CN104056357B - Defibrillator, and voice volume automatic adjusting method and apparatus thereof - Google Patents
Defibrillator, and voice volume automatic adjusting method and apparatus thereof Download PDFInfo
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Abstract
The invention provides a defibrillator, and a voice volume automatic adjusting method and apparatus thereof. First of all, surrounding environment noise is acquired, then through a comparison, a preset noise sample closest to environment noise data is acquired, and according to the preset noise sample, voice volume output parameters are adjusted, such that the voice volume is adjusted, the voice volume matches the environment noise most, and mechanical adjustment of the size of the voice volume according to the size of the noise is prevented. The voice volume automatic adjusting method and apparatus can accurately and automatically adjust the voice volume of the defibrillator.
Description
Technical field
The present invention relates to medical instruments field, more particularly to defibrillator and its speech volume Automatic adjustment method and dress
Put.
Background technology
It is understood that sudden cardiac death most common reason is ventricular fibrillation, all only do cardiac compression or other measures
The persistent period quivered in room can be extended, be temporarily important organ blood supply oxygen supply, and room cannot be terminated quiver recovering the rhythm of the heart of effectively perfusion.
So quiver in Quick stop room at the scene, it is only and saves life method the most basic, here it is defibrillation.
Defibrillator (automatic external defibrillator, aed), is a kind of portable, easily operated, slightly
Plus training can skillfully use, aim at the first-aid apparatus of field first aid design.
Defibrillator is generally used for public place or outdoor environment, and these use scene more complicated, size of ambient noise
Differ, and the use of aed equipment is highly dependent on voice guidance, the voice guidance volume of typically commercially available aed equipment is all at present
Fixed-level, or need user to adjust speech volume manually, or some can adjust automatically speech volume, but no
Method is accurately adjusted.Lead to when user is in the larger scene of some noises, such as airport, noisy public place etc. be not it is impossible to hear
The voice instruction of Chu aed, these situations have a strong impact on user and use aed equipment, or even delay defibrillation therapy leads to serious consequence,
When user compares quiet scene, such as hospital, school etc. at some, due to cannot precisely adjust, it is likely to result in huge noise,
Environment around impact.
Content of the invention
Used it is necessary to precisely correctly adjusting defibrillator speech volume for general voice volume adjustment method and instructing based on this
Family uses the problem of defibrillator, provides a kind of defibrillator that can accurately adjust defibrillator speech volume and its speech volume automatic
Control method and device.
A kind of speech volume Automatic adjustment method, comprises the steps:
Environmental noise around collection, obtains environmental noise data；
Described environmental noise data and default noisy samples are compared, obtains closest with described environmental noise data
Default noisy samples；
Read, according to described immediate default noisy samples, the default noisy samples prestoring to export with speech volume
The corresponding relation of parameter simultaneously selects speech volume output parameter corresponding with described immediate default noisy samples, to adjust language
Sound volume.
Wherein in an embodiment, described, described environmental noise data and default noisy samples are compared, obtain
To with the step of the immediate default noisy samples of described environmental noise data before also include calibrating described environmental noise data
Step, specifically include:
Collection is in noise signal during zero noise source environment, obtains drift noise data；
According to described drift noise data to environmental noise data calibration.
Wherein in an embodiment, the environmental noise of described collection surrounding, the step obtaining environmental noise data is concrete
Comprise the steps:
After closing the voice of itself or do not send during voice collection ambient noise；
By a/d transducer, the described environmental noise collecting is converted into the environmental noise data of digital signal form.
Wherein in an embodiment, described default noisy samples with the corresponding relation of described speech volume output parameter are
Obtained by following steps:
Collection environmental noise；
Adjust speech volume output parameter；
The speech volume output parameter of voice can clearly be heard under described environmental noise in record；
Described environmental noise is set up described default noisy samples and described speech volume as described default noisy samples
The corresponding relation of output parameter.
Wherein in an embodiment, the environmental noise of described collection surrounding, the step obtaining environmental noise data is to adopt
The environmental noise of collection zone time section.
A kind of speech volume self-checking device, comprising:
Environmental noise acquisition module, for the environmental noise around collection, obtains environmental noise data；
Default noisy samples choose module, for described environmental noise data and default noisy samples are compared, obtain
To the immediate default noisy samples with described environmental noise data；
Speech volume adjustment module, makes an uproar for reading prestore default according to described immediate default noisy samples
The corresponding relation of sound sample and speech volume output parameter simultaneously selects voice corresponding with described immediate default noisy samples
Volume output parameter, to adjust speech volume.
Wherein in an embodiment, also include the calibration module for calibrating described environmental noise data, described calibration
Module specifically includes:
Drift noise acquiring unit, is in noise signal during zero noise source environment for collection, obtains drift noise number
According to；
Noise data alignment unit, for according to described drift noise data to environmental noise data calibration.
Wherein in an embodiment, described environmental noise acquisition module includes:
Environmental noise collecting unit, for closing after the voice of itself or not sending collection ambient noise during voice；
Environmental noise converting unit, for being converted into numeral letter by a/d transducer by the described environmental noise collecting
The environmental noise data of number form.
Wherein in an embodiment, also include default noisy samples acquisition module, described default noisy samples obtain mould
Block is used for obtaining described default noisy samples, and described default noisy samples acquisition module specifically includes:
Sample noise collecting unit, for gathering environmental noise；
Volume parameters adjustment unit, for adjusting speech volume output parameter；
Data record unit, can clearly hear the speech volume output ginseng of voice under described environmental noise for record
Number；
Sample Establishing unit, for setting up described default noise sample using described environmental noise as described default noisy samples
This corresponding relation with described speech volume output parameter.
Wherein in an embodiment, described environmental noise acquisition module is the environmental noise of pickup area time period.
A kind of automated external defibrillator, automatic using above-mentioned speech volume Automatic adjustment method or the above-mentioned speech volume of inclusion
Adjusting means.
Above-mentioned defibrillator and its speech volume Automatic adjustment method and device, are chosen by contrast and are made an uproar with the environment collecting
The immediate default noisy samples of sound data, adjust defibrillator speech volume output parameter according to this default noisy samples, thus
To adjust defibrillator speech volume, so that defibrillator speech volume is mated most with environmental noise, it is to avoid mechanical
To adjust the size of defibrillator speech volume according to noise level, so above-mentioned defibrillator speech volume Automatic adjustment method and device
Can accurately, automatically adjust defibrillator speech volume.
Brief description
Fig. 1 is the schematic flow sheet of the one of embodiment of speech volume Automatic adjustment method；
Fig. 2 is the schematic flow sheet of the one of embodiment of speech volume Automatic adjustment method；
Fig. 3 is the schematic flow sheet of the one of embodiment of speech volume Automatic adjustment method；
Fig. 4 is the structural representation of the one of embodiment of speech volume self-checking device；
Fig. 5 is the structural representation of the one of embodiment of speech volume self-checking device；
Fig. 6 is the structural representation of the one of embodiment of speech volume self-checking device.
Specific embodiment
In implementation below, it is described in detail, easily taking automated external defibrillator (hereinafter referred to as defibrillator) as a example
Understand, in addition to defibrillator, following speech volume Automatic adjustment method and device can be applied in mobile phone, notebook computer etc.
In electronic equipment.
As shown in figure 1, a kind of speech volume Automatic adjustment method, comprise the steps:
S100: the environmental noise around collection, obtains environmental noise data.
Environmental noise around collection defibrillator can adopt plurality of devices, for example professional environmental noise harvester, makes an uproar
Sound meter or mike etc..Specialty environmental noise harvester can high precision and high sensitivity gather defibrillator around noise,
And automatically acoustical signal can be converted into digital signal, but its equipment is sent out miscellaneous, cost is big, is unfavorable for popularization and application.Noise
Meter can gather and display environment noise, but it equally exists that cost is larger, is unfavorable for the defect of popularization and application, in the present embodiment
The middle equipment being gathered as environmental noise using mike with low cost, will collect sound signal processing and afterwards by general
Acoustical signal is converted into digital signal by logical a/d converter, to process further below.
S300: described environmental noise data and default noisy samples are compared, obtains and described environmental noise data
Immediate default noisy samples.
Default noisy samples are the noisy samples gathering acquisition under varying environment noise, and default noisy samples can be passed through many
Secondary in different environments noise test sampling is carried out to defibrillator, test out the corresponding suitable audio output of various environmental noises
Default noisy samples are cured in the system of defibrillator and preset as default noisy samples by signal volume value afterwards.By step
After rapid s100 collects the environmental noise around defibrillator, environmental noise data is contrasted with default noisy samples, is carried out
The similarity analysis of data, obtain the immediate default noisy samples with described environmental noise data.
