CN103813227A - Method for improving signal-to-noise ratio of microphone and high signal-to-noise ratio microphone - Google Patents
Method for improving signal-to-noise ratio of microphone and high signal-to-noise ratio microphone Download PDFInfo
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- CN103813227A CN103813227A CN201210449068.9A CN201210449068A CN103813227A CN 103813227 A CN103813227 A CN 103813227A CN 201210449068 A CN201210449068 A CN 201210449068A CN 103813227 A CN103813227 A CN 103813227A
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Abstract
The invention provides a method for improving a signal-to-noise ratio of a microphone and a high signal-to-noise ratio microphone. The method is applied to the microphone. The microphone comprises a casing, a sensor module formed by at least two acoustic sensors and an integrated circuit formed by an adder and a signal amplifier. The method comprises steps that: acoustic signals generated by the acoustic sensors are overlapped; the overlapped acoustic signals are amplified; the amplified acoustic signals are converted into electric signals; the electric signals are converted into sound signals, and the sound signals are converted into sound which is outputted. Through the method for improving the signal-to-noise ratio of the microphone and the high signal-to-noise ratio microphone, the signal-to-noise ratio can be improved, and a noise suppression effect is realized.
Description
Technical field
The present invention relates to microphone denoising control technology field, relate to a kind of method and microphone that improves signal to noise ratio, particularly relate to a kind of method of microphone signal to noise ratio and microphone of high s/n ratio of improving.
Background technology
The raising of social informatization degree can communicate and exchange people anywhere or anytime, and the extensive use very big of various communication equipments and technology has facilitated people's life and improved operating efficiency.But the more serious problem that the development of society brings is exactly noise problem, under noise circumstance, communicate, definition and the intelligibility of communication speech are had a strong impact on, when noise is up to a certain degree time, not only communication cannot be carried out, and noise can bring injury to people's hearing and physical and mental health.So suppress the speech enhancement technique of noise has great significance in modern communications technology.
For the problem that uses microphone under strong noise background, people have adopted several different methods to suppress noise, but still do not reach certain satisfaction.Because traditional microphone is made up of three parts, a sonic transducer, a drive IC, is exactly mechanical cover in addition, so just forms a basic unit that quiets down.A key property signal to noise ratio of microphone is mainly to be contributed by sonic transducer and drive IC, could realize high s/n ratio, but due to the restriction of sonic transducer itself, major part all adopts electret (ECM) and micro mechanical structure (MEMs) to realize high s/n ratio now, is very difficult but these two kinds of structure monomers will reach very high signal to noise ratio.
Therefore, objectively, just need a kind of lifting that can realize signal to noise ratio, suppress the microphone of noise signal.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of method of microphone signal to noise ratio and microphone of high s/n ratio of improving, and cannot realize for solving microphone of the prior art the problem that signal to noise ratio promotes.
For achieving the above object and other relevant objects, the invention provides a kind of method of microphone signal to noise ratio and microphone of high s/n ratio of improving, described method is applied in microphone, described microphone comprises housing and is placed in the sensor assembly that described housing is made up of at least two acoustic sensors and the integrated circuit being made up of adder and signal amplifier, and the method for described raising microphone signal to noise ratio comprises:
The acoustic signal that stack acoustic sensor produces;
Amplify the acoustic signal after stack;
Acoustic signal after amplifying is changed into the signal of telecommunication;
The signal of telecommunication is changed into acoustical signal, and will change into the voice output of acoustical signal.
Preferably, described sensor assembly is positioned over top or the bottom of described housing.
Preferably, described sensor assembly is positioned over described sensor assembly and is positioned over left part or the right part of described housing.
Preferably, described at least two acoustic sensor modules are placed up and down, or parallel placement.
The invention provides a kind of microphone of high s/n ratio, described microphone comprises:
Housing, for placing sensor assembly and integrated circuit;
Sensor assembly, for holding at least two acoustic sensors, and the acoustic signal of induction band noise; Wherein, N is greater than 1 positive integer;
Integrated circuit, connects described sensor assembly, for these acoustic signals that superpose, the acoustic signal after stack is amplified, and changes into the signal of telecommunication, finally the signal of telecommunication is changed into acoustical signal, and outwards output.
Preferably, described acoustic sensor is acoustics sensor diaphragm.
Preferably, described integrated circuit comprises for the signal adder of the acoustic signal that superposes with for amplifying the signal amplifier of the acoustic signal after stack.
Preferably, described at least two acoustic sensors are connected to described signal adder.
Preferably, described sensor assembly is positioned over top or the bottom of described housing.
Preferably, described sensor assembly is positioned over left part or the right part of described housing
As mentioned above, the method for raising microphone signal to noise ratio of the present invention and the microphone of high s/n ratio, can improve signal to noise ratio really, and inhibited to noise.
Accompanying drawing explanation
Fig. 1 is shown as the schematic diagram of the microphone of high s/n ratio of the present invention.
The schematic diagram of the microphone that Fig. 2 is shown as high s/n ratio of the present invention as an example of electret example.
The schematic diagram of the microphone that Fig. 3 is shown as high s/n ratio of the present invention as an example of micro mechanical structure example
Fig. 4 is shown as the method flow diagram of the method for raising microphone signal to noise ratio of the present invention.
Element numbers explanation
1 housing
2 sensor assemblies
3 integrated circuits
21 acoustic sensors
31 adders
32 signal amplifiers
S1 ~ S4 step
Embodiment
Below, by specific instantiation explanation embodiments of the present invention, those skilled in the art can understand other advantages of the present invention and effect easily by the disclosed content of this specification.The present invention can also be implemented or be applied by other different embodiment, and the every details in this specification also can be based on different viewpoints and application, carries out various modifications or change not deviating under spirit of the present invention.
Refer to accompanying drawing.It should be noted that, the diagram providing in the present embodiment only illustrates basic conception of the present invention in a schematic way, satisfy and only show with assembly relevant in the present invention in graphic but not component count, shape and size drafting while implementing according to reality, when its actual enforcement, kenel, quantity and the ratio of each assembly can be a kind of random change, and its assembly layout kenel also may be more complicated.
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail.
The present embodiment provides a kind of microphone of high s/n ratio, the microphone of described high s/n ratio, and as shown in Figure 1, the microphone that can improve signal to noise ratio comprises: housing 1, sensor assembly 2 and integrated circuit 3.Described sensor assembly 2 comprises at least two acoustic sensors 21.Described integrated circuit 3 comprises signal adder 31 and signal amplifier 32.Wherein, housing 1, for placing sensor assembly 2 and integrated circuit 3.Sensor assembly 2, for holding at least two acoustic sensors 21, the acoustic signal of induction band noise, wherein, N is greater than 1 positive integer.Described integrated circuit 3, connect described sensor assembly 2, these acoustic signals are used for superposeing, signal after stack is amplified, change into the signal of telecommunication, finally the signal of telecommunication is changed into acoustical signal, outwards output acoustical signal, that is to say that multiple acoustic sensors 21 are connected on signal adder 31, by signal adder, the acoustic signal on acoustic sensor is stacked up, then described signal adder connects signal amplifier, acoustic signal after stack amplifies by signal amplifier and changes into the signal of telecommunication, the last signal of telecommunication changes into the voice output of outside output to outside.Because these acoustic signals have very strong correlation, the output voltage of described their total acoustic signals is V
out=V
1+ V
2+ ... + V
n.But because the noise signal in acoustic signal does not have correlation, the output voltage of noise signal just can not superpose so, but
for example, increase an acoustic sensor, when sensor assembly 2 comprises two acoustic sensors, the signal to noise ratio of two acoustic sensors will improve 3dB; Increase by two acoustic sensors, when sensor assembly 2 comprises three acoustic sensors, the signal to noise ratio of three acoustic sensors will improve 4.7dB; Increase by three acoustic sensors, sensor assembly 2 comprises four acoustic sensors, and the signal to noise ratio of four acoustic sensors will improve 6dB so, by that analogy, increases more acoustic sensors, and the dB number that signal to noise ratio improves is higher.
If the implementation of the microphone system of this high s/n ratio is take electret (ECM) as example, so as shown in Figure 2, described housing 1 middle and upper part is sensor assembly 2, bottom is integrated circuit 3, and acoustic sensor exists with the form of diaphragm, and described acoustic sensor 21 can adopt up-down structure or parallel construction to place acoustic sensor 21, realizes the object that improves signal to noise ratio.
If the implementation of the microphone system of this high s/n ratio is take micro mechanical structure (MENs) as example, so as shown in Figure 3, in described housing 1, left part is sensor assembly 2, right part is integrated circuit 3, and acoustic sensor 21 exists with the form of diaphragm, described acoustic sensor can adopt up-down structure or parallel construction to place acoustic sensor 21, like this microphone has been become to multimembrane sheet from traditional single diaphragm, to improve microphone signal to noise ratio.
Embodiment bis-
The present embodiment provides a kind of method that improves microphone signal to noise ratio, described method is applied in microphone, described microphone comprises housing and is placed in the sensor assembly that described housing is made up of at least two acoustic sensors and the integrated circuit being made up of adder and signal amplifier, described microphone is as take electret (ECM) as example, so sensor assembly is positioned over to the top of described housing, integrated circuit is positioned over to the bottom of described housing.If take micromechanics mechanism (MENs) as example, this step is exactly that sensor assembly is positioned over to the left part of described housing, integrated circuit is positioned over to the right part of described housing so.Wherein, described at least two acoustic sensor modules can be placed up and down, or parallel placement.As described in Figure 4, the method for described raising microphone signal to noise ratio comprises:
S1, the acoustic signal that stack acoustic sensor produces; That is, the output voltage of the acoustic signal of each acoustic sensor that superposes, that is to say, the output voltage V of total acoustic signal of sensor assembly
out=V
1+ V
2+ ... + V
n, this is due to having property of acoustic signal.But the noise signal in acoustic signal does not but have correlation, therefore, the output voltage of described noise signal is just not stackable, and the output voltage of described noise signal is
S2, amplifies the acoustic signal after stack;
S3, changes into the signal of telecommunication by the acoustic signal after amplifying;
S4, changes into acoustical signal by the signal of telecommunication, and will change into the voice output of acoustical signal.
The method of raising microphone signal to noise ratio of the present invention and the microphone system of high s/n ratio, can effectively improve microphone signal to noise ratio, suppressed noise simultaneously.
In sum, the present invention has effectively overcome various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all can, under spirit of the present invention and category, modify or change above-described embodiment.Therefore, such as in affiliated technical field, have and conventionally know that the knowledgeable, not departing from all equivalence modifications that complete under disclosed spirit and technological thought or changing, must be contained by claim of the present invention.
Claims (10)
1. one kind is improved the method for microphone signal to noise ratio, be applied in microphone, it is characterized in that, described microphone comprises housing and is placed in the sensor assembly that described housing is made up of at least two acoustic sensors and the integrated circuit being made up of adder and signal amplifier, and the method for described raising microphone signal to noise ratio comprises:
The acoustic signal that stack acoustic sensor produces;
Amplify the acoustic signal after stack;
Acoustic signal after amplifying is changed into the signal of telecommunication;
The signal of telecommunication is changed into acoustical signal, and will change into the voice output of acoustical signal.
2. the method for raising microphone signal to noise ratio according to claim 1, is characterized in that: described sensor assembly is positioned over top or the bottom of described housing.
3. the method for raising microphone signal to noise ratio according to claim 1, is characterized in that: described sensor assembly is positioned over described sensor assembly and is positioned over left part or the right part of described housing.
4. the method for raising microphone signal to noise ratio according to claim 1, is characterized in that: described at least two acoustic sensor modules are placed up and down, or parallel placement.
5. a microphone for high s/n ratio, is characterized in that: comprising:
Housing, for placing sensor assembly and integrated circuit;
Sensor assembly, for holding at least two acoustic sensors, and the acoustic signal of induction band noise; Wherein, N is greater than 1 positive integer;
Integrated circuit, connects described sensor assembly, for these acoustic signals that superpose, the acoustic signal after stack is amplified, and changes into the signal of telecommunication, finally the signal of telecommunication is changed into acoustical signal, and outwards output.
6. the microphone of high s/n ratio according to claim 5, is characterized in that: described acoustic sensor is acoustics sensor diaphragm.
7. the microphone of high s/n ratio according to claim 5, is characterized in that: described integrated circuit comprises for the signal adder of the acoustic signal that superposes with for amplifying the signal amplifier of the acoustic signal after stack.
8. the microphone of high s/n ratio according to claim 7, its feature is being, described at least two acoustic sensors are connected to described signal adder.
9. the microphone of high s/n ratio according to claim 5, is characterized in that: described sensor assembly is positioned over top or the bottom of described housing.
10. the microphone of high s/n ratio according to claim 5, is characterized in that, described sensor assembly is positioned over left part or the right part of described housing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210449068.9A CN103813227A (en) | 2012-11-12 | 2012-11-12 | Method for improving signal-to-noise ratio of microphone and high signal-to-noise ratio microphone |
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| CN201210449068.9A CN103813227A (en) | 2012-11-12 | 2012-11-12 | Method for improving signal-to-noise ratio of microphone and high signal-to-noise ratio microphone |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110265056A (en) * | 2019-06-11 | 2019-09-20 | 安克创新科技股份有限公司 | The control method and loudspeaking unit of source of sound |
| CN113055772A (en) * | 2021-02-07 | 2021-06-29 | 厦门亿联网络技术股份有限公司 | Method and device for improving signal-to-noise ratio of microphone signal |
-
2012
- 2012-11-12 CN CN201210449068.9A patent/CN103813227A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110265056A (en) * | 2019-06-11 | 2019-09-20 | 安克创新科技股份有限公司 | The control method and loudspeaking unit of source of sound |
| CN110265056B (en) * | 2019-06-11 | 2021-09-17 | 安克创新科技股份有限公司 | Sound source control method, loudspeaker device and apparatus |
| CN113055772A (en) * | 2021-02-07 | 2021-06-29 | 厦门亿联网络技术股份有限公司 | Method and device for improving signal-to-noise ratio of microphone signal |
| US20220254363A1 (en) * | 2021-02-07 | 2022-08-11 | Yealink (Xiamen) Network Technology Co., Ltd. | Method and apparatus for improving signal-to-noise ratio of microphone signal |
| CN113055772B (en) * | 2021-02-07 | 2023-02-17 | 厦门亿联网络技术股份有限公司 | Method and device for improving signal-to-noise ratio of microphone signal |
| US11798572B2 (en) * | 2021-02-07 | 2023-10-24 | Yealink (Xiamen) Network Technology Co., Ltd. | Method and apparatus for improving signal-to-noise ratio of microphone signal |
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Application publication date: 20140521 |