CN209882018U - Novel noise-reducing earphone line control board - Google Patents
Novel noise-reducing earphone line control board Download PDFInfo
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- CN209882018U CN209882018U CN201920932443.2U CN201920932443U CN209882018U CN 209882018 U CN209882018 U CN 209882018U CN 201920932443 U CN201920932443 U CN 201920932443U CN 209882018 U CN209882018 U CN 209882018U
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Abstract
The utility model belongs to the technical field of the cell-phone microphone technique and specifically relates to a novel noise reduction earphone drive-by-wire board. The microphone comprises a shell, a positive microphone, a negative microphone and a control chip, wherein the positive microphone, the negative microphone and the control chip are respectively arranged in the shell; the positive microphone and the negative microphone are connected in series and then connected with the control chip, the positive microphone and the negative microphone are connected with the control chip through a capacitor to amplify signals, and the distance between the positive microphone and the negative microphone is adjustable. The utility model has the advantages that the structure is simple, the external noise is eliminated by utilizing the principle that the microphone of the microphone; meanwhile, in different noise environments, the distance of the forward and reverse microphone can be adjusted, so that smaller environmental noise and clearer sound effect can be obtained, and the best communication effect can be realized.
Description
Technical Field
The utility model belongs to the technical field of the cell-phone microphone technique and specifically relates to a novel noise reduction earphone drive-by-wire board.
Background
The earphone drive-by-wire board is a common electroacoustic device, and the main function of the earphone drive-by-wire board is to control the receiving and sending of the external mobile phone microphone loudspeaker and the music playing.
However, most of the existing earphone drive-by-wire boards do not have the function of noise reduction, so that when the earphone drive-by-wire boards are used in a noise environment, the sound definition is greatly reduced. Some earphone line control boards have the noise reduction function, but the noise reduction function is not obvious, and the noise reduction function cannot be adjusted according to different noise environments, so that the best sound effect is obtained.
Therefore, it is necessary to provide an improved scheme for the existing earphone line control board to improve the noise reduction performance of the earphone line control board to the maximum extent, and meet the use requirements under different noise environments, so as to obtain smaller environmental noise and clearer conversation effect.
SUMMERY OF THE UTILITY MODEL
To the not enough of above-mentioned prior art existence, the utility model aims to provide a novel noise reduction earphone drive-by-wire board.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a novel noise reduction earphone line control board comprises a shell, a positive polarity microphone, a negative polarity microphone and a control chip, wherein the positive polarity microphone, the negative polarity microphone and the control chip are respectively arranged in the shell; the positive microphone and the negative microphone are connected in series and then connected with the control chip, the positive microphone and the negative microphone are connected with the control chip through a capacitor to amplify signals, and the distance between the positive microphone and the negative microphone is adjustable.
Preferably, the positive polarity microphone is a back-pole microphone with positive polarity output, and the negative polarity microphone is a diaphragm microphone with negative polarity output.
Preferably, the casing includes an outer casing and an inner casing, a pull groove is provided in the outer casing, one end of the inner casing is slidably connected in the pull groove, the positive polarity microphone and the negative polarity microphone are respectively arranged on the inner side walls of the outer casing and the inner casing, and the distance between the positive polarity microphone and the negative polarity microphone can be adjusted when the outer casing slides relative to the inner casing.
Preferably, in the control chip inner shell, a signal line is arranged at one end of the inner shell, which is exposed out of the drawing groove.
Preferably, it also comprises a speaker, said speaker being connected to the control chip.
Preferably, after the positive microphone and the negative microphone are connected in series, one end of the positive microphone and one end of the negative microphone are grounded, and the other end of the positive microphone and the other end of the negative microphone are connected with the control chip through a resistor.
Preferably, only one integrated chip is integrated in the control chip.
