CN208299969U - A kind of active noise reduction earphone of sound guide tube and its composition - Google Patents
A kind of active noise reduction earphone of sound guide tube and its composition Download PDFInfo
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- CN208299969U CN208299969U CN201820048229.6U CN201820048229U CN208299969U CN 208299969 U CN208299969 U CN 208299969U CN 201820048229 U CN201820048229 U CN 201820048229U CN 208299969 U CN208299969 U CN 208299969U
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- guide tube
- sound guide
- noise reduction
- active noise
- table top
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Abstract
The utility model proposes a kind of this sound guide tube and its active noise reduction earphones of composition, are related to active noise reduction earphone field.Sound guide tube, including the reeded table top of tool, the reeded buckling surface of tool and leading note mouth, the table top have the groove of identical size with the buckling surface, and the buckling surface, which can be fastened on the table top, forms the unobstructed sound guide tube cavity of head and the tail.By installing sound guide tube in active noise reduction earphone back cavity inner walls, on the one hand loudspeaker can be promoted in the sensitivity of low frequency, promote the acoustic pressure rank that loudspeaker plays sound wave, the noise intensity that active noise reduction earphone is eliminated is bigger, on the other hand it is more conducive to microphone and captures noise signal, so that the measurement of noise signal is more accurate, the anti-acoustic capability of active noise reduction earphone is promoted.
Description
Technical field
The utility model relates to a kind of active noise reduction earphones, and in particular to the active noise reduction ear of a kind of sound guide tube and its composition
Machine.
Background technique
With the economic sustainable development with science and technology, active noise reduction techniques also reach its maturity.Active noise reduction earphone uses model
Enclose from it is military expand to it is civilian, and by more and more consumers recognize and buy.Under larger ambient noise, user is logical
Wearing active noise reduction earphone is crossed, noise can be effectively eliminated to its bring physical and mental injury.The principle of active noise reduction earphone is to pass through
Secondary sound source issues de-noising identical as noise signal amplitude, opposite in phase and believes that sound wave, de-noising sound wave and noise sound wave occur dry
It relates to, realizes that noise is eliminated.
For biggish ambient noise, to reach good anti-acoustic capability, secondary sound source need to be issued and noise magnitudes of acoustic waves
Comparable de-noising sound wave.The sounding device of secondary sound source is loudspeaker in active noise reduction earphone, and the sound that loudspeaker issues is strong
Degree is related with its sensitivity, and sensitivity is bigger, and the intensity of sound of identical input power, sending is bigger.To solve the above problems,
On the one hand the loudspeaker that sensitivity can be used big, but the cost of active noise reduction earphone can be greatly improved, reduce it on the market
Competitiveness；On the other hand, the intensity of sound that can also be improved sounding by using multiple loudspeakers, it is logical for big noise circumstance
It often needs multiple speaker combinations to can be only achieved requirement, increases the cost and volume of active noise reduction earphone, be unfavorable for actively
The popularization of noise cancelling headphone and user carry.
Utility model content
In consideration of it, the utility model embodiment is designed to provide the active noise reduction earphone of a kind of sound guide tube and its composition,
In the case where not increasing number of loudspeakers and loudspeaker construction itself not being transformed, the low frequency sensitivity of loudspeaker is improved.
In a first aspect, the utility model embodiment provides a kind of sound guide tube, comprising: have reeded table top, there is groove
Buckling surface and voice guide hole, the table top and the buckling surface have the groove of identical size, and the buckling surface can be fastened on
The unobstructed sound guide tube cavity of head and the tail is formed on the table top.
With reference to first aspect, the utility model embodiment provides the first possible embodiment of first aspect,
In: the table top includes fastening groove body, and the buckling surface includes fastening convex body.
With reference to first aspect, the utility model embodiment provides second of possible embodiment of first aspect,
In: the buckling surface fastens convex body and is embedded in the table top fastening groove body, and without embedded gap.
With reference to first aspect, the utility model embodiment provides the third possible embodiment of first aspect,
In: the sound guide tube is transversely or longitudinally extending using the voice guide hole as starting point.
With reference to first aspect, the utility model embodiment provides the 4th kind of possible embodiment of first aspect,
In: the leading note length of tube is 8mm-12mm.
With reference to first aspect, the utility model embodiment provides the 5th kind of possible embodiment of first aspect,
In: the sound guide tube cross section is circle.
With reference to first aspect, the utility model embodiment provides the 6th kind of possible embodiment of first aspect,
In: the leading note bore is 0.8mm-1.2mm.
Second aspect, the utility model embodiment also provide a kind of active noise reduction earphone, including earphone case, are set to ear
The intracorporal loudspeaker of casing is with microphone, active noise reduction system and including sound guide tube described above.
In conjunction with second aspect, the utility model embodiment provides the first possible embodiment of second aspect,
In: the sound guide tube is placed in the earphone back cavity inner walls.
In conjunction with second aspect, the utility model embodiment provides second of possible embodiment of second aspect,
In: the sound guide tube material is consistent with the material of the earphone case.
