WO2017028291A1 - Antiphase-wave muffler - Google Patents
Antiphase-wave muffler Download PDFInfo
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- WO2017028291A1 WO2017028291A1 PCT/CN2015/087585 CN2015087585W WO2017028291A1 WO 2017028291 A1 WO2017028291 A1 WO 2017028291A1 CN 2015087585 W CN2015087585 W CN 2015087585W WO 2017028291 A1 WO2017028291 A1 WO 2017028291A1
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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
- G10K11/1785—Methods, e.g. algorithms; Devices
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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
- G10K11/1787—General system configurations
- G10K11/17873—General system configurations using a reference signal without an error signal, e.g. pure feedforward
Definitions
- the invention belongs to the technical field of noise processing, and in particular relates to a silencer.
- Noise refers to unwanted, unwanted sounds. Noise pollution, water pollution and air pollution are the three major public hazards in the world. Noise can be roughly divided into: traffic noise, industrial noise, living noise and other noise. When decorating noise, new buildings or old buildings, wall-breaking bricks, wall-holes, etc. will bring a series of noises, making the neighbors reluctant to be peaceful.
- noise can cause a variety of diseases, so people call noise invisible killers. Its damage is most obvious with neurological symptoms, such as dizziness, headache, insomnia, fatigue, aversion, memory loss, inattention and other symptoms, accompanied by tinnitus and hearing loss. There is a lot of evidence that noise is still an important cause of heart disease and high blood pressure.
- the present invention provides an anti-wave silencer capable of actively reducing noise and improving quality of life.
- the invention is achieved by the following technical solutions:
- An anti-wave muffler comprising a noise collector, a data processor, a power amplifier and a speaker; the noise collector is configured to collect a noise signal and input to the data processor; the data processor is configured to The frequency, phase, and power of the signal are analyzed, and then an active noise reduction echo signal having the same frequency, opposite phase, and power close to the noise signal is generated; the power amplifier and the horn are used to transmit the active noise reduction signal Output.
- the anti-wave muffler further includes a power supply circuit.
- the power supply of the power supply circuit is a lithium battery that is high in energy storage.
- the data processor is a microcontroller MCU.
- the invention has the beneficial effects that the anti-wave muffler of the invention collects the noise signal generated by the noise sound source, and generates an inverted signal according to the collected noise signal, and the waveform of the inverted signal has the same frequency and amplitude as the waveform of the noise signal. Same, phase difference 180°, when noise After superimposing the signal and the inverted signal, because the frequency is the same, the phase is opposite, and the power is close, the positive and negative cancel, and ideally, close to the silent state, thereby achieving the purpose of noise reduction.
- the anti-wave muffler of the invention can actively reduce noise and improve the quality of life, has the advantages of low cost, simple implementation, convenient promotion and good application value.
- Figure 1 is a waveform diagram of noise
- Figure 2 is an inverted waveform diagram of noise
- Figure 3 is a schematic diagram of the anti-wave muffler of the present invention.
- Figure 5 is a data processing circuit diagram of the anti-wave muffler of the present invention.
- Figure 6 is a circuit diagram of a reverse wave output of the anti-wave muffler of the present invention.
- Fig. 7 is a power supply circuit diagram of the anti-wave muffler of the present invention.
- the anti-wave muffler of the present invention collects a noise signal generated by a noise source, and the noise signal is as shown in FIG. 1, and generates an inverted signal as shown in FIG. 2 according to the collected noise signal, and the waveform and noise of the inverted signal.
- the waveforms of the signals have the same frequency, the same amplitude, and the phases are 180° out of phase.
- the noise signal is superimposed on the inverted signal, the frequency is the same, the phase is opposite, and the power is close. Therefore, the positive and negative cancel, as shown in Figure 3, the ideal state. Down, close to the silent state, thus achieving the purpose of noise reduction.
- the anti-wave muffler of the present invention comprises: a noise collector, a data processor, a power amplifier and a speaker. After collecting the noise signal, the noise collector inputs to the data processor.
- the data processor analyzes the frequency, phase, and power of the noise signal, and then generates an active noise reduction echo signal having the same frequency, opposite phase, and close power as the noise signal.
- the power amplifier and the speaker output the active noise reduction back wave signal.
- the noise collecting circuit of the anti-wave muffler of the present invention includes a microphone and an operational amplifier circuit and an auxiliary capacitor and resistor.
- the data processor adopts a micro control unit MCU.
