CN217037404U - Two frequency-dividing microphone - Google Patents
Two frequency-dividing microphone Download PDFInfo
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- CN217037404U CN217037404U CN202220712652.8U CN202220712652U CN217037404U CN 217037404 U CN217037404 U CN 217037404U CN 202220712652 U CN202220712652 U CN 202220712652U CN 217037404 U CN217037404 U CN 217037404U
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Abstract
The utility model relates to a dichotomous frequency microphone, comprising: the low-frequency radio module comprises a low-frequency microphone set, a first amplifying circuit, a low-frequency enhancing circuit and a low-pass filter circuit which are connected in sequence; the high-frequency radio module comprises a high-frequency microphone set, a second amplifying circuit, a high-frequency enhancing circuit and a high-pass filter circuit which are connected in sequence; the output end of the low-frequency radio module is connected with a third pin of the pesticide head, the output end of the high-frequency radio module is connected with a second pin of the pesticide head, and the phases of the second pin and the third pin are opposite. The utility model has the characteristics of wider frequency response, more accurate sound pickup and stronger sound stereoscopic impression.
Description
Technical Field
The utility model relates to the technical field of microphones, in particular to a two-frequency-division microphone.
Background
Traditional microphone adopts single mark to receive sound usually, and received audio frequency needs carry out the frequency division through rear end equipment, with low frequency and high frequency sound signal separation, and the rethread is respectively through low frequency loudspeaker and high frequency loudspeaker output to the third dimension and the space of analog sound feel. On one hand, the radio receiving mode needs to be configured with back-end equipment, so that the cost is increased; on the other hand, when sound is received, the high frequency and the low frequency of the sound are mixed, so that the separated sound can only imitate the spatial sense of the original sound to a certain extent, and the original stereo sound is difficult to restore without distortion.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a two-frequency-division microphone which has the characteristics of wider frequency response, more accurate sound pickup and stronger sound stereoscopic impression.
A dichotomous microphone comprising: the low-frequency radio module comprises a low-frequency microphone set, a first amplifying circuit, a low-frequency enhancing circuit and a low-pass filter circuit which are connected in sequence; the high-frequency radio module comprises a high-frequency microphone set, a second amplifying circuit, a high-frequency enhancing circuit and a high-pass filter circuit which are sequentially connected; and the output end of the low-frequency radio module is connected with the third pin of the agricultural head, the output end of the high-frequency radio module is connected with the second pin of the agricultural head, and the phases of the second pin and the third pin are opposite.
In some embodiments, the low frequency microphone set includes at least one low frequency directional microphone and at least one high frequency directional microphone.
In some embodiments, the low frequency directional microphone and the high frequency directional microphone are electret microphones or condenser microphones.
In some embodiments, the high frequency microphone set includes at least one mid frequency directional microphone and at least one high frequency directional microphone.
In some embodiments, the mid-frequency directional microphone and the high-frequency directional microphone are electret microphones or condenser microphones.
In some embodiments, the first amplifying circuit comprises a first transistor, a base of the first transistor is connected to the low frequency microphone set, an emitter of the first transistor is grounded, and a collector of the first transistor is connected to the low frequency boost circuit.
In some embodiments, the low frequency boost circuit includes a first capacitor having a cathode connected to a collector of the first transistor.
In some embodiments, the second amplifying circuit includes a second transistor, a base of the second transistor is connected to the high frequency microphone set, an emitter of the second transistor is grounded, and a collector of the second transistor is connected to the high frequency boost circuit.
In some embodiments, the high frequency boost circuit includes a second capacitor having a cathode connected to a collector of the second transistor.
In some embodiments, the low frequency radio module and the high frequency radio module are powered by a phantom power supply of the cartooning head.
Compared with the prior art, the utility model has the beneficial effects that:
1. be equipped with low frequency radio module and high frequency radio module, can pertinence ground respectively to the low frequency signal in the sound and high frequency signal pick up to guarantee the definition and the truth of sound.
2. The picked low-frequency signal and the high-frequency signal are amplified, enhanced and filtered respectively, so that the definition of the low-frequency signal and the definition of the high-frequency signal are further improved, and the sound is full.
3. The low-frequency signal and the high-frequency signal are output through a third pin and a second pin of the agricultural clamping head respectively, the phases of the third pin and the second pin are opposite, and during output, overlapped frequency bands in the low-frequency signal and the high-frequency signal generate phase cancellation, so that a straighter frequency response curve and lower bottom noise are obtained, and the stereoscopic impression and the space impression of output sound are improved.
4. The low-frequency microphone group and the high-frequency microphone group both use at least two microphones with audio directivity, so that the sound pickup is more accurate.
Drawings
Fig. 1 is a schematic block diagram of a two-frequency-division microphone according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a two-frequency-division microphone according to an embodiment of the present invention.
Detailed Description
To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
As shown in fig. 1 and fig. 2, in a preferred embodiment, the two-frequency-division microphone of the present invention mainly includes a low-frequency sound receiving module 1, a high-frequency sound receiving module 2, and a tuner head 3. The low-frequency radio module 1 and the high-frequency radio module 2 are respectively used for receiving low-frequency signals and high-frequency signals in sound.
