CN209767776U - Microphone device - Google Patents
Microphone device Download PDFInfo
- Publication number
- CN209767776U CN209767776U CN201921078986.9U CN201921078986U CN209767776U CN 209767776 U CN209767776 U CN 209767776U CN 201921078986 U CN201921078986 U CN 201921078986U CN 209767776 U CN209767776 U CN 209767776U
- Authority
- CN
- China
- Prior art keywords
- microphone
- audio
- signal line
- input signal
- audio input
- 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.)
- Active
Links
Landscapes
- Circuit For Audible Band Transducer (AREA)
Abstract
The utility model discloses a microphone device, which relates to the technical field of electroacoustic products and comprises a device body and a cable assembly, wherein the device body comprises a microphone and a processor for receiving the microphone signal; the cable assembly comprises an audio input signal line, wherein a first end of the audio input signal line is electrically connected with an audio output port of the electronic equipment, a second end of the audio input signal line is electrically connected with an analog input pin of the processor, and the processor inverts the audio input signal transmitted by the audio input signal line and superposes the inverted audio input signal with the microphone signal to obtain an audio output signal. The utility model discloses the technical problem that echo cancellation effect is poor, communication quality is low among the prior art has been solved to the microphone device, the utility model discloses can be under the condition that does not change original audio amplifier structure effectual elimination audio amplifier echo, the commonality is good, and simple structure improves communication quality.
Description
Technical Field
The utility model relates to an electroacoustic product technical field, in particular to microphone device that can eliminate audio amplifier echo.
background
When electronic devices such as computers are used for voice or video communication including voice, two common methods are a headset, a sound reproducing device (a sound box), and a microphone.
When the voice communication is performed in the speaker + microphone mode, the following disadvantages exist:
Firstly, the sound box can be picked up by the microphone and then heard by the other party after playing the sound of the other party, and then the other party can hear own echo if one party uses the sound box to play the sound in communication, if a plurality of people use the sound box to play the sound in communication, the echo can be played by the other sound box and picked up by the microphone, and finally multilayer echo aliasing is heard to influence the communication quality.
Secondly, the microphone needs to be close to the mouth of a person, otherwise, the speaking voice may be mixed with more environmental noise, and the communication quality is affected.
Chinese patent application CN109788399A discloses an echo cancellation method and system for a sound box, which collects audio signals output by the sound box through a microphone array, sends the collected audio signals to a processor module, and inputs the audio signals into a main controller for processing after being processed by the processor, the main controller obtains amplitude values corresponding to the whole frequency range collected by the microphone array, the main controller combines signals of various frequency points to obtain a frequency response curve of the sound box in the current environment, and performs echo cancellation processing on the received audio signals according to the frequency response curve. Although the technical scheme disclosed by the patent can eliminate the echo of the sound box, the structure and the program flow are complex; moreover, a sound box structure needs to be modified so as to increase a microphone array; moreover, audio signals output by the sound box and collected by the microphone are easy to distort, and sound box echoes cannot be well eliminated.
SUMMERY OF THE UTILITY MODEL
To above defect, the utility model aims at providing a microphone device, this microphone device gather high-fidelity's echo cancellation signal under the condition that does not change electronic equipment and sound equipment structure, can effectual elimination sound equipment's echo, the audio signal definition of transmitting for electronic equipment is good, and communication quality is high.
In order to realize the purpose, the technical scheme of the utility model is that:
A microphone device comprises a device body and a cable assembly, wherein the device body comprises a microphone and
A processor for receiving the microphone signal; the cable assembly comprises an audio input signal line, wherein a first end of the audio input signal line is electrically connected with an audio output port of the electronic equipment, a second end of the audio input signal line is electrically connected with an analog input pin of the processor, and the processor inverts an audio input signal transmitted by the audio input signal line and then superposes the inverted audio input signal with the microphone signal to obtain an audio output signal; the cable assembly further comprises a USB signal wire, wherein a first end of the USB signal wire is electrically connected with a USB pin of the processor, a second end of the USB signal wire is electrically connected with a USB interface of the electronic equipment, and the audio output signal is transmitted to the electronic equipment through the USB signal wire. The processor is a DSP chip.
Furthermore, the audio input signal line is also provided with a third end, and the third end is electrically connected with an audio input end of the sound reproduction device.
Further, the USB signal line and the audio input signal line are formed by a multi-core cable.
