CN107040846A - Four-way acoustics automatic filter device - Google Patents
Four-way acoustics automatic filter device Download PDFInfo
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- CN107040846A CN107040846A CN201710278844.6A CN201710278844A CN107040846A CN 107040846 A CN107040846 A CN 107040846A CN 201710278844 A CN201710278844 A CN 201710278844A CN 107040846 A CN107040846 A CN 107040846A
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- sound collection
- data
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- sound
- processor
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Classifications
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- 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
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
Abstract
Four-way acoustics automatic filter device, is related to clutter and filters out field.The present invention be in order to solve it is existing lack denoising performance good device the problem of.Four sound collection Mikes circumferentially uniformly arrange by shape, sound collection circuit and operational amplifier are provided with each sound collection Mike, the sound collection signal input part of the sound collection signal output part concatenation operation amplifier of each sound collection circuit, the signal amplification output end of four operational amplifiers connects four A/D path inputs of processor respectively, processor, the data of four A/D passages are gathered for the same time, cached, the data that four passages are collected are 4 kinds of amplitude datas, the data of the amplitude maximum data minimum with amplitude are made the difference, the difference for making the difference acquisition is averaged with other two kinds of amplitude datas again, so as to filter ambient noise, the output sound waveform without noise jamming completely.It is used for denoising.
Description
Technical field
The present invention relates to four-way acoustics automatic filter device, belong to clutter and filter out field.
Background technology
Existing sound collection is inputted using common Mike, many background sounds is always had in the case of noisy defeated
Enter, sound at this moment to be collected mixes background sound, hearer can not hear when playing, or be difficult to differentiate the sound for wanting to listen
Sound.
In the prior art, there is denoising, but denoising is poor.
For these reasons, have a drawback in that in the prior art：It is existing to lack the good device of denoising performance.
The content of the invention
The present invention be in order to solve it is existing lack denoising performance good device the problem of, four-way acoustics is now provided and filtered automatically
Wave apparatus.
Four-way acoustics automatic filter device, it includes four sound collection Mikes and processor,
Four sound collection Mikes circumferentially uniformly arranged by shape, and sound collection electricity is provided with each sound collection Mike
Road and operational amplifier,
The sound collection signal input of the sound collection signal output part concatenation operation amplifier of each sound collection circuit
End, the signal amplification output end of four operational amplifiers connects four A/D path inputs of processor respectively,
Processor, the data of four A/D passages are gathered for the same time, are cached, the number that four passages are collected
According to for 4 kinds of amplitude datas, the data of amplitude maximum and the minimum data of amplitude are made the difference, then will make the difference the difference of acquisition with addition
Two kinds of amplitude datas are averaged, so that ambient noise has been filtered, the output sound waveform without noise jamming completely.
Beneficial effects of the present invention are：
The present invention is believed this by respective operational amplifier using the sound in four sound collection Mike collection environment
Number amplification after be transmitted to processor carry out data processing, processor, for the same time gather four A/D passages data, carry out
Caching, the data that four passages are collected are divided into 4 kinds of amplitude datas, and the data of the amplitude maximum data minimum with amplitude are done
Difference, then the data after making the difference are averaged with other two kinds of amplitude datas, so as to filter ambient noise, output does not have completely
The sound waveform of noise jamming.
The application is using four sound collection Mike collection sound, and compared to using two Mike's collection sound, filtering property is good,
The problem of effectively removing sound dead angle.
Brief description of the drawings
Fig. 1 is the principle schematic of the four-way acoustics automatic filter device described in embodiment one；
Fig. 2 is the sound waveform figure that four-way is obtained under zero noise circumstance；
Fig. 3 is the pure noise inputs oscillogram of four-way；
Fig. 4 is the four-way sound input waveform figure for having noise effects,
Fig. 5 is the audiovideo exported after processor is handled.
Embodiment
Embodiment one：Reference picture 1 and Fig. 5 illustrate present embodiment, the four-way described in present embodiment
Acoustics automatic filter device, it includes four sound collection Mikes and processor,
Four sound collection Mikes circumferentially uniformly arranged by shape, and sound collection electricity is provided with each sound collection Mike
Road and operational amplifier,
The sound collection signal input of the sound collection signal output part concatenation operation amplifier of each sound collection circuit
End, the signal amplification output end of four operational amplifiers connects four A/D path inputs of processor respectively,
Processor, the data of four A/D passages are gathered for the same time, are cached, the number that four passages are collected
According to for 4 kinds of amplitude datas, the data of amplitude maximum and the minimum data of amplitude are made the difference, then will make the difference the difference of acquisition with addition
Two kinds of amplitude datas are averaged, so that ambient noise has been filtered, the output sound waveform without noise jamming completely.
In present embodiment, the sound waveform figure that four-way is obtained under zero noise circumstance in Fig. 2, which can be seen that, not to be had
In the case of noisy, the waveform of four passages is basically identical, and simply amplitude is had any different；Fig. 3 be natural environment in obtain four
The collection waveform of individual passage, it can be seen that the waveform in Fig. 3 is basically identical；Fig. 4 is the four-way sound for having noise effects
Input waveform figure, it can be seen that have obtained in the sound under noise circumstance amplitude it is high be exactly effective sound, amplitude frequency phase
Be exactly noise, pass through the computing and to signal transacting of checking the mark, progress denoising.Fig. 5 is the audiovideo exported after handling.
Embodiment two：Present embodiment is to the four-way acoustics automatic filter dress described in embodiment one
Put and further illustrate, in present embodiment, sound collection circuit is realized using model MB96F386 chip.
Embodiment three：Present embodiment is to the four-way acoustics automatic filter dress described in embodiment one
Put and further illustrate, in present embodiment, the processor same time gathers the data of four A/D passages, is caching 200 milliseconds
After data, start to process data.
Embodiment four：Present embodiment is to the four-way acoustics automatic filter dress described in embodiment one
Put and further illustrate, in present embodiment, sound collection circuit is realized using Electret condenser microphone.
Claims (4)
1. four-way acoustics automatic filter device, it is characterised in that it includes four sound collection Mikes and processor,
Four sound collection Mikes circumferentially uniformly arrange by shape, be provided with each sound collection Mike sound collection circuit and
Operational amplifier,
The sound collection signal input part of the sound collection signal output part concatenation operation amplifier of each sound collection circuit, four
The signal amplification output end of individual operational amplifier connects four A/D path inputs of processor respectively,
Processor, the data of four A/D passages are gathered for the same time, are cached, and the data that four passages are collected are 4
Kind of amplitude data, the data of amplitude maximum and the minimum data of amplitude are made the difference, then by make the difference acquisition difference and other two kinds
Amplitude data is averaged, so that ambient noise has been filtered, the output sound waveform without noise jamming completely.
2. four-way acoustics automatic filter device according to claim 1, it is characterised in that sound collection circuit uses type
Number for MB96F386 chip realize.
3. four-way acoustics automatic filter device according to claim 1, it is characterised in that the same time collection of processor
The data of four A/D passages, after 200 milliseconds of data are cached, start to process data.
4. four-way acoustics automatic filter device according to claim 1, it is characterised in that sound collection circuit is used and stayed
Electret microphone is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710278844.6A CN107040846A (en) | 2017-04-25 | 2017-04-25 | Four-way acoustics automatic filter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710278844.6A CN107040846A (en) | 2017-04-25 | 2017-04-25 | Four-way acoustics automatic filter device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107040846A true CN107040846A (en) | 2017-08-11 |
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ID=59535710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201710278844.6A Pending CN107040846A (en) | 2017-04-25 | 2017-04-25 | Four-way acoustics automatic filter device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060106601A1 (en) * | 2004-11-18 | 2006-05-18 | Samsung Electronics Co., Ltd. | Noise elimination method, apparatus and medium thereof |
| CN101882442A (en) * | 2009-05-04 | 2010-11-10 | 上海音乐学院 | Historical voice frequency noise detection and elimination method |
| CN102901949A (en) * | 2012-10-13 | 2013-01-30 | 天津大学 | Two-dimensional spatial distribution type relative sound positioning method and device |
| CN205283790U (en) * | 2015-11-30 | 2016-06-01 | 深圳市文鼎创数据科技有限公司 | Sound acquisition circuit |
-
2017
- 2017-04-25 CN CN201710278844.6A patent/CN107040846A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060106601A1 (en) * | 2004-11-18 | 2006-05-18 | Samsung Electronics Co., Ltd. | Noise elimination method, apparatus and medium thereof |
| CN101882442A (en) * | 2009-05-04 | 2010-11-10 | 上海音乐学院 | Historical voice frequency noise detection and elimination method |
| CN102901949A (en) * | 2012-10-13 | 2013-01-30 | 天津大学 | Two-dimensional spatial distribution type relative sound positioning method and device |
| CN205283790U (en) * | 2015-11-30 | 2016-06-01 | 深圳市文鼎创数据科技有限公司 | Sound acquisition circuit |
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Application publication date: 20170811 |
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