CN108200508A - Earphone grip force calibration system and method - Google Patents
Earphone grip force calibration system and method Download PDFInfo
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- CN108200508A CN108200508A CN201810304346.9A CN201810304346A CN108200508A CN 108200508 A CN108200508 A CN 108200508A CN 201810304346 A CN201810304346 A CN 201810304346A CN 108200508 A CN108200508 A CN 108200508A
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- 238000000034 method Methods 0.000 title claims abstract description 57
- 238000012545 processing Methods 0.000 claims abstract description 16
- 238000005259 measurement Methods 0.000 claims description 31
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- 238000004458 analytical method Methods 0.000 claims description 13
- 238000012216 screening Methods 0.000 claims description 12
- 230000009467 reduction Effects 0.000 abstract description 34
- 238000013461 design Methods 0.000 abstract description 9
- 238000005242 forging Methods 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 abstract description 3
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- 230000005540 biological transmission Effects 0.000 description 21
- 101150087667 spk1 gene Proteins 0.000 description 12
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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
- 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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
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Abstract
The present invention provides a kind of earphone grip force calibration system and method, is related to earphone noise reduction field, and earphone grip force calibration system includes grip force measuring system, acoustic characteristic measuring system, data processing system and earphone to be measured；Earphone to be measured is connect respectively with grip force measuring system and acoustics characteristic measuring system, and acoustic characteristic measuring system is also connect with data processing system.Compared with determining the method for grip force under the national grip force standard max of existing foundation and forging cost, the passive oise insulation factor under different grip force can be quantified based on the method that grip force calibration system determines grip force；Frequency response curve of the transaudient characteristic under different grip force in earphone cavity can also be constructed simultaneously, quantify the influence of grip force transaudient characteristic to earphone.Grip force determines method by quantifying influence of the grip force to passive noise reduction and active noise reduction so that active noise reduction headset designs person can obtain the corresponding grip force value of optimal acoustic characteristic, lay the foundation for the design of active noise reduction system, and party's forensic science, easy to implement.
Description
Technical field
The present invention relates to ear phone technologies and active noise reduction field, and in particular, to a kind of earphone grip force calibration system and side
Method.
Background technology
Active noise reduction earphone combines passive noise reduction technology and active noise reduction techniques, and passive noise reduction is using the side passively to insulate against sound
Formula obstruct high frequency section noise, active noise reduction be directed in, low-frequency noise, using secondary sound source produce it is equal with noise amplitude,
The de-noising sound wave of opposite in phase, noise sound wave generate interference with de-noising sound wave, eliminate noise.What passively noise reduction was implemented is more thorough,
The enforcement difficulty of active noise reduction is smaller, and noise cancelling headphone de-noising effect is better.
For wear-type active noise reduction earphone, when wearing, is susceptible to the seal of the situation, at this time earmuff of earphone loosening
Decline, passive anti-acoustic capability declines；The acoustic characteristic of earphone inside cavity can also change simultaneously, based on the operatic tunes before variation
The filter circuit active noise reduction performance of acoustic characteristic design also declines therewith.The reason of the above situation occurs is earphone heads
Beam grip force is less than normal, but grip force can not be excessive, be on the one hand since there is upper limit standard in country for earphone heads beam grip force, it is another
Aspect, excessive grip force can influence the comfort level of earphone wearing.
For how to determine the size issue of active noise reduction earphone heads beam grip force, existing method is not surpassed in guarantee grip force
In the case of crossing national standard and considering earphone heads beam forging cost, the grip force value of head beam is determined.The determining method of above-mentioned grip force
Although simple, influence of the head beam grip force to passive noise reduction and active noise reduction performance is not considered.To demarcate active noise reduction earphone
Head beam grip force, it is thus necessary to determine that influence of the grip force to the acoustic characteristic in earphone cavity, and then quantify grip force and passive noise reduction, master
Relationship between dynamic noise reduction.
