CN106963554B - Graphene film hearing protectors - Google Patents
Graphene film hearing protectors Download PDFInfo
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- CN106963554B CN106963554B CN201710272294.7A CN201710272294A CN106963554B CN 106963554 B CN106963554 B CN 106963554B CN 201710272294 A CN201710272294 A CN 201710272294A CN 106963554 B CN106963554 B CN 106963554B
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- graphene film
- hearing
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
- A61F11/06—Protective devices for the ears
- A61F11/14—Protective devices for the ears external, e.g. earcaps or earmuffs
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2204/00—Structure or properties of graphene
- C01B2204/02—Single layer graphene
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2204/00—Structure or properties of graphene
- C01B2204/04—Specific amount of layers or specific thickness
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Acoustics & Sound (AREA)
- Biophysics (AREA)
- Otolaryngology (AREA)
- Psychology (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Graphene film hearing protectors, it is related to a kind of hearing protectors.The present invention is in order to which the mode for solving the existing earmuff protection hearing for attracting foam is almost all sound of decaying, and which results in the communication disorders of sense of hearing isolation and people, and exist and carry and wear the problem of typical earmuffs protection hearing is inconvenient.The present invention includes frame body (1) and two covers (2), two covers (2) are oppositely arranged, and it is connected between two covers (2) by frame body (1), each cover (2) includes hanging bracket (2-1) and graphene film (2-2), hanging bracket (2-1) is bowl-shape grid framework, and graphene film (2-2) is attached on hanging bracket (2-1).The present invention is used for hearing protection.
Description
Technical field
The present invention relates to a kind of hearing protectors, and in particular to a kind of graphene film hearing protectors.
Background technique
The harm of noise and explosion wave is increasingly prominent in modern society.The diseases such as typical occupational noise deafness
Precisely due to the sensorineural deafness of slow progressive occurs by influence of noise for a long time for the sense of hearing.Country, the People's Republic of China (PRC)
Health and Family Planning Committee have issued People's Republic of China's Occupational in 2014 (Guo Weitong (2014) 14) and have defended
Raw standard GBZ 49-2014 " diagnosis of occupational noise deaf ".
Noise threatens health of people, and noise can damage the auditory system of worker and soldier and lead to a variety of nervous system diseases
Disease and sequelae.Various explosions will lead to the acoustic pressure acute variation in air, make the auditory system of people that can not adapt to and can't bear weight
It is negative.These hazardous noises can be roughly divided into two classes, i.e. high-decibel sound and explosion wave.Why these two types of noise energy losses
The hearing hurted sb.'s feelings is that because of this, they all propagate excessive acoustic pressure load in air, but the two substantially has differences.
Shock wave is bulk gas molecule supersonic motion caused by high energy explodes, this makes these gas molecules with very
Big kinetic energy.The air pressure that shock wave will lead to moment increases, although duration is very short, shock wave, which can still puncture eardrum, to be caused
Anaudia.Shock wave can obviously decay with the increasing of propagation distance, but around blow-up point a certain range of people according to
It so will receive seriously threatening for blast injury hearing.The spread speed of high-decibel sound is still velocity of sound, but relative to normal
The sound for, high-decibel sound will cause more air molecule displacements in air, also result in acoustic pressure it is excessive to
It crushes eardrum and causes hearing impairment.In order to capture faint acoustic information, the eardrum thickness in the auditory system of the mankind about only has
0.1 millimeter.This makes eardrum be easy to rupture under biggish acoustic pressure load.
In conclusion the characteristics of shock wave is supersonic air molecular impingement, the characteristics of high-decibel sound is higher frequency
Air molecule impact.The mode of the existing earmuff protection hearing for attracting foam is almost all sound of decaying, but
It is the communication disorder which results in sense of hearing isolation and people, and there is carrying and wear typical earmuffs and protect hearing not convenient
Problem.
Summary of the invention
The purpose of the present invention is to solve the modes of the existing earmuff protection hearing for attracting foam almost to decline
Subtract all sound, which results in the communication disorders of sense of hearing isolation and people, and exist to carry and wear typical earmuffs and protect and listen
The problem of power is inconvenient.And then provide a kind of graphene film hearing protectors.
The technical scheme is that graphene film hearing protectors includes frame body and two covers, two cover phases
It is connected to setting, and between two covers by frame body, each cover includes hanging bracket and graphene film, hanging bracket
For bowl-shape grid framework, graphene film is attached in hanging bracket.
Further, graphene film 2-2 with a thickness of 0.1-4.0nm.
Further, the mesh form of bowl-shape grid framework is triangle, quadrangle, circle, hexagon or octagon.
Further, the mesh maximum length 0.001mm-10mm of bowl-shape grid framework.
Further, graphene film is graphene film.
The present invention has the effect that compared with prior art
One, graphene film hearing protectors of the invention will not filter and decay normal acoustic information, avoid suction
Sense of hearing failure and communication disorder caused by the typical earmuffs and earplug of the manufacture of sound material.The graphene of hanging bracket of the invention is thin
Film can produce the noise for inhibiting to propagate in air and absorb shock wave, and not influence the intelligent hearing of the transmission of normal sound
Protector.The problem of effective communication disorder for avoiding sense of hearing isolation and people；In addition, the present invention is in actual use, it incite somebody to action this
Invention is directly worn on the head, and is avoided existing earmuff and is carried and wear inconvenient problem.
Two, the present invention is realized in " will not filter and normal acoustic information of decaying ":
1, the elasticity modulus and tensile strength performance of graphene is effectively utilized in the present invention, realizes declining for high-decibel sound
Subtract.
Graphene of the invention uses chemical vapor deposition method and manufactures several square millimeters to several square centimeters sizes
Graphene film or graphene monocrystal thin films.It is a large amount of empty when the graphene film in high-decibel sound impact hanging bracket
Gas molecular impingement will lead to graphene film by quick inflation, that is, cause to stretch in graphene film face.The high drawing of graphene
Drawn expanded in the face of graphene can effectively be inhibited by stretching modulus.This can effectively inhibit the increase of amplitude outside the face of graphite film,
Graphene is propagated through to inhibit excessively high acoustic pressure.(refer to stone with different sides outer lug degree by designing and manufacturing
Outer lug degree of the black alkene film in bowl-shape grid framework) suspension strut graphene film.We can be selectively
The sound decayed more than certain decibel (referring specifically to 60 decibels).
2, the in-plane strength and toughness properties of graphene is effectively utilized in the present invention, realizes the ability of carrying acoustic pressure.
The present invention takes full advantage of outside the face of graphene film flexible nature to absorb the shock wave in air.Graphite simultaneously
Alkene has high in-plane strength and toughness, this assigns the ability that graphene film carries higher acoustic pressure.
3, the present invention improves the bearing strength of graphene by hanging bracket.
The present invention improves graphene bearing strength by mesh-supported frame.The present invention is by improving graphene film
Slackness increases intensity of the graphene under acoustic pressure load.Bigger slackness will lead to graphene film under acoustic pressure load and exist
Degree of convexity on grid framework is different, and bigger degree of convexity will increase Oscillation Amplitude of the graphene film under acoustic pressure load
And intensity.It is proposed of the invention manufactures the bowl structure of grid framework with graphene film to manufacture hearing protectors.Pass through
The slackness for adjusting the mesh size of grid framework, shape and graphene film, which can produce the different intelligence of performance, listens and tries hard to keep
Protect device.
Expansion stretches the inhibition to big decibel noise and attenuation in the graphene film face of hanging bracket.Needle of the present invention
It generates surface shock wave to high-speed air molecular impingement graphene surface to study, so that grasping graphene film absorbs air
In shock wave ability and rule.Hot ring is confirmed by graphene surface ripple under electron microscope observation to room temperature environment
Border will lead to the ripple consecutive variations of graphene surface, it is shown that the face outside direction of graphene is very soft.The stone of hanging bracket
Black alkene film is in fact surface soft outside tough in a face and face.When sound wave encounters the graphene film of suspension strut,
Even if faint acoustic pressure fluctuation can all lead to the graphene film forced vibration.The graphene film of forced vibration will become sound
Source, the sound wave generated can be propagated to the back side direction of the film.So that realization is not filtered and normal acoustic information of decaying.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；Fig. 2 is the main view of cover 2；Fig. 3 is that the mesh form of cover 2 is
Structural schematic diagram when triangle；Fig. 4 be cover 2 mesh form be hexagon when structural schematic diagram；Fig. 5 is cover 2
Structural schematic diagram when mesh form is square；Fig. 6 is that state of the small graphene film of slackness when by acoustic pressure is shown
It is intended to；Fig. 7 is status diagram of the big graphene film of slackness when by acoustic pressure.
Specific embodiment
Specific embodiment 1: illustrating that present embodiment, present embodiment include frame body 1 and two covers in conjunction with Fig. 1 to Fig. 7
Body 2, two covers 2 are oppositely arranged, and are connected between two covers 2 by frame body 1, and each cover 2 includes hanging bracket 2-1
With graphene film 2-2, hanging bracket 2-1 is bowl-shape grid framework, and graphene film 2-2 is attached on hanging bracket 2-1.
Specific embodiment 2: embodiment is described with reference to Fig. 2, the thickness of the graphene film 2-2 of present embodiment
For 3-4nm.So set, convenient for the graphene film for being transmitted through softness that sound is lossless.Other compositions and connection relationship and tool
Body embodiment one is identical.
Specific embodiment 3: embodiment is described with reference to Fig. 2, the graphene number of plies that present embodiment is covered is 1-
12 layers, thickness limit is in 0.1-4nm.So set, single-layer graphene is compared more than other thin-film materials, the thickness of 3.4nm
Degree is the minimum of material thickness, this causes the bending stiffness out of plane of the material very low.In addition, the unit area of graphene
Density of material it is very low, if sound wave almost can be lossless if fruit acoustic pressure is not enough to cause graphene film expansion to stretch
It is transmitted through soft graphene film.Other compositions and connection relationship are the same as one or two specific embodiments.
Specific embodiment 4: illustrating present embodiment, the net of the bowl-shape grid framework of present embodiment in conjunction with Fig. 3 to Fig. 5
Hole shape is triangle, quadrangle, circle, hexagon or octagon.So set, different mesh forms will lead to graphene
Film amplitude under noise load is different, and graphene film hearing protectors is adjusted by selecting different mesh forms to making an uproar
The rejection ability of sound.Other compositions and connection relationship are identical as specific embodiment one, two or three.
Specific embodiment 5: illustrate present embodiment in conjunction with Fig. 3 to Fig. 5, the bowl-shape grid framework of present embodiment
Mesh maximum length 0.001mm-10mm.So set, by adjusting the adjustable acoustic pressure of mesh span of bowl-shape grid framework
The elongation strain of caused graphene film, to adjust graphene film to the suppression level of noise.Other compositions and connection
Relationship and specific embodiment one, two, three or four are identical.
Specific embodiment 6: embodiment is described with reference to Fig. 1, the frame body 1 of present embodiment is arc elastic frame.Such as
This setting uses convenient for the people of different head diameters, and also to effectively prevent long periods of wear human body head uncomfortable for the frame body of elasticity
The phenomenon that.Other compositions and connection relationship and specific embodiment one, two, three, four or five are identical.
Ear-shield type and ear type hearing protectors are generally filled with quieter material to protect wearer to avoid the injury of noise.Ear
The shell of cover mostly uses thermoplastic material to manufacture, and noise reduction sponge absorbs sound wave by increasing air drag, thus sound wave of decaying
Amplitude.Acoustic energy is converted into thermal energy and discharges.The difference of ear-shield type and ear type hearing protectors is them to not
The noise attentuation ability of same frequency is different.Generally speaking, protection of the style hearing protector to 500Hz low frequency noise below
The effect is relatively poor.When noise energy concentrates on low frequency range, ear type hearing protectors may be more effective.Regrettably traditional
Ear-shield type and the mode of earplug protection hearing almost decay all sound, but which results in the friendships of sense of hearing isolation and people
Flow obstacle.
Illustrate in conjunction with Fig. 6 and Fig. 7, discloses the ability for the shock wave that graphene film absorbs in air, the energy of shock wave
Amount can not be fully absorbed by graphene film, and part shock wave energy will be converted into sound wave and propagate through graphene, be passed through
Calculate the intensity of sound that can obtain being converted into sound wave after shock wave is absorbed by graphene.What the air molecule in shock wave moved
For speed much larger than the velocity of sound in air, this makes air molecule carry a large amount of kinetic energy when hitting graphene surface.Pass through Molecule Motion
The a large amount of atom high speed impacts of mechanical simulation, can in the generated exhibiting high surface wave (including shear wave and longitudinal wave) of graphene film
Prediction is the accounting that shock wave kinetic energy is converted into surface wave energy.
The slackness of the graphene film of hanging bracket is as an important parameter, to graphene film proposed by the present invention
The performance of hearing protectors has a significant impact.Because the big graphene film of slackness needs bigger acoustic pressure load that can just cause
The expansion of the graphene film stretches.The present invention is by measuring the obtained intensity of acoustic wave of molecular dynamics simulation come comprehensive descision not
With the validity of the graphene film protection hearing of hanging bracket.
Specific embodiment 7: the graphene slackness of embodiment is described with reference to Fig.7, present embodiment will lead to stone
The angular range of the span for the spherical surface that tympanites of the black alkene film under acoustic pressure is formed is A, A=1 degree -180 degree.So set, logical
Overregulate the angular range of the span for the spherical surface that tympanites of the graphene film under acoustic pressure is formed, adjustable graphene film pair
The suppression level of noise.Other compositions and connection relationship and specific embodiment one, two, three, four, five or six are identical.
Claims (4)
1. a kind of graphene film hearing protectors, it includes frame body (1) and two covers (2), and two covers (2) are opposite to be set
It sets, and is connected between two covers (2) by frame body (1), it is characterised in that: each cover (2) includes hanging bracket (2-1)
With graphene film (2-2), graphene film manufactures several square millimeters using chemical vapor deposition method by graphene and puts down to number
Square centimetre of film, hanging bracket (2-1) are bowl-shape grid framework, and graphene film (2-2) is attached to hanging bracket (2-1)
On.
2. graphene film hearing protectors according to claim 1, it is characterised in that: the thickness of graphene film (2-2)
Degree is 0.1nm-4.0nm.
3. graphene film hearing protectors according to claim 2, it is characterised in that: the mesh shape of bowl-shape grid framework
Shape is triangle, quadrangle, circle, hexagon or octagon.
4. graphene film hearing protectors according to claim 3, it is characterised in that: the mesh of bowl-shape grid framework is most
Long length 0.001mm-10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710272294.7A CN106963554B (en) | 2017-04-24 | 2017-04-24 | Graphene film hearing protectors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710272294.7A CN106963554B (en) | 2017-04-24 | 2017-04-24 | Graphene film hearing protectors |
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| Publication Number | Publication Date |
|---|---|
| CN106963554A CN106963554A (en) | 2017-07-21 |
| CN106963554B true CN106963554B (en) | 2019-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710272294.7A Active CN106963554B (en) | 2017-04-24 | 2017-04-24 | Graphene film hearing protectors |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108924690A (en) * | 2018-07-19 | 2018-11-30 | 苏州七巧板日用品科技有限公司 | A kind of convenient earplug |
| CN113208813A (en) * | 2021-03-30 | 2021-08-06 | 电子科技大学 | Noise reduction earplug |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0127275A1 (en) * | 1983-03-28 | 1984-12-05 | Racal Safety Limited | Hearing protector |
| JP5019525B2 (en) * | 2007-07-09 | 2012-09-05 | 株式会社オーディオテクニカ | Hearing protector |
| CN104168523A (en) * | 2014-08-04 | 2014-11-26 | 薛峰 | Noise-reduction earphone based on graphene foam |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE530529C2 (en) * | 2005-05-27 | 2008-07-01 | Peltor Ab | Ear protection |
| WO2008070662A2 (en) * | 2006-12-04 | 2008-06-12 | Adaptive Technologies, Inc. | Sound-attenuating earmuff having isolated double-shell structure |
-
2017
- 2017-04-24 CN CN201710272294.7A patent/CN106963554B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0127275A1 (en) * | 1983-03-28 | 1984-12-05 | Racal Safety Limited | Hearing protector |
| JP5019525B2 (en) * | 2007-07-09 | 2012-09-05 | 株式会社オーディオテクニカ | Hearing protector |
| CN104168523A (en) * | 2014-08-04 | 2014-11-26 | 薛峰 | Noise-reduction earphone based on graphene foam |
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| Publication number | Publication date |
|---|---|
| CN106963554A (en) | 2017-07-21 |
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Effective date of registration: 20181127 Address after: 150001 No. 92 West straight street, Nangang District, Heilongjiang, Harbin Applicant after: Harbin Institute of Technology Address before: Room 203, Unit 2, No. 11, Jiaotong Street, Nangang District, Harbin City, Heilongjiang Province, 150001 Applicant before: Yang Lin |
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