CN113421566A - Portable voice noise reduction device based on wind noise - Google Patents
Portable voice noise reduction device based on wind noise Download PDFInfo
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- CN113421566A CN113421566A CN202110957312.1A CN202110957312A CN113421566A CN 113421566 A CN113421566 A CN 113421566A CN 202110957312 A CN202110957312 A CN 202110957312A CN 113421566 A CN113421566 A CN 113421566A
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- 230000009467 reduction Effects 0.000 title claims abstract description 83
- 239000013013 elastic material Substances 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims abstract description 3
- 230000005540 biological transmission Effects 0.000 claims description 46
- 238000012545 processing Methods 0.000 claims description 28
- 239000012774 insulation material Substances 0.000 claims description 11
- 229920000742 Cotton Polymers 0.000 claims description 8
- 230000005669 field effect Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims 1
- 230000008054 signal transmission Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 125000004368 propenyl group Chemical group C(=CC)* 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000001514 detection method Methods 0.000 description 1
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- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
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- 238000002955 isolation Methods 0.000 description 1
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/22—Procedures used during a speech recognition process, e.g. man-machine dialogue
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/22—Procedures used during a speech recognition process, e.g. man-machine dialogue
- G10L2015/223—Execution procedure of a spoken command
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- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
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- Acoustics & Sound (AREA)
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- Quality & Reliability (AREA)
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Abstract
The invention relates to the technical field of signal transmission noise reduction, in particular to a portable voice noise reduction device based on wind noise, which comprises a limiting fixed block, a guide sliding rail and a noise reduction assembly, wherein the limiting fixed block is arranged on the guide sliding rail; a identification rate that is used for the tight location of mobile device clamp spacing fixed block is the U type and just comprises elastic material, the guide slide rail that is used for the mobile device guide is seted up to the symmetry on the spacing fixed block inner peripheral surface, the inside noise reduction subassembly that is used for outdoor wind sound noise reduction that inlays of spacing fixed block, the noise reduction subassembly is located between the guide slide rail, the setting of noise reduction subassembly can improve outdoor sound because the wind-force interference problem that causes is blown of wind, can guarantee the control of sound order to smart machine simultaneously.
Description
Technical Field
The invention relates to the technical field of signal transmission noise reduction, in particular to a portable voice noise reduction device based on wind noise.
Background
Noise reduction devices commonly use mufflers in the prior art, which means that for airflow pipelines with noise propagation, noise in the pipelines can be attenuated or reflected back by using noise reduction devices such as pipelines and elbows with acoustic liners or pipelines with suddenly changed cross-sectional areas and other discontinuous acoustic impedances. The former is called resistive muffler, the latter is called reactive muffler, and there are also impedance compound mufflers.
Among the prior art, when carrying out the noise reduction, adopt the mode of amortization usually, it is common to have a muffler, but when the muffler used the speech control field, can appear promptly because the structure is comparatively complicated therefore the adaptation of the small-size communication equipment of very good adaptation and signal noise ground reduce, prior art does not have fine solution in this aspect simultaneously.
Disclosure of Invention
The invention aims to provide a portable voice noise reduction device based on wind noise, and solves the problems that in the prior art, mobile small-sized communication equipment is poor in outdoor sound collection effect and noise is easy to occur.
The purpose of the invention is realized by the following technical scheme that the device comprises a limiting fixed block, a guide sliding rail and a noise reduction assembly; the limiting fixing block for clamping and positioning the mobile equipment is U-shaped and is made of elastic materials, guide sliding rails for guiding the mobile equipment are symmetrically arranged on the inner circumferential surface of the limiting fixing block, a noise reduction assembly for reducing outdoor wind noise is embedded in the limiting fixing block, and the noise reduction assembly is located between the guide sliding rails.
It should be noted that, set up spacing fixed block and noise reduction subassembly in this scheme, wherein noise reduction subassembly is used for carrying out the processing of environment noise to the sound of external receipt, also can carry out the elimination of tiny sound frequency interference simultaneously, specifically does: after external sound at first through preprocessing for the first time, can leading-in to the noise reduction subassembly in, the noise reduction subassembly carries out relevant noise reduction operation according to its inside corresponding module that sets up or original paper, and the spacing fixed block of special setting can closely be fixed to removing small-size equipment simultaneously, and the final effect of fixed form does not influence and carries for the connected mode of cell-phone shell.
The noise reduction assembly comprises a loudspeaking module, a primary noise reduction processing module, a radio receiving module and a secondary noise reduction processing module; the speaker module with be provided with the module of making an uproar between the radio module, the module of making an uproar is inlayed at the inner interval and is equipped with and is used for the noise processing one-level noise reduction processing module with strengthen the noise processing the second grade noise reduction processing module.
It should be noted that under the combined action of the loudspeaking module, the primary noise reduction processing module, the radio receiving module and the secondary noise reduction processing module in the scheme, the incoming sound is transmitted into the outside to be processed, and when the sound is transmitted into the intelligent device, the sound can be clear and complete.
The noise reduction assembly is characterized in that a sound transmission cavity for collecting and transmitting sound is fixedly connected to the noise reduction assembly, one side of the sound transmission cavity is connected with a plurality of sound transmission holes for transmitting the sound, sound emitting holes for emitting the sound of the mobile device are arranged beside the plurality of sound transmission holes at intervals, and the sound emitting holes are made of elastic materials.
It should be noted that, the sound transmission can be guaranteed to the setting of biography sound chamber, places sound in a direction chamber, forms with the vibration environment that current paper cup passes sound the same, guarantees a steady going on of sound transmission, solves the noisy problem of sound transmission among the prior art.
And a sound guide hole is formed in the other side of the sound transmission cavity, and the sound guide hole is made of an elastic material.
The sound guide hole is provided with the elastic material, so that the vibration of the sound itself can be transmitted, and the transmission process is not distorted according to the principle that the sound is transmitted by the vibration.
And sound insulation materials for isolating external noise are laid on two sides of the inner part of the sound transmission cavity, and the laying range of the sound insulation materials is smaller than the range of the sound transmission hole.
It should be noted that laying of sound insulation material can carry out the supplementary transmission of sound when playing sound insulation, and among the prior art, sound insulation material often can carry out isolated of sound, can not carry out the utilization of transmitting, and this just leads to sound insulation material function singleness, and the sound transmission effect is relatively poor.
A plurality of sound sensors for sound gathering are uniformly distributed in the sound receiving module at intervals.
It should be noted that the sound sensor is arranged to perform an effective auxiliary aggregation effect on the external sound, so as to help the saturation and fullness of the sound transmission in the later period.
The sound sensor is characterized in that sound transmitting cotton used for transmitting sound vibration, an electret used for monitoring capacitance change, a field effect device used for sound current and voltage alternation and an external pin used for external connection are sequentially arranged inside the sound sensor from left to right.
It should be noted that the sound transmission cotton, the electret, the field effect device and the pin which are arranged in the sound sensor are used for transmitting sound to the mobile phone, wherein the sound mobile phone can be used for transmitting sound by using a microphone in the prior art, but the actual collection effect is poor, and the collection effect cannot be good.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the arrangement of the noise reduction assembly can improve the problem of wind power interference caused by blowing of outdoor sound due to wind, and meanwhile, the recognition rate of a sound command on the control of intelligent equipment can be ensured;
2. the arrangement of the limiting fixing block can ensure that the small mobile equipment can be conveniently adapted, so that the whole small mobile equipment is more convenient to carry, and the convenience of voice control is ensured;
3. the setting of sound transmission chamber can improve the definition that external sound carries out the transmission, can assist the guide that carries out sound through setting up of sound transmission chamber simultaneously.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the internal modules of the noise reduction assembly of the present invention;
FIG. 3 is a schematic view of an acoustic sensor of the present invention;
fig. 4 is a schematic view of the internal structure of the sensor of the present invention.
Illustration of the drawings: 1-limiting fixed blocks; 2-guiding the slide rail; 3-a noise reduction assembly; 31-a speaker module; 32-a primary noise reduction processing module; 33-a radio module; 331-a sound sensor; 331.1-Sound-transmitting cotton; 331.2-electret; 331.3-field effect device; 331.4-pin; 34-a secondary noise reduction processing module; 4-sound insulation material; 5-leading the sound hole; 6-a sound transmission cavity; 7-sound transmission hole; 8-sound emitting hole.
Detailed Description
Referring to the accompanying drawings for description 1 to 4, the present embodiment provides a portable voice noise reduction device based on wind noise, which is mainly used to solve the problem that the prior art mobile small-sized communication device has poor outdoor sound collection effect and is prone to noise, and the device is already in the practical experimental stage.
