CN107896358A - A kind of voice modifies device - Google Patents
A kind of voice modifies device Download PDFInfo
- Publication number
- CN107896358A CN107896358A CN201711187868.7A CN201711187868A CN107896358A CN 107896358 A CN107896358 A CN 107896358A CN 201711187868 A CN201711187868 A CN 201711187868A CN 107896358 A CN107896358 A CN 107896358A
- Authority
- CN
- China
- Prior art keywords
- module
- rectification
- audio signal
- operational amplifier
- rectification module
- 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.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
Abstract
The invention discloses a kind of voice to modify device, including main body and the control module being arranged in main body, buffer module that control module includes being used to receive audio signal, the first filtration module of sampling core frequency for adjusting audio signal, the rectification module for producing electric power even-order harmonic, the second filtration module of LPF for realizing audio signal and the output module for exporting the audio signal after modifying, buffer module, the first filtration module, rectification module, the second filtration module and output module are sequentially connected.The present invention can retouch to the audio signal of voice, make audience be easier not hearing the particular content of speech, in order to reach effect of being made a speech expected from spokesman.
Description
Technical field
The present invention relates to Audiotechnica field, especially a kind of voice modification device.
Background technology
Spokesman generally requires in the speech of big occasion and produces preferable effect, i.e., clearly can be heard by audience, no
Then speech effect can have a greatly reduced quality.Although spoken voice can be amplified by current conference system using sound amplifier, so that
Audience is easier to hear, but due to not retouched to voice, is sometimes difficult to plus factor, audiences such as numerous and diverse noises at scene
The particular content of speech is caught, does not reach the expected speech effect of spokesman.
The content of the invention
In order to solve the above problems, it is an object of the invention to provide a kind of voice to modify device, and the audio of voice can be believed
Number retouched, make audience be easier not hearing the particular content of speech.
In order to solve the above problems, the technical solution adopted by the present invention is：
A kind of voice modifies device, including main body and the control module being arranged in main body, and control module is including for receiving
The buffer module of audio signal, the first filtration module of sampling core frequency for adjusting audio signal, for producing electric power
The rectification module of even-order harmonic, the second filtration module of LPF for realizing audio signal and for after exporting and modifying
The output module of audio signal, buffer module, the first filtration module, rectification module, the second filtration module and output module are successively
Connection.
First filtration module includes the first operational amplifier and the slide resistor for realizing the regulation of sampling core frequency,
One end of slide resistor is connected respectively to the normal phase input end and simulation ground of the first operational amplifier.
Rectification module includes the first rectification module and the second rectification module, and the input of the first rectification module is connected to first
The output end of operational amplifier, the output end of the first rectification module are connected to the input of the second rectification module, the second rectification mould
The input of block is connected to the second filtration module.
First rectification module includes the second operational amplifier and is used as the first switch diode and second switch of rectification
Diode, first switch diode and second switch diode are in parallel, and the positive pole and negative pole of first switch diode connect respectively
The output end and negative-phase input of the second operational amplifier are connected to, the normal phase input end of the second operational amplifier is connected with simulation ground
Connect.
Second rectification module includes the 3rd operational amplifier, first resistor and the first electric capacity, first resistor and the first electric capacity
It is connected in parallel and both ends is connected to the negative-phase input and output end of the 3rd operational amplifier, the positive of the 3rd operational amplifier is defeated
Enter end with simulation to be connected.
The beneficial effects of the invention are as follows：A kind of voice modification device provided by the invention, including control module, using controlling mould
Block carries out the moditied processings such as the regulation of center sampling frequency, bandpass filtering, amplifier rectification and LPF to audio signal, makes sound
The waveform of frequency signal changes, and so as to improve the readability for the voice that audio signal is carried, makes audience be easier not hearing
The particular content of speech, in order to reach effect of being made a speech expected from spokesman.
Brief description of the drawings
Present pre-ferred embodiments are provided below in conjunction with the accompanying drawings, to describe embodiment of the present invention in detail.
Fig. 1 is the circuit theory diagrams of the control module of the present invention.