Furthermore, a low-pass filter circuit is connected in series between the second end of the audio input signal line and the analog input pin of the processor.
Further, the low-pass filter circuit is a resistance-capacitance filter circuit.
Further, the microphone is a microphone array formed by a plurality of single microphones.
Furthermore, the number of the microphone units is two, and the two microphone units are both MEMS microphones.
Furthermore, a second end of the audio input signal line is provided with a first audio interface, and the first audio interface is plugged with an audio output port of the electronic equipment; and a third end of the audio input signal line is provided with a second audio interface, and an audio input end of the sound reproducing device is connected with the second audio interface in an inserting mode.
After the technical scheme is adopted, the beneficial effects of the utility model are that:
because the utility model discloses the microphone device includes device body and cable subassembly, the device body includes microphone and is used for receiving the treater of microphone signal; the cable assembly comprises an audio input signal wire, wherein a first end of the audio input signal wire is electrically connected with an audio output port of the electronic equipment, a second end of the audio input signal wire is electrically connected with an analog input pin of the processor, and the processor performs superposition on an audio input signal transmitted by the audio input signal wire and a microphone signal to obtain an audio output signal; the cable assembly further comprises a USB signal line, and the audio output signal is transmitted to the electronic device through the USB signal line. Compared with the prior art, the utility model have following advantage:
Firstly, an audio signal played by a sound box is directly obtained from an audio output port of the electronic equipment, the obtained audio signal is not distorted and does not have environmental noise, the fidelity of the collected signal is high, the consistency with the signal played by the sound box is high, the echo of the sound box picked by a microphone can be effectively eliminated, and the communication quality is improved;
The original structure of the sound reproducing equipment does not need to be changed, and the sound reproducing equipment is suitable for any sound reproducing equipment and has good universality;
a microphone array for collecting audio signals output by the sound box is not needed, and the microphone array has few used elements, simple structure and low cost;
And fourthly, the processor only needs to invert the audio input signal and then superpose the inverted audio input signal with the microphone signal, and the processing procedure is simple.
Because the microphone is a microphone array formed by a plurality of single microphones, the environmental noise can be effectively eliminated, and the communication quality is further improved.
To sum up, the utility model discloses microphone device has solved among the prior art technical problem that the echo cancellation effect is poor, communication quality is low, the utility model discloses can be under the condition that does not change original audio amplifier structure effectual elimination audio amplifier echo, the commonality is good, and simple structure improves communication quality.
Drawings
Fig. 1 is a schematic structural diagram of a microphone device according to the present invention;
fig. 2 is a block diagram of the microphone device of the present invention;
in the figure: 10. the device comprises a device body, 20, a cable assembly, 21, an audio input signal line, 22, a first audio interface, 24, a second audio interface, 25, a USB interface, 26, a USB signal line, 30, a microphone monomer, 32, a processor, 34 and a low-pass filter circuit.
Detailed Description
The invention is further explained below with reference to the drawings and examples.
all the orientations referred to in the present specification are based on the orientations shown in the drawings, and only represent relative positional relationships, not absolute positional relationships.
as shown in fig. 1, a microphone device includes a device body 10 and a cable assembly 20.
As shown in fig. 2, the apparatus body 10 includes a microphone, a processor 32, and a low-pass filter circuit 34.
as shown in fig. 2, the microphone is a microphone array composed of a plurality of individual microphone units 30. In the present embodiment, it is preferable that the microphone array is a dual-microphone array, that is, two microphone units 30 are provided, and both the two microphone units 30 are MEMS (Micro-Electro-Mechanical System) microphones. The two microphone units 30 are respectively electrically connected to two digital input pins of the processor 32, and the two microphone units 30 convert the collected voice into an electrical signal and transmit the electrical signal to the processor 32. In practical applications, the number of the microphone units 30 is not limited to two, and four or other array methods may also be adopted, and the embodiment is not limited herein.
As shown in fig. 1 and fig. 2, the processor 32 is configured to receive the microphone signals transmitted by the two microphone units 30, and process the received microphone signals, and a blind source separation algorithm is used to effectively suppress environmental noise in the microphone signals, so as to obtain a denoised audio signal. Meanwhile, the processor 32 is further configured to receive an audio input signal transmitted from the audio input signal line 21 of the cable assembly 20, the processor 32 performs an inversion process on the audio input signal to obtain a noise canceling signal, and then superimposes the noise canceling signal and the noise-removed audio signal, so as to cancel an echo of the sound reproducing apparatus, obtain a clear audio output signal for canceling the environmental noise and the echo of the sound reproducing apparatus, and transmit the audio output signal to the electronic apparatus through the USB signal line of the cable assembly 20, which can effectively improve the quality of communication. In the present embodiment, the processor is preferably a DSP chip, and more preferably, the model number of the DSP chip is CX20921, but the present invention is not limited to this chip, and any processing chip capable of processing an audio signal may be used.
