CN209517434U - A kind of noise reduction folder neck microphone - Google Patents
A kind of noise reduction folder neck microphone Download PDFInfo
- Publication number
- CN209517434U CN209517434U CN201920780027.5U CN201920780027U CN209517434U CN 209517434 U CN209517434 U CN 209517434U CN 201920780027 U CN201920780027 U CN 201920780027U CN 209517434 U CN209517434 U CN 209517434U
- Authority
- CN
- China
- Prior art keywords
- noise reduction
- microphone
- resistance
- triode
- radio reception
- 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
Abstract
The utility model relates to a kind of noise reductions to press from both sides neck microphone, including for receiving voice signal microphone radio reception head, be used for noise filtering noise reduction process circuit, the noise reduction switch for controlling the noise reduction process circuit, for the output terminal and power supply of output signal, the microphone radio reception head, noise reduction process circuit and output terminal are sequentially connected, the noise reduction switch and the noise reduction process circuit connection.The utility model has decrease of noise functions, can effectively cross noise filtering, guarantee the clarity of voice, and circuit structure is simple, and decrease of noise functions can close, and be suitable for varying environment.
Description
Technical field
The utility model relates to signal processing technology fields, press from both sides neck microphone in particular to a kind of noise reduction.
Background technique
In the occasion for much carrying out audio-video recording using camera or mobile phone, clip-on microphone has played crucial work
With, it can not only pick up the acoustic information of needs, and acoustic information can be transmitted on sound pick-up outfit by audio transmission line,
Many conveniences, either on-the-spot demonstration, film making, personal interview, news interview, special topic are provided for audio-video recording process
Report etc. all becomes essential equipment；However, usually since the ambient sound of audio recording is rich and varied, it is some not
The ambient noise needed is also picked up by microphone and is sent into equipment and records, these ambient sounds produce interference to voice, serious to drop
The clarity of low voice.
Currently on the market there are decrease of noise functions tie clip microphone products, one side circuit structure is complicated, higher cost；Separately
On the one hand the opening and closing that not can control decrease of noise functions, are not able to satisfy use demand in varied situations.
Utility model content
The purpose of this utility model is to provide a kind of noise reductions to press from both sides neck microphone, being capable of effective mistake with decrease of noise functions
Noise filtering guarantees the clarity of voice, and circuit structure is simple, and decrease of noise functions can close, and is suitable for varying environment.
A kind of noise reduction folder neck microphone, including for receiving voice signal microphone radio reception head, be used for noise filtering
Noise reduction process circuit, the noise reduction switch for controlling the noise reduction process circuit, the output terminal for output signal, Yi Ji electricity
Source, the microphone radio reception head, noise reduction process circuit and output terminal are sequentially connected, the noise reduction switch and the noise reduction
Processing circuit connection.
Further, the noise reduction process circuit includes for the high pass filter unit of filtering low signal and for that will believe
Number amplification amplification compensating unit.
Further, the high pass filter unit includes filter capacitor C1, the amplification compensating unit include triode Q1,
Resistance R1 and resistance R2；One end of the filter capacitor C1 is connect with the anode of the microphone radio reception head, the other end and three
The base stage of pole pipe Q1 connects；The resistance R2 is connected between the emitter and ground of triode Q1；One end of the resistance R1 is set
Between filter capacitor C1 and the base stage of triode Q1, the other end is connect with the collector of triode Q1.
Further, the power supply is independent current source, and the emitter of the triode Q1 is connect with output terminal, described three
The collector of pole pipe Q1 is connect with independent current source；The noise reduction switch is in parallel with the filter capacitor C1.
Further, power supply biasing resistor R5 is equipped between the microphone radio reception head and power supply.
Further, electrical power by-pass capacitor C3 and electrical power by-pass capacitor C4 is equipped between the power supply and ground.
Further, the power supply is phantom power, provides bias voltage by output terminal to power, the mirage is electric
The split circuit with the noise reduction process circuit in parallel is equipped between source and the anode of microphone radio reception head.