Specifically, the low frequency sound receiving module 1 includes a low frequency microphone set 11, a first amplifying circuit 12, a low frequency enhancing circuit 13, and a low pass filter circuit 14, which are connected in sequence. The low-frequency microphone set 11 is used for picking up a low-frequency signal of a natural sound, the first amplifying circuit 12 is used for amplifying the received low-frequency signal, the low-frequency enhancing circuit 13 is used for enhancing the amplified low-frequency signal, and the low-pass filtering circuit 14 is used for filtering a high-frequency signal possibly included in the low-frequency signal.
In the present embodiment, the low frequency microphone set 11 includes at least one low frequency directional microphone and at least one high frequency directional microphone, and the low frequency directional microphone and the high frequency directional microphone cooperate to effectively receive the low frequency signal in the sound and preliminarily filter the high frequency signal.
The high-frequency sound receiving module 2 comprises a high-frequency microphone group 21, a second amplifying circuit 22, a high-frequency enhancing circuit 23 and a high-pass filter circuit 24 which are sequentially connected with the high-frequency sound receiving module 2. The high-frequency microphone set 21 is used for picking up high-frequency signals of natural sounds, the second amplifying circuit 22 is used for amplifying the received high-frequency signals, the high-frequency enhancing circuit 23 is used for enhancing the amplified high-frequency signals, and the high-pass filtering circuit 24 is used for filtering low-frequency signals possibly mixed in the high-frequency signals.
In the present embodiment, the high frequency microphone set 21 includes at least one intermediate frequency directional microphone and at least one high frequency directional microphone, and the high frequency directional microphone and the intermediate frequency directional microphone cooperate with each other, so as to effectively receive high frequency and intermediate frequency signals in sound and preliminarily filter low frequency signals.
It should be noted that, in the above embodiments, the low-frequency directional microphone, the medium-frequency directional microphone, and the high-frequency directional microphone are electret microphones or condenser microphones, which may be conventional microphones, and are not described herein again.
The low frequency radio module 1 and the high frequency radio module 2 are independent of each other, and the output and the kaong head 3 of both are connected, and are specific, and the output of low frequency radio module 1 is connected with the third pin of kaong head 3, and the output of high frequency radio module 2 is connected with the second pin of kaong head 3, and the phase place of second pin and third pin is opposite. It should be noted that the CANNON head 3 (CANNON) is an audio interface head, and the CANNON head is divided into two-core, three-core, four-core, and so on, in this embodiment, it is preferable to adopt a three-core CANNON head 3, which includes a third pin, a second pin, and a third pin, wherein phases of the third pin and the second pin are opposite. In some embodiments, the pesticide head 3 may adopt two cores, four cores or other types, and only the low frequency radio module 1 and the high frequency radio module 2 need to be connected to two pins with opposite phases respectively.
In order to better understand the above two-frequency-division microphone, the following technical solutions are described in conjunction with the circuit diagrams of specific embodiments:
referring to fig. 2, a schematic circuit diagram of a specific embodiment of a two-frequency division microphone of the present application mainly includes a low frequency receiving module 1, a high frequency receiving module 2, and a tuner head 3.
The low-frequency microphone set 11 of the low-frequency sound receiving module 1 includes a microphone MK1 and a microphone MK2, and the microphone MK1 and the microphone MK2 are respectively a low-frequency directional microphone and a high-frequency directional microphone, and are connected in series. The first amplifying circuit 12 includes a first transistor Q1, the positive electrode of the microphone MK1 is connected to the base of the first transistor Q1 through a capacitor C1 and a capacitor C4, the emitter of the first transistor Q1 is grounded, and the collector is connected to the low frequency boost circuit 13. The low-frequency signals collected by the microphone MK1 and the microphone MK2 are amplified by the first transistor Q1. It should be noted that the capacitance C1 is preferably 1-100uF, and the capacitance C4 is preferably 1-100nF, so as to ensure the filtering effect of the low-frequency signal.
The low frequency enhancement circuit 13 includes a first capacitor C5, preferably a first capacitor C5 of 1-100nF, and the negative terminal of the first capacitor C5 is connected to the collector of the first transistor Q1. The low frequency signal amplified by the first transistor Q1 is boosted by the first capacitor C5. The enhanced low-frequency signal is filtered by the low-pass filter circuit 14 composed of the resistor R4, the capacitor C6, the capacitor C2 and the resistor R5, and then is output through the third pin of the karman head P1. Note that, the third pin, i.e., the negative electrode pin, of the pesticide head P1.
The high frequency microphone group 21 of the high frequency sound receiving module 2 comprises a microphone MK3 and a microphone MK4, and the microphone MK3 and the microphone MK4 are respectively a high frequency directional microphone and a medium frequency directional microphone, and the two microphones are connected in series. The second amplifying circuit 22 includes a second transistor Q2, the positive electrode of the microphone MK3 is connected to the base of the second transistor Q2 through a capacitor C3 and a capacitor C7, the emitter of the second transistor Q2 is grounded, and the collector is connected to the high-frequency boost circuit 23. The high-frequency signals collected by the microphone MK3 and the microphone MK4 are amplified by the second transistor Q2. It should be noted that the capacitor C3 is preferably 1 to 100uF, and the capacitor C7 is preferably 1 to 100nF, so as to ensure the filtering effect of the high-frequency signal.
