CN206851015U - Can be according to the speaker system of environment automatic regulating volume - Google Patents
Can be according to the speaker system of environment automatic regulating volume Download PDFInfo
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- CN206851015U CN206851015U CN201720680594.4U CN201720680594U CN206851015U CN 206851015 U CN206851015 U CN 206851015U CN 201720680594 U CN201720680594 U CN 201720680594U CN 206851015 U CN206851015 U CN 206851015U
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- human voice
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Abstract
The utility model discloses it is a kind of can according to the speaker system of environment automatic regulating volume, including for collect the microphone receiving module of human voice signal and environmental noise, the filter circuit module for separating human voice signal and environmental noise, the gain amplifier module for amplifying human voice signal's gain, the adder circuit being added for the output to gain amplifier module, for judging noise signal size and controlling the single-chip microcomputer of gain amplifier module, for carrying out anti-phase inverter circuit, the output microphone for exporting human voice signal to adder circuit output.Speaker system of the present utility model, which using microphone collects environmental noise and reaches single-chip microcomputer, is calculated gain amplifier size come intelligent control target sound.And accomplished change volume gain in the case where not changing circuit parameter using the characteristic circuit of the electronic components such as amplifier, and on the basis of intelligent control, while there is provided control option manually to meet the needs of user.
Description
Technical field
Automatic control system and control method are the utility model is related to, can be automatically adjusted more particularly to one kind according to environment
The speaker system of volume.
Background technology
In the present age of lazyboot's equipment ever more popular, automation, intellectuality are enjoyed and pursued.Now in some activities often
To use and arrive loudspeaker, although with the continuous improvement of technical merit, from former moving-coil type, Electret Condencer Microphone, then after arriving
The crystal formula come, carbon granule formula, aluminium band type microphone, the quality of micro-phone transducer also undoubtedly becomes better and better.
But common microphone often has significant limitation in use, present most of loudspeakers are all
Fixed volume can only be expanded to, and the sound of people and environment changes at any time in daily life, so mixing up before
Volume may be influenceed by environmental noise at lower a moment, user needs constantly to adjust gain amplifier, has in actual applications
Inconvenience.
Utility model content
Purpose of utility model：To solve the deficiencies in the prior art, the utility model offer is a kind of can be according to the back of the body of environment
The speaker system of scape decibel automatic regulating volume.
Technical scheme：Can be according to the speaker system of environment automatic regulating volume, including for collecting human voice signal and ring
The microphone receiving module of border noise, the filter circuit module for separating human voice signal and environmental noise, for amplifying voice
The gain amplifier module of signal gain, for judge noise signal size and control gain amplifier module single-chip microcomputer, for pair
Adder circuit that the output of gain amplifier module is added, for adder circuit output is carried out anti-phase inverter circuit with
And for exporting the output microphone of human voice signal.
The microphone receiving module is connected in series with filter circuit module, and the filter circuit module includes being connected in parallel
Band-pass circuit and high low pass parallel circuit, the gain amplifier module include the triode ON circuit that is connected in parallel of N roads.
The colelctor electrode for the triode ON circuit that the band-pass circuit output is connected in parallel with N roads is connected, and N roads are connected in parallel
The emitter stage of triode ON circuit pass through the negative input end of series resistance and adder circuit and connect, adder electricity
The output end on road and the negative input end of inverter circuit connect, input phase of the inverter circuit output with exporting microphone
Even.
The input of the output of the high low pass parallel circuit and single-chip microcomputer connects, the N roads output of single-chip microcomputer respectively with N roads
The base stage connection for the triode ON circuit being connected in parallel.
Wherein, the microphone receiving module includes amplifying circuit, and the amplifying circuit adjusts output signal voltage equal proportion
It is whole to 0~3.3V.The frequency range of the band-pass circuit is 80~500Hz, and the frequency range of the high low pass parallel circuit is more than 500HZ
And below 80Hz.The single-chip microcomputer is K60, and it includes ADC.It is each in the triode ON circuit that the N roads are connected in parallel
The resistance value of branch road series connection is unequal.Derailing switch, and the addition are provided between the high low pass circuit and single-chip microcomputer input
Operational amplifier both ends resistance in parallel is slide rheostat in device circuit, to realize regulation gain amplifier manually.The height
Circuit passband is parallel with an electric capacity.