Invention content
In view of this, the purpose of the present invention is to provide a kind of earphone grip force calibration system and method, to solve existing skill
The problem of earphone grip force is determined without forensic science in art.
In a first aspect, the embodiment of the present invention provides a kind of earphone grip force calibration system, it is special including grip force measuring system, acoustics
Property measuring system, data processing system and earphone to be measured；
The earphone to be measured is connect respectively with the grip force measuring system and the acoustic characteristic measuring system, the sound
Characteristic measuring system is learned also to connect with the data processing system.
Further, the grip force measuring system includes sequentially connected grip force measuring device and display device；
Distance realizes the change of grip force between two head-shields of the grip force measuring device by changing the earphone to be measured
Change；
The display device shows the current grip force value of the earphone to be measured.
Further, the grip force measuring device can fix the earphone to be measured under different grip force.
Further, the acoustic measurement system includes sound detection device, sound-producing device and data acquisition device；
The sound detection device, sound-producing device are both placed in any earmuff of the earphone to be measured；
The sound detection device is individually connect with the data acquisition device；Or, the sound detection device, the hair
Acoustic device is connect with the data acquisition device.
Further, the sound detection device is no less than 1.
Further, the data processing system includes sequentially connected storage unit, computing unit and output unit；
The computing unit includes data prediction, modeling, analytic function.
Second aspect, the embodiment of the present invention provide a kind of earphone grip force scaling method, including：
Under a certain grip force value, the main channel of earphone to be measured and the measurement data of secondary channel are acquired respectively；
Based on measurement data, the transaudient characteristic model of main channel and secondary channel is established respectively；
Above-mentioned two step is repeated, respectively obtains the main channel under multiple grip force values and the transaudient characteristic mould of secondary channel
Type；
Based on the main channel under multiple grip force values and the transaudient characteristic model of secondary channel, main channel is established respectively and secondary is led to
The transaudient characterisitic family that road changes with grip force value；
Based on transaudient characterisitic family, the earphone clip force value to be measured is determined using transaudient characteristic analysis method.
Further, the transaudient characteristic model for establishing the main channel and secondary channel, specifically includes：
The transaudient characteristic model of main channel and secondary channel is established using least square class parameter identification method.
Further, it is described to determine the earphone clip force value to be measured using transaudient characteristic analysis method, it specifically includes：
Corresponding grip force value set A is determined using main channel characteristic screening method；
For grip force value set A, optimal grip force value is determined using secondary channel screening method.
Further, it is described to determine corresponding grip force value set A using main channel characteristic screening method, it specifically includes：
The corresponding transaudient characteristic curve in main channel of each grip force value is compared with the transaudient characteristic upper limit curve in main channel；
No more than the as qualified curve of the transaudient characteristic curve of the upper limit curve on any frequency point, and remember its correspondence
Grip force value be A1；
Above-mentioned two step is repeated, obtains qualified grip force value set A={ A1, A2 ... An }；Wherein n expressions meet condition
Grip force value number.
Further, it is described to determine optimal grip force value using secondary channel screening method, it specifically includes：
By the transaudient characteristic curve of secondary channel and secondary channel, nominally transaudient characteristic curve carries out similarity analysis；
The corresponding grip force value of the transaudient characteristic curve of secondary channel for determining similarity maximum is optimal grip force value.
It is further, described that by the transaudient characteristic curve of secondary channel, nominally transaudient characteristic curve progress is similar to secondary channel
Degree analysis, specifically includes：
The secondary channel acoustic characteristic curve spk with the nominal curve spk0 is aligned using alignment algorithm, is obtained
Curve spk ' after alignment；
According to the curve skp ' after the alignment, similarity Sn is calculated.
Further, the alignment algorithm is：Determine real number k so that | | spk0-k × spk | |2Value it is minimum, it is described right
Curve skp ＇=k × spk after neat.