The utility model proposes a kind of this sound guide tube and its active noise reduction earphones of composition, are related to active noise reduction earphone neck
Domain.Sound guide tube, including the reeded table top of tool, the reeded buckling surface of tool and leading note mouth, the table top and the buckling surface
Groove with identical size, the buckling surface, which can be fastened on the table top, forms the unobstructed sound guide tube cavity of head and the tail.Pass through
Sound guide tube is installed in active noise reduction earphone back cavity inner walls, on the one hand can promote loudspeaker in the sensitivity of low frequency, mention
The acoustic pressure rank that loudspeaker plays sound wave is risen, the noise intensity that active noise reduction earphone is eliminated is bigger, on the other hand more sharp
Noise signal is captured in microphone, so that the measurement of noise signal is more accurate, promotes the anti-acoustic capability of active noise reduction earphone.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is a kind of sound guide tube table top front view that the utility model embodiment 1 provides；
Fig. 2 is a kind of sound guide tube buckling surface front view that the utility model embodiment 1 provides；
Fig. 3 is a kind of sound guide tube and active noise reduction earphone position relation schematic diagram that the utility model embodiment 2 provides；
Fig. 4 is that a kind of active noise reduction earphone speaker with sound guide tube that the utility model embodiment 2 provides is led with nothing
The same money noise cancelling headphone loudspeaker sensitivity comparison diagram of sound tube.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described
Embodiment be only the utility model a part of the embodiment, instead of all the embodiments.Usually described in attached drawing here
It can arrange and design with a variety of different configurations with the component of the utility model embodiment shown.Therefore, below to
The detailed description of the embodiments of the present invention provided in attached drawing is not intended to limit the model of claimed invention
It encloses, but is merely representative of the selected embodiment of the utility model.Based on the embodiments of the present invention, those skilled in the art exist
Every other embodiment obtained under the premise of creative work is not made, is fallen within the protection scope of the utility model.
Embodiment 1
Referring to the main view of sound guide tube table top, buckling surface shown in Fig. 1-2, the present embodiment proposes a kind of sound guide tube, comprising:
Having reeded table top 1, the reeded buckling surface 2 of tool and voice guide hole 3, above-mentioned table top has identical size with above-mentioned buckling surface
Groove, above-mentioned buckling surface, which can be fastened on above-mentioned table top, forms the unobstructed sound guide tube cavity of head and the tail.
In one embodiment, above-mentioned table top includes fastening groove body 11, and above-mentioned buckling surface includes fastening convex body 21.
Preferably, there is circle corresponding with round 13 on buckling surface 2 there are also the round 13 of protrusion on the playing surface 1
Pothole 23, above-mentioned round 13 can be inserted into round pothole 23.
In one embodiment, above-mentioned buckling surface fastens convex body 21 and is embedded in above-mentioned table top fastening groove body 11, and without interior
Filleting gap.So that the groove 21 of the groove 11 of above-mentioned stage body and above-mentioned buckling body is merged into a complete leading note lumen.
In one embodiment, above-mentioned sound guide tube is starting point with above-mentioned voice guide hole 3, transversely or longitudinally extending.Noise with
Voice guide hole 3 is entrance, by leading note lumen, is passed in active noise reduction earphone cavity.
In one embodiment, above-mentioned leading note length of tube is between 8mm-12mm.
In one embodiment, above-mentioned sound guide tube cross section is circle.
In one embodiment, above-mentioned leading note bore is between 0.8mm-1.2mm.
Sound guide tube can increase the low frequency sensitivity of loudspeaker, promotion degree to loudspeaker sensitivity and be promoted
Center frequency frequency is related with the cavity volume of the length of sound guide tube, internal diameter and noise cancelling headphone, thus the length of sound guide tube with
The specific value of internal diameter depends on the cavity volume of noise cancelling headphone, and different noise cancelling headphone cavity volumes is different, therefore, corresponding
The length of sound guide tube and the value of internal diameter also will differences.
Preferably, for certain a In-Ear active noise reduction earphone, determine that its leading note length of tube is 10mm, internal diameter 1mm.
Preferably, coil-moving speaker is used in the present embodiment.
Loudspeaker dispatches from the factory once production, and sensitivity is exactly definite value, cannot be changed, but it is influenced by a variety of conditions.
For coil-moving speaker, vibrophone, vibrophone compression or stretching air are driven by coil movement, thus propagation sound
Wave, such loudspeaker issue sound.Impedance of the air to loudspeaker is reduced, the sensitivity of loudspeaker can be increased.Pass through increasing
Add sound guide tube, can reduce impedance of the air to loudspeaker, improve loudspeaker sensitivity, and the degree that improves of sensitivity and corresponding
Frequency range and the length of sound guide tube are related with internal diameter.
Noise enters leading note tube chamber by voice guide hole, enters in noise cancelling headphone cavity via leading note lumen.Noise cancelling headphone
Increase sound guide tube in rear cavity wall, noise signal is easier in incoming noise cancelling headphone cavity, makes an uproar so that microphone is more easily detected
Acoustical signal, and the noise signal detected is more accurate, conducive to the noise reduction effect of optimization active noise reduction earphone.
Embodiment 2
Sound guide tube and active noise reduction earphone position relation schematic diagram shown in Figure 3.The present embodiment proposes that one kind has
The active noise reduction earphone of sound guide tube, above-mentioned active noise reduction earphone include earphone case, be set to the intracorporal loudspeaker of ear casing with
Microphone, active noise reduction system and above-mentioned sound guide tube.Above-mentioned loudspeaker, microphone are mounted in earphone case, active noise reduction
System is connect outside earphone case, through earphone wire body with the intracorporal loudspeaker of ear casing with microphone.
The noise signal transmission that microphone will test exports after active noise reduction system is handled and disappears to active noise reduction system
Noise cancellation signal plays the noise cancellation signal through loudspeaker, generates de-noising sound wave to loudspeaker.
In one embodiment, sound guide tube is integrally placed in the earphone back cavity inner walls.Sound guide tube is in earphone
The position placed in cavity wall afterwards does not require particularly.
Preferably, in the present embodiment, sound guide tube is mounted on earphone back cavity horizontal axis midpoint.
In one embodiment, above-mentioned sound guide tube material is consistent with the material of above-mentioned earphone case.
Preferably, the active noise reduction earphone speaker sensitivity with sound guide tube shown in Figure 4 with without sound guide tube
With money noise cancelling headphone loudspeaker sensitivity comparison diagram.Sound guide tube uses above-mentioned parameter: length 10mm, internal diameter 1mm.Loudspeaker
Centered on 200HZ frequency point, sensitivity is significantly improved compared with the noise cancelling headphone of no sound guide tube, up to 10dB.For master
Dynamic noise cancelling headphone, the frequency range of de-noising are concentrated mainly on 200Hz or so, and frequency range of the loudspeaker in 200Hz or so improves sensitivity
It is significant for active noise reduction earphone, noise cancelling headphone is worked under the bigger noise scenarios of noise intensity, without
Increase loudspeaker or transformation loudspeaker itself, reduces costs, and this method is easy to implement.
In several embodiments provided herein, it should be understood that disclosed device and method, it can be by other
Mode realize.The apparatus embodiments described above are merely exemplary, for example, the division of the unit, only one
Kind of logical function partition, there may be another division manner in actual implementation, in another example, multiple units or components can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be through some communication interfaces, the INDIRECT COUPLING or logical of device or unit
Letter connection can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
Claims (10)
1. a kind of sound guide tube, which is characterized in that including having reeded table top, the reeded buckling surface of tool and voice guide hole, institute
The groove that table top has identical size with the buckling surface is stated, it is unobstructed that the buckling surface is fastened on formation head and the tail on the table top
Sound guide tube cavity.
2. sound guide tube according to claim 1, which is characterized in that the table top includes fastening groove body, the fastening bread
Include fastening convex body.
3. sound guide tube according to claim 2, which is characterized in that the buckling surface fastens convex body and is embedded in the table top button
Groove body is closed, and without embedded gap.
4. sound guide tube according to claim 1, which is characterized in that the sound guide tube is using the voice guide hole as starting point, laterally
Or longitudinal extension.
5. sound guide tube according to claim 1, which is characterized in that the leading note length of tube is 8mm-12mm.
6. sound guide tube according to claim 1, which is characterized in that the sound guide tube cross section is circle.
7. sound guide tube according to claim 1, which is characterized in that the leading note bore is 0.8mm-1.2mm.
8. a kind of active noise reduction earphone, which is characterized in that including earphone case, be set to the intracorporal loudspeaker of ear casing and Mike
Wind, active noise reduction system and including any sound guide tube of the claims 1-7.
9. active noise reduction earphone according to claim 8, which is characterized in that the sound guide tube is placed on the earphone case
On inner wall.
10. active noise reduction earphone according to claim 8, which is characterized in that the sound guide tube material and the ear casing
The material of body is consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820048229.6U CN208299969U (en) | 2018-01-11 | 2018-01-11 | A kind of active noise reduction earphone of sound guide tube and its composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820048229.6U CN208299969U (en) | 2018-01-11 | 2018-01-11 | A kind of active noise reduction earphone of sound guide tube and its composition |
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| Publication Number | Publication Date |
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| CN208299969U true CN208299969U (en) | 2018-12-28 |
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| CN201820048229.6U Expired - Fee Related CN208299969U (en) | 2018-01-11 | 2018-01-11 | A kind of active noise reduction earphone of sound guide tube and its composition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114584912A (en) * | 2022-03-04 | 2022-06-03 | 上海诚听音优医疗器械有限公司 | Method for manufacturing front cavity sound guide tube of customized wireless earphone |
-
2018
- 2018-01-11 CN CN201820048229.6U patent/CN208299969U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114584912A (en) * | 2022-03-04 | 2022-06-03 | 上海诚听音优医疗器械有限公司 | Method for manufacturing front cavity sound guide tube of customized wireless earphone |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181228 |