CN203313398U - Single directive electret microphone structure - Google Patents
Single directive electret microphone structure Download PDFInfo
- Publication number
- CN203313398U CN203313398U CN2013203228720U CN201320322872U CN203313398U CN 203313398 U CN203313398 U CN 203313398U CN 2013203228720 U CN2013203228720 U CN 2013203228720U CN 201320322872 U CN201320322872 U CN 201320322872U CN 203313398 U CN203313398 U CN 203313398U
- Authority
- CN
- China
- Prior art keywords
- pole plate
- damping
- electret microphone
- vibrating diaphragm
- hole
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
The utility model discloses a single directive electret microphone structure which mainly consists of three parts which are an acoustic-electric conversion system, a damping structure and an impedance conversion system, wherein the acoustic-electric conversion system and the impedance conversion system are of a conventional single directive electret microphone system structure which receives a voice signal and amplifies and converts the voice signal to a voltage signal which can be applied directly, and the damping structure is arranged in an electret microphone and controls the sound pressure of a rear chamber of a vibrating diaphragm. The single directive electret microphone structure is characterized in that neither common tone tuning paper nor tulle is adopted as a damping material, fine air gaps are formed by adopting a metal structure and therefore the magnitude of the sound pressure of the rear chamber of the vibrating diaphragm can be controlled, and air damping formed by the metal structure is good in consistency and completely overcomes the defect that the above two damping materials can be deformed easily; the single directive electret microphone structure is advantaged by simple structure, assembling ease, and low manufacture cost.
Description
Technical field
The utility model relates to a kind of unidirectivity electret microphone structure.
Background technology
For the unidirectivity electret microphone, its operation principle is: due to the effect of electret microphone back cavity structure-borne sound damping, sound wave imports in different directions, be applied to that acoustic pressure on vibrating diaphragm is poor to change thereupon, form different pickup effects, under perfect condition, the strongest in 0 degree direction pickup effect, 180 degree direction pickups are the most weak.
Based on above principle, the realization of unidirectivity electret microphone at present and directive property control are mainly by vibrating diaphragm back cavity position, increasing acoustic damping material, mainly contain following two kinds of assembly structures:
The first: directly place damping material 101 at the PCB102 lower position, as Fig. 1;
The second: the medium position in structure is placed damping material 101, as Fig. 2;
These two kinds of structures are all that the cooperation by PCB102 air-vent and damping material 101 realizes unidirectivity and controls its consistency, general damping material is all to use adjustable sound paper or silk etc., under current state, the uncontrollability of damping material has affected the consistency effect of product unidirectivity.
The control of unidirectivity energy is main relevant to the gas permeability of damping material, and is subjected to the impact of gas permeability very large, and this just requires need to be controlled at a very little scope for the Air permenbility parameter of damping material.And no matter adjustable sound paper material used in the market is domestic or Japanese imported material, all can't adapt to this requirement, need before use to carry out can use after block-by-block test OK.The Air permenbility consistency of silk will be got well relatively, but also higher to the requirement of its fiber compactness, the increase greatly that has therefore brought cost.
Simultaneously, because these two kinds of damping materials easily are out of shape in processing and assembling process, thereby cause the variation of Air permenbility, this has more increased the inconsistency of properties of product.
The unidirectivity electret microphone had in addition also exist external structure require high, the design of external structure the noise robustness of product is had a significant impact and material cost too high, the problem such as part universality is not strong.
Summary of the invention
The technical problem that the utility model solves is for above-mentioned deficiency, a kind of unidirectivity electret microphone structure is provided, the utility model using " air damping " that metal structure forms substitute common adjustable sound paper or tulle as damping material, use metal structure to form trickle air gap, to control the size of vibrating diaphragm back cavity acoustic pressure, the air damping formed by metal structure, have good consistency, simultaneously, of the present utility model simple in structure, be easy to assembling, cost of manufacture is lower.
The technical solution of the utility model is as described below: a kind of unidirectivity electret microphone structure, comprise three parts, isolated voice call signal is converted to the acoustic-electric converting system of the signal of telecommunication, effectively control the damping structure to the damping of voice signal, the weak signal of high impedance is converted to low-impedance millivolt level signal impedance transformation system, it is characterized in that, described three systems closely connect, form an integral body from top to bottom, described damping structure comprises the first pole plate, metallic gasket, the second pole plate, described metallic gasket is located at the first pole plate, between the second pole plate, described the first pole plate and the second pole plate are provided with through hole, the voice signal entered from back PCB sound hole enters by the through hole of the second pole plate, the space that the metallic gasket of flowing through is separated out, through hole by the first pole plate flows out again, be applied to vibrating diaphragm, by the diameter of controlling plate through hole and the thickness of metallic gasket, can regulate the size that flows out voice signal.
Further, described the first pole plate is provided with two through holes, and described the second pole plate is provided with a through hole, is positioned in the middle of the second pole plate.
Further, described acoustic-electric converting system comprises vibrating diaphragm, pad, moulds ring, the first pole plate, copper ring, shell and Air Filter, described Air Filter is located at the outside of shell, vibrating diaphragm is located at the enclosure lower end, pad is placed on vibrating diaphragm, the first pole plate and moulding under ring, described the first pole plate and the second pole plate both sides are respectively equipped with one and mould ring, and top, both sides is respectively equipped with one near the copper ring of moulding ring.
The utility model does not adopt common adjustable sound paper or tulle as damping material, but uses metal structure to form trickle air gap, to control the size of vibrating diaphragm back cavity acoustic pressure, in the utility model, is referred to as " air damping ".
By the air damping that metal structure forms, have good consistency, and overcome the yielding defect of above-mentioned two kinds of damping materials appearance fully.Simultaneously, of the present utility model simple in structure, be easy to assembling, relatively above-mentioned two kinds of damping materials, cost of manufacture is lower.Such damping structure, when having reduced cost, promoted the quality of product greatly, and very high using value is arranged.
With existing best technique, compare, the utility model has the advantage of:
1. the utility model has been realized the effective control to the directive property same effect of unidirectivity electret microphone, in the batch production of product, its directive property no longer is subjected to the distortion of damping material, the impact of the defect such as inhomogeneous and occur inconsistent, in Element Design, just control the directivity effect fully, and be subject to the impact of subsequent production assembling and badly greatly reducing of bringing.
2. less demanding to external structure of the utility model, can not have influence on because of the design of external structure the noise robustness of product;
3. the cost of material is low for the utility model, and be easy to produce assembling, and can adapt to the design of various sizes size, and the structure of having used classical electret microphone, each part has very strong versatility.
The accompanying drawing explanation
Fig. 1 is prior art the first assembling schematic diagram;
Fig. 2 is prior art the second assembling schematic diagram;
Fig. 3 is the utility model basic block diagram;
Fig. 4 is the utility model voice signal flow graph.
Vibrating diaphragm in the drawings, 1; 2, pad; 3, the first pole plate; 4, metallic gasket; 5, mould ring; 6; The second pole plate; 7, copper ring; 8, shell; 9, Air Filter; 10, wiring board; 11 electronic devices and components; 12, voice signal; 101, damping material; 102, PCB; .
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment; technical scheme in the utility model embodiment is clearly and completely described; certainly; described embodiment is only the utility model part embodiment; rather than whole embodiment; based on claim in the utility model, except embodiment but belong in the claim scope, also all belong to the scope of the utility model protection.
As shown in Figure 3, principle of the present utility model is roughly: a kind of unidirectivity electret microphone structure, comprise three parts, isolated voice call signal is converted to the acoustic-electric converting system of the signal of telecommunication, effectively control the damping structure to the damping of voice signal, the weak signal of high impedance is converted to low-impedance millivolt level signal impedance transformation system, three systems closely connect, form an integral body from top to bottom, damping structure comprises the first pole plate 3, metallic gasket 4, the second pole plate 6, metallic gasket 4 is located at the first pole plate 3, between the second pole plate 6, the first pole plate 3 and the second pole plate 6 are provided with through hole, the voice signal entered from back PCB sound hole enters by the through hole of the second pole plate 6, the space that the metallic gasket 4 of flowing through is separated out, through hole by the first pole plate 3 flows out again, be applied to vibrating diaphragm 1, by the diameter of controlling plate through hole and the thickness of metallic gasket 4, can regulate the size that flows out voice signal, with this, realize the effect to " air damping ".Simultaneously, make by metal material due to pole plate and metallic gasket, degree of deformation is very little, and the consistency of its mechanical dimension also is easy to control, that is to say, " air damping " effect consistency also easily control.
The first pole plate 3 is provided with two through holes, and described the second pole plate 6 is provided with a through hole, is positioned in the middle of the second pole plate 6.
The acoustic-electric converting system comprises vibrating diaphragm 1, pad 2, moulds ring the 5, first pole plate 3, copper ring 7, shell 8 and Air Filter 9, described Air Filter 9 is located at the outside of shell 8, vibrating diaphragm 1 is located at shell 8 interior lower end, pad 2 is placed on vibrating diaphragm, the first pole plate 3 encircles under 5 with moulding, described the first pole plate 3 and the second pole plate 6 both sides are respectively equipped with one and mould ring 5, and top, both sides is respectively equipped with one near the copper ring 7 of moulding ring 5.
The each several part major function:
Acoustic-electric converting system: the operation principle that has mainly adopted electret capacitor, between vibrating diaphragm 1 and the first pole plate 3, separate and form electric capacity by pad 2, vibrating diaphragm is due to the effect vibration of voice signal, cause electric capacity to change, under the condition that the capacitor strap electric weight is fixed, the corresponding change occurs in the voltage at electric capacity two ends, thereby realizes the conversion ((arrow that in Fig. 3, below is directed upwards towards means the input of voice signal)) of sound-electric signal;
Impedance transformation system: the voltage signal of acoustic-electric converting system output and faint, for high impedance signal, can't be applied to general circuit, adopt the impedance transformation system to be converted into the Low ESR signal of millivolt level, be beneficial to the development and application of client's back-end circuit, the impedance transformation system is comprised of wiring board 10 and electronic devices and components 11.
Damping structure: following Fig. 4, the voice signal 12 entered from back PCB sound hole enters by the through hole of the second pole plate 6, the space that the metallic gasket 4 of flowing through is separated out, then flow out by the through hole of the first pole plate 3, be applied to vibrating diaphragm.By the diameter of controlling plate through hole and the thickness of metallic gasket, the size that can convection current goes out voice signal 12 is regulated, and realizes the effect to " air damping " with this.Simultaneously, make by metal material due to pole plate and metallic gasket, degree of deformation is very little, and the consistency of its mechanical dimension also is easy to control, that is to say, " air damping " effect consistency also easily control.
By above structure chart, can be found out, damping system is in the inside of product acoustic-electric converting system structure, the impedance transformation system is placed in the top of acoustic-electric converting system, and combine closely with it, last product total is carried out encapsulated moulding by the shell 8 in the acoustic-electric converting system, this structure is applicable to the microphone of various sizes size, and by current technical conditions, I realizes the making of Φ 3*1.5mm product.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improve and conversion all should belong to the protection range of the utility model claims.
The above has carried out exemplary description to the utility model patent by reference to the accompanying drawings; obviously the realization of the utility model patent is not subject to the restrictions described above; as long as adopted the method design of the utility model patent and the various improvement that technical scheme is carried out; or without improving, the design of the utility model patent and technical scheme are directly applied to other occasion, all at protection range of the present utility model.
Claims (3)
1. unidirectivity electret microphone structure, comprise three parts, isolated voice call signal is converted to the acoustic-electric converting system of the signal of telecommunication, effectively control the damping structure to the damping of voice signal, the weak signal of high impedance is converted to low-impedance millivolt level signal impedance transformation system, it is characterized in that, described three systems closely connect, form an integral body from top to bottom, described damping structure comprises the first pole plate (3), metallic gasket (4), the second pole plate (6), described metallic gasket (4) is located at the first pole plate (3), between the second pole plate (6), described the first pole plate (3) and the second pole plate (6) are provided with through hole, the voice signal entered from back PCB sound hole enters by the through hole of the second pole plate (6), the space that the metallic gasket (4) of flowing through is separated out, through hole by the first pole plate (3) flows out again, be applied to vibrating diaphragm (1), by the diameter of controlling plate through hole and the thickness of metallic gasket (4), can regulate the size that flows out voice signal.