As shown in fig. 2, the low pass filter circuit 34 is connected in series between the processor 32 and the audio input signal line 21, that is, one end of the low pass filter circuit 34 is electrically connected to the audio input signal line 21, and the other end is electrically connected to the analog input pin of the processor 32. The low pass filter circuit 34 is used to filter out high frequency signals in the audio input signal. In the present embodiment, the low-pass filter circuit 34 is preferably a resistance-capacitance filter circuit, but is not limited to a resistance-capacitance filter circuit, and any circuit or component may be used as long as it can filter a high-frequency signal.
As shown in fig. 1, the cable assembly 20 includes an audio input signal line 21 and a USB signal line 26.
As shown in fig. 1 and 2 in common, the audio input signal line 21 is provided with three end portions, named a first end, a second end, and a third end, respectively. The first end of the audio input signal line 21 is electrically connected to the audio output port of the electronic device, the second end of the audio input signal line 21 is electrically connected to the low-pass filter circuit 34, that is, the second end of the audio input signal line 21 is electrically connected to the analog input pin of the processor 32 through the low-pass filter circuit 34, and the third end of the audio input signal line 21 is electrically connected to the audio input end of the sound reproducing device. The second end of the audio input signal line 21 is provided with a first audio interface 22, in this embodiment, the first audio interface 22 is preferably a 3.5mm pin, and the first audio interface 22 is electrically connected to an audio output port of the electronic device. The third end of the audio input signal line 21 is provided with a second audio interface 24, in this embodiment, the second audio interface 24 is preferably a 3.5mm female socket, and the audio input end of the sound reproducing device is electrically connected to the second audio interface 24. In practical applications, the first audio interface 22 and the second audio interface 24 are not limited to the 3.5mm pin and the 3.5mm socket in this embodiment, and other types of audio interfaces may be used as long as they can be matched with the ports of the electronic device and the sound reproducing device.
As shown in fig. 1 and fig. 2, the audio input signal output from the audio output port of the electronic device is divided into two paths, one of the two paths is transmitted to the processor 32 through the first end and the second end of the audio input signal line 31 for echo cancellation, and the other path is transmitted to the sound reproducing device through the first end and the third end of the audio input signal line 31 for sound reproduction. The audio input signal line 21 is used for acquiring high-fidelity echo cancellation signals without changing the structures of the electronic equipment and the sound reproducing equipment, the original connection mode is reserved, the audio signal acquisition device is suitable for any electronic equipment and sound reproducing equipment, the application range is wider, and the universality is better.
As shown in fig. 1 and fig. 2, a first end of the USB signal line 26 is electrically connected to a USB pin of the processor 32, and a second end of the USB signal line 26 is electrically connected to a USB port of the electronic device. A second end of the USB signal line 26 is provided with a USB interface 25, and the USB interface 25 is electrically connected to a USB port of the electronic device. The audio output signal is transmitted to the electronic device via the USB signal line 26 and then transmitted to and received by the other party of the communication via the network.
As shown in fig. 1 and fig. 2, the USB signal line 26 and the audio input signal line 21 are formed by a multi-core cable, which is simple in structure and convenient to use, and the phenomenon that a plurality of cables are intertwined does not occur when in use.
The utility model discloses microphone device possesses the function of eliminating ambient noise, eliminating the equipment echo of playing, and simple structure, does not influence the original structure and the original connected mode of electronic equipment and equipment of playing, and the range of application is wider, and the commonality is better.
The nomenclature with ordinal numbers (such as the first audio interface and the second audio interface) referred to in this specification is only for distinguishing technical features, and does not represent the positional relationship, the operation sequence, etc. between the features.
The present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes without creative labor from the above conception, and all the changes fall within the protection scope of the present invention.
Claims (10)
1. The microphone device is characterized by comprising a device body and a cable assembly, wherein the device body comprises a microphone and a processor for receiving a microphone signal; the cable assembly comprises an audio input signal line, wherein a first end of the audio input signal line is electrically connected with an audio output port of the electronic equipment, a second end of the audio input signal line is electrically connected with an analog input pin of the processor, and the processor inverts the audio input signal transmitted by the audio input signal line and superposes the inverted audio input signal with the microphone signal to obtain an audio output signal.
2. The microphone apparatus as defined by claim 1 wherein the audio input signal line is further provided with a third terminal, the third terminal being electrically connected to an audio input of the sound reproducing device.
3. The microphone apparatus as claimed in claim 1, wherein the cable assembly further comprises a USB signal line, a first end of the USB signal line is electrically connected to the USB pin of the processor, and a second end of the USB signal line is electrically connected to the USB interface of the electronic device, so as to transmit the audio output signal to the electronic device.
4. the microphone device as defined by claim 3, wherein the USB signal line and the audio input signal line are constituted by one multi-core cable.
5. The microphone apparatus as claimed in claim 1, wherein a low pass filter circuit is connected in series between the second end of the audio input signal line and the analog input pin of the processor.
6. The microphone device as defined by claim 5, wherein the low-pass filter circuit is a resistance-capacitance filter circuit.
7. The microphone device as claimed in claim 1, wherein the microphone is a microphone array composed of a plurality of single microphones.
8. The microphone device as claimed in claim 7, wherein there are two microphone units, and both of the microphone units are MEMS microphones.
9. The microphone apparatus of claim 1, wherein the processor is a DSP chip.
10. The microphone device as claimed in claim 2, wherein the second end of the audio input signal line is provided with a first audio interface, and the first audio interface is plugged with an audio output port of the electronic equipment; and a third end of the audio input signal line is provided with a second audio interface, and an audio input end of the sound reproducing device is connected with the second audio interface in an inserting mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921078986.9U CN209767776U (en) | 2019-07-11 | 2019-07-11 | Microphone device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921078986.9U CN209767776U (en) | 2019-07-11 | 2019-07-11 | Microphone device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209767776U true CN209767776U (en) | 2019-12-10 |
Family
ID=68746221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921078986.9U Active CN209767776U (en) | 2019-07-11 | 2019-07-11 | Microphone device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209767776U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110289025A (en) * | 2019-07-29 | 2019-09-27 | 东莞市居胜电子有限公司 | A kind of multi-medium video-signal sound system |
-
2019
- 2019-07-11 CN CN201921078986.9U patent/CN209767776U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110289025A (en) * | 2019-07-29 | 2019-09-27 | 东莞市居胜电子有限公司 | A kind of multi-medium video-signal sound system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10643634B2 (en) | Multichannel echo cancellation circuit and method and smart device | |
| US9384726B2 (en) | Feedback microphones encoder modulators, signal generators, mixers, amplifiers, summing nodes | |
| CN103152500B (en) | Method for eliminating echo from multi-party call | |
| CN105263076B (en) | A kind of balanced type earphone and mobile terminal based on USB C plugs | |
| CN106358108B (en) | Compensating filter is fitted system, sound equipment compensation system and method | |
| EP2466914B1 (en) | Speaker array for virtual surround sound rendering | |
| CN112616034A (en) | Integrated audio and video device | |
| CN209767776U (en) | Microphone device | |
| WO2022142833A1 (en) | Signal processing method, device and apparatus | |
| CN2691200Y (en) | Digital speaker | |
| CN207835739U (en) | Active noise reduction system and active noise reduction earphone | |
| CN206237570U (en) | It is a kind of that there are two kinds of noise cancelling headphones of audio access way | |
| CN106060694A (en) | Digital earphone and listened sound processing method thereof | |
| WO2023088139A1 (en) | Audio processing apparatus and terminal device | |
| CN116935873A (en) | Audio system and echo cancellation method | |
| US12047749B2 (en) | Cable | |
| CN212992396U (en) | Echo cancellation circuit, device and video system | |
| CN113645546B (en) | Voice signal processing method and system and audio and video communication equipment | |
| CN207399486U (en) | A kind of microphone device extended by ear microphone jack | |
| TWM450038U (en) | Audio/video apparatus for canceling echo | |
| CN204906663U (en) | Microphone device and sound system | |
| CN110099342A (en) | Telephone transmitter | |
| CN110149571A (en) | A kind of echo cancelling system and removing method for speech ciphering equipment | |
| CN112399305B (en) | Speaker circuit and mobile terminal | |
| CN214355873U (en) | Split type vehicle-mounted multimedia equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |