CN112782282A - Quick measuring device for insertion loss of active noise reduction foamed aluminum sound barrier - Google Patents
Quick measuring device for insertion loss of active noise reduction foamed aluminum sound barrier Download PDFInfo
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- CN112782282A CN112782282A CN202011565875.8A CN202011565875A CN112782282A CN 112782282 A CN112782282 A CN 112782282A CN 202011565875 A CN202011565875 A CN 202011565875A CN 112782282 A CN112782282 A CN 112782282A
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- 230000004888 barrier function Effects 0.000 title claims abstract description 40
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 37
- 230000009467 reduction Effects 0.000 title claims abstract description 28
- 238000003780 insertion Methods 0.000 title claims abstract description 15
- 230000037431 insertion Effects 0.000 title claims abstract description 15
- 238000005259 measurement Methods 0.000 claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 14
- 238000003491 array Methods 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 239000006260 foam Substances 0.000 claims abstract description 4
- 230000007613 environmental effect Effects 0.000 claims description 17
- 230000003472 neutralizing effect Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/11—Analysing solids by measuring attenuation of acoustic waves
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Immunology (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Acoustics & Sound (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a device for rapidly measuring insertion loss of an active noise reduction foam aluminum sound barrier, and relates to the technical field of noise reduction sound barriers. The invention comprises a sound source device, a noise detector, a foamed aluminum sound barrier and a sample to be detected; the sound source device comprises a degradable noise source with fourteen microphones, a sound pick-up, a processing core and an electromagnetic wave emitter; the noise detector is arranged at one end of the foamed aluminum sound barrier and the sound source device; a digital noise reduction software engine is arranged in the noise detector; a plurality of microphone arrays for active noise reduction are arranged in the noise detection device; the sample to be detected comprises a foamed aluminum sound barrier and a fixing device thereof. By adopting the active noise reduction technology, the accuracy of the production field measurement of the insertion loss of the foamed aluminum sound barrier is greatly improved, the production parameters and the process of the foamed aluminum sound barrier are adjusted in time and pertinently, the production efficiency of the foamed aluminum sound barrier is improved, and the production cost is reduced.
Description
Technical Field
The invention belongs to the technical field of noise reduction barriers, and particularly relates to an active noise reduction quick measurement device for insertion loss of a foamed aluminum noise barrier.
Background
With the rapid development and healthy operation of the expressway, the construction of the expressway network in China is basically formed. The highway facilitates ground traffic, drives regional economy, and simultaneously brings about the problem of noise pollution in urban and rural areas along with the continuous construction and traffic increase of the highway. The traffic noise pollution problem is becoming more serious nowadays and becomes a non-negligible problem in road traffic. The sound barrier has become an important measure and technical research direction for governing traffic noise at home and abroad at present by virtue of the advantages of obvious noise reduction effect, flexible and convenient building and processing, land saving, strong environmental adaptability and the like.
The foamed aluminum sound barrier has light weight, high strength, high rigidity and good water resistance and corrosion resistance, and has been widely applied to road noise reduction barriers at home and abroad. The foamed aluminum sound barrier is internally formed by mutually communicating a plurality of reticular pores, and the sound waves are transmitted to vibrate through a plurality of pores after being emitted, and the sound energy is converted into heat energy under the friction and viscosity action of the foamed aluminum, so that the sound absorption and noise reduction effects are achieved. The pore size and the plate thickness inside the aluminum foam sound barrier are directly related to the insertion loss of the later aluminum foam sound barrier. In the prior art, background noise is not processed during field measurement, so that measurement data is not accurate enough, and the correlation of the foamed aluminum sound barrier cannot be adjusted in a targeted manner.
In view of the above problems, the present application provides an active noise reduction device for rapidly measuring the insertion loss of a foamed aluminum sound barrier, which can reduce the environmental noise with high precision.
Disclosure of Invention
The invention aims to provide an active noise reduction quick measurement device for the insertion loss of a foamed aluminum sound barrier, which collects environmental noise by constructing a degradable noise source with fourteen microphone arrays, carries out operation processing on signals by a built-in chip algorithm, and simultaneously carries out neutralization processing on external noise when playing a sound source, thereby solving the problem of inaccurate measurement data caused by not processing background noise in the existing foamed aluminum sound barrier generation process.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a device for rapidly measuring the insertion loss of an active noise reduction foamed aluminum sound barrier, which comprises a sound source device, a noise detector, a foamed aluminum sound barrier and a sample to be detected;
the sound source device comprises a degradable noise source with fourteen loudspeakers and seven microphones, a sound pick-up, a processing core and an electromagnetic wave emitter;
the noise detector is arranged at one end of the foamed aluminum sound barrier and the sound source device; a digital noise reduction software engine is arranged in the noise detector; a plurality of microphone arrays for active noise reduction are arranged in the noise detection device;
the sample to be detected comprises a foamed aluminum sound barrier and a fixing device thereof.
Preferably, a chip algorithm is built in the processing chip, and the algorithm parallels the signal into the sound source signal.
Preferably, the fourteen loudspeakers and seven microphones of the degradable noise source are divided into seven loudspeakers at the upper part for playing the measurement, seven microphones at the middle part for recording the environmental noise in real time, and seven loudspeakers at the lower part for neutralizing the background noise; the seven loudspeakers used for playing the measurement, the seven loudspeakers used for neutralizing the background noise and the seven acquisition devices used for recording the ambient noise microphones are distributed in an array.
Preferably, when the seven microphones for real-time recording the environmental noise record the environmental noise, the recorded sound is filtered by the designed feedforward filter and the phase is reversed by 180 degrees, and then is played by the following seven loudspeakers to neutralize the background noise.
Preferably, the electromagnetic wave transmitter is used for encrypting sound waves, collecting the sound waves through a microphone array for receiving noise, and performing data processing with a receiver for receiving the electromagnetic waves.
Preferably, the environmental noise collecting device of the degradable noise source is internally provided with a voice recognition system, and is used for extracting voice input from the environmental noise and positioning the background noise of the environmental background.
The invention has the following beneficial effects:
(1) the invention adopts an active noise reduction technology, greatly improves the accuracy of the measurement of the insertion loss production site of the foamed aluminum sound barrier, further timely and pertinently adjusts the production parameters and the process of the foamed aluminum sound barrier, improves the production efficiency of the foamed aluminum sound barrier and reduces the production cost.
(2) The invention extracts the voice recognition system through the microphone array arranged in the sound source and noise detector, reduces a large amount of noise, multipath reflection and reverberation in the real environment, greatly improves the signal pickup quality, can position the related noise source and prepares for the later-stage measurement environment.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an active noise reduction foamed aluminum sound barrier insertion loss rapid measurement device according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention is an active noise reduction apparatus for rapidly measuring insertion loss of a foamed aluminum sound barrier, including a sound source device, a noise detector, a foamed aluminum sound barrier, and a sample to be tested;
the sound source device comprises a degradable noise source with fourteen microphones, a sound pick-up, a processing core and an electromagnetic wave emitter;
the noise detector is arranged at one end of the foamed aluminum sound barrier and the sound source device; a digital noise reduction software engine is arranged in the noise detector; seven microphone arrays for active noise reduction are installed in the noise detection device;
the sample to be detected comprises a foamed aluminum sound barrier and a fixing device thereof.
The processing chip is internally provided with a chip algorithm, the algorithm parallels the signal to the sound source signal, a designer performs acoustic analysis on the noise which possibly occurs, and the same algorithm is established according to the frequency, phase and amplitude change of the noise which possibly propagates to the noise detector.
Wherein, fourteen loudspeakers and seven microphones which can reduce noise sources are divided into seven sound sources for playing measurement, seven loudspeakers for neutralizing environmental noise and seven microphones for recording environmental noise in real time; seven microphones for playing measurement, seven loudspeakers for neutralizing ambient noise and seven microphone collecting devices for receiving ambient noise are distributed in an array, because the separation of each sound source is realized, and the signals received by a single microphone are superposed by a plurality of sound sources, the separation of each sound source is difficult to realize. Thus, sound source positioning and separation cannot be realized, superposition of a class of sound is not noise, but the superposition of the class of sound is also inhibited in speech recognition, namely interference of human voice, and a microphone array consisting of 7 microphones carried by a noise detector can well solve the problems.
The electromagnetic wave transmitter is used for encrypting sound waves, collecting the sound waves through a microphone array for receiving noise, and processing data with a receiver for receiving the electromagnetic waves.
Wherein, the single microphone system can obtain sound signals under the conditions of low noise, no reverberation and close distance to a sound source; however, if the sound source is far from the microphone and a large amount of noise, multipath reflection and reverberation exist in the real environment, the quality of the picked-up signal is reduced, which may seriously affect the accuracy of noise detection, and the voice recognition system is built in the environmental noise collection device capable of reducing the noise source, and is used to extract the voice input from the environmental noise and locate the background noise of the environmental background.
It should be noted that, in the above system embodiment, each included unit is only divided according to functional logic, but is not limited to the above division as long as the corresponding function can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
In addition, it is understood by those skilled in the art that all or part of the steps in the method for implementing the embodiments described above may be implemented by a program instructing associated hardware, and the corresponding program may be stored in a computer-readable storage medium.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. A quick measurement device for insertion loss of an active noise reduction foamed aluminum sound barrier is characterized by comprising a sound source device, a noise detector, the foamed aluminum sound barrier and a sample to be detected;
the sound source device comprises a degradable noise source with fourteen loudspeakers and seven microphones, a sound pick-up, a processing core and an electromagnetic wave emitter;
the noise detector is arranged at one end of the foamed aluminum sound barrier and the sound source device; a digital noise reduction software engine is arranged in the noise detector; a plurality of microphone arrays for active noise reduction are arranged in the noise detection device;
the sample to be detected comprises a foamed aluminum sound barrier and a fixing device thereof.
2. The device of claim 1, wherein a chip algorithm is built in the processing chip, and the algorithm parallels the signal to the sound source signal.
3. The apparatus for rapidly measuring the insertion loss of an active noise reduction foam aluminum sound barrier according to claim 1, wherein the fourteen speakers and seven microphones capable of reducing noise sources are divided into seven speakers at the upper part for playing the speakers during measurement, seven microphones at the middle part for recording the environmental noise in real time, and seven speakers at the lower part for neutralizing the background noise; the seven loudspeakers used for playing the measurement, the seven loudspeakers used for neutralizing the background noise and the seven acquisition devices used for recording the ambient noise microphones are distributed in an array.
4. The apparatus of claim 3, wherein the central seven microphones for real-time recording of environmental noise record environmental noise, and the recorded sound is filtered and phase-inverted by 180 degrees by the designed feedforward filter, and then played by the next seven loudspeakers to neutralize the background noise.
5. The device of claim 1, wherein the electromagnetic wave transmitter is used for encrypting sound waves, collecting the sound waves through a microphone array for receiving noise, and performing data processing with a receiver for receiving electromagnetic waves.
6. The apparatus for rapidly measuring insertion loss of an active noise reduction foamed aluminum sound barrier according to claim 1 or 3, wherein the noise reduction source environment noise collecting apparatus is provided with a speech recognition system inside, and is used for extracting speech input from environment noise and locating background noise of environment background.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011565875.8A CN112782282A (en) | 2020-12-25 | 2020-12-25 | Quick measuring device for insertion loss of active noise reduction foamed aluminum sound barrier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011565875.8A CN112782282A (en) | 2020-12-25 | 2020-12-25 | Quick measuring device for insertion loss of active noise reduction foamed aluminum sound barrier |
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| CN112782282A true CN112782282A (en) | 2021-05-11 |
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| CN202011565875.8A Pending CN112782282A (en) | 2020-12-25 | 2020-12-25 | Quick measuring device for insertion loss of active noise reduction foamed aluminum sound barrier |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005283971A (en) * | 2004-03-30 | 2005-10-13 | Japan Science & Technology Agency | Active noise controller for sound insulation wall |
| CN1712952A (en) * | 2004-06-21 | 2005-12-28 | 卡库斯蒂克斯技术中心股份有限公司 | Test stand and method for measuring sound insulation or insertion loss on a test object |
| JP2006097350A (en) * | 2004-09-29 | 2006-04-13 | Mitsubishi Heavy Ind Ltd | Silencer, sound barrier, and silencing method |
| JP2010107884A (en) * | 2008-10-31 | 2010-05-13 | Yamaha Corp | Unit for forming virtual noise barrier and microphone speaker unit |
| CN102708267A (en) * | 2012-06-18 | 2012-10-03 | 铁道第三勘察设计院集团有限公司 | High speed railway sound barrier insertion loss calculation method |
| CN103335709A (en) * | 2013-06-26 | 2013-10-02 | 中山大学 | Outdoor measuring method for sound barrier transition area diffraction attenuation based on directional sound source |
| CN107401128A (en) * | 2017-09-14 | 2017-11-28 | 苏州大学 | Interference noise reducing device at the top of sound barrier |
| CN109958071A (en) * | 2019-03-08 | 2019-07-02 | 上海建工集团股份有限公司 | A kind of sound barrier and its application method |
| US20200211527A1 (en) * | 2019-01-02 | 2020-07-02 | The Hong Kong University Of Science And Technology | Low Frequency Acoustic Absorption and Soft Boundary Effect with Frequency-Discretized Active Panels |
| CN112030799A (en) * | 2020-09-28 | 2020-12-04 | 华东交通大学 | Sound barrier of active noise reduction and collection device and working method thereof |
-
2020
- 2020-12-25 CN CN202011565875.8A patent/CN112782282A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005283971A (en) * | 2004-03-30 | 2005-10-13 | Japan Science & Technology Agency | Active noise controller for sound insulation wall |
| CN1712952A (en) * | 2004-06-21 | 2005-12-28 | 卡库斯蒂克斯技术中心股份有限公司 | Test stand and method for measuring sound insulation or insertion loss on a test object |
| JP2006097350A (en) * | 2004-09-29 | 2006-04-13 | Mitsubishi Heavy Ind Ltd | Silencer, sound barrier, and silencing method |
| JP2010107884A (en) * | 2008-10-31 | 2010-05-13 | Yamaha Corp | Unit for forming virtual noise barrier and microphone speaker unit |
| CN102708267A (en) * | 2012-06-18 | 2012-10-03 | 铁道第三勘察设计院集团有限公司 | High speed railway sound barrier insertion loss calculation method |
| CN103335709A (en) * | 2013-06-26 | 2013-10-02 | 中山大学 | Outdoor measuring method for sound barrier transition area diffraction attenuation based on directional sound source |
| CN107401128A (en) * | 2017-09-14 | 2017-11-28 | 苏州大学 | Interference noise reducing device at the top of sound barrier |
| US20200211527A1 (en) * | 2019-01-02 | 2020-07-02 | The Hong Kong University Of Science And Technology | Low Frequency Acoustic Absorption and Soft Boundary Effect with Frequency-Discretized Active Panels |
| CN109958071A (en) * | 2019-03-08 | 2019-07-02 | 上海建工集团股份有限公司 | A kind of sound barrier and its application method |
| CN112030799A (en) * | 2020-09-28 | 2020-12-04 | 华东交通大学 | Sound barrier of active noise reduction and collection device and working method thereof |
Non-Patent Citations (1)
| Title |
|---|
| F. KOUSSA等: ""Acoustic performance of gabions noise barriers: Numerical and experimental approaches"", 《APPLIED ACOUSTICS》 * |
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Application publication date: 20210511 |