Further, the similarity Sn=| | skp0-skp ＇ | |2。
The present invention provides a kind of earphone grip force calibration system and method, and earphone grip force calibration system includes grip force and measures system
System, acoustic characteristic measuring system, data processing system and earphone to be measured；Earphone to be measured respectively with grip force measuring system and
Acoustic characteristic measuring system connects, and acoustic characteristic measuring system is also connect with data processing system.It is pressed from both sides with existing according to country
It determines that the method for grip force is compared under power standard max and forging cost, the side of grip force is determined based on above-mentioned earphone grip force calibration system
Method can quantify the passive oise insulation factor under different grip force；The transaudient characteristic in earphone cavity can also be constructed simultaneously in different folders
Frequency response curve under power quantifies the influence of grip force transaudient characteristic to earphone.Above-mentioned grip force determines method by quantifying grip force to quilt
The influence of dynamic noise reduction and active noise reduction so that active noise reduction headset designs person can obtain the corresponding grip force of optimal acoustic characteristic
Value lays the foundation for the design of active noise reduction system, and party's forensic science, easy to implement.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that being understood by implementing the present invention.The purpose of the present invention and other advantages are in specification, claims
And specifically noted structure is realized and is obtained in attached drawing.
For the above objects, features and advantages of the present invention is enable to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 shows a kind of earphone grip force calibration system structure diagram that the embodiment of the present invention 1 provides；
In a kind of earphone grip force calibration system provided Fig. 2 shows the embodiment of the present invention 1, the connection of grip force measuring system is shown
It is intended to；
Fig. 3 shown in a kind of earphone grip force calibration system that the embodiment of the present invention 1 provides, acoustic characteristic measuring system the
A kind of connection diagram；
Fig. 4 shown in a kind of earphone grip force calibration system that the embodiment of the present invention 1 provides, acoustic characteristic measuring system the
Two kinds of connection diagrams；
Fig. 5 shows in a kind of earphone grip force calibration system that the embodiment of the present invention 1 provides that data processing system structure is shown
It is intended to；
Fig. 6 shows a kind of earphone grip force scaling method flow chart of steps that the embodiment of the present invention 2 provides.
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
The technical solution in the embodiment of the present invention is clearly and completely described in middle attached drawing, it is clear that described embodiment is only
It is part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is real
Applying the component of example can be configured to arrange and design with a variety of different.Therefore, below to provide in the accompanying drawings the present invention
The detailed description of embodiment is not intended to limit the range of claimed invention, but is merely representative of the selected reality of the present invention
Apply example.Based on the embodiment of the present invention, institute that those skilled in the art are obtained under the premise of creative work is not made
There is other embodiment, shall fall within the protection scope of the present invention.
In the description of the present invention unless specifically defined or limited otherwise, term " first ", " second " are only used for describing
Purpose, and it is not intended that instruction or hint relative importance.Term " installation ", " connected ", " connection " should be interpreted broadly, example
Such as, it may be fixed connection or may be dismantle connection, or integral connection；Can be mechanically connected or be electrically connected
It connects；It can be directly connected, can also be indirectly connected by intermediary, can be the connection inside two elements.For this
For the those of ordinary skill in field, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
Embodiment 1
Earphone grip force calibration system structure diagram as shown in Figure 1, the present invention provide a kind of earphone grip force calibration system,
Including grip force measuring system 100, acoustic characteristic measuring system 200, data processing system 300 and earphone to be measured 400；It is to be measured
Amount earphone 400 is connect respectively with grip force measuring system 100 and acoustics characteristic measuring system 200, and acoustic characteristic measuring system 200 is also
It is connect with data processing system 300.Grip force measuring system 100 is used to measure the current grip force value of earphone 400 to be measured, while profit
Measure the acoustic characteristic of earphone 400 to be measured with acoustic characteristic measuring system 200, and by relevant data transfer to data
Processing system 300, data processing system 300 are processed above-mentioned measurement data, and the earphone to be measured is obtained after calculating and is being worked as
Acoustic transmission properties curve under preceding grip force.
In one embodiment, 100 connection diagram of grip force measuring system as shown in Figure 2, above-mentioned grip force measure system
System 100 includes the grip force measuring device 110 of connection and display device 120；Grip force measuring device 110 is by changing earphone to be measured
Distance realizes the variation of grip force between 400 two head-shields；Display device 120 shows the current grip force value of earphone 400 to be measured.
Earphone 400 to be measured is connect with grip force measuring system 100, and grip force measuring device 120 can linearly change earphone 400 to be measured
The distance between two head-shields, the change of the corresponding grip force of change of distance, grip force measuring device 120 can change pressure signal
For electric signal transmission to display device 120, display device 120 shows the electric signal corresponding pressure value.
In one embodiment, grip force measuring device 110 can fix earphone 400 to be measured under different grip force.
By fixing earphone 400 to be measured under a certain grip force, sound of the acoustic measurement system 200 to earphone 400 to be measured can be facilitated
The acquisition of performance data is learned, and ensures the reasonability of institute's gathered data.
In one embodiment, acoustic characteristic measuring system connection diagram as shown in Figure 3 and Figure 4, acoustic measurement
System 200 includes sound detection device 210, sound-producing device 220 and data acquisition device 230；Sound detection device 210, sounding
Device 220 is both placed in any earmuff of earphone 400 to be measured；Sound detection device 210 can individually and data acquisition device
230 connections；Or, sound detection device 210 will respectively be connect with sound-producing device 220 with data acquisition device 230.
In one embodiment, sound detection device 210 is no less than 1.Sound detection device 210 depends on measurement pair
As.
In one embodiment, refering to what is shown in Fig. 3, preferably, having 1 sound measurement device.Sound measurement device one
2101st, sound-producing device 220 is connect respectively with data acquisition device 230, and the acoustic characteristic measuring system 100 comprising above device can
For measuring the transaudient characteristic of active noise reduction earphone secondary channel.
In one embodiment, refering to what is shown in Fig. 4, preferably, having 2 sound measurement devices.Sound measurement device one
2101st, sound measurement device 2 2102, connect respectively with data acquisition device 230, acoustic characteristic comprising above device measures
System 100 can be used for measuring the transaudient characteristic of active noise reduction earphone main channel.
Preferably, sound detection device 210 is determined as microphone, and generating means 220 is loud speaker.
In an embodiment mode, as shown in figure 5, data processing system 300 includes sequentially connected storage unit
310th, computing unit 320 and output unit 330.Computing unit 320 includes data prediction, the functions such as modeling, analysis.Storage
For storing the measurement data from acoustic characteristic measuring system 200, computing unit 320 receives from storage unit unit 310
310 measurement data pre-processes measurement data, is modeled, is analyzed and obtains result of calculation, which is transmitted to defeated
Go out unit 330, result of calculation is exported by output unit 330.
Embodiment 2
The present embodiment is based on the earphone grip force calibration system proposed in embodiment 1, and with reference to figure 6, the present invention proposes a kind of ear
Machine grip force scaling method includes the following steps：
S10：Under a certain grip force value, the main channel of earphone to be measured and the measurement data of secondary channel are acquired respectively；
S20：Based on measurement data, the transaudient characteristic model of main channel and secondary channel is established respectively；
S30：Repeat the above steps S10, S20, respectively obtains main channel under multiple grip force values and secondary channel is transaudient
Characteristic model；
S40：Based on the main channel under multiple grip force values and the transaudient characteristic model of secondary channel, establish respectively main channel and
The transaudient characterisitic family that secondary channel changes with grip force value；
S50：Based on transaudient characterisitic family, the earphone clip force value to be measured is determined using transaudient characteristic analysis method.