The high frequency enhancement circuit 23 includes a second capacitor C8, preferably a second capacitor C8 of 1-100nF, and the negative terminal of the second capacitor C8 is connected to the collector of the second transistor Q2. The high frequency signal amplified via the second transistor Q2 is boosted by the second capacitor C8. The enhanced high-frequency signal is filtered by a high-pass filter circuit 24 composed of a resistor R9 and a capacitor C9, and then is output through a second pin of the karman head P1. Note that, the second pin, i.e., the positive electrode pin, of the pesticide head P1.
In this embodiment, the low frequency radio module 1 and the high frequency radio module 2 are powered by the phantom power supply of the karman head 3, and the power supply voltage is 12V-48V, so that the circuit can be used without an external power supply.
The utility model is provided with the low-frequency radio module and the high-frequency radio module, and can respectively pick up the low-frequency signal and the high-frequency signal in the sound in a targeted manner, thereby ensuring the definition and the reality of the sound. The picked low-frequency signal and the high-frequency signal are amplified, enhanced and filtered respectively, so that the definition of the low-frequency signal and the definition of the high-frequency signal are further improved, and the sound is full. The low-frequency signal and the high-frequency signal are output through a third pin and a second pin of the agricultural clamping head respectively, the phases of the third pin and the second pin are opposite, and during output, overlapped frequency bands in the low-frequency signal and the high-frequency signal generate phase cancellation, so that a straighter frequency response curve and lower bottom noise are obtained, and the stereoscopic impression and the space impression of output sound are improved.
In the description of the present invention, it is to be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, which indicate orientations or positional relationships, are used based on the orientations or positional relationships shown in the drawings only for the convenience of describing the present invention and for the simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
While the utility model has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.
Claims (10)
1. A divide-by-two microphone, comprising:
the low-frequency radio module comprises a low-frequency microphone set, a first amplifying circuit, a low-frequency enhancing circuit and a low-pass filter circuit which are connected in sequence;
the high-frequency radio module comprises a high-frequency microphone set, a second amplifying circuit, a high-frequency enhancing circuit and a high-pass filter circuit which are connected in sequence; and
the output end of the low-frequency radio module is connected with a third pin of the pesticide head, the output end of the high-frequency radio module is connected with a second pin of the pesticide head, and the phases of the second pin and the third pin are opposite.
2. The dichotomous microphone of claim 1 wherein the group of low frequency microphones comprises at least one low frequency directional microphone and at least one high frequency directional microphone.
3. The crossover microphone of claim 2, wherein the low frequency directional microphone and the high frequency directional microphone are electret microphones or condenser microphones.
4. The divide-by-two microphone of claim 1, wherein the high frequency microphone bank comprises at least one mid frequency directional microphone and at least one high frequency directional microphone.
5. The crossover microphone of claim 4, wherein the mid-frequency directional microphone and the high-frequency directional microphone are electret microphones or condenser microphones.
6. The divide-by-two microphone of claim 1, wherein the first amplification circuit comprises a first transistor having a base connected to the low frequency microphone set, an emitter connected to ground, and a collector connected to the low frequency boost circuit.
7. The divide-by-two microphone of claim 6, wherein the low frequency boost circuit comprises a first capacitor, a cathode of the first capacitor being connected to a collector of the first triode.
8. The divide-by-two microphone of claim 1, wherein the second amplification circuit comprises a second transistor having a base connected to the high frequency microphone set, an emitter connected to ground, and a collector connected to the high frequency boost circuit.
9. The divide-by-two microphone of claim 8, wherein the high frequency boost circuit comprises a second capacitor, a cathode of the second capacitor being connected to a collector of the second transistor.
10. The divide-by-two microphone of claim 1, wherein the low frequency radio module and the high frequency radio module are powered by a phantom power supply of the karaoke head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220712652.8U CN217037404U (en) | 2022-03-30 | 2022-03-30 | Two frequency-dividing microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220712652.8U CN217037404U (en) | 2022-03-30 | 2022-03-30 | Two frequency-dividing microphone |
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| Publication Number | Publication Date |
|---|---|
| CN217037404U true CN217037404U (en) | 2022-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220712652.8U Active CN217037404U (en) | 2022-03-30 | 2022-03-30 | Two frequency-dividing microphone |
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| CN (1) | CN217037404U (en) |
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Effective date of registration: 20230619 Address after: Floor 1, House 47, Huayuan Upper Road, Wangjiang Shangliao Village, Huicheng District, Huizhou, Guangdong Province, 516000 (residence declaration) Patentee after: Huizhou Duolaimi Technology Co.,Ltd. Address before: 518000 14366, building 3, Xunmei science and Technology Plaza, No. 8, Keyuan Road, science and Technology Park community, Yuehai street, Nanshan District, Shenzhen, Guangdong Province Patentee before: Shenzhen jinruitong technology consulting enterprise |