Another embodiment, can be according to the speaker system of environment automatic regulating volume, including microphone receiving module, filtering
Circuit module, gain amplifier module, adder circuit, single-chip microcomputer, inverter circuit and output microphone.
Microphone receiving module, for collecting the compound sound wave of human voice signal and environmental noise, acoustical signal is converted into electricity
Signal output is to filter circuit module.
Filter circuit module, including the band-pass circuit being connected in parallel and high low pass parallel circuit, for separating human voice signal
And environmental noise；The band-pass circuit isolates human voice signal, and exports and give gain amplifier module；The high low pass parallel circuit
Noise signal is isolated, and is exported to single-chip microcomputer.
Gain amplifier module, for amplifying human voice signal's gain, including the triode ON circuit that N roads are connected in parallel, put
Human voice signal after big exports the colelctor electrode for the triode ON circuit being connected in parallel to N roads, per road triode ON circuit
Emitter stage exports human voice signal to the negative input end of adder circuit by series resistance.
Adder circuit, the output for the triode ON circuit being connected in parallel for N roads are added, after output gain amplification
Human voice signal is to inverter circuit.
Single-chip microcomputer, for judging noise signal size, and export three poles that N roads control signal is connected in parallel to N roads respectively
The base stage of pipe turning circuit, for controlling the output of gain amplifier module.
Inverter circuit, anti-phase for being carried out to adder circuit output, the human voice signal after output gain amplification is to defeated
Go out microphone.
Microphone is exported, for converting electrical signals to acoustical signal output.
Beneficial effect：Compared with prior art, speaker system of the present utility model collects environmental noise using microphone
Reach single-chip microcomputer and calculated the gain amplifier size for carrying out intelligent control target sound.And utilize the characteristic of the electronic components such as amplifier
Circuit has accomplished change volume gain in the case where not changing circuit parameter, and on the basis of intelligent control, sets simultaneously
Manual control option meets the needs of user.
Brief description of the drawings
Fig. 1 is structured flowchart of the present utility model；
Fig. 2 is circuit diagram of the present utility model.
Embodiment
The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings.
As shown in figure 1, can be according to the speaker system of environment automatic regulating volume, including microphone receiving module 101, filter
Wave circuit module 102, gain amplifier module 103, single-chip microcomputer 104, adder circuit 105, inverter circuit 106 and output Mike
Wind 107.
Microphone receiving module collects the compound sound wave of human voice signal and environmental noise, and acoustical signal is converted into electric signal,
The amplifying circuit (being not drawn into figure) of microphone receiving module is according to different microphone models by output signal voltage equal proportion
It is adjusted to 0-3.3V, and incoming filter circuit module.Filter circuit module is formed in parallel by two parts：Band-pass circuit 1021 and height
Low pass parallel circuit 1022, the electric signal of compound sound wave conversion flow into band-pass circuit and high low pass parallel circuit simultaneously.Daily life
In work, people's sound of speaking frequency is concentrated mainly on 80-500Hz；And because application of the present utility model is classroom and office
In the routine work such as room living environment, so when environmental noise frequency mainly have it is following several：Host computer noise (frequency range
500-1000 hertz), wall clock stopwatch sound (600-1000 hertz of frequency range), tap-tap (500-1000 hertz of frequency range
Hereby), the grating (frequency range 4000-6000 between the sound (1500-2000 hertz of frequency range) of rubbing paper, finger
Hertz), honk (1500-3000 hertz of frequency range), noise (the frequency range about 30- of cold air device and transformer
60Hz) etc., therefore 20-80Hz and 500Hz are taken in summary using super band as noise frequency range.Band-pass circuit frequency range is set to 80~
500Hz, it can separate the human voice signal of 80~500Hz frequency ranges；The frequency range of high low pass parallel circuit is set to below 80Hz
And more than 500HZ, it can be separated below 80Hz and 500HZ with the noise signal of super band.
Human voice signal does not flow directly into gain amplifier module by single-chip microcomputer, is effectively prevented the mistake of human voice signal
Very.Single-chip microcomputer is flowed into using the environmental noise signal of high low pass parallel circuit interception to be judged, it is in parallel before single-chip microcomputer is flowed into
One electric capacity carrys out the amplitude of steady noise signal, to prevent there is waveform mutation so that the judgement of single-chip microcomputer is more accurate.This practicality is new
What type was selected in signal identification part is K60 single-chip microcomputers, final circuit is become compacter using ADC therein, together
When have judge accuracy and design two big advantage of preciseness.It is converted into noise signal by ADC after several electric currents enter single-chip microcomputer,
Single-chip microcomputer judges noise signal size：Noise signal be below 0.5V be one grade, 0.5~1.5V is two gears, 1.5~2.5V is three
Gear and 2.5~3.3V are four gears.Corresponding gain K is respectively K, 2K, 2.8K and 3.5K, and wherein K is basic gain, passes through monolithic
Whether a series of triode ON of output ports control gain amplifier module of machine adjusts gain.
Human voice signal does not flow directly into gain amplifier module by single-chip microcomputer, and it is in parallel to include four tunnels in gain amplifier module
The triode turning circuit of connection, four triodes are controlled by single-chip microcomputer.Four parallel branches are finally incorporated in operational amplifier,
An adder circuit is formed, and because the resistance value of each branch road series connection differs, therefore realize different gain amplifiers.Adding
The resistance of amplifier both ends parallel connection in adder circuit is slide rheostat, can so allow user while intelligent control
Gain amplifier can be adjusted manually.Finally due to the amplifier of adder export for backward voltage, therefore add a reverser at end
Circuit makes the output voltage positive, finally flows into output microphone.
As shown in Fig. 2 the circuit of the speaker system is：Band-pass circuit 1021 is RC filter circuits, wherein amplifier U1,
Its model LM741, RC filter resistances and electric capacity are connected in its negative input end, wherein, C1=100nF, R6=6k Ω；Positive input
Resistance R2 is terminated with, size is 1k Ω, and resistance R3 and R4 are in series between positive input terminal and negative input end, and its size is
10kΩ., R5 is 10k Ω, C2 100nF；The output end of the RC circuits is connected with the input of gain amplifying circuit 103.
High low pass circuit 1022 is two RC circuits being connected in parallel, wherein, C3 199nF, R7 are that 10k Ω, C4 are
318nF, R8 are 1k Ω；Single-chip microcomputer U2 A5 inputs are connected to after two RC circuit in parallel, one electric capacity C5 by derailing switch J1
Mouthful, electric capacity C5 sizes are 796mF.
Gain amplifying circuit 103 includes the triode ON circuit that is connected in parallel of four tunnels, the amplification in above-mentioned band-pass circuit
The colelctor electrode of triode Q1, Q2, Q3 and Q4 in the triode ON circuit that device output end is connected in parallel with four tunnels are connected, three poles
Cast number is 9013, and triode Q1, Q2, Q3 and Q4 emitter stage are in series with resistance R13, R1, R12 and R11 respectively, and resistance is big
Small is respectively 1k Ω, 1.2k Ω, 1.5k Ω and 1k Ω；Single-chip microcomputer U2 output port DQ0, DQ1, DQ2 and DQ3 export respectively to
Triode Q4, Q1, Q2 and Q3 base stage, to control the break-make of triode, reach the purpose of regulation gain.Last four tunnel is in parallel even
Negative input end of the triode ON circuit output connect to adder circuit 105.
Adder circuit includes amplifier U3, model LM741, and its negative input end is parallel with slide rheostat with output end
R15, size are 1k Ω, phase inverter U4 negative input end are connected to after one resistance R14 of output end series connection, R14 sizes are 1k Ω.