2. a kind of unidirectivity electret microphone structure according to claim 1, be further characterized in that, described the first pole plate (3) is provided with two through holes, and described the second pole plate (6) is provided with a through hole, is positioned in the middle of the second pole plate (6).
3. a kind of unidirectivity electret microphone structure according to claim 1 and 2, be further characterized in that, described acoustic-electric converting system comprises vibrating diaphragm (1), pad (2), mould ring (5), the first pole plate (3), copper ring (7), shell (8) and Air Filter (9), described Air Filter (9) is located at the outside of shell (8), vibrating diaphragm (1) is located at shell (8) interior lower end, pad (2) is placed on vibrating diaphragm, the first pole plate (3) and moulding under ring (5), described the first pole plate (3) and the second pole plate (6) both sides are respectively equipped with one and mould ring (5), top, both sides is respectively equipped with one near moulding the copper ring (7) of ring (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203228720U CN203313398U (en) | 2013-06-06 | 2013-06-06 | Single directive electret microphone structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203228720U CN203313398U (en) | 2013-06-06 | 2013-06-06 | Single directive electret microphone structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203313398U true CN203313398U (en) | 2013-11-27 |
Family
ID=49619565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203228720U Expired - Fee Related CN203313398U (en) | 2013-06-06 | 2013-06-06 | Single directive electret microphone structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203313398U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104473628A (en) * | 2014-12-23 | 2015-04-01 | 东南大学 | Wearable cardiac sound monitoring device |
| CN109151691A (en) * | 2018-09-28 | 2019-01-04 | 广东得胜电子有限公司 | A kind of silicon miaow of adjustable directivity |
-
2013
- 2013-06-06 CN CN2013203228720U patent/CN203313398U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104473628A (en) * | 2014-12-23 | 2015-04-01 | 东南大学 | Wearable cardiac sound monitoring device |
| CN109151691A (en) * | 2018-09-28 | 2019-01-04 | 广东得胜电子有限公司 | A kind of silicon miaow of adjustable directivity |
| CN109151691B (en) * | 2018-09-28 | 2023-11-03 | 广东得胜电子有限公司 | Silicon microphone with adjustable directivity |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103686555B (en) | Miniature loudspeaker module group and method for enhancing frequency response of miniature loudspeaker module group, and electronic device | |
| CN102724605A (en) | Virtual bass enhancement processing method | |
| CN204465857U (en) | Dynamic iron unit | |
| CN203313398U (en) | Single directive electret microphone structure | |
| CN209462600U (en) | Loudspeaker and earphone | |
| CN203788341U (en) | Dustproof earplug and mobile terminal | |
| CN102547535A (en) | Piezoelectricity ceramic piece and piezoelectricity ceramic loudspeaker adopting same | |
| CN206042283U (en) | Initiative noise control earphone | |
| CN104581577B (en) | A kind of receiver of easy structure | |
| CN208522932U (en) | A kind of double magnetic are total to chamber earphone horn | |
| CN109104666B (en) | Loudspeaker and audio equipment and frequency response adjusting method thereof | |
| CN204392551U (en) | A kind of Dual Drive Microspeaker | |
| CN205510354U (en) | Head -mounted bone conduction earphone | |
| CN205622863U (en) | Vibrating diaphragm - voice coil loudspeaker voice coil subassembly and system | |
| CN203313397U (en) | Microphone capable of effectively filtering ambient noise | |
| CN204616092U (en) | A kind of electret microphone | |
| CN207947903U (en) | A kind of height adjustable speaker frame | |
| CN201426165Y (en) | Forward-direction coaxial telephone receiver | |
| CN105657600A (en) | Hybrid integrated receiver | |
| CN103079134A (en) | Self-adaptive telephone receiver | |
| CN203027424U (en) | Adaptive telephone receiver | |
| CN204836574U (en) | Anti -interference speaker | |
| CN204929177U (en) | High tone quality earphone speaker | |
| CN205105359U (en) | Cylindricality contact microphone | |
| CN204119503U (en) | Loudspeaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131127 Termination date: 20180606 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |