CN209390369U - A kind of microphone and electronic equipment with echo sound-attenuating system - Google Patents
A kind of microphone and electronic equipment with echo sound-attenuating system Download PDFInfo
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- CN209390369U CN209390369U CN201821717652.7U CN201821717652U CN209390369U CN 209390369 U CN209390369 U CN 209390369U CN 201821717652 U CN201821717652 U CN 201821717652U CN 209390369 U CN209390369 U CN 209390369U
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- microphone
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- loudspeaker
- chip
- acoustic sensor
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Abstract
The utility model discloses a kind of microphone and electronic equipment with echo sound-attenuating system, and microphone includes a microphone acoustic cavity, including: Acoustic sensor, IC chip and loudspeaker are set on the first laminate；Through-hole is set on Acoustic sensor and towards loudspeaker；Second laminate, the second laminate are covered on the upper surface of first laminate, and an acoustics through-hole is arranged on the second laminate.The technical solution of the utility model beneficial effect is: through-hole being arranged on microphone, directly sense the output signal of loudspeaker, to obtain loudspeaker information, and utilize loudspeaker information back to Acoustic sensor, to have the function that eliminate echo, and at low cost, route is simple, while not influencing the acoustical behavior of microphone.
Description
Technical field
The utility model relates to field of communication technology more particularly to a kind of microphones and electronics with echo sound-attenuating system
Equipment.
Background technique
With the development of Technology of Mobile Multimedia, electronic equipment is constantly to miniaturization, integrated trend development.In electroacoustic
In the electronic product in field, microphone is converted to electric signal for acoustical signal.In recent years, microphone is commonly utilized in mobile phone, ear
On the electronic equipments such as machine, laptop, video camera.
In the prior art, the loudspeaker of electronic equipment and microphone are located in same cavity, and wherein loudspeaker is without single
Only back chamber, advantage is that cost is relatively low, small in size, but the problem of causing has, and is located at same back chamber with microphone, by existing
Isolation technology such as silica gel, foam etc. be isolated, traditional elimination echo method is to draw in the input signal of power amplifier to come, right
Microphone is impacted when receiving external voice.
Summary of the invention
For the above-mentioned problems in the prior art, a kind of microphone and electronics with echo sound-attenuating system is now provided
Equipment.
Specific technical solution is as follows:
A kind of microphone with echo cancelling system, the microphone include a microphone acoustic cavity, including:
An Acoustic sensor, a loudspeaker and an IC chip is arranged on first laminate in one first laminate；
One through-hole is set on the Acoustic sensor and towards the loudspeaker；
One second laminate, second laminate are covered on the upper surface of described first laminate, are arranged one on second laminate
Acoustics through-hole.
Preferably, the signal input part of the IC chip is connect with the signal output end of the Acoustic sensor,
The IC chip includes:
One signal output end pin；
One grounding pin.
Preferably, including a power-supply circuit, the input terminal of the power-supply circuit connect the signal output end pin.
It preferably, further include a bias supply, the input terminal of the bias supply connects the output end of the power-supply circuit；
The power end of the Acoustic sensor is connected between the output end of the bias supply and the grounding pin；
The power end of the loudspeaker is connected between the output end of the bias supply and the grounding pin.
Preferably, echo cancelling system includes adaptive noise reduction system.
Preferably, the IC chip includes active noise reduction chip.
Preferably, first laminate is a printed circuit board, and pad is arranged in the bottom of the printed circuit board.
Preferably, the Acoustic sensor is connect with the IC chip lead.
It preferably, further include package casing, it is the Acoustic sensor, the IC chip, the loudspeaker, described
Power-supply circuit and the bias supply are all set in inside the package casing, the signal output end pin and the ground connection
Pin is outside the package casing internal stretch to the package casing.
A kind of electronic equipment, wherein including having the microphone of echo cancelling system described in above-mentioned any one.
The technical solution of the utility model beneficial effect is: through-hole being arranged on microphone, directly senses loudspeaker
Output signal eliminates echo to obtain loudspeaker information, and using loudspeaker information back to Acoustic sensor to reach
Effect, and it is at low cost, and route is simple, while not influencing the acoustical behavior of microphone.
Detailed description of the invention
With reference to appended attached drawing, more fully to describe the embodiments of the present invention.However, appended attached drawing is only used for
Bright and elaboration, does not constitute the limitation to the scope of the utility model.
Fig. 1 is the overall structure diagram about the microphone with echo cancelling system in the utility model；
Fig. 2 is the circuit diagram about the microphone with echo cancelling system in the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are in the premise for not making creative work
Under every other embodiment obtained, fall within the protection scope of the utility model.
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, but not as the utility model
It limits.
The utility model includes a kind of microphone with echo cancelling system, and microphone includes a microphone acoustic cavity
1, wherein include:
An Acoustic sensor 11, an IC chip 12 and a loudspeaking is arranged on first laminate 10 in one first laminate 10
Device 2；
One through-hole 110 is set on Acoustic sensor 11 and towards loudspeaker 2；
One second laminate 13, the second laminate 13 are covered on the upper surface of first laminate 10, an acoustics are arranged on the second laminate 13
Through-hole 130, acoustics through-hole 130 is to capture external acoustic signal.
By the technical solution of the above-mentioned microphone with echo cancelling system, in conjunction with shown in Fig. 1,2, firstly, acoustics sense
It surveys device 11 and loudspeaker 2 to be respectively provided in same cavity in the electronic device, i.e., shared back chamber, Acoustic sensor 11 is to will be outer
The acoustic signal in portion is converted to electric signal, and loudspeaker 2 is to be converted to audio signal for the electric signal of conversion.
Further, through-hole 110 is set on Acoustic sensor 11, and through-hole 110 is towards the position of loudspeaker 2, to sense
The output signal of loudspeaker 2, to obtain 2 information of loudspeaker, and using 2 information back of loudspeaker to Acoustic sensor 11, so
It is handled afterwards by IC chip 12, to constitute an echo cancelling system, has the function that eliminate echo, and at low cost,
Route is simple, while not influencing the acoustical behavior of microphone.
Further, the first laminate 1 and the second laminate 2 constitute a microphone acoustic cavity 1, and the second acoustics through-hole 20 is externally
Setting, so that the inside of microphone acoustic cavity 1 and extraneous connection, are finally sent to the external world for voice signal, so that electronics produces
The sound quality that product receive is more preferable.
In a kind of preferably embodiment, the signal of the signal input part and Acoustic sensor 11 of IC chip 12 is defeated
Outlet 111 connects, and IC chip 12 includes:
One signal output end pin 120；
One grounding pin 121.
Specifically, IC chip 12 is a low cost, and IC chip 12 includes active noise reduction chip, model
It can be AS34XX, IC chip 12 constitutes an echo cancelling system using adaptive noise reduction system, reaches and eliminates echo
Effect, and at low cost, route is simple, while not influencing the acoustical behavior of microphone.
In a kind of preferably embodiment, including a power-supply circuit 3, the input terminal connection signal output end of power-supply circuit 3
Pin 120；
It further include a bias supply 4, the output end of the input terminal connection power-supply circuit 3 of bias supply 4；
The power end 112 of Acoustic sensor 11 is connected between the output end of bias supply 4 and grounding pin 121；
The power end 20 of loudspeaker 2 is connected between the output end of bias supply 4 and grounding pin 121.
Specifically, as shown in Fig. 2, the microphone with echo cancelling system further includes power-supply circuit 3 and bias supply 4,
Power-supply circuit 3 is used to obtain and store from signal output end pin 120 electric energy, and the output end of power-supply circuit 3 is used to export electric energy,
It is powered respectively to IC chip 12, Acoustic sensor 11 and bias supply 4, and power-supply circuit 3 further includes decompression
Unit (not shown in FIG.), pressure unit (not shown in FIG.) is for reducing signal output end pin 120 to power-supply circuit 3
Output end voltage；
Further, the output end of the input terminal connection power-supply circuit 3 of bias supply 4, receives the electricity that power-supply circuit 3 exports
Can and an operating voltage be exported in the output end of bias supply 4, is supplied with exporting a bias voltage to acoustic transducer 1
Electricity.
In a kind of preferably embodiment, echo cancelling system includes adaptive noise reduction system.
Specifically, echo cancelling system includes adaptive noise reduction system, the method that noise is eliminated using digital filter,
It can be realized simultaneously and correct phase error and amplitude mistake.Acoustic sensor 11 senses outside by acoustics through-hole 130 first
Acoustic signal as reference signal, then by through-hole 110 sense loudspeaker 2 output signal, with obtain loudspeaker 2 letter
Breath, sef-adapting filter predict Acoustic sensor 11 by the transfer function of system model using 2 information of current speaker
Then noise is handled by IC chip 12, will be overlapped after prediction noise reverse phase with required audio signal, finally
It is sent to the broadcasting of loudspeaker 2, to have the function that eliminate echo.
In a kind of preferably embodiment, the first laminate 1 is a printed circuit board, and weldering is arranged in the bottom of printed circuit board
Disk；Acoustic sensor 11 is connect with 12 lead of IC chip；It further include package casing 5, Acoustic sensor 11, integrated circuit
Chip 12, loudspeaker 2, power-supply circuit 3 and bias supply 4 are all set in inside package casing 5,120 He of signal output end pin
Grounding pin 121 is outside package casing 5 internal stretch to package casing 5.
The utility model also a kind of electronic equipment, including the above-mentioned microphone with echo cancelling system.
Specifically, loudspeaker 2 and microphone 1 are located in same cavity, i.e., shared to carry on the back chamber, and Acoustic sensor 11 is to will be outer
The acoustic signal in portion is converted to electric signal, and loudspeaker 2 is to be converted to audio signal for the electric signal of conversion, and acoustics senses
Through-hole 110 is set on device 11, and through-hole 110 is towards the position of loudspeaker 2, to sense the output signal of loudspeaker 2, is raised with obtaining
2 information of sound device, and using 2 information back of loudspeaker to Acoustic sensor 11, then handled by an IC chip 12,
To constitute an echo cancelling system, have the function that eliminate echo, and at low cost, route is simple, while not influencing microphone
Acoustical behavior.
It should be noted that electronic equipment portion is confined to mobile or non-moving type electronic equipment, it is no longer superfluous herein
It states.
The technical solution of the utility model beneficial effect is: through-hole being arranged on microphone, directly senses loudspeaker
Output signal eliminates echo to obtain loudspeaker information, and using loudspeaker information back to Acoustic sensor to reach
Effect, and it is at low cost, and route is simple, while not influencing the acoustical behavior of microphone.
The foregoing is merely the utility model preferred embodiment, be not intended to limit the embodiments of the present invention and
Protection scope should can appreciate that all in the utility model specification and diagram to those skilled in the art
Hold made equivalent replacement and obviously change obtained scheme, the protection model of the utility model should all be included in
In enclosing.
Claims (10)
1. a kind of microphone with echo sound-attenuating system, the microphone includes a microphone acoustic cavity, which is characterized in that
Include:
An Acoustic sensor, a loudspeaker and an IC chip is arranged on first laminate in one first laminate；
One through-hole is set on the Acoustic sensor and towards the loudspeaker；
One second laminate, second laminate are covered on the upper surface of described first laminate, an acoustics are arranged on second laminate
Through-hole.
2. the microphone according to claim 1 with echo sound-attenuating system, which is characterized in that the IC chip
Signal input part connect with the signal output end of the Acoustic sensor, the IC chip includes:
One signal output end pin；
One grounding pin.
3. the microphone according to claim 2 with echo sound-attenuating system, which is characterized in that including a power-supply circuit,
The input terminal of the power-supply circuit connects the signal output end pin.
4. the microphone according to claim 3 with echo sound-attenuating system, which is characterized in that further include a biased electrical
Source, the input terminal of the bias supply connect the output end of the power-supply circuit；
The power end of the Acoustic sensor is connected between the output end of the bias supply and the grounding pin；
The power end of the loudspeaker is connected between the output end of the bias supply and the grounding pin.
5. the microphone according to claim 1 with echo sound-attenuating system, which is characterized in that echo sound-attenuating system includes
Adaptive noise reduction system.
6. the microphone according to claim 1 with echo sound-attenuating system, which is characterized in that the IC chip
Including active noise reduction chip.
7. the microphone according to claim 1 with echo sound-attenuating system, which is characterized in that first laminate is one
Pad is arranged in the bottom of printed circuit board, the printed circuit board.
8. the microphone according to claim 2 with echo sound-attenuating system, which is characterized in that the Acoustic sensor with
The IC chip lead connection.
9. the microphone according to claim 4 with echo sound-attenuating system, which is characterized in that it further include package casing,
The Acoustic sensor, the IC chip, the loudspeaker, the power-supply circuit and the bias supply are respectively provided with
Inside the package casing, the signal output end pin and the grounding pin are from the package casing internal stretch to institute
It states outside package casing.
10. a kind of electronic equipment, which is characterized in that including described in the claims 1-9 any one there is echo to eliminate the noise
The microphone of system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821717652.7U CN209390369U (en) | 2018-10-22 | 2018-10-22 | A kind of microphone and electronic equipment with echo sound-attenuating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821717652.7U CN209390369U (en) | 2018-10-22 | 2018-10-22 | A kind of microphone and electronic equipment with echo sound-attenuating system |
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| Publication Number | Publication Date |
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| CN209390369U true CN209390369U (en) | 2019-09-13 |
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| CN201821717652.7U Active CN209390369U (en) | 2018-10-22 | 2018-10-22 | A kind of microphone and electronic equipment with echo sound-attenuating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109348385A (en) * | 2018-10-22 | 2019-02-15 | 钰太芯微电子科技（上海）有限公司 | A kind of microphone and electronic equipment with echo sound-attenuating system |
-
2018
- 2018-10-22 CN CN201821717652.7U patent/CN209390369U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109348385A (en) * | 2018-10-22 | 2019-02-15 | 钰太芯微电子科技（上海）有限公司 | A kind of microphone and electronic equipment with echo sound-attenuating system |
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