S400: read the default noisy samples prestoring and speech volume according to described immediate default noisy samples
The corresponding relation of output parameter simultaneously selects speech volume output parameter corresponding with described immediate default noisy samples, to adjust
Section speech volume.
Defibrillator is stored with the corresponding relation of described default noisy samples and speech volume output parameter, and speech volume exports
Parameter is used for controlling defibrillator speech volume, and speech volume output parameter corresponding with default noisy samples can be by defibrillator language
Sound volume is adjusted to mate with the noisy environment of this default noisy samples, thus adjusting defibrillation according to this speech volume output parameter
Device speech volume, make defibrillator speech volume meet value that current noisy environment servant can catch is it is ensured that user can be clear
Correctly.
Above-mentioned speech volume Automatic adjustment method, is chosen immediate pre- with the environmental noise data collecting by contrast
If noisy samples, adjust defibrillator speech volume output parameter according to this default noisy samples, thus adjusting defibrillator voice
Volume, so that defibrillator speech volume is mated most with environmental noise, it is to avoid mechanical adjusted according to noise level
The size of defibrillator speech volume, thus above-mentioned defibrillator speech volume Automatic adjustment method can accurately, automatically adjust defibrillation
Device speech volume.
As shown in Figure 2,3, wherein in an embodiment, above-mentioned speech volume Automatic adjustment method, step s300 it
Front step s200 that also includes: the step calibrating described environmental noise data.Step s200 is preferably located on step s100 and step
Between rapid s300.
Described step s200 specifically includes:
S220: collection is in noise signal during zero noise source environment, obtains drift noise data.
Zero noise source environment is generally referred to as squelch, noise signal should not had defeated in quiet environment in theory
Go out, but some impacts of electronic circuit itself can produce noise signal, can obtain the zero of defibrillator according to this noise signal
Drift noise data.
S240: according to described drift noise data to environmental noise data calibration.
Remove the defibrillator after described drift noise data can obtain calibration in described defibrillator environmental noise data
Environmental noise data.
As shown in figure 3, wherein in an embodiment, step s100 specifically includes step:
S120: after closing the voice of itself or do not send during voice collection ambient noise.
Because defibrillator itself can send voice, if not closing defibrillator itself before carrying out environmental noise collection
Environmental noise will be treated as in the voice of gatherer process defibrillator if voice to process, bring great error.By defibrillator
Microcontroller may determine that whether defibrillator has broadcasting voice operating, when needing to carry out noise gathering, microprocessor controls
Defibrillator cuts out own voices and plays.It is of course also possible to select defibrillator not send gather ring around described defibrillator during voice
Border noise, can reach same effect.Gather described defibrillator ambient noise and defibrillator can be gathered by mike
Ambient noise.
S140: by a/d transducer, the described environmental noise collecting is converted into the environmental noise of digital signal form
Data.
Environmental noise is converted into the digital signal beneficial to transmission process in digital circuit here by a/d transducer
The noise data of form.
Wherein in an embodiment, described default noisy samples with the corresponding relation of described speech volume output parameter are
It is prepared by the following:
Collection environmental noise.Collection environmental noise said herein refers to gather the environmental noise under multiple varying environments, example
As defibrillator can be put into airport, station, hotel, library etc. varying environment down-sampling environmental noise data by us, place
Reason obtains the default noisy samples in various environment.
Adjust speech volume output parameter.Instruction according to user adjusts the speech volume output parameter of defibrillator (for example
User sends the instruction of adjustment volume by the form of knob, button), thus changing the speech volume of defibrillator.
The speech volume output parameter of voice can clearly be heard under described environmental noise in record.Here, determine currently
The process that can clearly hear described defibrillator voice under environmental noise is to feel judgement by using person to draw, i.e. user
The voice message that defibrillator can clearly be heard, then defibrillator record voice now are represented by the instruction determining to defibrillator
Volume output parameter, such that it is able to set up the corresponding relation of default noisy samples and speech volume output parameter.Simultaneously we
Can judge to draw energy under current environment noise according to the auditory perception of normally people using the machine of imitative human engineering
Enough catch the speech volume of defibrillator, record now defibrillator speech volume output parameter.