The embodiment specifically comprises a limiting fixed block 1, a guide sliding rail 2 and a noise reduction component 3; a spacing fixed block 1 for mobile device presss from both sides tight location is the U type and comprises elastic material, and wherein elastic material is propenyl elastomer or polyester elastic material, and these elastic material can lay at interval when setting up to guarantee can vibrate along with sound, play relevant vibration transmission effect. Guide slide rails 2 used for guiding the mobile equipment are symmetrically arranged on the inner peripheral surface of the limiting fixed block 1, a noise reduction assembly 3 used for reducing outdoor wind noise is embedded in the limiting fixed block 1, and the noise reduction assembly 3 is located between the guide slide rails 2.
The noise reduction component 3 comprises a loudspeaker module 31, a primary noise reduction processing module 32, a radio receiving module 33 and a secondary noise reduction processing module 34; a noise reduction module is arranged between the loudspeaking module 31 and the radio module 33, and a primary noise reduction processing module 32 for noise processing and a secondary noise reduction processing module 34 for enhancing noise processing are embedded in the noise reduction module at intervals. Fixedly connected with is used for sound to collect the sound cavity 6 that transmits on the noise reduction subassembly 3, and sound cavity 6 one side is connected with a plurality of sound holes 7 that pass through that are used for the sound transmission, and a plurality of sound holes 7 are other the interval and are provided with the sound hole 8 that makes that the mobile device goes out the sound and use, and sound hole 8 is made by elastic material, and elastic material includes propenyl elastomer or polyester elastic material. The other side of the sound transmission cavity 6 is provided with a sound guide hole 5, and the sound guide hole 5 is made of an elastic material. The sound transmission cavity 6 is internally laid with sound insulation materials 4 for isolating external noise at two sides, and the laying range of the sound insulation materials 4 is smaller than that of the sound transmission hole 7. A plurality of sound sensors 331 for collecting sound are uniformly arranged in the sound receiving module 33 at intervals. The sound sensor 331 is internally provided with sound transmitting cotton 331.1 for transmitting sound vibration, an electret 331.2 for monitoring capacitance change, a field effect device 331.3 for sound current voltage alternation and an external pin 331.4 for external connection from left to right in sequence.
The specific operation process of this embodiment is as follows: firstly, a user firstly slides and connects the limit fixed block in the scheme with an external mobile device, and the external device is a mobile phone, a small-sized tablet personal computer and the like, the frame of the mobile device is attached to a guide slide rail arranged on the inner side edge of the limit fixed block, the mobile device such as the mobile phone and the like is pushed to move downwards under the drive of external force, the whole mobile device is in a telescopic moving state, then when the mobile device moves to the end of the slide rail, a corresponding noise reduction component is immediately connected and attached to a sound transmission hole part at the bottom of the mobile device, the user aligns the mouth to a sound guide hole arranged on a sound transmission cavity on the device to output speech sound, the speech sound is immediately transmitted into the sound transmission cavity after the sound instruction of the user is output, and at the same time, the sound insulation material in the sound transmission cavity can isolate external sound and simultaneously utilizes self vibration to carry out sound auxiliary transmission, because the transmission of sound is carried out by means of vibration, the vibration of the soundproof cotton can ensure the auxiliary transmission of sound.
Then sound can transmit next module in the sound transmission chamber through the sound hole, in the noise reduction module, sound can carry out the combined processing of one-level noise reduction processing module and second grade noise reduction processing module, guarantee the treatment effect of the wind noise that mix with in the sound, wherein the specific processing procedure of the noise reduction processing module of one-level and second grade does, the sound frequency with wind noise vibrates and subducts, guarantee that the different noises of frequency carry out harmonious processing in the sound, make holistic sound frequency reach a resonant effect, obtain the effect with the amplitude. After the noise reduction assembly processes the corresponding sound, the sound is further amplified, namely enters the loudspeaker module, the loudspeaker module inputs alternating current through the voice coil to generate an alternating magnetic field, and the alternating magnetic field and the permanent magnet move in a direction perpendicular to the current direction of the voice coil. The voice coil moves to drive vibration, and the vibration of the paper cone pushes the vibration of air, so that people can feel sound. The larger the alternating current is, the stronger the magnetic field action is, the larger the vibration amplitude of the loudspeaker module is, the larger the corresponding sound is prompted to be, and then the amplified sound can be clearly transmitted to the mobile equipment to carry out remote command control on the voice equipment.
Wherein after sound gets into noise reduction subassembly, can carry out the collection of sound at first, it needs to emphasize that the sound of here collection is the sound that has carried out preliminary treatment sound insulation and transmission in the sound transmission chamber, and its noise has obtained better isolation, and the sound of collecting can pass through the electret, passes under the combined action of sound cotton, field effect ware and pin, carries out the sound collection, and wherein contains the operation process of the sound sensor of above-mentioned content: the external sound can make film vibration to the electret sensitive to the sound, so as to cause the change of the capacitance, and generate a small voltage which changes correspondingly, the voltage is converted into a smaller voltage, the smaller voltage is received by the existing data acquisition device with the model of MAX132CNG + through the A/D conversion of the prior art, and is transmitted to the computer of the center of the prior art for receiving, wherein the acoustic cotton and the field effect device can make auxiliary matching transmission, the specific transmission process and method are the same as the prior art, and the detailed description is omitted here.
The experimental results of the prior art and the present embodiment for the environmental noise reduction processing are as follows:
based on the above comparison of wind noise experimental data, the method for reducing wind noise provided by this embodiment can alleviate noise well on the basis of the prior art, and the applicant performs an evaluation test on key parameters in the field during an experimental process, where NRR is an average value of noise reduction detection, which is an average value of noise absorption coefficients of the sober measured at noise reduction indexes of 250, 500, 1000, 2000, and the like, and this value can well reflect the noise reduction situation, and the larger the value is, the better the noise reduction is, in this embodiment, the noise reduction object in the prior art is changed from the conventional device to noise to the superposition degree of wind noise and sound itself, although the original noise reduction object is changed, this improvement is performed in combination with each module, and thus the noise reduction effect is obvious.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The portable voice noise reduction device based on wind noise is characterized by comprising a limiting fixed block (1), a guide sliding rail (2) and a noise reduction assembly (3); a noise reduction subassembly (3) that is used for the tight location of mobile device clamp spacing fixed block (1) is the U type and constitutes by elastic material, guide slide rail (2) that are used for the mobile device guide are seted up to the symmetry on spacing fixed block (1) inner peripheral surface, spacing fixed block (1) inside is inlayed and is equipped with and is used for dry noise reduction subassembly (3) of outdoor wind sound reduction, noise reduction subassembly (3) are located between guide slide rail (2).
2. The portable voice noise reduction device for wind noise based on claim 1, wherein the noise reduction assembly (3) comprises a speaker module (31), a primary noise reduction processing module (32), a sound reception module (33) and a secondary noise reduction processing module (34); speaker module (31) with be provided with the module of making an uproar between radio module (33), the module of making an uproar is inlayed at the noise reduction module inner space and is equipped with and is used for the noise treatment one-level noise reduction processing module (32) and strengthen the noise treatment second grade noise reduction processing module (34).
3. The portable voice noise reduction device for wind noise based on claim 1, wherein a sound transmission cavity (6) for collecting and transmitting sound is fixedly connected to the noise reduction component (3), one side of the sound transmission cavity (6) is connected with a plurality of sound transmission holes (7) for transmitting sound, sound emission holes (8) for sound emission of the mobile device are arranged beside the plurality of sound transmission holes (7) at intervals, and the sound emission holes (8) are made of elastic materials.
4. The portable voice noise reduction device for wind noise according to claim 3, wherein a sound guide hole (5) is formed on the other side of the sound transmission cavity (6), and the material of the sound guide hole (5) is an elastic material.
5. The portable voice noise reduction device for wind noise according to claim 3, wherein sound insulation materials (4) for isolating external noise are laid on two sides inside the sound transmission cavity (6), and the laying range of the sound insulation materials (4) is smaller than the range of the sound transmission holes (7).
6. The portable voice noise reduction device for wind noise according to claim 2, wherein a plurality of sound sensors (331) for sound collection are arranged at intervals in the sound reception module (33).
7. The portable voice noise reduction device for wind noise based on claim 6 is characterized in that sound transmission cotton (331.1) for sound transmission vibration, an electret (331.2) for capacitance change monitoring, a field effect device (331.3) for sound current voltage alternation and an external pin (331.4) for external connection are arranged inside the sound sensor (331) from left to right in sequence.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110957312.1A CN113421566B (en) | 2021-08-20 | 2021-08-20 | Portable voice noise reduction device based on wind noise |
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| CN202110957312.1A CN113421566B (en) | 2021-08-20 | 2021-08-20 | Portable voice noise reduction device based on wind noise |
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