CN109166567A - A kind of noise-reduction method and equipment - Google Patents
A kind of noise-reduction method and equipment Download PDFInfo
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- CN109166567A CN109166567A CN201811174038.5A CN201811174038A CN109166567A CN 109166567 A CN109166567 A CN 109166567A CN 201811174038 A CN201811174038 A CN 201811174038A CN 109166567 A CN109166567 A CN 109166567A
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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
- G10K11/1781—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 characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17821—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 characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
- G10K11/17823—Reference signals, e.g. ambient acoustic environment
-
- 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
Abstract
The present invention is suitable for noise control technique field, provides a kind of noise-reduction method and equipment, this method comprises the following steps: the noise in S1, real-time collecting environment；S2, the noise frequency for filtering out maximum loudness；Whether S3, the loudness for detecting maximum loudness noise exceed loudness threshold；If S4, testing result be it is yes, generate inhibit maximum loudness noise neutralization noise.Noise-reduction method provided by the invention achievees the purpose that reduce the noise in environment by neutralizing the noise of maximum loudness for the middle noise of π with the spectral phase difference of maximum loudness noise.
Description
Technical field
The invention belongs to noise control technique field, a kind of noise-reduction method and equipment are provided.
Background technique
The harm of noise on human body be it is systemic, can both cause the variation of auditory system, can also be to non-sense of hearing system
System has an impact.These early stages influenced are mainly that physiology sexually revises, and Long Term Contact can cause pathology than stronger noise
It sexually revises.For staying in the people by noise effect place for a long time such as curbside or track for a train side, it is therefore desirable to a kind of reduction
The method of environmental noise.
Summary of the invention
The embodiment of the present invention provides a kind of noise-reduction method, it is intended to the noise reduced in environment.
The invention is realized in this way a kind of noise-reduction method, this method comprises the following steps:
Noise in S1, real-time collecting environment；
S2, the noise frequency for filtering out maximum loudness；
Whether S3, the loudness for detecting maximum loudness noise exceed loudness threshold；
If S4, testing result be it is yes, generate inhibit maximum loudness noise neutralization noise.
Further, the step S2 specifically comprises the following steps:
The decibel of S21, the noise based on different frequency and corresponding noise assess the loudness of each frequency noise；
S22, the maximum noise frequency of loudness is determined.
Further, the phase difference of the spectral phase of the spectral phase for neutralizing noise and maximum loudness noise is π.
Further, before step S2 further include:
S5, rejecting human ear can not perceive the noise of frequency range.
The invention is realized in this way a kind of noise reducing apparatus, the equipment include:
It is sequentially connected noise collector unit, noise screening unit, comparing unit and noise neutralisation unit；
Wherein, noise collector unit, for collecting the noise in environment；
Noise screening unit screens the frequency noise of most loudness；
The loudness of maximum loudness noise is compared by comparing unit with loudness threshold；
When the loudness of maximum loudness noise is greater than noise threshold, then noise neutralisation unit is raw inhibits in maximum loudness noise
And noise.
Further, the phase difference of the spectral phase of the spectral phase for neutralizing noise and maximum loudness noise is π.
Further, the noise screening unit includes:
The decibel of loudness evaluation module, noise and corresponding noise based on different frequency assesses the loudness of each frequency noise；
Maximum loudness determining module determines the maximum noise frequency of loudness.
Further, noise reducing apparatus further include:
Culling unit, the noise of frequency range can not be perceived by rejecting human ear.
Noise-reduction method provided by the invention is by ringing maximum for the middle noise of π with the spectral phase difference of maximum loudness noise
The noise of degree is neutralized, and achievees the purpose that reduce the noise in environment.
Detailed description of the invention
Fig. 1 is noise-reduction method flow chart provided in an embodiment of the present invention；
Fig. 2 is noise reducing apparatus structural schematic diagram provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 1 is noise-reduction method flow chart provided in an embodiment of the present invention, and this method comprises the following steps:
Noise in S1, real-time collecting environment,
S2, the noise frequency for filtering out maximum loudness；
In embodiments of the present invention, the noise for filtering out maximum loudness specifically comprises the following steps:
The decibel of S21, the noise based on different frequency and corresponding noise assess the loudness of each frequency noise；
S22, the maximum noise frequency of loudness is determined.
S3, detect maximum loudness noise loudness whether exceed loudness threshold, if testing result be it is yes, then follow the steps
S4, if testing result be it is no, do nothing；
S4, the neutralization noise for inhibiting maximum loudness noise is generated.
In embodiments of the present invention, the phase of the spectral phase and the spectral phase of maximum loudness noise of the neutralization noise of generation
Potential difference is π.