Embodiment
Reference picture 1, a kind of voice of the invention modification device, including main body and the control module being arranged in main body, control
First filtering of the buffer module 1 that module includes being used to receive audio signal, the sampling core frequency for adjusting audio signal
Module 2, the rectification module 3 for producing electric power even-order harmonic, the second filtering mould of LPF for realizing audio signal
Block 4 and for export modify after audio signal output module 5, buffer module 1, the first filtration module 2, rectification module 3,
Second filtration module 4 and output module 5 are sequentially connected.
Wherein, reference picture 1, the first filtration module 2 include the first operational amplifier U1A and for realizing sampling core frequency
The slide resistor RP1 of regulation, slide resistor RP1 one end are connected respectively to the first operational amplifier U1A positive input
End and simulation ground.
Specifically, after audio signal is input to buffer module 1, it is divided into two-way, delivers to the input of output module 5 all the way
End, another way deliver to the first filtration module 2, can make sampling core frequency in 300Hz- by slide resistor RP1 regulation
Consecutive variations between 10kHz, it is sampled after audio frequency component be admitted to rectification module 3, further produce abundant even-order harmonic,
Then pass through the second filtration module 4, output is finally mixed by output module 5；Even-order harmonic is that rated frequency is even for fundamental frequency
The harmonic component of several times, it can be become more stable when the conversion of even-order harmonic occurs for the waveform of audio signal, correspondingly, people's
Sound also becomes apparent from；In this embodiment, it is preferred that buffer module 1 is input buffer, centered on the first filtration module 2
Bandpass filter, rectification module 3 are amplifier rectification circuit, and the second filtration module 4 is low pass filter, and output module 5 is addition
Device；The regulation of center sampling frequency, bandpass filtering, amplifier rectification and LPF etc. are carried out to audio signal using control module
Moditied processing, the waveform of audio signal is changed, so as to improve the readability for the voice that audio signal is carried, make to listen
Crowd is easier not hearing the particular content of speech, in order to reach effect of being made a speech expected from spokesman.
Reference picture 1, rectification module 3 include the first rectification module 31 and the second rectification module 32, the first rectification module 31
Input is connected to the first operational amplifier U1A output end, and the output end of the first rectification module 31 is connected to the second rectification mould
The input of block 32, the input of the second rectification module 32 are connected to the second filtration module 4.
Reference picture 1, the first rectification module 31 include the second operational amplifier U2B and are used as the pole of first switch two of rectification
Pipe D1 and second switch diode D2, first switch diode D1 and second switch diode D2 are in parallel, the pole of first switch two
Pipe D1 positive pole and negative pole is connected respectively to the second operational amplifier U2B output end and negative-phase input, the second operation amplifier
Device U2B normal phase input end is connected with simulation ground.In the present embodiment, first switch diode D1 and the pole of second switch two
Pipe D2 uses 1N1418 chips, and 1N4148 chips are a kind of miniature high-speed switching diodes, and it is higher to be widely used in signal frequency
Circuit carry out one-way conduction isolation, such as communication, computer board, TV set circuit and industrial control circuit etc..
Reference picture 1, the second rectification module 32 include the 3rd operational amplifier U2A, first resistor R6 and the first electric capacity C22,
First resistor R6 is connected in parallel with the first electric capacity C22 and both ends are connected to the 3rd operational amplifier U2A negative-phase input and defeated
Go out end, the 3rd operational amplifier U2A normal phase input end is connected with simulation ground.First resistor R6 and the first electric capacity C22 compositions
Alternate path good rectified action can be played to sampling audio signal, while be the second filtration module 4 of next pole
LPF is got ready.
Presently preferred embodiments of the present invention and general principle are discussed in detail above content, but the invention is not limited in
Above-mentioned embodiment, those skilled in the art should be recognized that also had on the premise of without prejudice to spirit of the invention it is various
Equivalent variations and replacement, these equivalent variations and replacement all fall within the protetion scope of the claimed invention.
Claims (5)
1. a kind of voice modifies device, including main body and the control module that is arranged in main body, it is characterised in that：The control module
First filtering mould of the sampling core frequency including the buffer module (1) for receiving audio signal, for adjusting audio signal
Second filtering of block (2), the rectification module (3) for producing electric power even-order harmonic, LPF for realizing audio signal
Module (4) and the output module (5) for exporting the audio signal after modifying, the buffer module (1), the first filtration module
(2), rectification module (3), the second filtration module (4) and output module (5) are sequentially connected.
A kind of 2. voice modification device according to claim 1, it is characterised in that：First filtration module (2) includes the
One operational amplifier (U1A) and the slide resistor (RP1) for realizing the regulation of sampling core frequency, the slide resistor
(RP1) one end is connected respectively to the normal phase input end and simulation ground of the first operational amplifier (U1A).
A kind of 3. voice modification device according to claim 1, it is characterised in that：It is whole that the rectification module (3) includes first
Flow module (31) and the second rectification module (32), the input of first rectification module (31) are connected to the first operational amplifier
(U1A) output end, the output end of first rectification module (31) is connected to the input of the second rectification module (32), described
The input of second rectification module (32) is connected to the second filtration module (4).
A kind of 4. voice modification device according to claim 3, it is characterised in that：First rectification module (31) includes the
Two operational amplifiers (U2B) and the first switch diode (D1) and second switch diode (D2) for being used as rectification, described
One switching diode (D1) and second switch diode (D2) are in parallel, the positive pole and negative pole of the first switch diode (D1)
The output end and negative-phase input of the second operational amplifier (U2B) are connected respectively to, second operational amplifier (U2B) is just
Phase input is connected with simulation ground.
A kind of 5. voice modification device according to claim 3, it is characterised in that：Second rectification module (32) includes the
Three operational amplifiers (U2A), first resistor (R6) and the first electric capacity (C22), the first resistor (R6) and the first electric capacity (C22)
It is connected in parallel and both ends is connected to the negative-phase input and output end of the 3rd operational amplifier (U2A), the 3rd operation amplifier
The normal phase input end of device (U2A) is connected with simulation ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711187868.7A CN107896358A (en) | 2017-11-24 | 2017-11-24 | A kind of voice modifies device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711187868.7A CN107896358A (en) | 2017-11-24 | 2017-11-24 | A kind of voice modifies device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107896358A true CN107896358A (en) | 2018-04-10 |
Family
ID=61806026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711187868.7A Pending CN107896358A (en) | 2017-11-24 | 2017-11-24 | A kind of voice modifies device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107896358A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1135120A (en) * | 1995-02-27 | 1996-11-06 | 松下电器产业株式会社 | Bass enhancement circuit |
| CN200997682Y (en) * | 2007-01-26 | 2007-12-26 | 刘鉴明 | Special loundspaker for increasing speech resolution in conference |
| CN101326853A (en) * | 2005-12-13 | 2008-12-17 | Nxp股份有限公司 | Device for and method of processing an audio data stream |
| CN102026062A (en) * | 2010-07-30 | 2011-04-20 | 炬力集成电路设计有限公司 | Integrated circuit, method and chip for microphone signal preamplification as well as electronic equipment |
| WO2013036710A1 (en) * | 2011-09-08 | 2013-03-14 | Bose Corporation | Versatile audio power amplifier |
| CN104471961A (en) * | 2012-05-29 | 2015-03-25 | 创新科技有限公司 | Adaptive bass processing system |
| CN204498353U (en) * | 2015-04-16 | 2015-07-22 | 江西科技学院 | A kind of active audio frequency harmonic absorbing circuit |
-
2017
- 2017-11-24 CN CN201711187868.7A patent/CN107896358A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1135120A (en) * | 1995-02-27 | 1996-11-06 | 松下电器产业株式会社 | Bass enhancement circuit |
| CN101326853A (en) * | 2005-12-13 | 2008-12-17 | Nxp股份有限公司 | Device for and method of processing an audio data stream |
| CN200997682Y (en) * | 2007-01-26 | 2007-12-26 | 刘鉴明 | Special loundspaker for increasing speech resolution in conference |
| CN102026062A (en) * | 2010-07-30 | 2011-04-20 | 炬力集成电路设计有限公司 | Integrated circuit, method and chip for microphone signal preamplification as well as electronic equipment |
| WO2013036710A1 (en) * | 2011-09-08 | 2013-03-14 | Bose Corporation | Versatile audio power amplifier |
| CN104471961A (en) * | 2012-05-29 | 2015-03-25 | 创新科技有限公司 | Adaptive bass processing system |
| CN204498353U (en) * | 2015-04-16 | 2015-07-22 | 江西科技学院 | A kind of active audio frequency harmonic absorbing circuit |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180410 |
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| RJ01 | Rejection of invention patent application after publication |