CN106917457B - Low-frequency resonance sound absorption structure - Google Patents
Low-frequency resonance sound absorption structure Download PDFInfo
- Publication number
- CN106917457B CN106917457B CN201510985133.3A CN201510985133A CN106917457B CN 106917457 B CN106917457 B CN 106917457B CN 201510985133 A CN201510985133 A CN 201510985133A CN 106917457 B CN106917457 B CN 106917457B
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- Prior art keywords
- sound
- steel plate
- elastic
- absorbing material
- low
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- 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 16
- 238000009434 installation Methods 0.000 claims abstract description 16
- 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
- 238000005452 bending Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 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
- 238000005265 energy consumption Methods 0.000 description 1
- 239000002184 metal Substances 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
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Building Environments (AREA)
Abstract
The present invention discloses a kind of low-frequency resonance sound absorption structure, it is made of elastic sheet, elastic sound-absorbing material, steel plate framework, stiff baseplate, damping nail, installation component, decoration angle, stiff baseplate is mounted on steel plate framework bottom, damping nail is mounted 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 mounted on elastic sound-absorbing material, and decoration angle is mounted on steel plate framework top；The elastic sound-absorbing material and stiff baseplate, damping nail, steel plate framework, between elastic sheet by adhesive connection, elastic sound-absorbing material surface layer is higher by steel plate framework；There are gaps between the elastic sheet and steel plate framework, decoration 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 use.
Description
Technical field
The present invention relates to a kind of sound absorption structures, can especially absorb the low-frequency resonance sound absorption structure of low-frequency sound wave.
Background technique
Low-frequency sound wave problem is difficult to control.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 generally all higher, therefore the oise insulation factor of Rating of the single value is all good, but it is structurally quality --- bullet
Spring system, its resonant frequency are likely in 100Hz or so or lower so that near the frequency, from high sound level side to
In a low voice in the transmission process of grade side, the actual oise insulation factor of all-bottom sound is very low, furthermore behind the incoming interior of all-bottom sound, has more excited room
Interior normal mode vibration, and indoor part low frequency is made to reach reinforcement.The size in room, if at least one direction is less than
The performance of 5m, normal mode vibration are apparent.In venue acoustics design, the harmony of the control of low frequency reverberation time to the reverberation time
It is most important.
Since the low frequency absorption performance of porous material is poor, in solving the problems, such as, low frequency absorption, often use resonance sound-absorbing
Structure.When the frequency of incident acoustic wave is consistent with the intrinsic frequency of resonance sound-absorbing structure, resonance sound-absorbing structure will resonate
There is absorption peak centered on resonant frequency in phenomenon, Sound absorbing spectrum, and when far 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 metal plate, glued board, plastic plate) periphery is fixed on frame, there are certain behind
The air layer of thickness, this just constitutes resonance sound-absorbing structure for sheet.Thin plate is equivalent to mass block, and the air layer after plate is equivalent to bullet
Spring.When sound wave effect is when thin sheet surface, the bending vibration of thin plate is caused under the alternation effect of acoustic pressure.Due to thin plate and fixation
Interior frictional dissipation caused by inside friction and thin plate between fulcrum, enables the kinetic energy of vibration to be converted into thermal energy and sound is made to be declined
Subtract.When the frequency of incident acoustic wave is consistent with the intrinsic frequency of resonance sound-absorbing structure, it is existing that resonance will occur for resonance sound-absorbing structure
As.
Currently, the internal diameter of the low-frequency sound wave absorption plant of architectural acoustics be absorbed peak low band wavelength four/
For the moment, acoustic absorptivity highest.Since the wavelength of low frequency band is long, if to reach effective absorption to low frequency band, sound absorption knot
The geometric 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 fixed
Structure specification is larger.If failing to consider the thin plate resonance sound-absorbing knot in metope and top setting dimension in advance in decoration stage
Structure just compares in use process and is difficult to handle.
Summary of the invention
Do not limited to by setting specification the purpose of the present invention is to provide a kind of, especially facilitate setting in use,
The resonance sound-absorbing structure for the wideband low frequency absorption not limited to by mounting condition.
The technical solution adopted by 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 mounted on steel
Plate framework bottom, damping nail are mounted 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 are mounted on elastic sound-absorbing material, and decoration angle is mounted on steel plate framework top；Elastic sheet is not
Fixed pivot is set, and when on sound wave incident to elastic sheet, elastic sheet makes plate under the excitation of sound wave alternating pressure
Bending deformation, due to the frictional damping loss and the internal friction of elastic sheet damage itself between plate and elastic sound-absorbing material
Consumption, makes the mechanical energy of sound wave be changed into thermal energy, so that sound energy consumption achievees the purpose that sound absorption.Acoustic wave transmission enters elasticity sound absorption material
After when material, reflecting, reflecting between the elastic sound-absorbing material between elastic sheet and stiff baseplate and enter stiff baseplate, due to
The surface density of stiff baseplate is higher, can absorb the low-frequency sound wave lower than elastic sheet.It is arranged using elastic sound-absorbing material in elasticity
Between thin plate and stiff baseplate, corresponding cavity is much higher than to the absorption of low-frequency sound wave, guarantees the spectrum width absorbed.
The elastic sound-absorbing material and stiff baseplate, steel plate framework, pass through adhesive company between elastic sheet at damping nail
It connects.It can effectively improve damping of the elastic sound-absorbing material to elastic sheet；The setting damping nail inside elastic sound-absorbing material, can be with
Increase the damping of elastic sound-absorbing material, it is existing to generate tenesmus for elastic sheet during preventing low-frequency resonance sound absorption structure from installing and using
As guaranteeing the bond strength of elastic sound-absorbing material and elastic sheet.
There are gaps between the elastic sheet and steel plate framework, decoration angle.Since elastic sound-absorbing material is higher by steel plate
There are gaps between frame plane, elastic sheet and steel plate framework, decoration angle.Between elastic sheet and steel plate framework, decoration angle
It does not contact directly, forms elastic sheet and swim on elastic sound-absorbing material.Since elastic sheet is not provided with fixed pivot, so,
The frequency absorbed is not restricted by the fixed pivot of frame keel spacing, can absorb the octave center lower than keel spacing
The low-frequency sound wave of the wavelength of frequency.
The elastic sheet system is with a thickness of the cold-rolled steel sheet or stainless steel plate of 0.5~2mm or the modeling of equal surface density
Flitch is made.The smooth panel of elastic sheet system, centering high frequency sound wave are difficult to absorb, and prevent 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.It may be calculated as according to the resonant frequency (Hz) of resonance sound-absorbing structure:
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.
The steel plate framework is folded by the plane steel plate or perforated plate of 2~3mm.It is tied when multiple low-frequency resonances absorb sound
When between structure against installation, steel plate framework is made of plane steel plate, when low-frequency resonance sound absorption structure is independently installed or gap installation
When, steel plate framework is that perforated plate folds.The punching rate of perforated folded plate and aperture should be determined according to institute's absorption frequency.
The resonant frequency (Hz) of perforated plate 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.
The elastic sound-absorbing material is melamine foaming sound absorption cotton, expanded plastic foam material, fiber sound absorption plate.Described
Installation component is mounted on stiff baseplate lower part, and installation component is made 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 use.
Detailed description of the invention
Present invention will be further explained below with reference to the attached 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 view of second embodiment of the invention.
1. elastic sheet in figure, 2. elastic sound-absorbing materials, 3. steel plate frameworks, 4. stiff baseplates, 5. damping nails, 6. decorations
Angle, 7. installation components, 8. plane steel plates, 9. perforated plates.
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) is mounted on stiff baseplate (4) elastic sound-absorbing material (2) with array arrangement
In, elastic sound-absorbing material (2) is higher by steel plate framework (3) plane, and elastic sheet (1) is mounted on elastic sound-absorbing material (2), decoration
Angle (6) is mounted on steel plate framework (3) top；The elastic sound-absorbing material (2) and stiff baseplate (4), damping nail (5), steel plate
It is connected between frame (3), elastic sheet (1) by adhesive, elastic sound-absorbing material (2) surface layer is higher by steel plate framework (3)；It is described
Elastic sheet (1) and steel plate framework (3), decoration angle (6) between there are gaps.
The elastic sheet (1) is with a thickness of the cold-rolled steel sheet of 0.5~2mm, stainless steel plate or equal surface density
Plastic plate is made.The steel plate framework (3) is made of the plane steel plate (8) of 2~3mm.The elastic sound-absorbing material (2) is
Melamine foaming sound absorption cotton, expanded plastic foam material, fiber sound absorption plate.The installation component (7) is mounted on stiff baseplate (4)
Lower part, installation component (7) system are made 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
Frame is made of perforated plate (9) folded plate.
It should be appreciated that without departing from the scope of the present invention, a variety of changes can be made to above-described embodiment.It is all in this hair
Made any modifications, equivalent replacements, and improvements etc., should be included in protection scope of the present invention within bright spirit and principle
Within.
Claims (5)
1. a kind of low-frequency resonance sound absorption structure, followed closely by elastic sheet, elastic sound-absorbing material, steel plate framework, stiff baseplate, damping,
Installation component, decoration angle composition, it is characterized in that: stiff baseplate is mounted on steel plate framework bottom, 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 mounted on elasticity
On sound-absorbing material, decoration angle is mounted on steel plate framework top；The elastic sound-absorbing material and stiff baseplate, damping nail, steel plate
It is connected between frame, elastic sheet by adhesive, elastic sound-absorbing material surface layer is higher by steel plate framework；The elastic sheet with
There are gaps between steel plate framework, decoration angle.
2. low-frequency resonance sound absorption structure according to claim 1, it is characterized in that: the elastic sheet is with a thickness of 0.5
The plastic plate of the cold-rolled steel sheet of~2mm, stainless steel plate or equal surface density is made.
3. low-frequency resonance sound absorption structure according to claim 1, it is characterized in that: the steel plate framework is by the flat of 2~3mm
Face steel plate or perforated plate fold.
4. low-frequency resonance sound absorption structure according to claim 1, it is characterized in that: the 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: the installation component is mounted on rigid bottom
Plate lower part, installation component are made 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 CN106917457A (en) | 2017-07-04 |
| CN106917457B true CN106917457B (en) | 2019-04-23 |
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ID=59457192
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| 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) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707060B (en) * | 2018-12-28 | 2020-05-22 | 西安交通大学 | Continuous divergent gradient open-pore double-porosity sound absorption device and application thereof |
| 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 |
| 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 |
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 |
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| Publication number | Publication date |
|---|---|
| CN106917457A (en) | 2017-07-04 |
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