Finally described environmental noise is set up described default noisy samples and described voice as described default noisy samples
The corresponding relation of volume output parameter.
Wherein in an embodiment, the environmental noise of described collection surrounding, step s100 obtaining environmental noise data
It is the environmental noise of pickup area time period.
There is the value that fluctuates of certain scope in the environmental noise value in same public arena, sample merely in this environment
The environmental noise data of certain time point cannot precisely draw the default noisy samples the most close with this environment.So in this enforcement
Environmental noise in the pickup area time period in example, can effectively lift the standard of defibrillator speech volume Automatic adjustment method of the present invention
Really property.This described zone time section refers to a period of time, and different from a time, such as 8 points and 8 points of the time spends 5 minutes and is
Common time, and zone time section refers to 8 points to the 8 points times crossing in 5 minutes this section of regions, in the present embodiment,
This zone time section can be 3 seconds or 5 seconds etc..
As shown in figure 4, a kind of speech volume self-checking device, comprising:
Environmental noise acquisition module 100, for the environmental noise around collection, obtains environmental noise data；
Environmental noise acquisition module 100 can gather the environmental noise around defibrillator using plurality of devices, for example specially
The environmental noise harvester of industry, noise apparatuies or mike etc..The environmental noise harvester of specialty being capable of high precision and high sensitivity
Noise around collection defibrillator, and automatically acoustical signal can be converted into digital signal, but its equipment is sent out miscellaneous, cost
Greatly, it is unfavorable for popularization and application.Noise apparatuies can gather and display environment noise, but its to equally exist cost larger, be unfavorable for pushing away
The defect of wide application, adopts mike with low cost as environmental noise acquisition module in the present embodiment, will gather afterwards
Acoustical signal is converted into digital signal, to locate further below to sound signal processing and by common a/d converter
Reason.
Default noisy samples choose module 300, for described environmental noise data and default noisy samples are compared,
Obtain the immediate default noisy samples with described environmental noise data；
Default noisy samples are the noisy samples gathering acquisition under varying environment noise, and default noisy samples can be passed through many
Secondary in different environments noise test sampling is carried out to defibrillator, test out the corresponding suitable audio output of various environmental noises
Default noisy samples are cured in the system of defibrillator and preset as default noisy samples by signal volume value afterwards.By ring
After border noise gathering module 100 collects the environmental noise around defibrillator, default noisy samples are chosen module 300 and environment are made an uproar
Sound data is contrasted with default noisy samples, carries out the similarity analysis of data, obtains connecing most with described environmental noise data
Near default noisy samples.
Speech volume adjustment module 400, pre- for prestored according to described immediate default noisy samples reading
If the corresponding relation of noisy samples and speech volume output parameter simultaneously selects corresponding with described immediate default noisy samples
Speech volume output parameter, to adjust speech volume.
Defibrillator is stored with the corresponding relation of described default noisy samples and speech volume output parameter, and speech volume exports
Parameter is used for controlling defibrillator speech volume, and speech volume output parameter corresponding with default noisy samples can be by defibrillator language
Sound volume is adjusted to mate with the noisy environment of this default noisy samples, and speech volume adjustment module 400 is according to this speech volume
Output parameter adjusts defibrillator speech volume, makes defibrillator speech volume meet what current noisy environment servant can catch
Value is it is ensured that user can understand correctly.
Above-mentioned speech volume self-checking device, is chosen immediate pre- with the environmental noise data collecting by contrast
If noisy samples, adjust defibrillator speech volume output parameter according to this default noisy samples, thus adjusting defibrillator voice
Volume, so that defibrillator speech volume is mated most with environmental noise, it is to avoid mechanical adjusted according to noise level
The size of defibrillator speech volume, thus above-mentioned speech volume self-checking device can correctly, automatically adjust defibrillator voice
Volume.
As shown in Figure 5,6, wherein in an embodiment, described speech volume self-checking device is also included for calibrating
The calibration module 200 of described environmental noise data, described calibration module 200 specifically includes:
Drift noise acquiring unit 220, is in noise signal during zero noise source environment for collection, obtains drift noise
Data；
Zero noise source environment is generally referred to as squelch, noise signal should not had defeated in quiet environment in theory
Go out, but some impacts of electronic circuit itself can produce noise signal, can obtain the zero of defibrillator according to this noise signal
Drift noise data.
Noise data alignment unit 240, for according to described drift noise data to environmental noise data calibration.
Remove the defibrillator after described drift noise data can obtain calibration in described defibrillator environmental noise data
Environmental noise data.
As shown in fig. 6, wherein in an embodiment, described environmental noise acquisition module 100 includes:
Environmental noise collecting unit 120, makes an uproar for closing after the voice of itself or not sending collection surrounding during voice
Sound；
Because defibrillator itself can send voice, if not closing defibrillator itself before carrying out environmental noise collection
Environmental noise will be treated as in the voice of gatherer process defibrillator if voice to process, bring great error.Environmental noise is adopted
By the microcontroller of defibrillator, collection unit 120 may determine that whether defibrillator has broadcasting voice operating, when needing into Row noise
During collection, environmental noise collecting unit 120 is closed own voices by microprocessor controls defibrillator and is play.It is of course also possible to
Select defibrillator not send and during voice, gather described defibrillator ambient noise, same effect can be reached.Environmental noise
Collecting unit 120 gathers described defibrillator ambient noise and can gather defibrillator ambient noise by mike.
Environmental noise converting unit 140, for being converted into numeral by a/d transducer by the described environmental noise collecting
The environmental noise data of signal form.
Environmental noise is converted into the digital signal beneficial to transmission process in digital circuit here by a/d transducer
The noise data of form.
Wherein in an embodiment, above-mentioned speech volume self-checking device also includes default noisy samples and obtains mould
Block, described default noisy samples acquisition module is used for obtaining described default noisy samples, described default noisy samples acquisition module
Specifically include:
Sample noise collecting unit, for gathering environmental noise；Collection environmental noise said herein refer to gather multiple not
With the environmental noise under environment, for example defibrillator can be put into airport, station, hotel, library etc. varying environment by us
Down-sampling environmental noise data, processes the default noisy samples obtaining in various environment.
Volume parameters adjustment unit, for adjusting speech volume output parameter；Specifically volume parameters adjustment unit is
For the speech volume output parameter that adjusts defibrillator according to the instruction of user, (such as user is sent out by the form of knob, button
Go out to adjust the instruction of volume), thus changing the speech volume of defibrillator.
Data record unit, can clearly hear the speech volume output ginseng of voice under described environmental noise for record
Number；
Here, determine that the process that can clearly hear described defibrillator voice under current environment noise is by using person certainly
I feels that judgement draws, user represents, by the instruction determining to defibrillator, the voice message that can clearly hear defibrillator,
Then data record unit record speech volume output parameter now, defeated with speech volume such that it is able to set up default noisy samples
Go out the corresponding relation of parameter.We can also be using the auditory perception according to normally people for the machine imitating human engineering simultaneously
Judge to draw the speech volume that can catch defibrillator under current environment noise, data record unit records now defibrillation
Device speech volume output parameter.
Sample Establishing unit, for setting up described default noise sample using described environmental noise as described default noisy samples
This corresponding relation with described speech volume output parameter.
Wherein in an embodiment, described environmental noise acquisition module is the environmental noise of pickup area time period.
There is the value that fluctuates of certain scope in the environmental noise value in same public arena, sample merely in this environment
The environmental noise data of certain time point cannot precisely draw the default noisy samples the most close with this environment.So in this enforcement
Environmental noise in the pickup area time period in example, can effectively lift the standard of defibrillator speech volume Automatic adjustment method of the present invention
Really property.This described zone time section refers to a period of time, and different from a time, such as 8 points and 8 points of the time spends 5 minutes and is
Common time, and zone time section refers to 8 points to the 8 points times crossing in 5 minutes this section of regions, in the present embodiment,
This zone time section can be 3 seconds or 5 seconds etc..
Embodiment described above only have expressed the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, some deformation can also be made and improve, these broadly fall into the guarantor of the present invention
Shield scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (7)
1. a kind of speech volume Automatic adjustment method of defibrillator is it is characterised in that comprise the steps:
Environmental noise around collection defibrillator, obtains environmental noise data, wherein, the environmental noise of described collection surrounding, obtain
Step to environmental noise data includes:
After closing the voice of itself or do not send during voice collection ambient noise,
By a/d transducer, the described environmental noise collecting is converted into the environmental noise data of digital signal form；
Environmental noise data is calibrated, wherein, the described step that environmental noise data is calibrated, comprising:
Collection is in noise signal during zero noise source environment, obtains drift noise data,
According to described drift noise data to environmental noise data calibration；
Environmental noise data after calibration is carried out similarity with default noisy samples compare, obtain and the environment after described calibration
The immediate default noisy samples of noise data；
Read the default noisy samples prestoring and speech volume output parameter according to described immediate default noisy samples
Corresponding relation and select speech volume output parameter corresponding with described immediate default noisy samples, to adjust voice sound
Amount.
2. speech volume Automatic adjustment method according to claim 1 is it is characterised in that described default noisy samples and institute
State the corresponding relation of speech volume output parameter through the following steps that obtain:
Collection environmental noise；
Adjust speech volume output parameter；
The speech volume output parameter of voice can clearly be heard under described environmental noise in record；
Described environmental noise is set up described default noisy samples and described speech volume output as described default noisy samples
The corresponding relation of parameter.
3. speech volume Automatic adjustment method according to claim 1 is it is characterised in that around described collection defibrillator
Environmental noise, the step obtaining environmental noise data is the environmental noise of pickup area time period.
4. a kind of speech volume self-checking device of defibrillator is it is characterised in that include:
Environmental noise acquisition module, for gathering the environmental noise around defibrillator, obtains environmental noise data, wherein, described
Environmental noise acquisition module includes:
Environmental noise collecting unit, for closing after the voice of itself or not sending collection ambient noise during voice,
Environmental noise converting unit, for being converted into digital signal shape by a/d transducer by the described environmental noise collecting
The environmental noise data of formula；
Calibration module, for calibrating described environmental noise data, wherein, described calibration module specifically includes:
Drift noise acquiring unit, is in noise signal during zero noise source environment for collection, obtains drift noise data,
Noise data alignment unit, for according to described drift noise data to environmental noise data calibration；
Default noisy samples choose module, for the environmental noise data after calibration is carried out similarity ratio with default noisy samples
Right, obtain and the immediate default noisy samples of environmental noise data after described calibration；
Speech volume adjustment module, for the default noise sample being prestored according to described immediate default noisy samples reading
This corresponding relation with speech volume output parameter simultaneously selects speech volume corresponding with described immediate default noisy samples
Output parameter, to adjust speech volume.
5. speech volume self-checking device according to claim 4 obtains it is characterised in that also including default noisy samples
Delivery block, described default noisy samples acquisition module is used for obtaining described default noisy samples, and described default noisy samples obtain
Module specifically includes:
Sample noise collecting unit, for gathering environmental noise；
Volume parameters adjustment unit, for adjusting speech volume output parameter；
Data record unit, can clearly hear the speech volume output parameter of voice under described environmental noise for record；
Sample Establishing unit, for using described environmental noise as described default noisy samples set up described default noisy samples with
The corresponding relation of described speech volume output parameter.
6. speech volume self-checking device according to claim 4 is it is characterised in that described environmental noise acquisition module
It is the environmental noise of pickup area time period.
7. a kind of automated external defibrillator is it is characterised in that adopt the defibrillator described in any one in claims 1 to 3
In speech volume Automatic adjustment method or inclusion claim 4 to 6, the speech volume of the defibrillator described in any one is adjusted automatically
Regulating device.
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| CN112634916A (en) * | 2020-12-21 | 2021-04-09 | 久心医疗科技（苏州）有限公司 | Automatic voice adjusting method and device for defibrillator |
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| CN201499139U (en) * | 2009-07-06 | 2010-06-02 | 刘庆煜 | Volume automatic regulation system and parking lot access control device |
| CN102065260A (en) * | 2010-11-15 | 2011-05-18 | 冠捷显示科技（厦门）有限公司 | Background environment change-based television for automatically adjusting volume |
| CN102404430A (en) * | 2010-09-13 | 2012-04-04 | 富泰华工业（深圳）有限公司 | Mobile communication device and method for improving speech quality thereof |
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| CN201499139U (en) * | 2009-07-06 | 2010-06-02 | 刘庆煜 | Volume automatic regulation system and parking lot access control device |
| CN102404430A (en) * | 2010-09-13 | 2012-04-04 | 富泰华工业（深圳）有限公司 | Mobile communication device and method for improving speech quality thereof |
| CN102065260A (en) * | 2010-11-15 | 2011-05-18 | 冠捷显示科技（厦门）有限公司 | Background environment change-based television for automatically adjusting volume |
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