By adopting the scheme, the utility model has the advantages that the structure is simple, the external noise is eliminated by utilizing the principle that the microphone of; meanwhile, in different noise environments, the distance of the forward and reverse microphone can be adjusted, so that smaller environmental noise and clearer sound effect can be obtained, the best conversation effect can be realized, and the microphone has very high practical value and market popularization value.
Drawings
Fig. 1 is a schematic diagram of a circuit structure of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a housing according to an embodiment of the present invention.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
As shown in fig. 1 to fig. 2, the embodiment of the present invention provides a novel noise reduction earphone line control board, which includes a housing, and a positive microphone MIC1, a negative microphone MIC2 and a control chip IC, which are respectively disposed in the housing; the positive microphone MIC1 and the negative microphone MIC2 are connected in series and then connected with the control chip IC, the positive microphone MIC1 and the negative microphone MIC2 are connected with the control chip IC through a capacitor C to amplify signals, an amplifier is integrated in the control chip IC, and the distance between the positive microphone MIC1 and the negative microphone MIC2 is adjustable. Therefore, the earphone line control board of the embodiment simultaneously acquires the sound in the environment through the two microphone microphones with opposite polarities, the positive microphone MIC1 and the negative microphone MIC2 are connected in series to the control chip IC of the line control board, and the signals received by the two microphones (namely the positive microphone MIC1 and the negative microphone MIC2) enter the control chip IC through the capacitor C to be subjected to signal amplification processing; theoretically, when receiving a voice signal, because the polarities of the output signals are opposite and cancel each other, the output is zero, but in the actual use process, when a user speaks, the positive microphone MIC1 can be closer to the sound emitted by the mouth of the user, the received sound is the environmental sound with a stronger signal, and the negative microphone MIC2 can be further away from the sound emitted by the mouth of the user, so that more of the environmental noise is received by the negative microphone MIC2, and the stronger environmental voice signal received by the positive microphone MIC1 is used for canceling (i.e. subtracting) the noise signal received by the negative microphone MIC2, so that a clearer and more accurate voice signal can be obtained. The concrete formula is as follows:
MIC1 speech signal-MIC 2 noise signal ═ clear speech signal
The larger the distance between two microphones (namely between the positive microphone MIC1 and the negative microphone MIC2), the more obvious the noise reduction effect is, but the sensitivity is reduced, so that according to different use environments, the point with the best noise reduction and sensitivity effects can be found by adjusting the distance between the positive microphone MIC1 and the negative microphone MIC2, the noise is reduced, and the sensitivity is not reduced obviously, so that the best effect is achieved.
Based on the structure, the wire control board has a simple structure, eliminates external noise by utilizing the principle of reverse cancellation of the forward microphone and the reverse microphone, and realizes the excellent function of clear conversation in a noisy environment; meanwhile, in different noise environments, the distance of the forward and reverse microphone can be adjusted, so that smaller environmental noise and clearer sound effect can be obtained, the best conversation effect can be realized, and the microphone has very high practical value and market popularization value.
Further, in the present embodiment, preferably, the positive-polarity microphone MIC1 is a back-pole microphone with positive-polarity output, and the negative-polarity microphone MIC2 is a diaphragm microphone with negative-polarity output. Through the combined application of the back-pole microphone and the diaphragm microphone, a clearer sound effect is achieved through mutual offset.
In order to optimize the structure of the case so as to adjust the distance between the two microphones, referring to fig. 2, the case of the present embodiment includes an outer case 3 and an inner case 4, a pull groove 5 is provided in the outer case 3, one end of the inner case 4 is slidably connected in the pull groove 5, a positive microphone MIC1 and a negative microphone MIC2 are respectively built in the inner side walls of the outer case 3 and the inner case 4, and the distance between the positive microphone MIC1 and the negative microphone MIC2 can be adjusted when the outer case 3 slides relative to the inner case 4. Through the casing that adopts the pull formula, utilize the structural design of pull groove 5, make shell 3 can make the pull motion relatively inner shell 4 (or inner shell 4 can be relative shell 3), positive polarity miaow head microphone MIC1 can install the inside end at shell 3, negative polarity miaow head microphone MIC2 can install the one end of keeping away from shell 3 inside the inner shell 4, thereby through the mode of pull, can conveniently adjust the distance between positive polarity miaow head microphone MIC1 and the negative polarity miaow head microphone MIC2, find the most suitable distance, let the user obtain littleer ambient noise and clearer conversation effect.
Further, as a preferable scheme, referring to fig. 2, in the control chip IC inner case 4 of the present embodiment, a signal line 6 is disposed at one end of the inner case 4 exposed to the drawing slot 5. During specific use, the signal line 6 can be held by hand, so that the positive microphone MIC1 in the housing 3 is closer to the mouth of a user, and the distance between the positive microphone MIC1 and the negative microphone MIC2 can be adjusted conveniently by pulling the housing 3.
Further, as a preferable scheme, the present embodiment further includes a speaker SPK, and the speaker SPK is connected to the control chip IC.
Further, preferably, the positive microphone MIC1 and the negative microphone MIC2 of the present embodiment are connected in series, and then one end of the connection is grounded and the other end of the connection is connected to the control chip IC through a resistor.
Further, as a preferable scheme, only one integrated chip IC is integrated in the control chip IC of the present embodiment. By adopting an IC binding technology, the original two control chip ICs and a plurality of resistance-capacitance elements are integrated in one binding integrated chip IC, so that the layout structure of the wire control PCB can be simplified, the production cost is reduced, and the production efficiency is improved.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.
Claims (7)
1. The utility model provides a novel noise reduction earphone drive-by-wire board which characterized in that: the microphone comprises a shell, a positive microphone, a negative microphone and a control chip, wherein the positive microphone, the negative microphone and the control chip are respectively arranged in the shell; the positive microphone and the negative microphone are connected in series and then connected with the control chip, the positive microphone and the negative microphone are connected with the control chip through a capacitor to amplify signals, and the distance between the positive microphone and the negative microphone is adjustable.
2. The novel noise-reducing earphone line control board of claim 1, wherein: the positive microphone adopts a back-electrode microphone with positive output, and the negative microphone adopts a diaphragm microphone with negative output.
3. The novel noise-reducing earphone line control board of claim 1, wherein: the casing includes shell and inner shell, be provided with the pull groove in the shell, the one end sliding connection of inner shell is in the pull groove, place respectively in the inside wall of shell and inner shell positive polarity miaow head microphone and negative polarity miaow head microphone on, the distance between adjustable positive polarity miaow head microphone and the negative polarity miaow head microphone when the relative inner shell of shell slides.
4. A novel noise-reducing earphone line control board as claimed in claim 3, characterized in that: and a signal wire is arranged at one end of the inner shell, which is exposed out of the drawing groove, in the inner shell of the control chip.
5. The novel noise-reducing earphone line control board of claim 1, wherein: the device also comprises a loudspeaker, wherein the loudspeaker is connected with the control chip.
6. The novel noise-reducing earphone line control board of claim 1, wherein: and one end of the positive microphone and one end of the negative microphone are grounded after being connected in series, and the other end of the positive microphone and the negative microphone are connected with the control chip through a resistor.
7. The novel noise-reducing earphone line control board of claim 1, wherein: only one integrated chip is integrated in the control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920932443.2U CN209882018U (en) | 2019-06-18 | 2019-06-18 | Novel noise-reducing earphone line control board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920932443.2U CN209882018U (en) | 2019-06-18 | 2019-06-18 | Novel noise-reducing earphone line control board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209882018U true CN209882018U (en) | 2019-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920932443.2U Active CN209882018U (en) | 2019-06-18 | 2019-06-18 | Novel noise-reducing earphone line control board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209882018U (en) |
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2019
- 2019-06-18 CN CN201920932443.2U patent/CN209882018U/en active Active
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