CN110351625B - Physical noise reduction device and method based on air escape valve and application - Google Patents
Physical noise reduction device and method based on air escape valve and application Download PDFInfo
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- CN110351625B CN110351625B CN201910628118.1A CN201910628118A CN110351625B CN 110351625 B CN110351625 B CN 110351625B CN 201910628118 A CN201910628118 A CN 201910628118A CN 110351625 B CN110351625 B CN 110351625B
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- air escape
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1058—Manufacture or assembly
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1083—Reduction of ambient noise
Abstract
The invention discloses a physical noise reduction device based on a release valve, a method and an application in the technical field of audio noise reduction, wherein the physical noise reduction of noise is carried out by reducing the magnitude of air pressure flow entering human ears; the device is applied to earphones. In the environment with high noise and high air pressure, the air release valve is arranged at the front end of the noise to effectively attenuate the noise, then the effective volume of the rear cavity is changed to reversely offset the sound, and then the earplug (or earmuff) is matched for physical noise reduction to form an integral noise reduction system, so that the high-noise and high air pressure resistance of the noise reduction device and the earphone is improved, and the hearing of the human ear can be effectively protected.
Description
Technical Field
The invention relates to the technical field of audio noise reduction, in particular to a physical noise reduction device based on an air escape valve, a method and application.
Background
Along with the development of science and technology, people's standard of living constantly improves, also can produce more noise thereupon, and in order to guarantee good life, operational environment, need reduce the noise that gets into the people's ear, consequently fall the earphone of making an uproar and come into production by oneself, wherein fall the earphone most commonly with the physics.
The physical noise reduction earphone is based on a physical isolation principle, and uses a simple physical method to create a closed space by carrying out appearance design or closely attaching the earphone to the auditory canal in an in-ear manner, and blocks extra sound outside the earphone so as to achieve the effect of noise reduction. For example, in the process of realizing the physical noise reduction effect of the in-ear earphone, rubber in a special shape is adopted to be tightly attached to the ear canal to play a role in sound isolation; in the process of realizing the physical noise reduction effect of the headset, sound is primarily isolated through the earmuffs, high-density sound-absorbing cotton or silica gel is filled into the earmuffs, and the requirement of people on wearing comfort is met by wrapping the edges with a protein leather material. The methods are all that the external noise is blocked outside the earphone, so that the aim of protecting the hearing of human ears is fulfilled.
However, the existing physical noise reduction earphone can only achieve a certain noise reduction effect when the noise environment is lower than 105 db (civil market), and when the existing physical noise reduction earphone is used in environments with high noise and high air pressure of up to 130 db, such as driving beside an airplane and taking off and landing by airborne personnel, the current physical noise reduction mode is not under the control. Because the energy of the noise rises exponentially when the noise is 10 dB higher, the 140 dB noise can directly crack the eardrum impact bleeding of a person without protection, and permanent hearing loss is caused.
The above-mentioned drawbacks are worth solving.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a physical noise reduction device based on an air escape valve, a method and application.
The technical scheme of the invention is as follows:
a physical noise reduction device based on an air escape valve comprises a device body, the device body is sleeved in the ear canal of a human ear or is coated outside the human ear, and is characterized in that,
an inner cavity and an outer cavity are arranged in the device body, the inner cavity is communicated with the auditory canal, the outer cavity is a channel with a tightening port, one end of the outer cavity is communicated with the inner cavity, and the other end of the outer cavity is communicated with the outside through an air inlet on the device body;
the outer cavity is sleeved with an air escape valve, a plurality of air escape holes are formed in the air escape valve, the outer diameter of the air escape valve is larger than the inner diameter of the tightening opening, and the air pressure difference on the two sides of the air escape valve drives the air escape valve to slide between the tightening opening and the air inlet hole.
The invention according to the above aspect is characterized in that the tightening port is located in the middle of the outer chamber.
The invention according to the scheme is characterized in that a filter screen is arranged at the air inlet.
The invention according to the above scheme is characterized in that the air release valve is a sphere with a smooth surface.
The invention according to the above scheme is characterized in that 4 air release holes are arranged on the air release valve.
On the other hand, the physical noise reduction method based on the air release valve is characterized in that a channel for noise reduction is arranged on a physical noise reduction device body worn by a human ear, and the physical noise reduction of noise is carried out by reducing the size of air pressure flow entering the human ear.
The noise reduction device is characterized in that a noise reduction air release valve is arranged in the channel, an air release hole is formed in the air release valve, when the device body is located in a noise environment, the air release valve is tightly attached to the inner wall of the channel, and external boosting airflow enters human ears after being reduced in pressure through the air release hole.
The invention according to the above scheme is characterized in that the size of the air flow entering the human ear is reduced, and meanwhile, the effective volume of the cavity communicated with the human ear is reduced, so that the sound pressure output by the device body is reduced.
Further, set up the snuffle valve of usefulness of making an uproar falls in the passageway, through control the snuffle valve is in the position in the passageway reduces the intercommunication people's ear the effective volume of cavity.
The earphone applying the physical noise reduction device based on the air release valve is characterized in that the physical noise reduction device based on the air release valve is arranged in the earphone.
The invention according to the above aspect is characterized in that the earphone to which the physical noise reduction device based on the air release valve is applied is an in-ear earphone or a headphone.
According to the scheme, the noise reduction earphone has the advantages that in a high-noise and high-air-pressure environment, the air release valve device at the front end of the noise releases air for pressure release, so that part of noise energy is released in advance, in addition, the effective cavity volume of the earphone is changed by the movement of the air release valve, the sound frequency response curve is further changed, the frequency response sound pressure curve of the noise in the earphone cavity is reduced, the high-noise and high-air-pressure resistance capability is improved, the hearing of a human ear can be effectively protected, the whole structure device is simple, a good noise reduction effect can be realized without a complex peripheral structure, and the corresponding cost and the finished product weight of the noise reduction earphone are reduced.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the figure, 1, lumen; 21. a first outer chamber; 22. a second outer chamber; 3. an air inlet; 4. a gas release valve; 5. an air release hole; 6. and (5) tightening the opening.
Detailed Description
The invention is further described with reference to the following figures and embodiments:
as shown in figure 1, the physical noise reduction device based on the air release valve comprises a device body, wherein the device body is sleeved in an ear canal of a human ear or is coated outside the human ear, and the noise reduction of sound entering the human ear is realized.
The device body is internally provided with an inner cavity 1 and an outer cavity, the inner cavity 1 is communicated with an auditory canal, the outer cavity is a channel with a tightening port 6, one end of the outer cavity is communicated with the inner cavity 1, and the other end of the outer cavity is communicated with the outside through an air inlet 3 on the device body. In this embodiment, the tightening opening 6 is located in the middle of the outer cavity, and the specific setting position of the tightening opening 6 can be adjusted according to different use environments. The volume of the outer chamber inside the tightening mouth 6 (i.e., the first outer chamber 21) is smaller than the volume of the outer chamber outside the tightening mouth 6 (i.e., the second outer chamber 22), and the ratio of the volume of the first outer chamber 21 to the volume of the second outer chamber 22 is preferably 1:1.25, so that the change in the channel air pressure of the outer chambers is more adaptive to the air pressure level caused by the noise received by the human body.
The outer cavity is internally sleeved with an air escape valve 4, a plurality of air escape holes 5 are formed in the air escape valve 4, the outer diameter of the air escape valve 4 is larger than the inner diameter of the tightening opening 6, and the air pressure difference of the two sides of the air escape valve 4 drives the air escape valve 4 to slide between the tightening opening 6 and the air inlet 3. After the number of the air release holes 5 is modeled according to the cavity acoustics, the number of the air release holes 5 is obtained through simulation calculation, and the number of the air release holes 5 is increased along with the increase of the air pressure difference inside and outside the tightening port 6. In this embodiment, the air release valve 4 is provided with 4 air release holes 5, so that the corresponding sound system of the whole noise reduction device is matched with the pressure difference balance time, and the noise reduction processing effect is better.
Preferably, the air release valve 4 is a sphere with a smooth surface, so that the air release valve 4 can slide in the outer cavity, and the air release valve can timely perform corresponding operation when noise is generated.
Preferably, the air inlet 5 is provided with a filter screen which can filter impurities in the use environment. Preferably, this filter screen can be dismantled with the device body and be connected, is convenient for change the filter screen, guarantees the life of whole earphone.
A physical noise reduction method based on an air escape valve is characterized in that a channel for noise reduction is arranged on a physical noise reduction device body worn by human ears, and the physical noise reduction of noise is carried out by reducing the size of air pressure flow entering the human ears. Specifically, the method comprises the following steps: set up the disappointing valve of the usefulness of making an uproar of falling in the passageway, set up the disappointing hole on the disappointing valve, when the device body was located the noise environment, the inner wall of passageway was hugged closely to the disappointing valve, and the outside air current that steps up gets into people's ear through disappointing the hole.
The invention reduces the pressure flow entering human ear to reduce the noise, which comprises the following steps:
it is well known that high noise environments are often accompanied by strong air pressure. The air release valve is positioned at the position of the air inlet under the action of gravity in an original state, and when strong external pressure (such as airplane landing) acts, a strong air pressure difference is formed in the inner space and the outer space of the air release valve. The strong atmospheric pressure stream advances the inlet port and promotes the snuffle valve to inside motion to the narrowest department of passageway (tighten up mouthful department promptly), and the snuffle valve divide into first exocoel and second exocoel (the second exocoel communicates the outside) with the exocoel this moment, and the strong atmospheric pressure stream can only the subtotal first exocoel of entering through the hole of disappointing and inner chamber, and then can effectively obtain the buffering and weaken to the effect that the strong atmospheric pressure stream flows to this weakens the strong pressure effect that strong atmospheric pressure stream brought for human eardrum. When the pressure difference between the first outer cavity and the second outer cavity is reduced, the air escape valve falls back to the position of the air inlet hole.
Preferably, when the size of the air current that gets into the people's ear is reduced, the effective volume of the cavity of intercommunication people's ear for the acoustic pressure of device body output descends, and then further carries out noise reduction to the noise. Specifically, the method comprises the following steps: the air release valve for noise reduction is arranged in the channel, and the effective volume of the cavity communicated with the human ear is reduced by controlling the position of the air release valve in the channel.
The invention reduces the effective volume of the cavity communicated with human ears to realize the physical noise reduction of noise according to the following principle:
when the air release valve is arranged at the tightening opening, the effective volume of the device body communicated with the human ear is reduced (namely the sum of the first outer cavity and the inner cavity), the rear cavity of the device body (namely the sum of the first outer cavity and the inner cavity) is reduced, the frequency response curve of the device body is changed, when strong noise and strong air pressure act on the rear cavity, the pressure resistance represented by the smaller volume (namely the volume of the first outer cavity) is stronger, and a part of noise energy can be effectively reflected back; meanwhile, in a high-noise environment, when the rear cavity of the device body becomes small, the low-frequency part of the frequency response curve of sound is raised and high-frequency sinks, the sound pressure level and the output volume output by the device body are reduced, the setting of a noise reduction curve is more favorably met, the noise reduction effect is deeper and more obvious, the sound heard by human ears is reduced, and the hearing of people is more favorably protected.
The number of the openings of the air release valve directly determines the time required for balancing the pressure difference between the inside and the outside of the air release valve, namely the response time of the system. When strong noise and strong air pressure enter the air inlet hole and then act on the outer cavity, due to the difference between the strong air pressures of the inner cavity and the outer cavity, according to a pressure and pressure calculation formula F = p × s (F is pressure, p is pressure and s is a stress area), when the pressure is constant, the area of the stress cavity is rapidly reduced to weaken the action of the pressure difference, the pressure difference can enable the air release valve to rapidly move towards the tightening opening, and at the moment, the moving speed of the air release valve can be directly influenced by the number of the openings.
In this embodiment, when the number of the air release holes on the air release valve is 4, the system response time is just matched with the pressure difference balance time so as to ensure the optimal system response time and further protect human ears from being affected by a strong noise environment in time.
The device body can be arranged in the earphone, and noise reduction of sound is realized by wearing the earphone. The earphone can be an in-ear earphone or a head-mounted earphone, and can also be equipment worn by other people.
When the earphone with the device body is positioned in a strong noise and strong air pressure environment, the air release valve firstly effectively attenuates noise, then the effective volume of the back cavity is changed to reversely offset the sound, and then the earplug (or earmuff) is matched for physical noise reduction to form an integral noise reduction system, so that the noise reduction effect of 20 decibels can be achieved on the noise, the hearing of operators in the high noise environment is greatly improved, the absolutely safe and effective hearing protection is provided for the operators in the high noise environment (such as ground personnel, air flight personnel and the like), and the aging time of eardrums is directly prolonged.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
The invention is described above with reference to the accompanying drawings, which are illustrative, and it is obvious that the implementation of the invention is not limited in the above manner, and it is within the scope of the invention to adopt various modifications of the inventive method concept and technical solution, or to apply the inventive concept and technical solution to other fields without modification.
Claims (10)
1. A physical noise reduction device based on an air escape valve comprises a device body, the device body is sleeved in the ear canal of a human ear or is coated outside the human ear, and is characterized in that,
an inner cavity and an outer cavity are arranged in the device body, the inner cavity is communicated with the auditory canal, the outer cavity is a channel with a tightening port, one end of the outer cavity is communicated with the inner cavity, and the other end of the outer cavity is communicated with the outside through an air inlet on the device body;
the outer cavity is sleeved with an air escape valve, a plurality of air escape holes are formed in the air escape valve, the outer diameter of the air escape valve is larger than the inner diameter of the tightening opening, and the air pressure difference on the two sides of the air escape valve drives the air escape valve to slide between the tightening opening and the air inlet hole.
2. The physical noise reduction device based on a deflation valve as in claim 1, wherein the cinch port is located in the middle of the outer chamber.
3. The physical noise reducer based on air escape valve of claim 1 wherein a filter screen is placed at the air inlet.
4. The physical noise reducer based on air escape valve according to claim 1, characterized in that there are 4 air escape holes on the air escape valve.
5. A physical noise reduction method based on a release valve, characterized in that a channel for noise reduction is arranged on the device body of the physical noise reduction device based on the release valve, which is worn by human ears and is based on any one of claims 1 to 4, and the physical noise reduction of noise is carried out by reducing the magnitude of air pressure flow entering human ears.
6. The physical noise reduction method based on the air escape valve according to claim 5, characterized in that the air escape valve for noise reduction is arranged in the channel, the air escape valve is provided with an air escape hole, when the device body is located in a noise environment, the air escape valve is tightly attached to the inner wall of the channel, and the external boosted airflow enters human ears after being depressurized through the air escape hole.
7. The physical noise reduction method based on the air escape valve as claimed in claim 5, characterized in that the effective volume of the cavity communicated with the human ear is reduced while the size of the air flow entering the human ear is reduced, so that the sound pressure output by the device body is reduced.
8. The physical noise reduction method based on air release valves of claim 7, wherein air release valves for noise reduction are arranged in the channels, and the effective volume of the cavity communicated with human ears is reduced by controlling the positions of the air release valves in the channels.
9. An earphone employing a physical noise reduction means based on a relief valve, wherein the physical noise reduction means based on a relief valve as claimed in any one of claims 1 to 4 is provided in the earphone.
10. The physical noise reduction device in accordance with claim 9, wherein the physical noise reduction device in accordance with the air release valve is an in-ear headphone or a headset.
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| CN201910628118.1A CN110351625B (en) | 2019-07-12 | 2019-07-12 | Physical noise reduction device and method based on air escape valve and application |
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| CN201910628118.1A CN110351625B (en) | 2019-07-12 | 2019-07-12 | Physical noise reduction device and method based on air escape valve and application |
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| CN110351625A CN110351625A (en) | 2019-10-18 |
| CN110351625B true CN110351625B (en) | 2020-10-30 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113099335A (en) * | 2020-01-08 | 2021-07-09 | 北京小米移动软件有限公司 | Method and device for adjusting audio parameters of earphone, electronic equipment and earphone |
| CN113099336B (en) * | 2020-01-08 | 2023-07-25 | 北京小米移动软件有限公司 | Method and device for adjusting earphone audio parameters, earphone and storage medium |
| CN113099358B (en) * | 2020-01-08 | 2023-08-22 | 北京小米移动软件有限公司 | Method and device for adjusting earphone audio parameters, earphone and storage medium |
| WO2022188249A1 (en) * | 2021-03-12 | 2022-09-15 | 深圳快听科技有限公司 | Noise reduction apparatus and noise reduction earphone |
| US20230048416A1 (en) * | 2021-08-11 | 2023-02-16 | Sasha Tyan | Layered Earplugs with Pressure Reducing Mechanism |
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| CN101785327A (en) * | 2007-07-23 | 2010-07-21 | 艾瑟斯技术有限责任公司 | Diaphonic acoustic transduction coupler and ear bud |
| CA2665891A1 (en) * | 2008-05-14 | 2009-11-14 | Nevena Vlacic | Adjustable sound valve |
| CN102305301A (en) * | 2011-09-07 | 2012-01-04 | 李景魁 | Automatic release valve |
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Effective date of registration: 20220418 Address after: 315300 team 7, Tan Heyan village, Qiaotou town, Cixi City, Ningbo City, Zhejiang Province Patentee after: Luo Yinhao Address before: 518000 floor 4, plant a, Founder science and Technology Industrial Park, north of Songbai Road, Longteng community, Shiyan street, Bao'an District, Shenzhen, Guangdong Province Patentee before: SHENZHEN SHENGHONG INNOVATION TECHNOLOGY Co.,Ltd. |