- the MCU receives the noise signal (signal1) output by the noise collecting circuit, and inputs an active noise reduction back signal (ctrl) after the analysis and processing.
- the circuit includes a resistor, a triode, a power amplifier and a horn.
- the active noise reduction echo signal (ctrl) drives the triode to turn on the power amplifier and input it into the external environment through the horn.
- the anti-wave muffler of the invention can actively reduce noise and improve the quality of life, has the advantages of low cost, simple implementation, convenient promotion and good application value.
Abstract
Provided is an antiphase-wave muffler, comprising: a noise collector, a data processor, a power amplifier, and a speaker. The antiphase-wave muffler collects a noise signal generated from a noise source, and generates an inverted signal according to the collected noise signal, wherein a waveform of the inverted signal and a waveform of the noise signal have the same frequency, the same amplitude, and a phase difference of 180°. After combining the noise signal and the inverted signal, phase cancellation occurs to ideally realize an almost silent state since the signals have the same frequency, inverted phases and approximate power levels, thereby achieving noise reduction. The antiphase-wave muffler actively reduces noise, improves living quality, has a low cost, is easily implemented, facilitates promotion, and has an advantageous application value.
Description
本发明属于噪声处理技术领域，尤其涉及一种消音器。The invention belongs to the technical field of noise processing, and in particular relates to a silencer.
噪声泛指人们不需要的、有害的声音。噪声污染、水污染和空气污染，是世界的三大公害。噪声大体可分为：交通噪声、工业噪声、生活噪声和其他噪声。装修噪音，新楼或者旧楼装修时，拆墙砖、打墙孔等都会带来一系列的噪音，弄得左邻右舍不得安宁。Noise refers to unwanted, unwanted sounds. Noise pollution, water pollution and air pollution are the three major public hazards in the world. Noise can be roughly divided into: traffic noise, industrial noise, living noise and other noise. When decorating noise, new buildings or old buildings, wall-breaking bricks, wall-holes, etc. will bring a series of noises, making the neighbors reluctant to be peaceful.
噪声对人类带来的危害是非常大的。研究表明，50分贝左右的噪声会影响休息和睡眠，进而影响到人体正常的生理功能。噪声能引发多种疾病，因此人们把噪声称为无形杀手。它的损害以神经系统症状最明显，会出现头晕、头痛、失眠、易疲劳、爱激动、记忆力衰退、注意力不集中等症状，并伴有耳鸣、听力减退。许多证据表明，噪声还是造成心脏病和高血压的重要原因。The harm that noise poses to humans is very large. Studies have shown that about 50 decibels of noise can affect rest and sleep, which in turn affects the normal physiological functions of the human body. Noise can cause a variety of diseases, so people call noise invisible killers. Its damage is most obvious with neurological symptoms, such as dizziness, headache, insomnia, fatigue, aversion, memory loss, inattention and other symptoms, accompanied by tinnitus and hearing loss. There is a lot of evidence that noise is still an important cause of heart disease and high blood pressure.
发明内容Summary of the invention
为了解决现有技术中问题，本发明提供了一种反波消音器，能够主动降低噪音，提升生活质量。本发明通过如下技术方案实现：In order to solve the problems in the prior art, the present invention provides an anti-wave silencer capable of actively reducing noise and improving quality of life. The invention is achieved by the following technical solutions:
一种反波消音器，包括噪声采集器、数据处理器、功放机及喇叭；所述噪声采集器用于采集噪声信号，并输入到所述数据处理器；所述数据处理器用于对所述噪声信号的频率、相位、功率进行分析，然后产生与所述噪声信号频率相同、相位相反、功率接近的主动降噪反波信号；所述功放机及喇叭用于将所述主动降噪反波信号输出。An anti-wave muffler comprising a noise collector, a data processor, a power amplifier and a speaker; the noise collector is configured to collect a noise signal and input to the data processor; the data processor is configured to The frequency, phase, and power of the signal are analyzed, and then an active noise reduction echo signal having the same frequency, opposite phase, and power close to the noise signal is generated; the power amplifier and the horn are used to transmit the active noise reduction signal Output.
作为本发明的进一步改进，所述反波消音器还包括供电电路。As a further improvement of the present invention, the anti-wave muffler further includes a power supply circuit.
作为本发明的进一步改进，所述供电电路的电源为为高储能的锂电池。As a further improvement of the present invention, the power supply of the power supply circuit is a lithium battery that is high in energy storage.
作为本发明的进一步改进，所述数据处理器为微控制器MCU。As a further improvement of the present invention, the data processor is a microcontroller MCU.
本发明的有益效果是：本发明的反波消音器采集噪声声源产生的噪声信号，并根据所采集的噪声信号产生反相信号，反相信号的波形与噪声信号的波形的频率相同、幅度相同、相位相差180°，当噪声
信号与反相信号叠加后，因其频率相同、相位相反、功率接近，因此正负抵消，理想状态下，接近于无声状态，从而达到降噪的目的。本发明的反波消音器能够主动降低噪音，提升生活质量，其成本低，实现方式简单，便于推广，具有很好的应用价值。The invention has the beneficial effects that the anti-wave muffler of the invention collects the noise signal generated by the noise sound source, and generates an inverted signal according to the collected noise signal, and the waveform of the inverted signal has the same frequency and amplitude as the waveform of the noise signal. Same, phase difference 180°, when noise
After superimposing the signal and the inverted signal, because the frequency is the same, the phase is opposite, and the power is close, the positive and negative cancel, and ideally, close to the silent state, thereby achieving the purpose of noise reduction. The anti-wave muffler of the invention can actively reduce noise and improve the quality of life, has the advantages of low cost, simple implementation, convenient promotion and good application value.
图1是噪声的波形图；Figure 1 is a waveform diagram of noise;
图2是噪声的反相波形图；Figure 2 is an inverted waveform diagram of noise;
图3是本发明的反波消音器的原理图；Figure 3 is a schematic diagram of the anti-wave muffler of the present invention;
图4是本发明的反波消音器的噪声采集电路图；4 is a circuit diagram of noise collection of the anti-wave muffler of the present invention;
图5是本发明的反波消音器的数据处理电路图；Figure 5 is a data processing circuit diagram of the anti-wave muffler of the present invention;
图6是本发明的反波消音器的反波输出电路图；Figure 6 is a circuit diagram of a reverse wave output of the anti-wave muffler of the present invention;
图7是本发明的反波消音器的供电电路图。Fig. 7 is a power supply circuit diagram of the anti-wave muffler of the present invention.
下面结合附图说明及具体实施方式对本发明进一步说明。The invention will now be further described with reference to the drawings and specific embodiments.
本发明的反波消音器采集噪声生源产生的噪声信号，噪声信号如附图1所示，并根据所采集的噪声信号产生如附图2所示的反相信号，反相信号的波形与噪声信号的波形的频率相同、幅度相同、相位相差180°，当噪声信号与反相信号叠加后，因其频率相同、相位相反、功率接近，因此正负抵消，如附图3所示，理想状态下，接近于无声状态，从而达到降噪的目的。The anti-wave muffler of the present invention collects a noise signal generated by a noise source, and the noise signal is as shown in FIG. 1, and generates an inverted signal as shown in FIG. 2 according to the collected noise signal, and the waveform and noise of the inverted signal. The waveforms of the signals have the same frequency, the same amplitude, and the phases are 180° out of phase. When the noise signal is superimposed on the inverted signal, the frequency is the same, the phase is opposite, and the power is close. Therefore, the positive and negative cancel, as shown in Figure 3, the ideal state. Down, close to the silent state, thus achieving the purpose of noise reduction.
本发明的反波消音器包括：噪声采集器、数据处理器、功放机及喇叭。所述噪声采集器采集到噪声信号后，输入到数据处理器。所述数据处理器对所述噪声信号的频率、相位、功率进行分析，然后产生与所述噪声信号频率相同、相位相反、功率接近的主动降噪反波信号。所述功放机及喇叭将所述主动降噪反波信号输出。The anti-wave muffler of the present invention comprises: a noise collector, a data processor, a power amplifier and a speaker. After collecting the noise signal, the noise collector inputs to the data processor. The data processor analyzes the frequency, phase, and power of the noise signal, and then generates an active noise reduction echo signal having the same frequency, opposite phase, and close power as the noise signal. The power amplifier and the speaker output the active noise reduction back wave signal.
如附图4所示，本发明的反波消音器的噪声采集电路，包括麦克风和运算放大器电路以及附属的电容和电阻。数据处理器采用微控制单元MCU，如附图5所示，MCU接收噪声采集电路输出的噪声信号(signal1)，经过分析处理后输入主动降噪反波信号(ctrl)。反波输
出电路如附图6所示，其包括电阻、三极管、功放机和喇叭，主动降噪反波信号(ctrl)驱动三极管打开功放机后通过喇叭输入到外界环境中。As shown in FIG. 4, the noise collecting circuit of the anti-wave muffler of the present invention includes a microphone and an operational amplifier circuit and an auxiliary capacitor and resistor. The data processor adopts a micro control unit MCU. As shown in FIG. 5, the MCU receives the noise signal (signal1) output by the noise collecting circuit, and inputs an active noise reduction back signal (ctrl) after the analysis and processing. Inverse wave
As shown in FIG. 6, the circuit includes a resistor, a triode, a power amplifier and a horn. The active noise reduction echo signal (ctrl) drives the triode to turn on the power amplifier and input it into the external environment through the horn.
本发明的反波消音器能够主动降低噪音，提升生活质量，其成本低，实现方式简单，便于推广，具有很好的应用价值。The anti-wave muffler of the invention can actively reduce noise and improve the quality of life, has the advantages of low cost, simple implementation, convenient promotion and good application value.
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本发明的保护范围。
The above is a further detailed description of the present invention in connection with the specific preferred embodiments, and the specific embodiments of the present invention are not limited to the description. It will be apparent to those skilled in the art that the present invention may be made without departing from the spirit and scope of the invention.
Claims (4)
- 一种反波消音器，其特征在于：所示反波消音器包括噪声采集器、数据处理器、功放机及喇叭；所述噪声采集器用于采集噪声信号，并输入到所述数据处理器；所述数据处理器用于对所述噪声信号的频率、相位、功率进行分析，然后产生与所述噪声信号频率相同、相位相反、功率接近的主动降噪反波信号；所述功放机及喇叭用于将所述主动降噪反波信号输出。An anti-wave muffler, characterized in that: the reflected wave muffler comprises a noise collector, a data processor, a power amplifier and a speaker; the noise collector is configured to collect a noise signal and input to the data processor; The data processor is configured to analyze the frequency, phase, and power of the noise signal, and then generate an active noise reduction echo signal having the same frequency, opposite phase, and close power as the noise signal; the power amplifier and the speaker And outputting the active noise reduction back wave signal.
- 根据权利要求1所述的反波消音器，其特征在于：所述反波消音器还包括供电电路。The anti-wave muffler of claim 1 wherein said anti-wave muffler further comprises a power supply circuit.
- 根据权利要求2所述的反波消音器，其特征在于：所述供电电路的电源为高储能的锂电池。The anti-wave muffler according to claim 2, wherein the power supply of the power supply circuit is a lithium battery with high energy storage.
- 根据权利要求1所述的反波消音器，其特征在于：所述数据处理器为微控制器MCU。 The anti-wave muffler of claim 1 wherein said data processor is a microcontroller MCU.
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| PCT/CN2015/087585 WO2017028291A1 (en) | 2015-08-20 | 2015-08-20 | Antiphase-wave muffler |
| CN201580000913.6A CN106796778A (en) | 2015-08-20 | 2015-08-20 | Anti- ripple muffler |
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| CN108721742A (en) * | 2018-06-13 | 2018-11-02 | 四川大爱科技有限公司 | A kind of microparticle noise reduction atomising device |
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| US20030052807A1 (en) * | 2001-09-14 | 2003-03-20 | Tsuei-Chi Yeh | Noise cancellation apparatus and method |
| CN101211558A (en) * | 2006-12-28 | 2008-07-02 | 海尔集团公司 | Active noise reduction method and device |
| CN101246684A (en) * | 2007-02-14 | 2008-08-20 | 华信精密股份有限公司 | Electric system for actively eliminating noise |
| CN103077703A (en) * | 2012-12-25 | 2013-05-01 | 桂林电子科技大学 | Method and device for inhibiting dynamic noise |
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2015
- 2015-08-20 CN CN201580000913.6A patent/CN106796778A/en active Pending
- 2015-08-20 WO PCT/CN2015/087585 patent/WO2017028291A1/en active Application Filing
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| US20030052807A1 (en) * | 2001-09-14 | 2003-03-20 | Tsuei-Chi Yeh | Noise cancellation apparatus and method |
| CN101211558A (en) * | 2006-12-28 | 2008-07-02 | 海尔集团公司 | Active noise reduction method and device |
| CN101246684A (en) * | 2007-02-14 | 2008-08-20 | 华信精密股份有限公司 | Electric system for actively eliminating noise |
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| CN108721742A (en) * | 2018-06-13 | 2018-11-02 | 四川大爱科技有限公司 | A kind of microparticle noise reduction atomising device |
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