In embodiments of the present invention, before step S2 further include:
S5, rejecting human ear can not perceive the noise of frequency range, and the frequency range that human ear can generally perceive arrives for 20Hz
20000Hz is higher than 20000Hz for frequency and lower than the sound of 20Hz, human ear can not generally be perceived, therefore reject from noise
Frequency is higher than 20000Hz and the noise lower than 20Hz.
Noise-reduction method provided by the invention is by ringing maximum for the middle noise of π with the spectral phase difference of maximum loudness noise
The noise of degree is neutralized, and achievees the purpose that reduce the noise in environment.
Fig. 2 is that noise reducing apparatus structural schematic diagram provided in an embodiment of the present invention is only illustrated in the present invention for ease of description
The relevant part of embodiment, the equipment include:
It is sequentially connected noise collector unit, noise screening unit, comparing unit and noise neutralisation unit；
Wherein, noise collector unit, for collecting the noise in environment；
Noise screening unit screens the frequency noise of most loudness；
The loudness of maximum loudness noise is compared by comparing unit with loudness threshold；
When the loudness of maximum loudness noise is greater than noise threshold, then noise neutralisation unit is raw inhibits in maximum loudness noise
And noise, the phase difference that noise neutralisation unit generates the spectral phase of the spectral phase and maximum loudness noise that neutralize noise is π.
In embodiments of the present invention, noise screening unit includes:
The decibel of loudness evaluation module, noise and corresponding noise based on different frequency assesses the loudness of each frequency noise；
Maximum loudness determining module determines the maximum noise frequency of loudness.
In embodiments of the present invention, the noise reducing apparatus further include:
Culling unit, the noise of frequency range can not be perceived by rejecting human ear, and the frequency range that human ear can generally perceive arrives for 20Hz
20000Hz is higher than 20000Hz for frequency and lower than the sound of 20Hz, human ear can not generally be perceived, therefore reject from noise
Frequency is higher than 20000Hz and the noise lower than 20Hz
Noise reducing apparatus provided by the invention is by ringing maximum for the middle noise of π with the spectral phase difference of maximum loudness noise
The noise of degree is neutralized, and achievees the purpose that reduce the noise in environment.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (8)
1. a kind of noise-reduction method, which is characterized in that described method includes following steps:
Noise in S1, real-time collecting environment；
S2, the noise frequency for filtering out maximum loudness；
Whether S3, the loudness for detecting maximum loudness noise exceed loudness threshold；
If S4, testing result be it is yes, generate inhibit maximum loudness noise neutralization noise.
2. noise-reduction method as described in claim 1, which is characterized in that the step S2 specifically comprises the following steps:
The decibel of S21, the noise based on different frequency and corresponding noise assess the loudness of each frequency noise；
S22, the maximum noise frequency of loudness is determined.
3. noise-reduction method as described in claim 1, which is characterized in that the spectral phase and maximum loudness noise for neutralizing noise
Spectral phase phase difference be π.
4. noise-reduction method as described in claim 1, which is characterized in that before step S2 further include:
S5, rejecting human ear can not perceive the noise of frequency range.
5. a kind of noise reducing apparatus, which is characterized in that the equipment includes:
It is sequentially connected noise collector unit, noise screening unit, comparing unit and noise neutralisation unit；
Wherein, noise collector unit, for collecting the noise in environment；
Noise screening unit screens the frequency noise of most loudness；
The loudness of maximum loudness noise is compared by comparing unit with loudness threshold；
When the loudness of maximum loudness noise is greater than noise threshold, then the raw neutralization for inhibiting maximum loudness noise of noise neutralisation unit is made an uproar
Sound.
6. noise reducing apparatus as claimed in claim 5, which is characterized in that the spectral phase and maximum loudness noise for neutralizing noise
Spectral phase phase difference be π.
7. noise reducing apparatus as claimed in claim 5, which is characterized in that the noise screening unit includes:
The decibel of loudness evaluation module, noise and corresponding noise based on different frequency assesses the loudness of each frequency noise；
Maximum loudness determining module determines the maximum noise frequency of loudness.
8. noise reducing apparatus as claimed in claim 5, which is characterized in that noise reducing apparatus further include: culling unit, rejecting human ear can not
Perceive the noise of frequency range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811174038.5A CN109166567A (en) | 2018-10-09 | 2018-10-09 | A kind of noise-reduction method and equipment |
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| CN201811174038.5A CN109166567A (en) | 2018-10-09 | 2018-10-09 | A kind of noise-reduction method and equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114898732A (en) * | 2022-07-05 | 2022-08-12 | 深圳瑞科曼环保科技有限公司 | Noise processing method and system capable of adjusting frequency range |
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