Further, the split circuit includes resistance R3, biasing resistor R4 and capacitor C2, and the noise reduction switch includes the
One noise reduction switch and the second noise reduction switch；First noise reduction switch, biasing resistor R4, resistance R3 and the second noise reduction switch
It is sequentially connected in series between the anode and phantom power of microphone radio reception head；One end of the capacitor C2 is set to biasing resistor R4 and electricity
It hinders between R3, other end ground connection；The collector of the triode Q1 is connected between resistance R3 and the second noise reduction switch.
Compared with prior art, the utility model has the beneficial effects that by setting noise reduction process circuit, elimination is not needed
Ambient noise, realize microphone denoising cash register, improve sound articulation, and the structure of circuit is simple, and cost of implementation is low.Noise reduction
The starting and closing of switch controls decrease of noise functions, to meet the use demand of varying environment.Independent current source can be used in circuit
The MIC interface power supply of phantom power such as mobile phone, camera also can be used, to improve the applicability of product in power supply.
Detailed description of the invention
Fig. 1 is the functional block diagram of the first embodiment of the noise reduction folder neck microphone of the utility model.
Fig. 2 is the circuit diagram of the first embodiment of the noise reduction folder neck microphone of the utility model.
Fig. 3 is the functional block diagram of the second embodiment of the noise reduction folder neck microphone of the utility model.
Fig. 4 is the circuit diagram of the second embodiment of the noise reduction folder neck microphone of the utility model.
Specific embodiment
The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model,
It states.The better embodiment of the utility model is given in attached drawing.But the utility model can come in many different forms
It realizes, however it is not limited to embodiments described herein.
As shown in Figure 1, mainly including microphone radio reception head 1, noise reduction process circuit in the first embodiment of the utility model
2, noise reduction switch 3, output terminal 4 and power supply 5.Wherein, power supply 5 uses independent current source, such as battery or external power supply.Mike
Wind radio reception head 1, noise reduction process circuit 2 and output terminal 4 are sequentially connected, and microphone radio reception head 1 is used to collect voice signal,
Voice signal is transmitted to output terminal 4 after 2 noise reduction of noise reduction process circuit, and is exported by output terminal 4.Noise reduction process circuit
2 include high pass filter unit 21 and amplification compensating unit 22, and high pass filter unit 21 is used for filtering low signal, and amplification compensation is single
Member 22 is for amplifying signal.Noise reduction switch 3 is connect with noise reduction process circuit 2, and noise reduction switch 3 can control noise reduction process electric
The connection and disconnection on road 2.Power supply 5 is connect with microphone radio reception head 1 and noise reduction process circuit 2, to power to circuit.
Referring to FIG. 2, the physical circuit figure of first embodiment, high pass filter unit 21 includes filter capacitor C1, and amplification is mended
Repaying unit 22 includes triode Q1, resistance R1 and resistance R2.One end of filter capacitor C1 passes through capacitor C2 and microphone radio reception
The anode connection of head MIC, the other end are connect with the base stage of triode Q1；Resistance R2 is connected on the emitter and ground of triode Q1
Between；One end of resistance R1 is set between filter capacitor C1 and the base stage of triode Q1, and the collector of the other end and triode Q1 connect
It connects.The emitter of triode Q1 is connect with output terminal 4, and the collector of triode Q1 is connect with independent current source VCC；Noise reduction switch
S1 is in parallel with filter capacitor C1.Power supply biasing resistor R5 is equipped between microphone radio reception head MIC and power supply VCC, for adjusting wheat
The supply voltage of gram wind radio reception head MIC.It is equipped with electrical power by-pass capacitor C3 and electrical power by-pass capacitor C4 between power supply VCC and ground, uses
In the high frequency spurs of removal power supply.
When needing noise reduction, noise reduction switch S1 is disconnected, microphone radio reception head MIC picks up voice signal and is converted to electric signal
Afterwards, it by capacitor C5, is filtered, 200HZ low-frequency noise signal below is filtered, after noise reduction using filter capacitor C1
Signal passes through to be amplified by the amplification compensation circuit 22 that triode Q1, resistance R1 and resistance R2 are formed, then by output terminal
4 outputs.
When not needing noise reduction, directly by amplifying after closure noise reduction switch S1, microphone radio reception head MIC pickup voice signal
Compensation circuit 22 exports after amplifying.
Referring to FIG. 3, mainly including microphone radio reception head 1, noise reduction process circuit in the second embodiment of the utility model
2, noise reduction switch 3, output terminal 4, split circuit 6 and power supply 5.Wherein, power supply 5 uses phantom power, such as mobile phone or camera
The MIC interface of equal electronic equipments, with 4 common port of output terminal.Microphone radio reception head 1, noise reduction process circuit 2 and defeated
Terminal 4 is sequentially connected out, and microphone radio reception head 1 is for collecting voice signal, and voice signal is after 2 noise reduction of noise reduction process circuit
It is transmitted to output terminal 4, and is exported by output terminal 4.Noise reduction process circuit 2 includes that high pass filter unit 21 and amplification compensation are single
Member 22, high pass filter unit 21 are used for filtering low signal, and amplification compensating unit 22 is for amplifying signal.Noise reduction switch
3 connect with noise reduction process circuit 2 and split circuit 6, and noise reduction switch 3 can control the connection and disconnection of noise reduction process circuit 2.Separation
Circuit 6 is set between power supply 5 and microphone radio reception head 1 and in parallel with noise reduction process circuit 2.
Referring to FIG. 4, the physical circuit figure of second embodiment, high pass filter unit 21 includes filter capacitor C1, and amplification is mended
Repaying unit 22 includes triode Q1, resistance R1 and resistance R2.One end of filter capacitor C1 passes through capacitor C2 and microphone radio reception
The anode connection of head MIC, the other end are connect with the base stage of triode Q1；Resistance R2 is connected on the emitter and ground of triode Q1
Between；One end of resistance R1 is set between filter capacitor C1 and the base stage of triode Q1, and the collector of the other end and triode Q1 connect
It connects.Split circuit 6 includes resistance R3, biasing resistor R4 and capacitor C2, and noise reduction switch includes the drop of the first noise reduction switch SW1 and second
Make an uproar switch SW2, and the first noise reduction switch SW1, biasing resistor R4, resistance R3 and the second noise reduction switch SW2 are sequentially connected in series in Mike
Between the anode and phantom power VCC of wind radio reception head MIC.One end of capacitor C2 is set between biasing resistor R4 and resistance R3, separately
One end ground connection.The collector of triode Q1 is connected between resistance R3 and the second noise reduction switch SW2.
When needing noise reduction, the first noise reduction switch SW1 and the second noise reduction switch SW2 are connected downwards, microphone radio reception head
MIC picks up voice signal and after being converted to electric signal, via high pass filter unit 21 by 200HZ low-frequency noise signal mistake below
Filter, then by being exported after 22 amplified signal of amplification compensating unit.Meanwhile point being made of resistance R3, biasing resistor R4 and capacitor C2
The mirage bias supply VCC of mobile phone or camera is separately separated out from circuit 6 and provides biasing to MIC.
When not needing noise reduction, the first noise reduction switch SW1 and the second noise reduction switch SW2 are connected upwards, microphone radio reception
Head MIC is directly connected to output terminal 5, realizes primary sound output.
Although the description combination embodiments above to the utility model carries out, it is familiar with the art
Personnel can carry out based on the above contents it is many replacement, modifications and variations be obvious.Therefore, all such to replace
Generation, improvements and changes are included in the spirit and scope of appended claims.
Claims (8)
1. a kind of noise reduction folder neck microphone, which is characterized in that including for receiving voice signal microphone radio reception head, be used for
The noise reduction process circuit of noise filtering, the noise reduction switch for controlling the noise reduction process circuit, for the output end of output signal
Son and power supply, the microphone radio reception head, noise reduction process circuit and output terminal be sequentially connected, the noise reduction switch with
The noise reduction process circuit connection.
2. noise reduction folder neck microphone according to claim 1, which is characterized in that the noise reduction process circuit includes being used for
Filter the high pass filter unit of low frequency signal and the amplification compensating unit for amplifying signal.
3. noise reduction folder neck microphone according to claim 2, which is characterized in that the high pass filter unit includes filtered electrical
Hold C1, the amplification compensating unit includes triode Q1, resistance R1 and resistance R2；One end of the filter capacitor C1 and institute
The anode connection of microphone radio reception head is stated, the other end is connect with the base stage of triode Q1；The resistance R2 is connected on triode Q1
Emitter and ground between；One end of the resistance R1 be set between filter capacitor C1 and the base stage of triode Q1, the other end with
The collector of triode Q1 connects.
