CN103581815A - Method for improving correctness of sounds heard by hearing-impaired listeners and hearing aid - Google Patents
Method for improving correctness of sounds heard by hearing-impaired listeners and hearing aid Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 208000032041 Hearing impaired Diseases 0.000 title abstract description 4
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- 230000004888 barrier function Effects 0.000 claims description 48
- 230000009466 transformation Effects 0.000 claims description 18
- 230000003321 amplification Effects 0.000 abstract description 6
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract 2
- 238000012545 processing Methods 0.000 description 33
- 238000010586 diagram Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 9
- 238000012937 correction Methods 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 4
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- 238000007906 compression Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 206010011878 Deafness Diseases 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
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- 230000010370 hearing loss Effects 0.000 description 1
- 231100000888 hearing loss Toxicity 0.000 description 1
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Abstract
The invention relates to a method for improving the correctness of sounds heard by hearing-impaired listeners. The method includes the following steps that input sounds are received, energy scaling is conducted on a high-frequency sound area first, then down-conversion is carried out on the high-frequency sound area, and afterwards the input sounds are transformed by the way that a non-high-frequency sound area and a high-frequency down-conversion amplification sound area are combined.
Description
Technical field
The present invention relates to method and hearing aids that a kind of raising person that listens to barrier hears sound correctness, particularly relate to method and hearing aids that a kind of raising that sound import is carried out to frequency correction person that listens to barrier hears sound correctness.
Background technology
The development of hearing aids is long-standing, and main concept is that sound is amplified, and to help listening to barrier, person hears unheard sound originally.Thus, speaker does not need deliberately sound to amplify, and just can allow listen to barrier person hears.But listen to barrier, the inaudible sound of person has two specific characters: frequency is too high and intensity is too low, and the sound that possesses this two specific character is easy to just to be listened to barrier, and person neglects.Sounds such as " ㄗ " in phonetic notation, " ㄘ " and " ㄙ " just has this specific character, and person is difficult for hearing these syllables therefore to listen to barrier.Yet the hearing aids having developed at present focuses on the energy that strengthens all sound more, and None-identified goes out the syllable that partly really need to strengthen, so by the audio distortions making after amplification.About by processing sound frequency, to improve the related art of sound briefly as follows:
Prior art United States Patent (USP) the 7th, 305, No. 100 " Dynamic compression in a hearing aid " is mainly for reducing the delay of sound.
Prior art United States Patent (USP) the 4th, 454, No. 609 " Speech intelligibility enhancement " does and strengthens for the consonant sound of high frequency, and the ratio of central high-frequency sound is higher, and more high-frequency contents are enhanced.This invention is done and is strengthened for the consonant of high frequency, yet for the occasion of generally speaking, is very difficult for when there being consonant to occur, is not therefore suitable for hearing aids.
Prior art United States Patent (USP) the 4th, 759, No. 071 " Automatic noise eliminator for hearing aids " is mainly for eliminating noise, the practice is for to remove all sound lower than certain default value, and to doing and compress higher than the sound of default value.This technology is different with the object of the invention, and all sound lower than certain default value is removed probably and can cause audio distortions.
Prior art United States Patent (USP) the 6th, 577, No. 739 " Apparatus and methods for proportional audio compression and frequency shifting " compresses voice signal with certain ratio after, offer the person that listens to barrier who certain particular range is had to hearing loss, yet this technology is that all sound is done and compressed, can make audio distortions serious.
Prior art United States Patent (USP) the 7th, 609, No. 841 " Frequency shifter for use in adaptive feedback cancellers for hearing aids " have improved the shift frequency method of prior art, only for signal medium-high frequency, partly do shift frequency (up or down), and by shift frequency limited proportion in 6%.The 7th, 609, though be for No. 841 that high-frequency signal is partly made to shift frequency, do not have the first energy for high-frequency signal to carry out convergent-divergent processing yet.
Prior art United States Patent (USP) the 7th, 580, No. 536 " Sound enhancement for hearing-impaired listeners " proposes the method for the sound that a kind of enhancing person that listens to barrier can hear, way be by the HFS in sound and surpass one set energy time can carry out voltage-frequency or the lower frequency range of shift frequency to, the part of low frequency (frequency that common people speak) is not changed.The 7th, 580, No. 536 handled high-frequency sounds refer to 32kHz(the 6th hurdle the 18th row according to the example of specification), the frequency that not common people speak, and in the middle of specification, also do not disclose the so-called numerical value that surpasses " energy of setting ".
In view of this, be necessary to provide a kind of and identify the real sound that needs work to strengthen, and it is carried out to method and the device of frequency correction, to solve the shortcoming of prior art.People is for addressing the above problem in application, also once applied for U. S. application patent the 13/064th, No. 645 " raising listens to barrier, and person hears method and the hearing aids METHOD AND HEARING AID FOR ENHANCING THE ACCURACY OF SOUNDS HEARD BY A HEARING-IMPAIRED LISTENER of sound correctness ", the present invention reintroduces a new mode.
Summary of the invention
Main purpose of the present invention is providing a kind of raising person that listens to barrier to hear the method for sound correctness.
Another main purpose of the present invention is providing a kind of raising person that listens to barrier to hear the hearing aids of sound correctness.
For reaching above-mentioned object, raising of the present invention listens to barrier, and person hears that the method for sound correctness comprises the following steps:
Receive sound import, wherein sound import includes high-frequency sound district, and non-high-frequency sound district.
By high-frequency sound district convergent-divergent energy to form high-frequency sound treatment region.
High-frequency sound treatment region is carried out to frequency reducing to form high frequency frequency reducing voice emplifying district.
Combine non-high-frequency sound district and high frequency frequency reducing voice emplifying district to form transformation sound import.
Output transformation sound import.
Above-mentioned raising listens to barrier, and person hears the method for sound correctness, wherein, adopts the mode of voltage-frequency or shift frequency to carry out frequency reducing in step C.
Above-mentioned raising listens to barrier, and person hears the method for sound correctness, and wherein, the frequency that the frequency in high-frequency sound district is positioned at ，Fei high-frequency sound district between 1000 hertz (Hz) and 96000 hertz (Hz) is positioned between 0 hertz (Hz) and 6000 hertz (Hz).
Above-mentioned raising listens to barrier, and person hears the method for sound correctness, and wherein, in step e, output transformation sound import is just to export through amplified energy again.
Above-mentioned raising listens to barrier, and person hears the method for sound correctness, wherein, and in the front step F that also comprises of steps A:
Judge whether sound import needs to carry out steps A～step e, when sound import has following characteristic, do not carry out steps A～step e, and directly by sound import output, or will after sound import amplified energy, export:
Sound import is greater than 70% with the acoustic energy of upper frequency with respect to the ratio value of all acoustic energy of sound import in 1000 hertz (Hz), and
Sound import is less than 20% with the acoustic energy of lower frequency with respect to the ratio value of all acoustic energy of sound import in 2000 hertz (Hz).
Above-mentioned raising listens to barrier, and person hears the method for sound correctness, and wherein, in step e, output transformation sound import is just to export through amplified energy again.
Of the present invention focusing on first carried out the synthetic transformation in frequency reducing ，Zai Jiangfei high-frequency sound district and high frequency frequency reducing voice emplifying district sound import for convergent-divergent energy ，Zai Jiang high-frequency sound district, high-frequency sound district.
Accompanying drawing explanation
Fig. 1 is the integrated stand composition of hearing aids of the present invention;
Fig. 2 is the flow chart of steps of acoustic processing module of the present invention;
Fig. 3 is the schematic diagram that sound source is cut to a plurality of sound imports;
Fig. 4 is the schematic diagram that sound import is divided into high-frequency sound district Ji Fei high-frequency sound district;
Tu5Wei high-frequency sound district is treated to the schematic diagram of high-frequency sound treatment region;
Fig. 6 is that high-frequency sound treatment region carries out frequency reducing (take shift frequency as example) to form a high frequency frequency reducing voice emplifying district, to form the schematic diagram of transformation sound import;
Fig. 7 is that high-frequency sound treatment region carries out frequency reducing (take voltage-frequency as example) to form a high frequency frequency reducing voice emplifying district, to form the schematic diagram of transformation sound import.
Reference numeral
10: hearing aids 11: radio reception device
12: acoustic processing module 13: loud speaker
20: sound import 21: high-frequency sound district
22: non-high-frequency sound district 21a: high-frequency sound treatment region
21d: high frequency frequency reducing voice emplifying district 30: transformation sound import
80: sound source 81: the person that listens to barrier
Embodiment
For above and other objects of the present invention, feature and advantage can be become apparent, below especially exemplified by going out specific embodiments of the invention, and coordinate appended accompanying drawing, be described in detail below.
Below please refer to the integrated stand composition of Fig. 1 hearing aids of the present invention.
Then please refer to Fig. 2, is the flow chart of steps about acoustic processing module of the present invention.The another schematic diagram please also refer to Fig. 3 to Fig. 6.
Step 201: receive sound import 20.
This step is completed by radio reception device 11, is received from the sound import 20 that sound source 80 is sent.
Step 202: to sound import 20 noise reductions.
Step 203: judge whether sound import 20 needs to carry out the processing of frequency correction.
By acoustic processing module 12 according to the condition of setting in advance, judge whether need be to these sound import 20 working frequency corrections processing.Take Chinese speech as example, sounding is to contain multi-frequency, comprise basic, normal, high frequency, and the sounding concentration of energy of most Chinese character phonetic alphabet initial consonant is in the low-frequency range of 20 ~ 1000Hz but also have several phonetic symbols as " ㄗ ", " ㄘ " or " ㄙ " etc., the shared energy proportion of its low frequency is very low, and energy almost all concentrates on the part of high frequency.And the general person that listens to barrier is for the susceptibility very low (such as more than 6000Hz) of high-frequency sound, that is to say, compared to low-frequency sound, high-frequency sound need send by larger volume as " ㄗ ", " ㄘ " or " ㄙ " etc., person perhaps just can hear to listen to barrier, if but whole with larger volume, send, the part of low frequency is for listening barrier too loud again, so whole voice emplifying cannot be dealt with problems.Even if use filtering technique only to improve high-frequency energy, still can there is the painful limit value that sound exceeded the person that listens to barrier and but still can't hear.
Some conventional art such as United States Patent (USP) 6,577, No. 739, all sound frequencies are reduced to voice emplifying energy again and give the person that listens to barrier, although can help to listen to barrier, person hears that script is the sound of high frequency, but due to all sound frequencies reduce (comprise and originally can hear) so sound seriously rotten, for listening to barrier, person brings obstacle at learning pronunciation for this.
Raising of the present invention listens to barrier, and person hears the method for sound correctness, and object falls low-frequency processing accounting for more sound clip for high-frequency energy.The sound import 20 that need carry out frequency processing has following characteristic:
In the situation that is 44100Hz in audio digital signal sampling rate, sound import 20 in 1000Hz with the acoustic energy of upper frequency with respect to the ratio value of sound import 20 all acoustic energy (with ρ
0mas conventional letter) be greater than 70%, and sound import 20 in 2000Hz with the acoustic energy of lower frequency with respect to the ratio value of these sound import 20 all acoustic energy (with ρ
1mas conventional letter) be less than 20%, if sound import 20 meets above-mentioned two conditions, represent that its concentration of energy is at HFS, person hears to be not easy to be listened to barrier, therefore must process its frequency.
The judgment mode of step 203 has many modes to reach on Practical Project, in order to want fast (for example completing at 0.01 second), estimate and whether will carry out step 204, the energy of every 1024 numerical value (Frame) sampling observation frequency for example, then with Fuzzy Logic(fuzzy logic) judge whether to conform with above two conditions.Fig. 3 is the schematic diagram that sound source 80 is cut to a plurality of sound imports 20, and each sound import 20 suggestion all will be through the judgement of step 203.This kind of judgement has suitable various ways in the computing of mathematics, and also non-the present invention wants improved mathematical operation pattern, does not therefore repeat them here.The judgment mode that should be noted step 203 also can be set different doors, and above two conditions are the conservative door after experiment computing, if will set above two conditions suggestion of stricter door, is:
The sound of Chinese " ㄅ ㄚ ' " of take is example, and the acoustic energy of " ㄅ ㄚ ' " concentrates in the scope of 1000 ~ 2000Hz, can obtain ρ after as calculated
1mbe about 95%, therefore can be to " ㄅ ㄚ ' " working frequency correction.
Take Chinese " ㄙ ㄠ " sound be example, " ㄙ ㄠ ", wherein the first syllable is " ㄙ ", ρ
0mbe 99.8% to be greater than 70%, and ρ
1mbe 5% to be less than 20%, therefore to listening to barrier, person is difficult to hear " ㄙ " this sound, must deal with its frequency.
Substantially the frequency in high-frequency sound district is to be positioned at the frequency in ，Gai Fei high-frequency sound district between 1000 hertz (Hz) and 96000 hertz (Hz) to be positioned between 0 hertz (Hz) and 6000 hertz (Hz) according to the most person's that listens to barrier experiment.
If judgement sound import 20 need carry out the processing of frequency correction in step 203, carry out step 204, otherwise carry out step 207.
Step 204: by high-frequency sound district 21 convergent-divergent energy to form a high-frequency sound treatment region 21a.
The sound import 20 that needs step 203 to process includes a high-frequency sound district 21, and Yi Fei high-frequency sound district 22.For example after step 203 judgement, needing the sound import 20 of processing is high-frequency sound district 21 at the section (14000Hz is insignificant section above) of 8000Hz ~ 14000Hz, and in the following Wei Fei high-frequency sound of 8000Hz district 22.Owing to calculating or stipulating that the mode in high-frequency sound district 21 is very multiple, also can adjust according to the difference person that listens to barrier that (such as some person that listens to the barrier section that need determine 6000Hz ~ 14000Hz is high-frequency sound district 21, the following Wei Fei high-frequency sound of 6000Hz district 22), son more than takes a single example.Of the present invention focusing on high-frequency sound district 21 convergent-divergent energy to form a high-frequency sound treatment region 21a, for example amplifies five times to form a high-frequency sound treatment region 21a, as the schematic diagram of Fig. 5 by high-frequency sound district 21.
Should be noted, high-frequency sound district 21 differs, and to establish a capital be amplified energy to form high-frequency sound treatment region 21a, even can dwindle energy sometimes according to frequency difference, but substantially at least some energy in high-frequency sound district 21 can be exaggerated.Take the high-frequency sound district 21 of 8000 ~ 14000Hz is example, if intend to move on to 0 ~ 6000Hz(toward moving down 8000Hz in step 205), if but listen to barrier, person can only hear below 3000Hz, 11000 original ~ 14000Hz just can be filtered (so the energy of 11000 ~ 14000Hz is to have reduced), therefore in the meaning of " convergent-divergent " described in step 204 energy at this.
Step 205: this high-frequency sound treatment region 21a is carried out to frequency reducing to form a high frequency frequency reducing voice emplifying district 21d.
Generally speaking, the mode of carrying out frequency reducing is mainly shift frequency and voltage-frequency, or both are mixed, and the main function of this step is to allow high-frequency sound treatment region 21a frequency reducing, and person can hear to make to listen to barrier.Fig. 6 shows the schematic diagram of high frequency frequency reducing voice emplifying district 21d shift frequency, and Fig. 7 shows the schematic diagram of high frequency frequency reducing voice emplifying district 21d voltage-frequency, because the technology of frequency reducing is known technology, does not therefore repeat them here.
Step 206: combine non-high-frequency sound district 22 and high frequency frequency reducing voice emplifying district 21d to form (synthesizing) transformation sound import 30, as the schematic diagram of Fig. 6 and Fig. 7.Should be noted, non-high-frequency sound district 22 can no longer change frequency (such as frequency reducing) substantially, but for tonequality, process more perfectly, also can change frequency, in the non-high-frequency sound district 22 described in this specification and claim can for through or without the sound zones of the processing of frequency.
Step 207: sound import 20 or transformation sound import 30 are carried out to sound amplification processing.
In step 203, if judgement sound import 20 does not need to carry out the processing of frequency correction, carry out step 207 and amplify processing about sound import 20 being carried out to sound.If step 206 enters step 207, be transformation sound import 30 to be carried out to sound amplify processing.
Substantially to listening to barrier, person 81 need to amplify and process through sound, even if be also equally will process through sound amplification for non-high-frequency sound district 22.Of the present invention focusing on first carried out frequency reducing (step 205) ，Zai Jiangfei high-frequency sound district 22 and the synthetic transformation of high frequency frequency reducing voice emplifying district 21d sound import 30 for 21 convergent-divergent energy (step 204) ，Zai Jiang high-frequency sound districts 21, high-frequency sound district.Generally speaking transform sound import 30 and still will carry out sound amplification processing.But according to the person's that listens to barrier situation, step 207 does not likely need yet.
Step 208: loud speaker 13 plays sound.
Should be noted, hearing aids 10 should be wanted energy fast processing sound, person 81 can hear sound to be close to synchronous mode to make to listen to barrier, the sound length of sound import 20 should shorten as far as possible, the time postponing like this can shorten, for example within every 0.01 second, carry out above flow process, so in fact the length of each sound import 20 is 0.01 second, for example the time of " ㄙ ㄠ " is 1 second, be actually and carry out the judgement of 100 times (sound of at every turn grabbing 0.01 second judges whether to process, the sound of first receiving first judges first to be processed), suppose that the first syllable " ㄙ " has accounted for 0.1 second, all the other have accounted for 0.9 second, the sound import 20 of first 10 times can be treated to transformation sound import 30, the sound import 20 of 90 times next can not be treated to transformation sound import 21.
Hearing aids is in the past for " good morning " two words, person easily listens the output of sound for " stubborn peace " to listen to barrier, this has illustrated that the person that why listens to barrier nearly all says into " stubborn peace " when saying " good morning " two word, yet after processing mode simulated experiment of the present invention, the output sound of " good morning " two words that the person that listens to barrier hears quite approaches " good morning " and without rotten.
Above technology also can be used for other Languages, certainly passes through experimental result, particularly useful for the word of mora, if the word of Chinese, Japanese, Korean is mostly mora, take Chinese as example, and each word of all Chinese only has at most three syllables.As lower in the effect of English for polysyllabic language; but because all language have mora, for example English " Say ", person often can say into " A " to listen to barrier; but after processing mode simulated experiment of the present invention, the output sound of " Say " is quite approaching " Say " and without rotten.
It should be noted in the discussion above that above-mentioned many embodiment give an example for convenience of explanation, the interest field that the present invention advocates should be as the criterion with described in claims, but not only limits to above-described embodiment.
Claims (6)
1. the raising person that listens to barrier hears a method for sound correctness, comprises the following steps:
A. receive a sound import, wherein this sound import includes a high-frequency sound district, and Yi Fei high-frequency sound district;
B.Jiang Gai high-frequency sound district convergent-divergent energy is to form a high-frequency sound treatment region;
C. this high-frequency sound treatment region is carried out to frequency reducing to form a high frequency frequency reducing voice emplifying district;
D. combine Gai Fei high-frequency sound district and this high frequency frequency reducing voice emplifying district to form a transformation sound import; And
E. export this transformation sound import.
2. the raising according to claim 1 person that listens to barrier hears the method for sound correctness, it is characterized in that, adopts the mode of voltage-frequency or shift frequency to carry out frequency reducing in step C.
3. the raising according to claim 2 person that listens to barrier hears the method for sound correctness, the frequency that it is characterized in that ，Gai high-frequency sound district in the frequency in ，Gai Fei high-frequency sound district between 1000 hertz and 96000 hertz between 0 hertz and 6000 hertz.
4. the raising according to claim 3 person that listens to barrier hears the method for sound correctness, it is characterized in that, in step e, exports this transformation sound import and is through amplified energy again and just export.
5. the raising according to claim 4 person that listens to barrier hears the method for sound correctness, it is characterized in that, also comprises step F before steps A:
Judge whether this sound import needs to carry out steps A～step e, when this sound import has following characteristic, do not carry out steps A～step e, and directly by this sound import output, maybe will after this sound import amplified energy, export:
This sound import is greater than 70% in 1000 hertz of acoustic energy with upper frequency with respect to the ratio value of all acoustic energy of this sound import, and
This sound import is less than 20% in 2000 hertz of acoustic energy with lower frequency with respect to the ratio value of all acoustic energy of this sound import.
6. according to claim 1 to the raising described in any one in claim 5 person that listens to barrier, hear the method for sound correctness, it is characterized in that, in step e, export this transformation sound import and be through amplified energy again and just export.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106328158A (en) * | 2015-06-17 | 2017-01-11 | 宏碁股份有限公司 | Voice signal processing device and voice signal processing method |
| TWI603627B (en) * | 2015-07-03 | 2017-10-21 | 元鼎音訊股份有限公司 | Method and computer program product of processing voice segment and hearing aid |
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| CN1836465B (en) * | 2003-08-11 | 2010-10-06 | 瓦斯特音频有限公司 | Sound enhancement method and device for hearing-impaired listeners |
| CN102547543A (en) * | 2010-12-10 | 2012-07-04 | 杨国屏 | Method for improving accuracy of sound heard by hearing-impaired listener and hearing aid |
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- 2012-08-08 CN CN201210280875.2A patent/CN103581815A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5077800A (en) * | 1988-10-14 | 1991-12-31 | Societe Anonyme Dite: Laboratorie D'audiologie Dupret-Lefevre S.A. | Electronic device for processing a sound signal |
| CN1836465B (en) * | 2003-08-11 | 2010-10-06 | 瓦斯特音频有限公司 | Sound enhancement method and device for hearing-impaired listeners |
| CN102547543A (en) * | 2010-12-10 | 2012-07-04 | 杨国屏 | Method for improving accuracy of sound heard by hearing-impaired listener and hearing aid |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106328158A (en) * | 2015-06-17 | 2017-01-11 | 宏碁股份有限公司 | Voice signal processing device and voice signal processing method |
| CN106328158B (en) * | 2015-06-17 | 2019-08-06 | 宏碁股份有限公司 | Speech signal processing device and audio signal processing method |
| TWI603627B (en) * | 2015-07-03 | 2017-10-21 | 元鼎音訊股份有限公司 | Method and computer program product of processing voice segment and hearing aid |
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