CN108260069A - The debugging system and method for a kind of noise cancelling headphone - Google Patents
The debugging system and method for a kind of noise cancelling headphone Download PDFInfo
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- CN108260069A CN108260069A CN201810063916.XA CN201810063916A CN108260069A CN 108260069 A CN108260069 A CN 108260069A CN 201810063916 A CN201810063916 A CN 201810063916A CN 108260069 A CN108260069 A CN 108260069A
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- earphone
- noise reduction
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- noise
- control unit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1083—Reduction of ambient noise
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
One aspect of the present invention provides the debugging system and method for a kind of noise cancelling headphone, including：Test cell, comparing unit, control unit and writing unit, the debugging system of the present invention by adjusting yield value and filtering parameter simultaneously, avoid the acoustical passage transmission function of microphone and loudspeaker in earphone it is not quite identical and the problem of lead to the noise abatement differentiation of earphone, it ensure that the noise abatement of all earphones is consistent, the manual debugging in test process is avoided, ensure that the quality of earphone, and, entire test process automation is enabled to, is used manpower and material resources sparingly.
Description
Technical field
The present invention relates to technical field of acoustics.More particularly, to the debugging system and method for a kind of noise cancelling headphone.
Background technology
Noise cancelling headphone carries out ANC (Active Noise Cancellation, active noise suppression) performance in volume production at present
It is that the entire gain of filter circuit is adjusted mostly by the way of during debugging, and the parameter of wave filter immobilizes, and comes
The transmission function of different earphones is matched, the method is opposite for volume production to be easier to realize, but due to noise cancelling headphone
And the difference of the consistency of ANC, MIC, only gain is adjusted, can cause part earphone ANC performances can not meet demand,
It is bad so as to cause product.
Invention content
At least one to solve the above-mentioned problems, one aspect of the present invention provides a kind of debugging system of noise cancelling headphone,
Including：
Test cell is connect with earphone to be measured, tests the noise reduction of earphone to be measured；
The noise reduction of comparing unit, relatively more default qualified noise reduction and test cell test determines the noise reduction water of earphone to be measured
It is flat；
Control unit, according to the noise abatement of earphone to be measured select noise reduction parameters, the noise reduction parameters include yield value and
Filtering parameter；
Writing unit, receives the noise reduction parameters of described control unit selection, and is written into earphone to be measured.
Preferably, described control unit is configured as：
When it is unqualified that the comparing unit, which determines the noise abatement of earphone to be measured, described control unit changes noise reduction ginseng
Number, and pass through said write unit and re-write earphone to be measured；
When it is qualified that the comparing unit, which determines the noise abatement of earphone to be measured, described control unit joins current noise reduction
Number is burned onto earphone to be measured by writing unit.
Preferably, the system also includes memory, the memory prestores multiple yield values and multiple filtering parameters；
Described control unit is configured as selecting one of multiple filtering parameters first, for the filtering parameter of selection, selection
One of multiple yield values；
Alternatively, described control unit is configured as selecting one of multiple yield values first, for the yield value of selection, selection
One of multiple filtering parameters.
Preferably, described control unit is configured as：
Median of the filtering parameter that described control unit selects for the first time for the multiple filtering parameter.
Preferably, described control unit is configured as：
Median of the yield value that described control unit selects for the first time for the multiple yield value.
Another aspect of the present invention provides a kind of adjustment method of noise cancelling headphone, including：
Test the noise reduction of earphone to be measured；
The noise reduction for comparing default qualified noise reduction and test cell test determines the noise abatement of earphone to be measured；
Noise reduction parameters are selected according to the noise abatement of earphone to be measured, the noise reduction parameters include yield value and filtering parameter；
The noise reduction parameters of selection are received, and are written into earphone to be measured.
Preferably, the method includes：
When it is unqualified to determine the noise abatement of earphone to be measured, change noise reduction parameters, and by the noise reduction parameters weight of change
Earphone to be measured is newly written；
When the noise abatement for determining earphone to be measured is qualified, current noise reduction parameters are burned onto earphone to be measured.
Preferably, the method further includes：Prestore multiple yield values and multiple filtering parameters；
It is described to select noise reduction parameters to select one of multiple filtering parameters first, for the filtering parameter of selection, select more
One of a yield value；
Alternatively, described select noise reduction parameters to select one of multiple yield values first, for the yield value of selection, select more
One of a filtering parameter.
Preferably, in the selection noise reduction parameters, the filtering parameter selected for the first time is in the multiple filtering parameter
Digit.
Preferably, in the selection noise reduction parameters, the median of the yield value that selects for the first time for the multiple yield value.
Beneficial effects of the present invention are as follows：
The present invention provides a kind of debugging system and method for noise cancelling headphone, by being adjusted simultaneously to yield value and filtering parameter
It is not quite identical and cause the noise abatement of earphone poor to avoid the acoustical passage transmission function of microphone and loudspeaker in earphone for section
The problem of alienation, ensure that the noise abatement of all earphones is consistent, avoid the manual debugging in test process, ensure that earphone
Quality, further, it is possible to which so that entire test process automation, uses manpower and material resources sparingly.
Description of the drawings
The specific embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 shows the schematic diagram of the noise cancelling headphone debugging system in one embodiment of the present invention.
Fig. 2 shows the flow charts of the noise cancelling headphone adjustment method in one embodiment of the present invention.
Specific embodiment
In order to illustrate more clearly of the present invention, the present invention is done further with reference to preferred embodiments and drawings
It is bright.Similar component is indicated with identical reference numeral in attached drawing.It will be appreciated by those skilled in the art that institute is specific below
The content of description is illustrative and be not restrictive, and should not be limited the scope of the invention with this.
The various sectional views that embodiment is disclosed according to the present invention are shown in the drawings.It is drawn to scale that these figures, which are not,
, wherein for the purpose of clear expression, certain details are exaggerated, and certain details may be omitted.Shown in figure
Various regions, the shape of layer and relative size between them, position relationship are only exemplary, in practice may be due to system
It makes tolerance or technology restriction and is deviated, and in addition those skilled in the art can be designed according to actually required with not similar shape
Shape, size, the regions/layers of relative position.
Known in the art, outside noise signal is by two propagateds to human ear, and one is acoustic propagation, one
For electron-propagation, perfect condition is that the amplitude of signal c and d of the noise behind two paths is identical, and opposite in phase mutually supports
Disappear, noise is eliminated.There is no remaining noise signal e after mixing.In acoustic investigation field, the biography of noise signal e/ signals d
Delivery function is noise reduction system sensitivity function S, i.e. S=e/d, in addition, e/d=(P+GH)/P, wherein, P is the Mike in earphone
Wind is to the acoustical passage transmission function of eardrum, and G is acoustical passage transmission function of the loudspeaker in earphone to eardrum, and H is noise reduction electricity
Road response coefficient.Therefore, noise reduction is realized by the interference cancellation in GH paths and P paths.
In the prior art, multiple Dolby circuit yield values to prestore are set in memory, every time one increasing of test selection
Benefit value, after noise reduction is tested, noise reduction then judges qualification in acceptability limit.But problem is in different earphones,
Its G is not fully consistent with the value of P, can fluctuate in a certain range, and during the adjustment of existing noise cancelling headphone, the parameter of wave filter
It immobilizes, the inconsistent earphone of acoustical passage transmission function can not be coped with, the volume production of noise cancelling headphone is affected greatly,
Cause product quality irregular.
In view of this, one aspect of the present invention provides a kind of debugging system of noise cancelling headphone, as shown in Figure 1, of the invention
One side a kind of debugging system of noise cancelling headphone is provided, including：
Test cell 1 is connect with earphone 5 to be measured, tests the noise reduction of earphone 5 to be measured；
The noise reduction that comparing unit 2, relatively more default qualified noise reduction and test cell 1 are tested determines the drop of earphone 5 to be measured
It makes an uproar level；
Control unit 3 selects noise reduction parameters according to the noise abatement of earphone 5 to be measured, and the noise reduction parameters include yield value
And filtering parameter；
Writing unit 4 receives the noise reduction parameters that described control unit 3 selects, and is written into earphone 5 to be measured.
In debugging system in present aspect, by being adjusted simultaneously to yield value and filtering parameter, wheat in earphone is avoided
The acoustical passage transmission function of gram wind and loudspeaker is not quite identical and the problem of lead to the noise abatement differentiation of earphone, ensure that
The noise abatement of all earphones is consistent, avoids the manual debugging in test process, ensure that the quality of earphone, further, it is possible to
Cause entire test process automation, use manpower and material resources sparingly.
Wherein, this field understands, the filtering parameter is according to variable quantity (the above-mentioned P of the transmission function phase of earphone 5 to be measured
With the value of G) and fluctuation range determine.
Optionally, described control unit 3 is configured as：
When it is unqualified that the comparing unit 2, which determines the noise abatement of earphone 5 to be measured, described control unit 3 changes drop
It makes an uproar parameter, and passes through said write unit 4 and re-write earphone 5 to be measured；
When it is qualified that the comparing unit 2, which determines the noise abatement of earphone 5 to be measured, described control unit 3 will currently drop
Parameter of making an uproar is burned onto earphone 5 to be measured by writing unit 4.
Qualification noise reduction is preset in comparing unit 2, when comparing unit 2 receives the noise reduction that test cell 1 exports, is compared
The noise reduction is compared unit 2 with preset qualified noise reduction, when the noise reduction is less than qualified noise reduction, comparing unit
2 outputs determine that the noise abatement of earphone 5 to be measured is underproof order, and control unit 3 receives the unqualified order at this time, and changes
Become noise reduction parameters, earphone 5 to be measured is written by writing unit 4 again, test cell 1 is tested again, until comparing unit 2
Output determines that the noise abatement of earphone 5 to be measured is qualified order, and current noise reduction parameters are passed through writing unit by control unit 3
4 are burnt in earphone 5 to be measured.
Preferably, the system also includes memory, the memory prestores multiple yield values and multiple filtering parameters.Institute
It states control unit 3 to be configured as selecting one of multiple filtering parameters first, for the filtering parameter of selection, selects multiple yield values
One of；Wherein, the change of filtering parameter needs to switch corresponding filter circuit, therefore, selects one of multiple filtering parameters first
The number of switching filter circuit is advantageously reduced, so as to simplify testing and measuring technology.
Certainly, selectable, described control unit 3 can also be configured as selecting one of multiple yield values first, for
The yield value of selection selects one of multiple filtering parameters.
In addition, in a preferred embodiment of present aspect, described control unit 3 is configured as：
Median of the filtering parameter that described control unit 3 selects for the first time for the multiple filtering parameter.
It, can clear and definite adjustment direction, reduction adjustment in the adjustment of preceding filtering parameter twice in the preferred embodiment
Number.Specifically, when being completed all preset yield values in the case that filtering parameter is median, if test is not yet
Unqualified, then the filtering parameter that can be chosen for the second time more than or less than median is tested, and is chosen and is more than with second
For median, if during second is tested, if it find that the larger noise reduction of filtering parameter is big under same yield value, that is, illustrate
The selected directions of filtering parameter are correct, and the selected directions of follow-up filtering parameter are direction bigger than previous filtering parameter successively,
Conversely, then illustrating the selected directions mistake of filtering parameter, i.e., the selected directions of filtering parameter are successively than previous filtering parameter
Small direction.
Compared to selecting in order from big to small or from small to large, above-mentioned preferred embodiment reduces time of selection
The step of counting, optimizing testing and measuring technology.
Similar to a upper embodiment, described control unit 3 is configured as：The increasing that described control unit 3 selects for the first time
Median of the benefit value for the multiple yield value.The present invention repeats no more.
In addition, another aspect of the present invention provides a kind of adjustment method of noise cancelling headphone, as shown in Fig. 2,
S101：Test the noise reduction of earphone to be measured；
Wherein, test cell is connect with earphone to be measured, tests the noise reduction of current earphone to be measured.
S102：The noise reduction for comparing default qualified noise reduction and test cell test determines the noise abatement of earphone to be measured；
In this step, qualified noise reduction is preset in comparing unit, is exported by the qualification noise reduction and test cell
Noise reduction be compared, export and determine that the noise abatement of earphone to be measured is qualified or underproof order.
S103：Noise reduction parameters are selected according to the noise abatement of earphone to be measured, the noise reduction parameters include yield value and filtering
Parameter；
In the step, order of the control unit in previous step selects noise reduction parameters.
Specifically, when the order in previous step is unqualified, control unit changes noise reduction parameters.When previous step
When ordering as qualification, control unit exports the noise reduction parameters, and exports the signal for determining burning.
S104：The noise reduction parameters of selection are received, and are written into earphone to be measured.
Specifically, when control unit exports unchanged de-noising signal, and export the signal for determining burning, writing unit
Current noise reduction parameters are burned onto earphone to be measured；
When the de-noising signal that control unit output changes, and the signal of write-in is exported, writing unit joins current noise reduction
Number is written to earphone to be measured, it should be noted that the write-in signal can be wiped when being written next time.
By above-mentioned adjustment method, it is not quite identical to avoid the acoustical passage transmission function of microphone and loudspeaker in earphone
And the problem of leading to the noise abatement differentiation of earphone, it ensure that the noise abatement of all earphones is consistent, avoid test process
In manual debugging, the quality of earphone is ensure that, further, it is possible to which so that entire test process automation, uses manpower and material resources sparingly.
Preferably, the method further includes：Prestore multiple yield values and multiple filtering parameters；
Optionally, can be prestored multiple yield values and multiple filtering parameters by memory.
It is described to select noise reduction parameters to select one of multiple filtering parameters first, for the filtering parameter of selection, select more
One of a yield value；
Alternatively, described select noise reduction parameters to select one of multiple yield values first, for the yield value of selection, select more
One of a filtering parameter.
In addition, in a preferred embodiment of present aspect, in noise reduction parameters are selected, the filtering parameter that selects for the first time
Median for the multiple filtering parameter.
It, can clear and definite adjustment direction, reduction adjustment in the adjustment of preceding filtering parameter twice in the preferred embodiment
Number.
Specifically, when being completed all preset yield values in the case that filtering parameter is median, if test
Unqualified not yet, then the filtering parameter that can be chosen for the second time more than or less than median is tested, and is chosen with second
For median, if during second is tested, if it find that the larger noise reduction of filtering parameter is big under same yield value, i.e.,
Illustrate that the selected directions of filtering parameter are correct, the selected directions of follow-up filtering parameter are side bigger than previous filtering parameter successively
To conversely, then illustrating the selected directions mistake of filtering parameter, i.e., the selected directions of filtering parameter is join than previous filtering successively
The small direction of number.
Compared to selecting in order from big to small or from small to large, above-mentioned preferred embodiment reduces time of selection
The step of counting, optimizing testing and measuring technology.
Similar to a upper embodiment, in the selection noise reduction parameters, the yield value selected for the first time is the multiple
The median of yield value.The present invention repeats no more.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention for those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways, all embodiments can not be exhaustive here, it is every to belong to this hair
The obvious changes or variations that bright technical solution is extended out are still in the row of protection scope of the present invention.
Claims (10)
1. a kind of debugging system of noise cancelling headphone, which is characterized in that including：
Test cell is connect with earphone to be measured, tests the noise reduction of earphone to be measured；
The noise reduction of comparing unit, relatively more default qualified noise reduction and test cell test determines the noise abatement of earphone to be measured；
Control unit selects noise reduction parameters according to the noise abatement of earphone to be measured, and the noise reduction parameters include yield value and filtering
Parameter；
Writing unit, receives the noise reduction parameters of described control unit selection, and is written into earphone to be measured.
2. system according to claim 1, which is characterized in that described control unit is configured as：
When it is unqualified that the comparing unit, which determines the noise abatement of earphone to be measured, described control unit changes noise reduction parameters,
And pass through said write unit and re-write earphone to be measured；
When it is qualified that the comparing unit, which determines the noise abatement of earphone to be measured, described control unit leads to current noise reduction parameters
It crosses writing unit and is burned onto earphone to be measured.
3. system according to claim 1 or claim 2, which is characterized in that the system also includes memory, the memory prestores
Multiple yield values and multiple filtering parameters；
Described control unit is configured as selecting one of multiple filtering parameters first, for the filtering parameter of selection, selects multiple
One of yield value；
Alternatively, described control unit is configured as selecting one of multiple yield values first, for the yield value of selection, select multiple
One of filtering parameter.
4. system according to claim 3, which is characterized in that described control unit is configured as：
Median of the filtering parameter that described control unit selects for the first time for the multiple filtering parameter.
5. system according to claim 3, which is characterized in that described control unit is configured as：
Median of the yield value that described control unit selects for the first time for the multiple yield value.
6. a kind of adjustment method of noise cancelling headphone, which is characterized in that including：
Test the noise reduction of earphone to be measured；
The noise reduction for comparing default qualified noise reduction and test cell test determines the noise abatement of earphone to be measured；
Noise reduction parameters are selected according to the noise abatement of earphone to be measured, the noise reduction parameters include yield value and filtering parameter；
The noise reduction parameters of selection are received, and are written into earphone to be measured.
7. according to the method described in claim 6, it is characterized in that, the method includes：
When the noise abatement for determining earphone to be measured is unqualified, change noise reduction parameters, and the noise reduction parameters of change are write again
Enter earphone to be measured；
When the noise abatement for determining earphone to be measured is qualified, current noise reduction parameters are burned onto earphone to be measured.
8. the method described according to claim 6 or 7, which is characterized in that the method further includes：Prestore multiple yield values and more
A filtering parameter；
It is described to select noise reduction parameters to select one of multiple filtering parameters first, for the filtering parameter of selection, select multiple increasings
One of benefit value；
Alternatively, described select noise reduction parameters to select one of multiple yield values first, for the yield value of selection, multiple filters are selected
One of wave parameter.
9. according to the method described in claim 8, it is characterized in that, in the selection noise reduction parameters, the filtering that selects for the first time
Parameter is the median of the multiple filtering parameter.
10. according to the method described in claim 8, it is characterized in that, in the selection noise reduction parameters, the gain that selects for the first time
It is worth the median for the multiple yield value.
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| CN201810063916.XA CN108260069A (en) | 2018-01-23 | 2018-01-23 | The debugging system and method for a kind of noise cancelling headphone |
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Application publication date: 20180706 |