4. noise reduction according to claim 3 folder neck microphone, which is characterized in that the power supply is independent current source, described three
The emitter of pole pipe Q1 is connect with output terminal, and the collector of the triode Q1 is connect with independent current source；The noise reduction switch
It is in parallel with the filter capacitor C1.
5. noise reduction folder neck microphone according to claim 4, which is characterized in that between the microphone radio reception head and power supply
Equipped with power supply biasing resistor R5.
6. noise reduction folder neck microphone according to claim 4, which is characterized in that be equipped with by power supply between the power supply and ground
Road capacitor C3 and electrical power by-pass capacitor C4.
7. noise reduction folder neck microphone according to claim 3, which is characterized in that the power supply is phantom power, by defeated
Out terminal provide bias voltage to power, between the phantom power and the anode of microphone radio reception head be equipped with at the noise reduction
Manage the split circuit of circuit in parallel.
8. noise reduction according to claim 7 folder neck microphone, which is characterized in that the split circuit includes resistance R3, partially
Resistance R4 and capacitor C2 are set, the noise reduction switch includes the first noise reduction switch and the second noise reduction switch；First noise reduction switch,
Biasing resistor R4, resistance R3 and the second noise reduction switch are sequentially connected in series between the anode and phantom power of microphone radio reception head；
One end of the capacitor C2 is set between biasing resistor R4 and resistance R3, other end ground connection；The collector of the triode Q1 connects
It connects between resistance R3 and the second noise reduction switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920780027.5U CN209517434U (en) | 2019-05-28 | 2019-05-28 | A kind of noise reduction folder neck microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920780027.5U CN209517434U (en) | 2019-05-28 | 2019-05-28 | A kind of noise reduction folder neck microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209517434U true CN209517434U (en) | 2019-10-18 |
Family
ID=68189293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920780027.5U Active CN209517434U (en) | 2019-05-28 | 2019-05-28 | A kind of noise reduction folder neck microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209517434U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112423178A (en) * | 2020-10-22 | 2021-02-26 | 国网浙江省电力有限公司双创中心 | Communication device for live working process of ultra-high voltage transmission line |
-
2019
- 2019-05-28 CN CN201920780027.5U patent/CN209517434U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112423178A (en) * | 2020-10-22 | 2021-02-26 | 国网浙江省电力有限公司双创中心 | Communication device for live working process of ultra-high voltage transmission line |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101534467B (en) | Condenser microphone | |
| CN111385716A (en) | Self-adaptive pickup all-in-one machine control system | |
| CN101170325A (en) | Bluetooth wireless microphone | |
| CN209517434U (en) | A kind of noise reduction folder neck microphone | |
| CN106373603A (en) | Device and method for controlling recording according to sound volume | |
| CN204316741U (en) | A kind of automatic calibration noise reduction pickup | |
| CN204206429U (en) | Audio signal processing | |
| CN201134803Y (en) | Bluetooth wireless microphone | |
| CN208015983U (en) | A kind of low distortion audio frequency broadcast system | |
| CN202059574U (en) | High sensitivity sound detector prepared by operational amplifiers | |
| CN108010543B (en) | Voltage following low-distortion audio playing system | |
| CN107948866B (en) | Feedback interference low-distortion audio playing system | |
| CN208402103U (en) | A kind of feedback interference low distortion audio frequency broadcast system | |
| CN205039780U (en) | Take dual power supply's dual track audio power amplifier circuit | |
| CN204948330U (en) | Speaker circuit and mobile terminal | |
| CN203015094U (en) | Audio frequency amplification circuit | |
| CN210274436U (en) | Audio processing circuit and conference microphone | |
| CN218888671U (en) | Simulation silicon wheat | |
| CN220043648U (en) | Audio signal amplifying circuit | |
| CN220606050U (en) | Headset circuit and earphone device | |
| CN217957296U (en) | Circuit for realizing internal recording of system sound | |
| CN212696062U (en) | Intelligent law enforcement instrument device | |
| CN212785812U (en) | Audio automatic switching circuit with double audio input, double audio acquisition and double audio output | |
| CN208691538U (en) | A kind of network sound | |
| CN2119053U (en) | Sound controller for microphone and earphone of intercom |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |