CN106481385A - A kind of little volume noise elimination structure of the wideband based on acoustic metamaterial - Google Patents
A kind of little volume noise elimination structure of the wideband based on acoustic metamaterial Download PDFInfo
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- CN106481385A CN106481385A CN201610957542.7A CN201610957542A CN106481385A CN 106481385 A CN106481385 A CN 106481385A CN 201610957542 A CN201610957542 A CN 201610957542A CN 106481385 A CN106481385 A CN 106481385A
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- thin
- film material
- noise elimination
- described thin
- cavity
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Links
- 230000008030 elimination Effects 0.000 title claims abstract description 36
- 238000003379 elimination reaction Methods 0.000 title claims abstract description 36
- 239000010409 thin film Substances 0.000 claims abstract description 94
- 239000000463 material Substances 0.000 claims abstract description 78
- 229920000742 Cotton Polymers 0.000 claims abstract description 14
- 239000012528 membrane Substances 0.000 claims description 7
- 244000043261 Hevea brasiliensis Species 0.000 claims description 3
- 229920003052 natural elastomer Polymers 0.000 claims description 3
- 229920001194 natural rubber Polymers 0.000 claims description 3
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 239000004945 silicone rubber Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 230000003584 silencer Effects 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 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
- 239000012858 resilient material Substances 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/082—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases passing through porous members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
- F01N1/04—Silencing apparatus characterised by method of silencing by using resonance having sound-absorbing materials in resonance chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1205—Flow throttling or guiding
- F02M35/1216—Flow throttling or guiding by using a plurality of holes, slits, protrusions, perforations, ribs or the like; Surface structures; Turbulence generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1272—Intake silencers ; Sound modulation, transmission or amplification using absorbing, damping, insulating or reflecting materials, e.g. porous foams, fibres, rubbers, fabrics, coatings or membranes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2210/00—Combination of methods of silencing
- F01N2210/04—Throttling-expansion and resonance
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses a kind of little volume noise elimination structure of the wideband based on acoustic metamaterial, including the housing with hollow cavity, in hollow cavity and run through housing ends poling, it is set in the thin film sleeve outside poling, fixation is located at the resilient thin-film material of tool and the fixing mass being located on thin-film material on thin film sleeve, poling inner chamber forms the first cavity, form the second cavity between poling outer wall and thin film sleeve inwall, poling is provided with the through hole of multiple connection the first cavity and the second cavity, it is filled with acoustical cotton in second cavity, thin-film material and mass are equipped with multiple, and thin-film material and mass correspond setting, spring-mass unit is constituted between thin-film material and mass.This noise elimination structure eliminates the Middle and low frequency noise in air-flow by thin film acoustic metamaterial, eliminates the high-frequency noise in air-flow by resistive material, while greatly reducing acoustic filter noise elimination volume, and has preferable soundproof effect.
Description
Technical field
Present invention relates particularly to sound absorption technical field of acoustics is and in particular to a kind of little volume of wideband based on acoustic metamaterial
Noise elimination structure.
Background technology
Acoustic filter be a kind of air-flow not only can have been made to pass through but also the equipment of noise can be effectively reduced, be control air force
The effective tool of noise.Generally acoustic filter can be divided into passive acoustic filter according to noise-cancelling theory（Passive acoustic filter）, actively eliminate the noise
Device（Active silencer）And semi-active muffler（Bimodulus acoustic filter）.In passive acoustic filter, acoustic energy can be reflected by structure or inhale
Sound absorbed；Active silencer has an electronic control system for producing and opposite in phase equal with sound source magnitudes of acoustic waves
Infrasonic wave, reaches soundproof effect by sound wave interference；Semi-active muffler embeds passive control device, when air-flow changes
When, the soundproof effect of acoustic filter can be adjusted by air-flow, such as bimodulus acoustic filter.
In air inlet system and exhaust system, because active silencer and semi-active muffler cost are very high, in practical engineering application absolutely
Great majority are all passive acoustic filters.Passive acoustic filter is divided into dissipative muffler and reactive muffler, and reactive muffler is mainly with sound
Resistance principle is used for eliminating Middle and low frequency noise, such as Helmholtz acoustic filter and expansion muffler.Dissipative muffler is using in pipe
Lay sound-absorbing material on road wall or in its passage to eliminate high-frequency noises.
Engine breathing noise is generally made up of the order noise of medium and low frequency and the noise that fires of high frequency, and institute is for it
The acoustic filter of exploitation mostly is Broad Band Muffler, generally uses helmholtz resonance chamber and is used for eliminating low frequency and make an uproar in prior art
Sound, eliminates mid-frequency noise using piercing member and expansion cavity, eliminates high-frequency noises using resistive material, this acoustic filter its disappear
Sound device volume is usually 15-18 times of engine displacement, especially low-frequency noise it is necessary to there be enough noise elimination volumes right
It is eliminated, and this is also the difficult point under limited noise elimination volume, low-frequency noise being optimized in prior art.
Content of the invention
The technical problem to be solved is for problem of the prior art, provides a kind of volume less based on sound
Learn the wideband little volume noise elimination structure of Meta Materials.
For reaching above-mentioned purpose, the technical solution used in the present invention is：
A kind of little volume noise elimination structure of the wideband based on acoustic metamaterial, including the housing with hollow cavity, described noise elimination knot
Structure also include in the hollow cavity of described housing and run through the ends that described housing is gone up along its length poling,
In the hollow cavity of described housing and be set in the thin film sleeve of outside of described poling, be fixedly installed on described thin-film covering
The resilient thin-film material of tool on cylinder and the mass being fixedly installed on described thin-film material, the inner chamber of described poling is formed
First cavity, forms the second cavity between the inwall of the outer wall of described poling and described thin film sleeve, described poling is provided with many
The individual through hole for connecting described first cavity and described second cavity, is filled with described second cavity and is made up of resistive material
Acoustical cotton, described thin-film material and described mass are equipped with multiple, and described thin-film material and a pair of described mass 1
Should arrange, between described thin-film material and described mass, constitute spring mass unit.
Preferably, packed density in described second cavity for the described acoustical cotton is 80g/L.
Preferably, described thin-film material at least has a kind of specification, and the described thin-film material of every kind of specification has multiple, often
Plant and between the described thin-film material of specification and described mass, constitute the spring mass unit with certain frequency.
Further, described thin-film material has four kinds of specifications, and the described thin-film material of every kind of specification is provided with six, four kinds
The bullet with 63Hz, 125Hz, 250Hz and 500Hz frequency is respectively constituted between the described thin-film material of specification and described mass
Spring-mass unit.
Further, the described thin-film material of different size is spaced apart along the length bearing of trend of described thin film sleeve,
The described thin-film material of specification of the same race is multiple circumferentially spaced along described thin film sleeve.
Preferably, described thin-film material is provided with the installing hole that multiple and described thin-film material matches, and each is described thin
Membrane material is fixedly installed in a described installing hole.
Preferably, described mass is arranged on the center position of described thin-film material.
Preferably, described thin-film material is made up of Natural rubber or silicone rubber SR.
Preferably, described thin film sleeve is made up of hard sheet FRPP.
Preferably, described through hole is distributed uniformly at intervals along the circumferential and axial of described poling.
Due to the utilization of technique scheme, the present invention compared with prior art has following advantages：The present invention based on
The wideband little volume noise elimination structure structure of acoustic metamaterial is simple, eliminates the medium and low frequency in air-flow by thin film acoustic metamaterial
Noise, eliminates the high-frequency noise in air-flow by resistive material, while greatly reducing acoustic filter noise elimination volume, and has reason
The soundproof effect thought.
Brief description
Accompanying drawing 1 is the phantom of the little volume noise elimination structure of the wideband based on acoustic metamaterial of the present invention；
Accompanying drawing 2 is the left view of the little volume noise elimination structure of the wideband based on acoustic metamaterial of the present invention.
Wherein：1st, housing；2nd, poling；21st, through hole；3rd, thin film sleeve；4th, thin-film material；5th, mass；6th, fixed cover；7、
Acoustical cotton.
Specific embodiment
Come with specific embodiment below in conjunction with the accompanying drawings technical scheme is further elaborated.
Referring to the noise elimination structure of the little volume of the wideband based on acoustic metamaterial shown in Fig. 1 and Fig. 2, this noise elimination structure includes shell
Body 1, poling 2, thin film sleeve 3, thin-film material 4 and mass 5.
Housing 1 has hollow cavity, and poling 2 is located in the hollow cavity of housing 1, and the both ends of poling 2 are each passed through
Ends on the length direction of housing 1 simultaneously reaches the outside of housing 1.In the present embodiment, poling 2 is passed through with housing 1
It is welded to connect.
Thin film sleeve 3 is also fixedly installed in the hollow cavity of housing 1, and is set in the outside of poling 3.The present embodiment
In, the mode that thin film sleeve 3 is fixedly installed in housing 1 is：It is fixed with fixed cover 6 in housing 1, thin film sleeve 3 is fixing
It is connected on fixed cover 6, thus thin film sleeve 3 is fixed in housing 1 by fixed cover 6.
The inner chamber of poling 2 forms the first cavity, forms the second cavity between the inwall of the outer wall of poling 2 and thin film sleeve 3,
Poling 2 is provided with the through hole 21 of multiple connection the first cavity and the second cavity.Preferably, multiple through holes 21 are along the circumference of poling 2
Uniformly it is distributed with axially spaced-apart.
It is filled with acoustical cotton 7 in the second cavity, this acoustical cotton 7 is made up of resistive material, entrance this noise elimination knot can be eliminated
Medium-high frequency noise in the air-flow of structure, packed density in the second cavity for the acoustical cotton 7 is 80g/L, and such setting both ensured
The soundproof effect of high-frequency noise, so that have certain gap in acoustical cotton 7, will not hinder the gas entering in the second cavity
Middle and low frequency noise contact with thin-film material 4 of stream.
Thin-film material 4 is made by having resilient material, and it is fixedly installed on thin film sleeve 3, and mass 5 is fixedly installed
On thin-film material 4, and it is optimal to be arranged on the center of thin-film material 4, thin-film material 4 and mass 5 be equipped with multiple, and
The two corresponds setting, constitutes spring mass unit between thin-film material 4 and mass 5.
In the present embodiment, the mode that is fixedly installed on thin film sleeve 3 for the thin-film material 4 is：Thin film sleeve 3 is provided with
The installing hole that thin-film material 4 matches, thin-film material 4 is fixed on installation in the hole by bonding or clip.In the present embodiment, quality
Block 5 is by being adhesively fixed on thin-film material 4.
Thin-film material 4 at least has a kind of specification, the thin-film material 4 of every kind of specification be equipped with multiple, every kind of specification thin
The spring mass unit with certain frequency is constituted between membrane material 4 and mass 5.
Multiple thin-film materials 4 can be arranged on thin film sleeve 3 as follows：Thin-film material 4 edge of specification of the same race
The circumferencial direction of thin film sleeve 3 is distributed uniformly at intervals, and the thin-film material 4 of different size is along the length bearing of trend of thin film sleeve 3
It is distributed uniformly at intervals.Certainly, this multiple thin-film material 4 can also be arranged otherwise, as long as set-up mode and thin film material
The match specifications of material 4, so that the spring mass unit constituting between thin-film material 4 and mass 5 reaches the frequency of setting
?.
In this enforcement, thin-film material 4 has four kinds of specifications, and the thin-film material 4 of every kind of specification is provided with six, four kinds of specifications
The spring mass unit with 63Hz, 125Hz, 250Hz and 500Hz frequency is respectively constituted between thin-film material 4 and mass 5.
In the present embodiment, thin-film material 4 is made up of Natural rubber or silicone rubber SR, and thin film sleeve 3 is by hard sheet
FRPP makes.
The operation principle of the noise elimination structure of the present invention is：
Air-flow, after the one end of poling 2 enters this noise elimination structure, is contacted through through hole 21 with acoustical cotton 2, can by acoustical cotton 2
Eliminate the high-frequency noise in air-flow.Meanwhile, the space that the Middle and low frequency noise in air-flow passes through in acoustical cotton 2 is connect with thin-film material 4
After touch, cause the spring mass unit resonance that thin-film material 4 is constituted with mass 5, thus the medium and low frequency eliminating in air-flow is made an uproar
Sound, the air-flow after eliminating the noise flows out this noise elimination structure from the other end of poling 2.
Conventional muffler generally adopts Helmholtz acoustic filter to eliminate low-frequency noise, and the program needs enough noise elimination volumes
Low-frequency noise could be eliminated, and the noise elimination structure of the present invention is made an uproar to low frequency using the bandgap principle of thin film acoustic metamaterial
Sound is eliminated, specially：When the resonance direction of thin film and the direction of vibration of lumped mass are contrary, acoustic metamaterial is in this frequency
There is band gap in rate, have acoustically effective；This noise elimination structure eliminates high-frequency noise by resistive material such as acoustical cotton simultaneously, greatly
While reducing acoustic filter noise elimination volume, and there is preferable low frequency soundproof effect.
Above-described embodiment only technology design to illustrate the invention and feature, its object is to allow person skilled in the art's energy
Solution present disclosure much of that is simultaneously implemented according to this, can not be limited the scope of the invention with this.All spiritual according to the present invention
Equivalence changes or modification that essence is made, all should be included within the scope of the present invention.
Claims (10)
1. the little volume noise elimination structure of a kind of wideband based on acoustic metamaterial, including the housing with hollow cavity, its feature exists
In：It is relative that described noise elimination structure also includes in the hollow cavity of described housing and runs through that described housing goes up along its length
The poling at both ends, the thin film sleeve of outside being located in the hollow cavity of described housing and being set in described poling, fixation set
Put in the resilient thin-film material of tool on described thin film sleeve and the mass being fixedly installed on described thin-film material, described
The inner chamber of poling forms the first cavity, forms the second cavity, institute between the inwall of the outer wall of described poling and described thin film sleeve
State poling and be provided with multiple through holes for connecting described first cavity and described second cavity, be filled with described second cavity
The acoustical cotton being made up of resistive material, described thin-film material and described mass are equipped with multiple, and described thin-film material and institute
State mass and correspond setting, between described thin-film material and described mass, constitute spring mass unit.
2. the little volume noise elimination structure of the wideband based on acoustic metamaterial according to claim 1 it is characterised in that：Described suction
Packed density in described second cavity for the sound cotton is 80g/L.
3. the little volume noise elimination structure of the wideband based on acoustic metamaterial according to claim 1 it is characterised in that：Described thin
Membrane material at least has a kind of specification, and the described thin-film material of every kind of specification has multiple, the described thin-film material of every kind of specification
The spring mass unit with certain frequency is constituted and described mass between.
4. the little volume noise elimination structure of the wideband based on acoustic metamaterial according to claim 3 it is characterised in that：Described thin
Membrane material has four kinds of specifications, and the described thin-film material of every kind of specification is provided with six, the described thin-film material of four kinds of specifications and institute
State and between mass, respectively constitute the spring mass unit with 63Hz, 125Hz, 250Hz and 500Hz frequency.
5. the little volume noise elimination structure of the wideband based on acoustic metamaterial according to claim 3 or 4 it is characterised in that：No
The described thin-film material of same specification is spaced apart along the length bearing of trend of described thin film sleeve, the described thin film material of specification of the same race
Material is multiple circumferentially spaced along described thin film sleeve.
6. the little volume noise elimination structure of the wideband based on acoustic metamaterial according to claim 1 it is characterised in that：Described thin
Membrane material is provided with the installing hole that multiple and described thin-film material matches, and each described thin-film material is fixedly installed on an institute
State in installing hole.
7. the little volume noise elimination structure of the wideband based on acoustic metamaterial according to claim 1 it is characterised in that：Described matter
Gauge block is arranged on the center position of described thin-film material.
8. the little volume noise elimination structure of the wideband based on acoustic metamaterial according to claim 1 it is characterised in that：Described thin
Membrane material is made up of Natural rubber or silicone rubber SR.
9. the little volume noise elimination structure of the wideband based on acoustic metamaterial according to claim 1 it is characterised in that：Described thin
Membrane cover cylinder is made up of hard sheet FRPP.
10. the little volume noise elimination structure of the wideband based on acoustic metamaterial according to claim 1 it is characterised in that：Described
Through hole is distributed uniformly at intervals along the circumferential and axial of described poling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610957542.7A CN106481385B (en) | 2016-11-03 | 2016-11-03 | A kind of small volume noise elimination structure of wideband based on acoustic metamaterial |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610957542.7A CN106481385B (en) | 2016-11-03 | 2016-11-03 | A kind of small volume noise elimination structure of wideband based on acoustic metamaterial |
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| CN106481385A true CN106481385A (en) | 2017-03-08 |
| CN106481385B CN106481385B (en) | 2019-06-07 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374805A (en) * | 2018-01-24 | 2018-08-07 | 国网山西省电力公司电力科学研究院 | The ventilated type acoustic metamaterial sound insulation bucket of for transformer reducing fan noise |
| CN109334776A (en) * | 2018-11-16 | 2019-02-15 | 清华大学苏州汽车研究院（相城） | A kind of automobile dash board based on acoustic metamaterial |
| CN109493841A (en) * | 2018-12-07 | 2019-03-19 | 哈尔滨工程大学 | Frequency Adjustable formula acoustic metamaterial duct attenuation device |
| CN110428801A (en) * | 2019-07-10 | 2019-11-08 | 北京石油化工学院 | Silencing apparatus for explosion equipment |
| CN110477951A (en) * | 2019-08-30 | 2019-11-22 | 浙江大学 | Ultrafast composite plane wave imaging method based on broadband acoustic metamaterial |
| CN111102423A (en) * | 2019-12-16 | 2020-05-05 | 江苏科技大学 | Compound type silencing barrel based on photonic crystal pipeline |
| CN112867860A (en) * | 2018-08-03 | 2021-05-28 | 波士顿大学基金会 | Air transmission selective silencer using super-open metamaterial |
| CN114678000A (en) * | 2022-02-28 | 2022-06-28 | 开化县钱江源高端装备研究院 | Thin film type acoustic metamaterial structure |
| CN115234524A (en) * | 2022-07-03 | 2022-10-25 | 中国船舶重工集团公司第七0三研究所 | Detachable low-noise steam jet compressor |
| US11828253B2 (en) | 2020-08-14 | 2023-11-28 | Mann+Hummel Gmbh | Air duct of an internal combustion engine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PT1378656E (en) * | 2002-07-05 | 2008-02-19 | Wecosta | Porous pipe with a thin film layer |
| CN105090670A (en) * | 2015-09-15 | 2015-11-25 | 西安交通大学 | Thin film acoustic metamaterial silencer and designing method thereof |
| CN105118496A (en) * | 2015-09-11 | 2015-12-02 | 黄礼范 | Acoustic meta-material basic structure unit, composite structure thereof, and assembly method |
| CN206221030U (en) * | 2016-11-03 | 2017-06-06 | 清华大学苏州汽车研究院（相城） | A kind of small volume noise elimination structure of wideband based on acoustic metamaterial |
-
2016
- 2016-11-03 CN CN201610957542.7A patent/CN106481385B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PT1378656E (en) * | 2002-07-05 | 2008-02-19 | Wecosta | Porous pipe with a thin film layer |
| CN105118496A (en) * | 2015-09-11 | 2015-12-02 | 黄礼范 | Acoustic meta-material basic structure unit, composite structure thereof, and assembly method |
| CN105090670A (en) * | 2015-09-15 | 2015-11-25 | 西安交通大学 | Thin film acoustic metamaterial silencer and designing method thereof |
| CN206221030U (en) * | 2016-11-03 | 2017-06-06 | 清华大学苏州汽车研究院（相城） | A kind of small volume noise elimination structure of wideband based on acoustic metamaterial |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374805A (en) * | 2018-01-24 | 2018-08-07 | 国网山西省电力公司电力科学研究院 | The ventilated type acoustic metamaterial sound insulation bucket of for transformer reducing fan noise |
| CN112867860A (en) * | 2018-08-03 | 2021-05-28 | 波士顿大学基金会 | Air transmission selective silencer using super-open metamaterial |
| US11846217B2 (en) | 2018-08-03 | 2023-12-19 | Trustees Of Boston University | Air-transparent selective sound silencer using ultra-open metamaterial |
| CN109334776A (en) * | 2018-11-16 | 2019-02-15 | 清华大学苏州汽车研究院（相城） | A kind of automobile dash board based on acoustic metamaterial |
| CN109493841A (en) * | 2018-12-07 | 2019-03-19 | 哈尔滨工程大学 | Frequency Adjustable formula acoustic metamaterial duct attenuation device |
| CN110428801A (en) * | 2019-07-10 | 2019-11-08 | 北京石油化工学院 | Silencing apparatus for explosion equipment |
| CN110428801B (en) * | 2019-07-10 | 2024-06-04 | 北京石油化工学院 | Muffler device for explosive device |
| CN110477951A (en) * | 2019-08-30 | 2019-11-22 | 浙江大学 | Ultrafast composite plane wave imaging method based on broadband acoustic metamaterial |
| US20210064993A1 (en) * | 2019-08-30 | 2021-03-04 | Zhejiang University | Method For Ultrafast Compound Plane Wave Imaging Based On Broadband Acoustic Metamaterial |
| US11829872B2 (en) * | 2019-08-30 | 2023-11-28 | Zhejiang University | Method for ultrafast compound plane wave imaging based on broadband acoustic metamaterial |
| CN110477951B (en) * | 2019-08-30 | 2020-08-25 | 浙江大学 | Ultra-fast composite plane wave imaging method based on broadband acoustic metamaterial |
| CN111102423A (en) * | 2019-12-16 | 2020-05-05 | 江苏科技大学 | Compound type silencing barrel based on photonic crystal pipeline |
| US11828253B2 (en) | 2020-08-14 | 2023-11-28 | Mann+Hummel Gmbh | Air duct of an internal combustion engine |
| CN114678000A (en) * | 2022-02-28 | 2022-06-28 | 开化县钱江源高端装备研究院 | Thin film type acoustic metamaterial structure |
| CN114678000B (en) * | 2022-02-28 | 2022-12-13 | 开化县钱江源高端装备研究院 | Thin film type acoustic metamaterial structure |
| CN115234524A (en) * | 2022-07-03 | 2022-10-25 | 中国船舶重工集团公司第七0三研究所 | Detachable low-noise steam jet compressor |
| CN115234524B (en) * | 2022-07-03 | 2024-05-17 | 中国船舶重工集团公司第七0三研究所 | Detachable low-noise steam jet compressor |
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