Phase inverter U4 negative input end is parallel with resistance R9 with output end, and size is 1k Ω, U4 models LM741.Finally
Inverter output is connected to output microphone, is converted into acoustical signal output.
The utility model done during developing programs it is a large amount of about noise than experiment, pass through fitting experimental data
Noise-noise in real life has drawn the noise under the environmental noise of different decibels than not being one true than curve
Definite value, but the conclusion for the value for changing with environmental noise decibel and changing, therefore this programme carries out the resistance value in amplifying circuit
Adjustment is to meet this change.And in order to allow this programme design to be added more rich in hommization in gain amplifier module variable
Resistance, so that different users can be adjusted when using this Project Product outside the scope automatically adjusted according to self-demand
The volume of output.This programme adds a switch before single-chip microcomputer input, so under some specific occasions, also may be used
To close self-adjustment module by disconnecting single-chip microcomputer preceding switch, now the loudspeaker is exactly raising one's voice for common manual regulation
Device.
Teacher is with can be according to the loudspeaker of environment automatic regulating volume speaker system to student using this on classroom
Attend class.When classroom is more quiet, loudspeaker automatic decision selects a less voice gain amplifier；Suddenly there is classmate
Knock at the door, at this moment tap-tap (500-1000 hertz of frequency range) teaches the teacher for disturbing loudspeaker script as environmental noise
Sound, it have impact on listening for classmate and stress quality；Due to loudspeaker employ this patent can be according to environment automatic regulating volume loudspeaker
System, therefore when tap-tap sounds, the size of system automatic identification tap-tap have selected a larger gain amplifier and cause always
The teaching sound of teacher synchronously becomes big, and listening for classmates is still clear, and listening to stress quality will not also decline.
Claims (8)
1. can be according to the speaker system of environment automatic regulating volume, it is characterised in that including：For collecting human voice signal and ring
The microphone receiving module (101) of border noise, the filter circuit module (102) for separating human voice signal and environmental noise, use
In amplification human voice signal's gain gain amplifier module (103), for judging noise signal size and controlling gain amplifier module
Single-chip microcomputer (104), for gain amplifier module output be added adder circuit (105), for adder circuit
Output carries out anti-phase inverter circuit (106) and the output microphone (107) for exporting human voice signal；
The microphone receiving module is connected in series with filter circuit module, and the filter circuit module includes the band being connected in parallel
Circuit passband (1021) and high low pass parallel circuit (1022), the gain amplifier module include the triode that N roads are connected in parallel and led
Circuit passband；
The colelctor electrode for the triode ON circuit that band-pass circuit output is connected in parallel with N roads is connected, N roads be connected in parallel three
The emitter stage of pole pipe turning circuit is connected by the negative input end of series resistance and adder circuit, the adder circuit
The negative input end of output end and inverter circuit connects, and input of the inverter circuit output with exporting microphone is connected；
The output of the high low pass parallel circuit and the input of single-chip microcomputer connect, and the N roads output of single-chip microcomputer is in parallel with N roads respectively
The base stage connection of the triode ON circuit of connection.
2. speaker system according to claim 1, it is characterised in that：The microphone receiving module includes amplification electricity
Output signal voltage equal proportion is adjusted to 0~3.3V by road, the amplifying circuit.
3. speaker system according to claim 1, it is characterised in that：The frequency range of the band-pass circuit is 80~500Hz,
The frequency range of the high low pass parallel circuit is more than 500HZ and below 80Hz.
4. speaker system according to claim 1, it is characterised in that：The single-chip microcomputer is K60, and it includes ADC.
5. speaker system according to claim 1, it is characterised in that：The triode ON electricity that the N roads are connected in parallel
The resistance value of each branch road series connection is unequal in road.
6. speaker system according to claim 1, it is characterised in that：The high low pass circuit and single-chip microcomputer input it
Between be provided with derailing switch, and operational amplifier both ends resistance in parallel is slide rheostat in the adder circuit, to realize hand
Dynamic regulation gain amplifier.
7. speaker system according to claim 1, it is characterised in that：The high low pass circuit is parallel with an electric capacity.
8. can be according to the speaker system of environment automatic regulating volume, it is characterised in that：Including microphone receiving module, filtered electrical
Road module, gain amplifier module, adder circuit, single-chip microcomputer, inverter circuit and output microphone；
Microphone receiving module, for collecting the compound sound wave of human voice signal and environmental noise, acoustical signal is converted into electric signal
Export to filter circuit module；
Filter circuit module, including the band-pass circuit being connected in parallel and high low pass parallel circuit, for separating human voice signal and ring
Border noise；The band-pass circuit isolates human voice signal, and exports and give gain amplifier module；The high low pass parallel circuit separation
Go out noise signal, and export to single-chip microcomputer；
Gain amplifier module, for amplifying human voice signal's gain, including the triode ON circuit that N roads are connected in parallel, after amplification
Human voice signal export the colelctor electrode of the triode ON circuit being connected in parallel to N roads, per the transmitting of road triode ON circuit
Pole exports human voice signal to the negative input end of adder circuit by series resistance；
Adder circuit, the output for the triode ON circuit being connected in parallel for N roads are added, the voice after output gain amplification
Signal is to inverter circuit；
Single-chip microcomputer, for judging noise signal size, and export the triode that N roads control signal is connected in parallel to N roads respectively and lead
The base stage of circuit passband, for controlling the output of gain amplifier module；
Inverter circuit, anti-phase for being carried out to adder circuit output, the human voice signal after output gain amplification is to exporting wheat
Gram wind；
Microphone is exported, for converting electrical signals to acoustical signal output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720680594.4U CN206851015U (en) | 2017-06-13 | 2017-06-13 | Can be according to the speaker system of environment automatic regulating volume |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720680594.4U CN206851015U (en) | 2017-06-13 | 2017-06-13 | Can be according to the speaker system of environment automatic regulating volume |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206851015U true CN206851015U (en) | 2018-01-05 |
Family
ID=60799790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720680594.4U Withdrawn - After Issue CN206851015U (en) | 2017-06-13 | 2017-06-13 | Can be according to the speaker system of environment automatic regulating volume |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206851015U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109639904A (en) * | 2019-01-25 | 2019-04-16 | 努比亚技术有限公司 | A kind of handset mode method of adjustment, system and computer storage medium |
| CN110446146A (en) * | 2019-08-07 | 2019-11-12 | 常州科先达通讯技术有限公司 | Smart speakers |
| CN110708625A (en) * | 2019-09-25 | 2020-01-17 | 华东师范大学 | Intelligent terminal-based environment sound suppression and enhancement adjustable earphone system and method |
| CN111988704A (en) * | 2019-05-21 | 2020-11-24 | 北京小米移动软件有限公司 | Sound signal processing method, device and storage medium |
-
2017
- 2017-06-13 CN CN201720680594.4U patent/CN206851015U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109639904A (en) * | 2019-01-25 | 2019-04-16 | 努比亚技术有限公司 | A kind of handset mode method of adjustment, system and computer storage medium |
| CN111988704A (en) * | 2019-05-21 | 2020-11-24 | 北京小米移动软件有限公司 | Sound signal processing method, device and storage medium |
| CN111988704B (en) * | 2019-05-21 | 2021-10-22 | 北京小米移动软件有限公司 | Sound signal processing method, device and storage medium |
| CN110446146A (en) * | 2019-08-07 | 2019-11-12 | 常州科先达通讯技术有限公司 | Smart speakers |
| CN110708625A (en) * | 2019-09-25 | 2020-01-17 | 华东师范大学 | Intelligent terminal-based environment sound suppression and enhancement adjustable earphone system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180105 Effective date of abandoning: 20230512 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180105 Effective date of abandoning: 20230512 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |