CN112188337A - Active noise reduction earphone and method for changing water bed effect of active noise reduction earphone - Google Patents
Active noise reduction earphone and method for changing water bed effect of active noise reduction earphone Download PDFInfo
- Publication number
- CN112188337A CN112188337A CN201910583706.8A CN201910583706A CN112188337A CN 112188337 A CN112188337 A CN 112188337A CN 201910583706 A CN201910583706 A CN 201910583706A CN 112188337 A CN112188337 A CN 112188337A
- Authority
- CN
- China
- Prior art keywords
- sound
- active noise
- noise reduction
- earphone
- microphone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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 relates to an active noise reduction earphone and a method for changing the water bed effect of the active noise reduction earphone. An active noise reducing headphone, comprising: the sound-emitting device comprises a shell, wherein an inner cavity is formed in the shell, a sound emitting hole and a sound receiving hole are formed in the shell, the sound emitting hole is communicated with the outside and the inner cavity, and the sound receiving hole is communicated with the outside and the inner cavity; the inner chamber is provided with the microphone and inhales the sound spare, inhale the sound spare and fill the microphone with between the sound receiving hole, so that pass through the sound receiving hole gets into the medium of inner chamber need pass through earlier just can be acquireed by the microphone after inhaling the sound spare. A method for changing the water bed effect of an active noise reduction earphone comprises the following steps that a sound absorbing piece is filled between a sound collecting hole in an earphone shell and a microphone in the earphone shell. Has the advantages of reducing wind noise and reducing water bed effect.
Description
Technical Field
The invention relates to the technical field of earphones, in particular to an active noise reduction earphone and a method for changing the water bed effect of the active noise reduction earphone.
Background
There are two methods for reducing noise of earphones, namely active noise reduction and passive noise reduction.
The active noise reduction function is to generate reverse sound waves equal to external noise through a noise reduction system to neutralize the noise, so that the noise reduction effect is realized. Specifically, the noise in the environment that the ear can hear is detected by a sound receiving unit arranged in the earphone; then the noise signal is transmitted to a noise reduction circuit, the noise reduction circuit calculates the reverse sound wave equal to the noise in real time, the frequency spectrum of the reverse sound wave is completely the same as the noise to be eliminated, and only the phase is just opposite (the difference is 180 degrees); the loudspeaker unit emits reverse sound waves to counteract noise; the noise then disappears and is not audible.
The wind noise is generated because wind blows turbulent sound generated by friction between the earphone structure and the earphone structure, especially wind noise blowing to a sound inlet hole of the earphone shell, and the wind noise is not easy to be eliminated by the active noise reduction function, but may be lifted to influence the noise reduction effect.
Disclosure of Invention
In view of the above, it is desirable to provide an active noise reduction earphone and a method for changing the water bed effect of the active noise reduction earphone.
An active noise reducing headphone, comprising:
the sound-emitting device comprises a shell, wherein an inner cavity is formed in the shell, a sound emitting hole and a sound receiving hole are formed in the shell, the sound emitting hole is communicated with the outside and the inner cavity, and the sound receiving hole is communicated with the outside and the inner cavity;
the inner chamber is provided with the microphone and inhales the sound spare, inhale the sound spare and fill the microphone with between the sound receiving hole, so that pass through the sound receiving hole gets into the medium of inner chamber need pass through earlier just can be acquireed by the microphone after inhaling the sound spare.
In one embodiment, the sound absorbing member is provided with a plurality of pores.
In one embodiment, at least a portion of the pores are interconnected.
In one embodiment, the pores are filled with fibers.
In one embodiment, the housing includes a front housing and a rear housing, the sound outlet hole is provided on the front housing, and the sound absorbing hole is provided on the rear housing.
In one embodiment, the acoustic hole is disposed at a side end of the housing.
A method for changing the water bed effect of an active noise reduction earphone comprises the following steps that a sound absorbing piece is filled between a sound collecting hole in an earphone shell and a microphone in the earphone shell.
In one embodiment, the sound absorbing member is provided with a plurality of pores.
In one embodiment, the density of the sound absorbing member is changed.
In one embodiment, the active noise reduction earphone is any one of the active noise reduction earphones described above.
Has the advantages that:
1. external wind reaches the sound absorbing piece, is blocked by the sound absorbing piece, generates damping, reduces or eliminates turbulence, and further reduces or eliminates wind noise.
2. The noise of high-frequency in the part can be separated through the sound absorbing piece, the high-frequency noise in the part can not be acquired by the microphone, and then can not be emitted from the loudspeaker through the microphone, so that the noise of medium-frequency and high-frequency is reduced when the low-frequency noise of the active noise reduction earphone is reduced, and the water bed effect is reduced.
Drawings
FIG. 1 is an exploded view of an active noise reducing earphone according to an embodiment of the present application;
fig. 2 is a side cross-sectional view of an active noise reducing headphone in one embodiment of the present application.
Reference numerals: 100. a housing; 101. a front housing; 102. a rear housing; 110. an upper side end; 120. a lower side end; 130. a left side end; 140. a right side end; 150. a front portion; 160. a rear portion; 200. an inner cavity; 300. a sound outlet; 310. a sound receiving hole; 400. a speaker; 500. a microphone; 510. a radio receiving end; 600. a sound absorbing member.
Detailed Description
To facilitate an understanding of the invention, the invention is described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Fig. 1 is an exploded view of an active noise reduction earphone according to an embodiment, the active noise reduction earphone includes a housing 100, the housing 100 has an inner cavity 200, the housing 100 is provided with a sound outlet 300 and a sound receiving hole 310, the sound outlet 300 is communicated with the outer environment and the inner cavity 200, and the sound receiving hole 310 is also communicated with the outer environment and the inner cavity 200. The inner cavity 200 is internally provided with a sounding unit, a sound receiving unit and a noise reduction unit, and the noise reduction unit is electrically connected with the sounding unit and the sound receiving unit. The noise reduction unit comprises a circuit board and a noise reduction circuit arranged on the circuit board. The sound emitting unit includes a speaker 400. The sound receiving unit includes a microphone 500. Inside the inner cavity 200, a speaker 400, a microphone 500, and a sound absorbing member 600 are sequentially arranged in a direction from the sound outlet hole 300 to the sound receiving hole 310. During operation, the sound that speaker 400 sent is propagated away from in the sound hole 300, and external sound gets into inner chamber 200 and is acquireed by microphone 500 through sound receiving hole 310, and after microphone 500 acquireed external sound, convert sound into the signal of telecommunication and feed back to the circuit of making an uproar, calculate reverse sound wave in real time through the circuit of making an uproar, launch reverse sound wave through speaker 400 and offset the noise to realize the function of making an uproar of initiatively falling.
When the noise is actively reduced, not only the noise enters the sound receiving hole 310, but also wind blows into the sound receiving hole 310. Turbulent flow, also known as turbulence, turbulence or turbulent flow. In some environments with large airflow, such as windy, sudden door closing or subway start, etc., turbulence is formed around the microphone 500, the turbulence directly impacts the diaphragm of the microphone 500 to saturate the microphone 500, and the turbulence received by the microphone 500 is amplified by the controller and transmitted to the speaker 400, thereby causing the active noise reduction earphone to generate significant air burst and wind noise.
In one embodiment, a sound absorbing member 600 is further disposed between the microphone 500 and the sound receiving hole 310, the sound absorbing member 600 may be made of a porous material, and external sound, wind, or the like may reach the sound absorbing member 600 after passing through the sound receiving hole 310, and the external sound, wind, or the like may not be directly captured by the microphone 500 through the blocking of the sound absorbing member 600. When external sound or wind reaches the sound absorbing member 600, the sound absorbing member is dispersed in a multi-hole structure in a multi-direction manner, so that damping is generated, disturbance of airflow is reduced, and the purpose of reducing or eliminating turbulence and wind noise is achieved. In some embodiments, the sound absorbing member 600 may be made of a material such as foam or rubber.
In one embodiment, the sound absorbing member 600 is filled in the inner cavity 200, and the medium entering the inner cavity 200 through the sound receiving hole 310 needs to pass through the sound absorbing member 600 before being captured by the microphone 500, and the medium may be sound or air, that is, the sound absorbing member 600 blocks the medium from propagating, so that the medium entering the inner cavity 200 from the sound receiving hole 310 needs to pass through the sound absorbing member 600 before reaching the microphone 500. For example, the sound absorbing member 600 is provided with a plurality of pores, which are mostly open-ended openings with through-holes therein, and are subjected to air molecular friction and viscous resistance, so that kinetic energy of the airflow is converted into heat energy, thereby achieving the effect of reducing or eliminating turbulence and thus wind noise. In one embodiment, the pores are filled with fine fibers, and the medium moves in the pores to drive the fine fibers to vibrate mechanically, so that the kinetic energy of the medium movement is consumed, and the turbulence is further reduced, so that the wind noise is reduced.
Further, the area between the microphone 500 and the acoustic hole 310 is filled with the sound absorbing member 600, and the sound absorbing member 600 may be fibers, and pores are formed between the fibers.
Fig. 2 is a side cross-sectional view of an active noise reducing headphone in one embodiment, as shown in fig. 1 and 2, including an upper end 110, a lower end 120, a left end 130, a right end 140, a front 150, and a rear 160. As shown in fig. 1, the acoustic opening 310 is disposed at the right end 140 of the casing 100, as shown in fig. 2, in the viewing angle shown in fig. 2, the right side of the microphone 500 is a sound receiving end 510, and the axial direction of the acoustic opening 310 is perpendicular to the sound receiving end 510 of the microphone 500, i.e. the sound receiving end 510 of the microphone 500 is not directly opposite to the acoustic opening 310, so that it is further difficult for the medium passing through the acoustic opening 310 to be directly captured by the sound receiving end 510 of the microphone 500, the residence time of the medium in the sound absorbing member 600 is increased, the consumption of the medium energy by the sound absorbing member 600 is increased, further, the turbulence is reduced, and the wind noise is reduced. In other embodiments, the acoustic hole 310 may be disposed at the upper end 110 or the lower end 120 of the housing 100; the acoustic port 310 may even be located at the rear 160 of the housing 100 as long as the sound receiving end 510 of the microphone 500 is offset from the acoustic port 310 by a distance such that the acoustic port 310 does not face the sound receiving end 510.
In one embodiment, as shown in fig. 1, the housing 100 includes a front housing 101 and a rear housing 102, the front housing 100 and the rear housing 100 snap-fit to enclose the internal cavity 200. The sound outlet 300 is provided in the front case 101, and the sound receiving hole 310 is provided in the rear case 102. Specifically, the acoustic hole 310 is disposed at a side end of the rear housing 102, for example, the acoustic hole 310 may be disposed at the upper side end 110, the lower side end 120, the left side end 130, or the right side end 140 of the rear housing 102. For example, as shown in fig. 1, the acoustic opening 310 is disposed at the right end 140 of the rear housing 102, the extending direction of the acoustic opening 310 is left and right, and the acoustic end 510 of the microphone 500 faces the rear portion 160 of the housing 100, i.e., the direction in which the microphone 500 receives sound is front and back, so that wind noise generated when external wind directly blows on the acoustic end 510 of the microphone 500 can be avoided.
When the active noise reduction earphone works, the suppression of noise in some frequency bands causes the amplification of noise in other frequency bands, which is known as water bed effect. Specifically, the active noise reduction earphone raises medium-high frequency noise of several kilohertz while reducing noise of several hundred hertz. The sound absorbing member 600 can further absorb the medium and high frequency noise, thereby alleviating the water bed effect. In some embodiments, the sound absorbing members 600 with different densities can be filled according to the usage of the product, so as to make the active noise reduction earphone alleviate the water bed effect in different degrees, and the adjustment principle is that the density of the sound absorbing member 600 is increased, the more the blocking amount of the middle and high frequency noise is, the wider the extent of the blocked bandwidth from the high frequency to the low frequency is, and thus the better the blocking effect is.
In one embodiment, a method for changing the water bed effect of an active noise reduction earphone is provided, wherein the active noise reduction earphone is the earphone in any one of the above embodiments, and a sound absorbing member 600 is filled between the sound collecting hole 310 on the earphone housing 100 and the microphone 500 in the earphone housing 100. The active noise reduction earphone can enhance medium-high frequency noise due to the water bed effect, and can block part of the medium-high frequency noise through the sound absorption piece 600, and the medium-high frequency noise can not be acquired by the microphone 500 and further can not be emitted from the loudspeaker 400 through the microphone 500, so that the active noise reduction earphone reduces low-frequency noise, and simultaneously also reduces the medium-high frequency noise, namely the water bed effect.
In one embodiment, the sound absorbing member 600 is provided with a plurality of apertures, which facilitate the entry of low-frequency noise from the outside into the microphone 500. The sound wave goes deep into the pores of the material, and the pores are mostly open pores with mutually communicated inner parts and are subjected to air molecule friction and viscous resistance, so that the sound energy is converted into heat energy. The sound absorption coefficient of the porous sound absorption material generally increases gradually from low frequency to high frequency, so that the sound absorption effect on high frequency and medium frequency sound is better, and medium-high frequency noise is reduced. Finally, the noise entering the microphone 500 is only low frequency, after the microphone 500 obtains the low frequency noise, the low frequency noise is converted into an electric signal and fed back to the noise reduction circuit, the reverse sound wave is calculated in real time through the noise reduction circuit, and the reverse sound wave is emitted through the loudspeaker 400 to offset the noise, so that the active noise reduction function is realized, and the water bed effect is reduced.
In one embodiment, the water bed effect of the active noise reduction earphone is changed by changing the density of the sound absorbing member 600. For example, when the density of the sound absorbing member 600 is increased, the pores of the sound absorbing member 600 become denser, and are subjected to air molecular friction and viscous resistance, so that more sound energy is converted into heat energy, and thus the absorption width for high frequency to medium frequency is wider, the blocking bandwidth is wider extending from high frequency to low frequency, and the suppression of the water bed effect is better. However, the excessive density will further cause a certain separation to the low-frequency noise, and further reduce the noise reduction effect of the active noise reduction earphone on the low-frequency noise, so that the sound absorption member 600 with a proper density is selected according to the requirements of the earphone on different noise reduction capabilities in different occasions, and different noise reduction effects can be brought.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An active noise reduction earphone, comprising:
the sound-emitting device comprises a shell, wherein an inner cavity is formed in the shell, a sound emitting hole and a sound receiving hole are formed in the shell, the sound emitting hole is communicated with the outside and the inner cavity, and the sound receiving hole is communicated with the outside and the inner cavity;
the inner chamber is provided with the microphone and inhales the sound spare, inhale the sound spare and fill the microphone with between the sound receiving hole, so that pass through the sound receiving hole gets into the medium of inner chamber need pass through earlier just can be acquireed by the microphone after inhaling the sound spare.
2. The active noise reduction earphone according to claim 1, wherein the sound absorbing member has a plurality of apertures formed therein.
3. The active noise reducing earphone according to claim 2, wherein at least some of the plurality of apertures are interconnected.
4. The active noise reduction earphone according to claim 3 wherein the voids are filled with fibers.
5. The active noise reduction earphone of claim 1 wherein the housing comprises a front housing and a rear housing, the sound outlet hole being disposed on the front housing and the sound receiving hole being disposed on the rear housing.
6. The active noise reducing earphone according to claim 1, wherein the acoustic hole is disposed at a side end of the housing.
7. A method for changing the water bed effect of an active noise reduction earphone is characterized by comprising the following steps of filling a sound absorbing piece between a sound collecting hole in an earphone shell and a microphone in the earphone shell.
8. The method of changing the water bed effect of an active noise reducing earphone according to claim 7 wherein the sound absorbing member is provided with a plurality of apertures.
9. The method of changing the water bed effect of an active noise reducing earphone according to claim 8 wherein the density of the sound absorbing member is changed.
10. The method of changing the water bed effect of an active noise reducing headphone according to claim 7, wherein the active noise reducing headphone is the active noise reducing headphone according to any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910583706.8A CN112188337A (en) | 2019-07-01 | 2019-07-01 | Active noise reduction earphone and method for changing water bed effect of active noise reduction earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910583706.8A CN112188337A (en) | 2019-07-01 | 2019-07-01 | Active noise reduction earphone and method for changing water bed effect of active noise reduction earphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112188337A true CN112188337A (en) | 2021-01-05 |
Family
ID=73915393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910583706.8A Pending CN112188337A (en) | 2019-07-01 | 2019-07-01 | Active noise reduction earphone and method for changing water bed effect of active noise reduction earphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112188337A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024088223A1 (en) * | 2022-10-28 | 2024-05-02 | 深圳市韶音科技有限公司 | Earbud |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625201A (en) * | 2012-03-07 | 2012-08-01 | 深圳市福智软件技术有限公司 | Wind noise reducing device for microphone |
| CN202738070U (en) * | 2012-03-07 | 2013-02-13 | 深圳市福智软件技术有限公司 | Microphone wind noise reducing device |
| CN203301692U (en) * | 2013-06-05 | 2013-11-20 | 歌尔声学股份有限公司 | Vocal cavity structure reducing microphone pickup wind noise |
| CN204498332U (en) * | 2015-04-14 | 2015-07-22 | 歌尔声学股份有限公司 | A kind of windproof noise reducing mechanism of earphone and earphone |
| CN205829952U (en) * | 2016-06-20 | 2016-12-21 | 歌尔股份有限公司 | A kind of noise cancelling headphone |
-
2019
- 2019-07-01 CN CN201910583706.8A patent/CN112188337A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625201A (en) * | 2012-03-07 | 2012-08-01 | 深圳市福智软件技术有限公司 | Wind noise reducing device for microphone |
| CN202738070U (en) * | 2012-03-07 | 2013-02-13 | 深圳市福智软件技术有限公司 | Microphone wind noise reducing device |
| CN203301692U (en) * | 2013-06-05 | 2013-11-20 | 歌尔声学股份有限公司 | Vocal cavity structure reducing microphone pickup wind noise |
| CN204498332U (en) * | 2015-04-14 | 2015-07-22 | 歌尔声学股份有限公司 | A kind of windproof noise reducing mechanism of earphone and earphone |
| CN205829952U (en) * | 2016-06-20 | 2016-12-21 | 歌尔股份有限公司 | A kind of noise cancelling headphone |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024088223A1 (en) * | 2022-10-28 | 2024-05-02 | 深圳市韶音科技有限公司 | Earbud |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110036652B (en) | Acoustic transducer | |
| US11575985B2 (en) | Mass loaded earbud with vent chamber | |
| JP5695703B2 (en) | Earphone with acoustic tuning mechanism | |
| WO2020220733A1 (en) | Earphone without blocking ears | |
| CN106210971B (en) | Passive acoustic radiator module | |
| US10051357B2 (en) | Pressure equalization in earphones | |
| JPWO2013114864A1 (en) | earphone | |
| US9301041B2 (en) | Headphone device | |
| US20210160627A1 (en) | Earpieces and related articles and devices | |
| RU2462830C2 (en) | Device for hearing protection | |
| JP6660402B2 (en) | Protective helmet | |
| CN210579147U (en) | Noise reduction earphone | |
| CN113242485A (en) | In-ear earphone | |
| CN106454627A (en) | Waterproof sound production device and earphone | |
| CN112188337A (en) | Active noise reduction earphone and method for changing water bed effect of active noise reduction earphone | |
| CN112437379B (en) | In-ear earphone | |
| GB2595971A (en) | Earphone body with tuned vents | |
| CN109951769A (en) | Stereo set with multiple oscillating plates | |
| CN112584265B (en) | Earphone set | |
| CN105187968A (en) | Conversation earphone | |
| JP5367989B2 (en) | Inner ear headphones | |
| CN220528221U (en) | Earphone | |
| CN216490978U (en) | In-ear earphone with compact structure | |
| WO2023246613A1 (en) | Acoustic apparatus | |
| CN215072932U (en) | Earphone tuning structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 35th floor, block a, Tanglang City, 3333 Liuxian Avenue, Nanshan District, Shenzhen, Guangdong 518000 Applicant after: Wanmo acoustics Co.,Ltd. Address before: 140513 industrial building, nanliaoshan District, Shenzhen Applicant before: 1MORE Inc. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210105 |