CN106847254A - A kind of locality active noise reduction system - Google Patents
A kind of locality active noise reduction system Download PDFInfo
- Publication number
- CN106847254A CN106847254A CN201710160185.6A CN201710160185A CN106847254A CN 106847254 A CN106847254 A CN 106847254A CN 201710160185 A CN201710160185 A CN 201710160185A CN 106847254 A CN106847254 A CN 106847254A
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- CN
- China
- Prior art keywords
- noise reduction
- locality
- circuit
- reduction system
- module
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- 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.)
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Classifications
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention discloses a kind of locality active noise reduction system, including sound detection module, control module, loudspeaker, LCD MODULE.Sound detection module collects the noise signal of environment, and by the treatment of signal processing module, controlling loudspeaker array sends the voice signal with noise signal opposite phase, and noise is offset in a fixed range.The present invention can be strong and weak with automatic detection noise, and work is automatically begun to when noise is stronger.A space quiet enough can be in a noisy environment provided, so that people rest or work.
Description
Technical field
The present invention relates to noise reduction technology field, more particularly to a kind of locality active noise reduction system.
Background technology
With developing rapidly for current social, noise makes us irritated problem very much as one in people's daily life,
Including the noise that construction noise, neighbouring people talk etc..But, we typically only need to obtain a phase in certain area coverage
To quiet environment, such as, it is necessary to the near zone of bed is relatively quiet when sleep, needed near desk when study
Create a quiet environment.
The content of the invention
In order to solve above-mentioned problem, the present invention provides a kind of locality active noise reduction system, can meet people
A demand for No Tooting Area is obtained in noisy environment.
The purpose of the present invention can be realized by following technical proposal：A kind of locality active noise reduction system, including sound
Detection circuit, acoustic processing module, control module, loudspeaker, LCDs.Sound detection module is connected with control module,
Control module is connected with loudspeaker.
The sound detection circuit includes sound transducer, signal amplification circuit, is connected with acoustic processing module, will gather
To noise signal spread out of acoustic processing module.
The acoustic processing module includes delay circuit, amplifying circuit, negater circuit, process chip, the delay circuit
Output signal pass to amplifying circuit, the output of amplifying circuit is amplified signal and is connected with the input of negater circuit, reverse electric
The opposite signal of road output phase, and pass to control module.
The control module uses K60 chips, and including wireless receiving module, is sent according to ambient noise size and user
Instruction carrys out the operation of control system.
The loudspeaker is connected with control module output end, sends the acoustic signals for offsetting noise.
The LCDs is connected with control module, and current operating state, ambient noise and noise reduction region are shown in real time
Sound decibel.
Further, described locality noise reduction system includes a main frame and four slaves, and main frame has acoustic processing mould
Block, control module, LCDs, each slave include sound detection circuit, loudspeaker.
After employing above-mentioned technology, the locality noise reduction system that the present invention is provided has advantages below：Four slaves are same
When work, in the case where surrounding environment is not changed for people provide an adjustable No Tooting Area of scope, facilitate people's
Rest and work and study.
Brief description of the drawings
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the schematic diagram of sound detection circuit；
Fig. 3 is the control principle schematic diagram of acoustic processing module；
Fig. 4 is loudspeaker driving circuit；
In figure, main frame 1, slave 2.
Specific embodiment
In order to more specifically describe the present invention, below in conjunction with the accompanying drawings and specific embodiment is to technical scheme
It is described in detail.
Fig. 1 overall structure diagram of the invention.The main body of invention includes a main frame 1 and four slaves 2, main frame 1
Including acoustic processing module, control module, LCDs, each slave 2 includes sound detection circuit, loudspeaker.Wherein, from
By radio communication between machine 2 and main frame 1, its position can arbitrarily put, easily to provide the adjustable peace and quiet in region
Space.
Fig. 2 is the schematic diagram of sound detection circuit.The circuit includes a microphone and signal amplification circuit.Mike's elegance
Collect current environmental sound signal, acoustic processing module is passed to after signal amplification circuit amplifies.
Fig. 3 is the control principle schematic diagram of acoustic processing module.The present invention carries out active noise reduction using FX-LMS algorithm,
Can timely tracking noise signal change, reach relatively good noise reduction.
Control module uses K60 chips, while including a loudspeaker driving circuit, such as Fig. 4 sends according to control chip
Signal carry out controlling loudspeaker and send the sound wave of needs by noise cancellation.
Claims (6)
1. a kind of locality active noise reduction system, it is characterised in that：Including sound detection circuit, acoustic processing module, control mould
Block, loudspeaker, LCDs.Sound detection module is connected with control module, and control module is connected with loudspeaker.The sound
Detection circuit includes sound transducer, signal amplification circuit, and sound detection circuit is connected with acoustic processing module, by what is collected
Noise signal spreads out of acoustic processing module.
2. locality active noise reduction system according to claim 1, it is characterised in that：The acoustic processing module includes prolonging
When circuit, amplifying circuit, negater circuit, process chip, the output signal of the delay circuit passes to amplifying circuit, amplifies electricity
The output on road is amplified signal and is connected with the input of negater circuit, the opposite signal of negater circuit output phase, and passes to control
Molding block.
3. locality active noise reduction system according to claim 1, it is characterised in that：The control module uses K60 cores
Piece, and including wireless receiving module, the operation of control system is sent the commands to according to ambient noise size and user.
4. locality active noise reduction system according to claim 1, it is characterised in that：The loudspeaker is defeated with control module
Go out end to be connected, send the acoustic signals for offsetting noise.
5. locality active noise reduction system according to claim 1, it is characterised in that：The LCDs and control mould
Block is connected, and current operating state, ambient noise and noise reduction region sound decibel are shown in real time.
6. locality active noise reduction system according to claim 1, it is characterised in that：Including a main frame and four from
Machine, main frame has acoustic processing module, control module, LCDs, and each slave includes sound detection circuit, loudspeaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710160185.6A CN106847254A (en) | 2017-03-17 | 2017-03-17 | A kind of locality active noise reduction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710160185.6A CN106847254A (en) | 2017-03-17 | 2017-03-17 | A kind of locality active noise reduction system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106847254A true CN106847254A (en) | 2017-06-13 |
Family
ID=59145198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710160185.6A Pending CN106847254A (en) | 2017-03-17 | 2017-03-17 | A kind of locality active noise reduction system |
Country Status (1)
| Country | Link |
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| CN (1) | CN106847254A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107909992A (en) * | 2017-12-04 | 2018-04-13 | 成都星达微科技有限公司 | A kind of campus dormitory active noise reduction system of powered stable |
| CN107978309A (en) * | 2017-12-04 | 2018-05-01 | 成都星达微科技有限公司 | A kind of campus dormitory active noise reduction system based on demographics |
| CN107993644A (en) * | 2017-12-04 | 2018-05-04 | 成都星达微科技有限公司 | A kind of campus dormitory active noise reduction system based on time switch |
| CN107993645A (en) * | 2017-12-04 | 2018-05-04 | 成都星达微科技有限公司 | A kind of campus dormitory active noise reduction system based on Noise Acquisition |
| US11322128B2 (en) | 2020-09-22 | 2022-05-03 | International Business Machines Corporation | Virtual ambient zone creation in co-working spaces |
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| JPS5895806A (en) * | 1981-12-02 | 1983-06-07 | Hitachi Ltd | Noiseproof device for stationary induction apparatus |
| CN101369422A (en) * | 2008-04-22 | 2009-02-18 | 中国印钞造币总公司 | Active denoising method |
| CN201260224Y (en) * | 2008-08-04 | 2009-06-17 | 宇龙计算机通信科技(深圳)有限公司 | Noise reducing device and noise reducing mobile terminal |
| CN203134364U (en) * | 2012-10-29 | 2013-08-14 | 郑力铭 | Door and window active noise reduction device |
| CN104053093A (en) * | 2014-06-25 | 2014-09-17 | 南京信息工程大学 | Portable indoor noise reduction device |
| CN205827914U (en) * | 2016-06-29 | 2016-12-21 | 广州恒成智道信息科技有限公司 | Indoor active noise reducing device |
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2017
- 2017-03-17 CN CN201710160185.6A patent/CN106847254A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5895806A (en) * | 1981-12-02 | 1983-06-07 | Hitachi Ltd | Noiseproof device for stationary induction apparatus |
| CN101369422A (en) * | 2008-04-22 | 2009-02-18 | 中国印钞造币总公司 | Active denoising method |
| CN201260224Y (en) * | 2008-08-04 | 2009-06-17 | 宇龙计算机通信科技(深圳)有限公司 | Noise reducing device and noise reducing mobile terminal |
| CN203134364U (en) * | 2012-10-29 | 2013-08-14 | 郑力铭 | Door and window active noise reduction device |
| CN104053093A (en) * | 2014-06-25 | 2014-09-17 | 南京信息工程大学 | Portable indoor noise reduction device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107909992A (en) * | 2017-12-04 | 2018-04-13 | 成都星达微科技有限公司 | A kind of campus dormitory active noise reduction system of powered stable |
| CN107978309A (en) * | 2017-12-04 | 2018-05-01 | 成都星达微科技有限公司 | A kind of campus dormitory active noise reduction system based on demographics |
| CN107993644A (en) * | 2017-12-04 | 2018-05-04 | 成都星达微科技有限公司 | A kind of campus dormitory active noise reduction system based on time switch |
| CN107993645A (en) * | 2017-12-04 | 2018-05-04 | 成都星达微科技有限公司 | A kind of campus dormitory active noise reduction system based on Noise Acquisition |
| US11322128B2 (en) | 2020-09-22 | 2022-05-03 | International Business Machines Corporation | Virtual ambient zone creation in co-working spaces |
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| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20170613 |