The earphone grip force scaling method is main logical by quantifying by the measurement and analysis of the transaudient performance data to earphone
The transaudient property difference in road and secondary channel obtains the optimal grip force value of earphone, and under the grip force value, earphone can be realized well
Passive noise reduction, and lay a good foundation for the design of active noise reduction.
In the present embodiment, the measurement data of the main channel in step S10 and secondary channel is respectively：Main channel input,
Output time-domain data X1, Y1；Secondary channel input, output time-domain data X2, Y2.
In the present embodiment, the transaudient characteristic of main channel and secondary channel is established using least square class parameter identification method
Model.I.e. based on data X1, Y1, X2, Y2 obtain the biography of main channel and secondary channel using least square class parameter identification method
The transmission function expression formula of sound characteristics, is denoted as PA (s), SPK (s) respectively, and wherein s represents differential operator.
In the present embodiment, in step S30, the transaudient characteristic transmission function expression in main channel under multiple grip force values is obtained
Formula is denoted as PA1 (s), PA2 (s) ..., PAn (s), numbers of the wherein n for grip force value, the transaudient characteristic of secondary channel, difference respectively
It is denoted as SPK1 (s), SPK2 (s) ..., SPKn (s).
In the present embodiment, in step S40, main channel is divided with secondary channel with the transaudient characterisitic family that grip force value changes
It is not：The transaudient characteristic transmission function expression formula PA1 (s) in main channel under multiple grip force values, PA2 (s) ..., PAn (s) enable s=
The π of jw, w=0~2, wherein, w represents angular frequency, and j represents complex operator.It brings into above-mentioned transmission function PA1 (s), is calculated
The curve that the amplitude of transmission function PA1 (s) changes with w, as a transaudient characteristic curve, can similarly obtain PA2 (s) ..., PAn
(s) curve that amplitude changes with w, and then obtain the transaudient characterisitic family in main channel.Secondary channel under multiple grip force values is transaudient
Characteristic transmission function SPK1 (s), SPK2 (s) ..., SPKn (s) enable s=jw, and the π of w=0~2 brings above-mentioned transmission function SPK1 into
(s) in, the curve that the amplitude of transmission function SPK1 (s) changes with w, as a transaudient characteristic curve is calculated, similarly may be used
SPK2 (s) ..., the curve that SPKn (s) amplitudes change with w are obtained, and then obtains the transaudient characterisitic family of secondary channel.
In the present embodiment, the earphone clip force value to be measured is determined using transaudient characteristic analysis method, have in step 50
Body includes the following steps：
S501：Corresponding grip force value set A is determined using main channel characteristic screening method；
S502：For grip force value set A, optimal grip force value is determined using secondary channel screening method.
In the present embodiment, step S501 determines that corresponding grip force value set A is included such as using main channel characteristic screening method
Lower step (1)-(3)：
Step (1)：Each grip force is worth corresponding main channel acoustic characteristic curve and main channel acoustic characteristic upper limit curve
It is compared；
Step (2)：No more than the as qualified curve of the acoustic characteristic curve of the upper limit curve on any frequency point, and
Remember that its corresponding grip force value is A1；
Step (3)：It repeats the above process, obtains qualified grip force value set A={ A1, A2 ... An }；Wherein n represents to meet
The grip force value number of condition.
Main channel acoustic characteristic upper limit curve in above-mentioned steps (1), which is that one of the passive oise insulation factor to earphone is minimum, to be wanted
It asks.
By the transaudient characteristic screening method in above-mentioned main channel, it can filter out and meet the corresponding folder of preset passive noise reduction requirement
Force value.
In the present embodiment, step S502 determines optimal grip force value with secondary channel screening method, specifically comprises the following steps
M-N：
Step M：By the transaudient characteristic curve of secondary channel and secondary channel, nominally transaudient characteristic curve carries out similarity analysis；
Step N：The corresponding grip force value of the transaudient characteristic curve of secondary channel for determining similarity maximum is optimal grip force value.
By the transaudient characteristic curve screening method of above-mentioned secondary channel, can pass through on the basis of the screening technique of main channel
With the similarity calculation of nominal sound secondary channel acoustic characteristic curve, optimal grip force value is determined.Under the grip force value, Neng Goubao
Demonstrate,prove the superperformance that follow-up active noise reduction techniques are implemented.
In the present embodiment, the similarity analysis in above-mentioned steps M includes the following steps a and step b：
Step a：Using alignment algorithm by the secondary channel acoustic characteristic curve spk and spk0 pairs of the nominal curve
Together, the curve spk ' after being aligned；
Step b：According to the curve skp ' after the alignment, similarity Sn is calculated.
In the present embodiment, the alignment algorithm in above-mentioned steps a is：Determine real number k so that | | spk0-k × spk | |2's
Value is minimum, curve skp ＇=k × spk after the alignment.
In the present embodiment, the similarity S in above-mentioned steps bn=| | skp0-skp ＇ | |2。
By above-mentioned similarity analysis, the similarity with current acoustic characteristic curve and nominal curve can be obtained, it is above-mentioned
The calculation formula of similarity shows that the numerical value of Sn is smaller, illustrates that current acoustic characteristic curve and nominal curve similarity are higher, Sn
Numerical value it is bigger, current acoustic characteristic curve is lower with nominal curve similarity.
Above-mentioned grip force determines method by quantifying influence of the grip force to passive noise reduction and active noise reduction so that active noise reduction ear
Machine designer can obtain the corresponding grip force value of optimal acoustic characteristic, and the design for active noise reduction system lays the foundation, and the party
It is forensic science, easy to implement.
Embodiment 3
Based on the earphone grip force scaling method that embodiment 2 proposes, the present embodiment provides specific calculating process and result.
In the present embodiment, three grip force values F1, F2 and F3 are determined respectively.
Under grip force value F1, the main channel measurement data x1 of earphone to be measured, the measurement of y1 and secondary channel are acquired respectively
Data x2, y2；Based on measurement data x1, y1 and x2, y2；Multiply parameter identification method using two classes of minimum and establish the transaudient spy in main channel
Property model PA1 (s) and the transaudient characteristic model SPK1 (s) of secondary channel；
Similarly, under grip force value F2, the main channel measurement data x3 of earphone to be measured is acquired respectively, y3 and secondary channel
Measurement data x4, y4；Based on measurement data x3, y3 and x4, y4；Multiply parameter identification method using two classes of minimum and establish main channel biography
Sound characteristics model PA2 (s) and the transaudient characteristic model SPK2 (s) of secondary channel；
Similarly, under grip force value F3, the main channel measurement data x5 of earphone to be measured is acquired respectively, y5 and secondary channel
Measurement data x6, y6；Based on measurement data x5, y5 and x6, y6；Multiply parameter identification method using two classes of minimum and establish main channel biography
Sound characteristics model PA3 (s) and the transaudient characteristic model SPK3 (s) of secondary channel；
Enable s=jw, the π of w=0~2, wherein, w is angular frequency, and j is complex operator, is brought into above-mentioned transmission function PA1 (s),
The curve that the amplitude of transmission function PA1 (s) changes with w is calculated, the transaudient characteristic curve pa1 in an as main channel enables s=
The π of jw, w=0~2, brings into above-mentioned transmission function SPK1 (s), is calculated what the amplitude of transmission function SPK1 (s) changed with w
The transaudient characterisitic family spk1 of curve, as secondary channel.
Enable s=jw, the π of w=0~2 brings into above-mentioned transmission function PA2 (s), the width of transmission function PA2 (s) is calculated
It is worth the curve that changes with w, the as transaudient characteristic curve pa2 in main channel enables s=jw, and the π of w=0~2 brings above-mentioned transmission function into
In SPK2 (s), the curve that the amplitude of transmission function SPK2 (s) changes with w, the as transaudient characteristic of secondary upmixed audio channel is calculated
Curve spk2.
