping nail,
Installation component, decoration angle composition, it is characterized in that：Stiff baseplate is arranged on steel plate framework bottom, and damping nail is arranged with array pacifies
On stiff baseplate in elastic sound-absorbing material, elastic sound-absorbing material is higher by steel plate framework plane, and elastic sheet is arranged on elasticity
On sound-absorbing material, decoration angle is arranged on steel plate framework top；Described elastic sound-absorbing material and stiff baseplate, damping nail, steel plate
Connected by adhesive between framework, elastic sheet, elastic sound-absorbing material surface layer is higher by steel plate framework；Described elastic sheet with
Steel plate framework, decoration leave gap between angle.
2. low-frequency resonance sound absorption structure according to claim 1, it is characterized in that：Described elastic sheet is that thickness is 0.5
The plastic plate of the cold-rolled steel sheet, stainless steel plate or equal surface density of~2mm is made.
3. low-frequency resonance sound absorption structure according to claim 1, it is characterized in that：Described steel plate framework is by the flat of 2~3mm
Face steel plate or perforated plate are folded and formed.
4. low-frequency resonance sound absorption structure according to claim 1, it is characterized in that：Described elastic sound-absorbing material is melamine
Amine foaming sound absorption cotton, expanded plastic foam material, fiber sound absorption plate.
5. low-frequency resonance sound absorption structure according to claim 1, it is characterized in that：Described installation component is arranged on rigid bottom
Plate bottom, installation component is made up of mounting suspension member or installation hanging piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510985133.3A CN106917457B (en) | 2015-12-25 | 2015-12-25 | Low-frequency resonance sound absorption structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510985133.3A CN106917457B (en) | 2015-12-25 | 2015-12-25 | Low-frequency resonance sound absorption structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106917457A true CN106917457A (en) | 2017-07-04 |
| CN106917457B CN106917457B (en) | 2019-04-23 |
Family
ID=59457192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510985133.3A Active CN106917457B (en) | 2015-12-25 | 2015-12-25 | Low-frequency resonance sound absorption structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN106917457B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707060A (en) * | 2018-12-28 | 2019-05-03 | 西安交通大学 | A kind of continuous flaring gradient aperture basis of dual porosity rate sound absorber and its application |
| CN110459393A (en) * | 2019-08-02 | 2019-11-15 | 全球能源互联网研究院有限公司 | A kind of sound absorption composite members and a kind of transformer |
| CN112164383A (en) * | 2020-09-07 | 2021-01-01 | 南京航空航天大学 | Underwater sound absorption structure with sine partition board filled with viscoelastic material |
| CN112185327A (en) * | 2020-09-16 | 2021-01-05 | 西安交通大学 | Micro-seam low-frequency sound absorption unit and nested broadband sound absorption structure with same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10245823A (en) * | 1997-03-07 | 1998-09-14 | Nok Megurasutikku Kk | Noise absorbing structure |
| CN2895574Y (en) * | 2006-05-22 | 2007-05-02 | 李承德 | Cantilever flat-board resonance sound-absorbing body |
| CN102298924A (en) * | 2011-09-02 | 2011-12-28 | 周国柱 | Sound-absorbing structure |
| CN203977620U (en) * | 2014-06-25 | 2014-12-03 | 邓军辉 | The light steel wall of sound insulation |
| CN204059640U (en) * | 2014-06-03 | 2014-12-31 | 西安锦运泰声学环保科技有限公司 | A kind of suspended absorber |
-
2015
- 2015-12-25 CN CN201510985133.3A patent/CN106917457B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10245823A (en) * | 1997-03-07 | 1998-09-14 | Nok Megurasutikku Kk | Noise absorbing structure |
| CN2895574Y (en) * | 2006-05-22 | 2007-05-02 | 李承德 | Cantilever flat-board resonance sound-absorbing body |
| CN102298924A (en) * | 2011-09-02 | 2011-12-28 | 周国柱 | Sound-absorbing structure |
| CN204059640U (en) * | 2014-06-03 | 2014-12-31 | 西安锦运泰声学环保科技有限公司 | A kind of suspended absorber |
| CN203977620U (en) * | 2014-06-25 | 2014-12-03 | 邓军辉 | The light steel wall of sound insulation |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707060A (en) * | 2018-12-28 | 2019-05-03 | 西安交通大学 | A kind of continuous flaring gradient aperture basis of dual porosity rate sound absorber and its application |
| CN110459393A (en) * | 2019-08-02 | 2019-11-15 | 全球能源互联网研究院有限公司 | A kind of sound absorption composite members and a kind of transformer |
| CN112164383A (en) * | 2020-09-07 | 2021-01-01 | 南京航空航天大学 | Underwater sound absorption structure with sine partition board filled with viscoelastic material |
| CN112164383B (en) * | 2020-09-07 | 2023-07-25 | 南京航空航天大学 | Underwater sound absorption structure with sine partition plate filled with viscoelastic material |
| CN112185327A (en) * | 2020-09-16 | 2021-01-05 | 西安交通大学 | Micro-seam low-frequency sound absorption unit and nested broadband sound absorption structure with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106917457B (en) | 2019-04-23 |
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