CN103139688A - Method, device and hearing-aid for eliminating environmental noise - Google Patents
Method, device and hearing-aid for eliminating environmental noise Download PDFInfo
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- CN103139688A CN103139688A CN2013100630938A CN201310063093A CN103139688A CN 103139688 A CN103139688 A CN 103139688A CN 2013100630938 A CN2013100630938 A CN 2013100630938A CN 201310063093 A CN201310063093 A CN 201310063093A CN 103139688 A CN103139688 A CN 103139688A
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Abstract
The invention provides a method for eliminating environmental noise. The method includes: step 1, carrying out analog/digital conversion on environmental noise; step 2, comparing the converted result with a noise digital sample in a preset sample bank, and obtaining the noise comparison result; step 3, comparing the noise with noise in the result to carry out digitized elimination, and obtaining digitized audio after the elimination; and step 4, carrying out the analog/digital conversion on the digitalized audio and then outputting the converted result. The invention further discloses a device and a hearing-aid for the eliminating environmental noise. Through the method, the device and the hearing-aid for eliminating environmental noise, comparison with the noise in the sample is carried out, and background noise can be effectively identified, attenuated and eliminated in a digitalized mode. Thus, interference with effective signals is substantially reduced, and the hearing aid quality of the hearing-aid is promoted.
Description
Technical field
The present invention relates to a kind of hearing aids field, particularly a kind of method, device and hearing aids of eliminating environmental noise.
Background technology
Hearing aids is one and helps hearing disabilities person to improve dysacousis, and then instrument, unit and the instrument etc. of raising and his conference communicative competence.All in a broad sense various devices that can be effectively sound be imported into ear can be seen hearing aids as, say that narrowly hearing aids is exactly an electroacoustic amplifier, the deaf person had been heard originally the sound amplification by it and can not hear clearly, unheard sound, this device is exactly hearing aids.
Hearing aids a multitude of names, but the operation principle of all electronic hearing aids is the same.Hearing aids comprises 6 basic structures: 1. microphone (microphone or microphone) receives sound and it is converted into the electric wave form, namely acoustic energy is converted into electric energy; 2. amplifier amplification signal (transistor amplifying circuit); 3. earphone (receiver) is converted into acoustical signal (being namely acoustic energy) to the signal of telecommunication to electric energy conversion; 4. ear mold (earplug) is inserted external auditory meatus; 5. volume control switch; 6. power supply is for the dry cell of amplifier.
In prior art, general hearing aids adopts the analog signal amplification mechanism, suitably high, medium and low frequency signal is adjusted, to reach applicable requirement.Also exist when background noise larger, when more complicated, because the stack of background noise and useful signal, result causes the defective of useful signal quality degradation.
Summary of the invention
The present invention proposes a kind of method, device and hearing aids of eliminating environmental noise, has solved the larger problem of environmental noise in hearing aids of eliminating.
Technical scheme of the present invention is achieved in that
The invention discloses a kind of method of eliminating environmental noise, comprising:
S1. ambient sound is carried out mould/number conversion;
S2. with default Sample Storehouse in the noise numeral sample compare, obtain the noise comparison result;
S3. the noise in described noise comparison result is carried out digitlization and eliminate, the digitized audio frequency after obtaining to eliminate;
S4. described digitized audio frequency is carried out D/A switch and output.
Method as elimination environmental noise of the present invention is further improved, and also comprises step S0, records in the given time environmental sound signal and processes.
Method as elimination environmental noise of the present invention is further improved, and the sound that the processing described in step S0 is recorded comprises: environmental sound signal is carried out preliminary treatment, end-point detection, spectrum analysis, feature extraction.
Method as elimination environmental noise of the present invention is further improved, and also comprises step S21 after described step S2: when comparing unsuccessfully, and the prompting of feedback " there is no comparison result ".
The invention discloses a kind of device of eliminating environmental noise, comprising:
The A/D converting unit is used for ambient sound is carried out mould/number conversion;
Comparison result obtains the unit, is used for comparing with the noise numeral sample of default Sample Storehouse, obtains the noise comparison result;
Noise is eliminated the unit, is used for the noise of described noise comparison result being carried out the digitlization elimination, the digitized audio frequency after obtaining to eliminate;
The D/A converting unit is used for described digitized audio frequency is carried out D/A switch and output.
Device as elimination environmental noise of the present invention further improves, and also comprises the voice signal recording elements before described A/D converting unit, records in the given time ambient sound and processes.
Device as elimination environmental noise of the present invention further improves, and the sound that described processing is recorded comprises: voice signal is carried out preliminary treatment, end-point detection, spectrum analysis, feature extraction.
Device as elimination environmental noise of the present invention further improves, and described comparison result obtains also to comprise step feedback Tip element after the unit, is used for when comparing unsuccessfully the prompting of feedback " there is no comparison result ".
The invention discloses a kind of hearing aids of eliminating environmental noise, comprise the hearing aids body, described hearing aids body has digital signal processing module, it is characterized in that, described digital signal processing module has the device of above-mentioned elimination environmental noise.
As the further improvement of the hearing aids of elimination environmental noise of the present invention, described hearing aids body has microphone and the loudspeaker that all are connected with described digital signal processing module.
Implement a kind of method and apparatus and hearing aids of eliminating environmental noise of the present invention, have following useful technique effect:
By with sample in noise compare, background noise effectively can be identified, then carries out digitlization decay and even eliminate, thereby decrease improves the hearing aid quality of hearing aids to the interference of useful signal.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of method flow diagram of eliminating environmental noise of the present invention;
Fig. 2 a is a kind of device construction block diagram of eliminating environmental noise of the present invention;
Fig. 2 b is Fig. 2 a work schematic diagram of the present invention;
Fig. 3 is a kind of hearing aids structure block diagram of eliminating environmental noise of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
See also Fig. 1, preferred embodiment of the present invention, a kind of method of eliminating environmental noise comprises:
S1. ambient sound is carried out mould/number conversion;
S2. with default Sample Storehouse in the noise numeral sample compare, obtain the noise comparison result;
Wherein, after the feature of noise parameter is processed, set up a model for the digital quantity of each common noise, save as noise reference template storehouse.In the comparison stage, voice signal obtains speech characteristic parameter through identical passage, generates test template, mates with the noise reference template, and the reference template that the coupling mark is the highest is as recognition result.
S3. the noise in described noise comparison result is carried out digitlization and eliminate, the digitized audio frequency after obtaining to eliminate;
S4. described digitized audio frequency is carried out D/A switch and output.
Further, also comprise step S0, record in the given time environmental sound signal and process.
Further, the sound recorded of the processing described in step S0 comprises: environmental sound signal is carried out preliminary treatment, end-point detection, spectrum analysis, feature extraction.
Wherein, the end-point detection technology can be confirmed starting point and the end point of language from a segment information of the language that comprises various information, effectively the end-point detection technology can not only reduce the processing time of system, the disposal ability of raising system, and can discharge the noise jamming of voiceless sound end, thereby the performance of language identification is improved greatly.
Further, also comprise step S21 after described step S2: when comparing unsuccessfully, the prompting of feedback " there is no comparison result ".
That is: when recognizing the sample that there is no coupling in noise reference template storehouse, sound equipment can be pointed out " there is no recognition result " backed off after random acoustic control identification.Carry out next step operation when recognizing instruction.
See also Fig. 2 a, a kind of device 1 of eliminating environmental noise, comprising:
A/D converting unit 10 is used for ambient sound is carried out mould/number conversion;
Comparison result obtains unit 20, is used for comparing with the noise numeral sample of default Sample Storehouse, obtains the noise comparison result;
Noise is eliminated unit 30, is used for the noise of described noise comparison result being carried out the digitlization elimination, the digitized audio frequency after obtaining to eliminate;
D/A converting unit 40 is used for described digitized audio frequency is carried out D/A switch and output.
Preferably, also comprise voice signal recording elements 5 before A/D converting unit 10, record in the given time ambient sound and process, the sound that described processing is recorded comprises: voice signal is carried out preliminary treatment, end-point detection, spectrum analysis, feature extraction.
Preferably, comparison result obtains also to comprise feedback Tip element 25 after unit 20, is used for when comparing unsuccessfully the prompting of feedback " there is no comparison result ".
Generally speaking, the analog signal that contains noise is input to the ADC(analog-digital converter) become the digital signal that contains noise after processing, this signal is input to the DSP(digital signal processor again) become the digital signal that abates the noise after processing, this signal inputs to again the DAC(digital analog converter) become the analog signal after abating the noise after processing, as shown in Fig. 2 b.
See also Fig. 3, a kind of hearing aids of eliminating environmental noise, comprise hearing aids body 100, hearing aids body 100 has digital signal processing module 200, and digital signal processing module has the device 1 of above-mentioned elimination environmental noise.
Further, hearing aids body 100 has microphone and the loudspeaker that all are connected with digital signal processing module 200.
The hearing aids of the elimination environmental noise in the technical program can significantly improve hearing aids hearing aid quality and level, brings better experience to the user.Audio signal digitizing is the core mechanism that noise is eliminated, and the Mathematical treatment after the digitlization of audio frequency is even eliminated reducing noise, and then will reduce noise or abate the noise after digitized audio reduce, thereby obtain high-quality useful signal.
Implement a kind of method and apparatus and hearing aids of eliminating environmental noise of the present invention, have following useful technique effect:
By with sample in noise compare, background noise effectively can be identified, then carries out digitlization decay and even eliminate, thereby decrease improves the hearing aid quality of hearing aids to the interference of useful signal.
The above is only preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a method of eliminating environmental noise, is characterized in that, comprising:
S1. ambient sound is carried out mould/number conversion;
S2. with default Sample Storehouse in the noise numeral sample compare, obtain the noise comparison result;
S3. the noise in described noise comparison result is carried out digitlization and eliminate, the digitized audio frequency after obtaining to eliminate;
S4. described digitized audio frequency is carried out D/A switch and output.
2. the method for elimination environmental noise according to claim 1, is characterized in that, also comprises step S0, records in the given time environmental sound signal and process.
3. the method for elimination environmental noise according to claim 2, is characterized in that, the sound that the processing described in step S0 is recorded comprises: environmental sound signal is carried out preliminary treatment, end-point detection, spectrum analysis, feature extraction.
4. the method for elimination environmental noise according to claim 1, is characterized in that, also comprises step S21 after described step S2: when comparing unsuccessfully, and the prompting of feedback " there is no comparison result ".
5. a device of eliminating environmental noise, is characterized in that, comprising:
The A/D converting unit is used for ambient sound is carried out mould/number conversion;
Comparison result obtains the unit, is used for comparing with the noise numeral sample of default Sample Storehouse, obtains the noise comparison result;
Noise is eliminated the unit, is used for the noise of described noise comparison result being carried out the digitlization elimination, the digitized audio frequency after obtaining to eliminate;
The D/A converting unit is used for described digitized audio frequency is carried out D/A switch and output.
6. the device of elimination environmental noise according to claim 5, is characterized in that, also comprises the voice signal recording elements before described A/D converting unit, records in the given time ambient sound and process.
7. the device of elimination environmental noise according to claim 6, is characterized in that, the sound that described processing is recorded comprises: voice signal is carried out preliminary treatment, end-point detection, spectrum analysis, feature extraction.
8. the device of elimination environmental noise according to claim 5, is characterized in that, described comparison result obtains also to comprise step feedback Tip element after the unit, is used for when comparing unsuccessfully the prompting of feedback " there is no comparison result ".
9. hearing aids of eliminating environmental noise, comprise the hearing aids body, described hearing aids body has digital signal processing module, it is characterized in that, described digital signal processing module has the device of the described elimination environmental noise of claim 5 to 8 any one.
10. the hearing aids of elimination environmental noise according to claim 9, is characterized in that, described hearing aids body has microphone and the loudspeaker that all are connected with described digital signal processing module.
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| CN2013100630938A CN103139688A (en) | 2013-02-27 | 2013-02-27 | Method, device and hearing-aid for eliminating environmental noise |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103458349A (en) * | 2013-09-22 | 2013-12-18 | 北京九鹤科技有限公司 | Hearing assisting system |
| CN104038868A (en) * | 2014-05-27 | 2014-09-10 | 圆刚科技股份有限公司 | Noise-resisting earmuff device and sound processing method thereof |
| CN104616662A (en) * | 2015-01-27 | 2015-05-13 | 中国科学院理化技术研究所 | Active noise reduction method and device |
| CN106303783A (en) * | 2016-08-12 | 2017-01-04 | 北京金锐德路科技有限公司 | Noise-reduction method and device |
| CN106453760A (en) * | 2016-10-11 | 2017-02-22 | 努比亚技术有限公司 | Method for improving environmental noise and terminal |
| CN106782591A (en) * | 2016-12-26 | 2017-05-31 | 惠州Tcl移动通信有限公司 | A kind of devices and methods therefor that phonetic recognization rate is improved under background noise |
| CN107564508A (en) * | 2017-10-17 | 2018-01-09 | 潘跃升 | A kind of active noise reduction control system and the method based on the system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103458349A (en) * | 2013-09-22 | 2013-12-18 | 北京九鹤科技有限公司 | Hearing assisting system |
| CN104038868A (en) * | 2014-05-27 | 2014-09-10 | 圆刚科技股份有限公司 | Noise-resisting earmuff device and sound processing method thereof |
| CN104038868B (en) * | 2014-05-27 | 2017-12-05 | 圆刚科技股份有限公司 | Noise canceling earmuff device and its sound processing method |
| CN104616662A (en) * | 2015-01-27 | 2015-05-13 | 中国科学院理化技术研究所 | Active noise reduction method and device |
| CN106303783A (en) * | 2016-08-12 | 2017-01-04 | 北京金锐德路科技有限公司 | Noise-reduction method and device |
| CN106453760A (en) * | 2016-10-11 | 2017-02-22 | 努比亚技术有限公司 | Method for improving environmental noise and terminal |
| CN106782591A (en) * | 2016-12-26 | 2017-05-31 | 惠州Tcl移动通信有限公司 | A kind of devices and methods therefor that phonetic recognization rate is improved under background noise |
| CN107564508A (en) * | 2017-10-17 | 2018-01-09 | 潘跃升 | A kind of active noise reduction control system and the method based on the system |
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