Enable s=jw, the π of w=0~2 brings into above-mentioned transmission function PA3 (s), the width of transmission function PA3 (s) is calculated
It is worth the curve that changes with w, the as transaudient characteristic curve pa3 in main channel enables s=jw, and the π of w=0~2 brings above-mentioned transmission function into
In SPK3 (s), the curve that the amplitude of transmission function SPK3 (s) changes with w, the as transaudient characteristic curve of secondary channel is calculated
spk3。
Pa1, pa2 and pa3 and the transaudient characteristic upper limit curve pa0 in main channel are compared respectively, on any frequency point
It is qualified curve, and remember that its corresponding grip force value is A1 no more than the acoustic characteristic curve of the upper limit curve, it is assumed that
A1=[F1, F3].
It is worth the corresponding transaudient characteristic curve spk1 and spk3 of secondary channel for F1, F3 grip force, distinguishes itself and secondary nominal time
Grade channel plot spk0 carries out similarity calculation.Determine real number k1 so that | | spk0-k1 × spk1 | |2Value it is minimum, after alignment
Curve skp1 ＇=k1 × spk1, similarity S1n=| | skp1-skp1 ＇ | |2.Determine real number k3 so that | | spk0-k3 ×
spk3||2Value it is minimum, curve skp3 '=k3 × skp3 after alignment, similarity S3n=| | skp3-skp3 ' | |2.If S1n＞
S3n, then illustrate that the similarity of spk3 and spk0 is high, it is determined that grip force value is F3；If S1n＜ S3n, then illustrate spk1's and spk0
Similarity is high, it is determined that grip force value is F1.
Obviously, it is apparent to those skilled in the art that, each step of above-mentioned design method, which can be used, leads to
Computing device realizes that they can concentrate on single computing device or be distributed in multiple computing device institutes group
Into network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are deposited
Storage in the storage device by computing device come perform either they are fabricated to respectively each integrated circuit modules or by it
In multiple modules or step be fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific
Hardware and software combine.
Unless specifically stated otherwise, component and the opposite step of step, the digital table otherwise illustrated in these embodiments
It is not limit the scope of the invention up to formula and numerical value.
The technique effect of the device that the embodiment of the present invention is provided, realization principle and generation and preceding method embodiment phase
Together, to briefly describe, device embodiment part does not refer to part, can refer to corresponding contents in preceding method embodiment.
In all examples being illustrated and described herein, any occurrence should be construed as merely illustrative, without
It is as limitation, therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need to that it is further defined and explained in subsequent attached drawing.
Flow chart and block diagram in attached drawing show the system, method and computer journey of multiple embodiments according to the present invention
Architectural framework in the cards, function and the operation of sequence product.In this regard, each box in flow chart or block diagram can generation
The part of one module of table, program segment or code, a part for the module, program segment or code include one or more use
In the executable instruction of logic function as defined in realization.It should also be noted that it in some implementations as replacements, is marked in box
The function of note can also be occurred with being different from the sequence marked in attached drawing.For example, two continuous boxes can essentially base
Originally it is performed in parallel, they can also be performed in the opposite order sometimes, this is depended on the functions involved.It is also noted that
It is the combination of each box in block diagram and/or flow chart and the box in block diagram and/or flow chart, can uses and perform rule
The group of specialized hardware and computer instruction is realized or can be used to fixed function or the dedicated hardware based system of action
It closes to realize.
Claims (14)
1. a kind of earphone grip force calibration system, which is characterized in that including grip force measuring system, acoustic characteristic measuring system, data
Processing system and earphone to be measured；
The earphone to be measured is connect respectively with the grip force measuring system and the acoustic characteristic measuring system, and the acoustics is special
Property measuring system is also connect with the data processing system.
2. earphone grip force calibration system according to claim 1, which is characterized in that the grip force measuring system includes connection
Grip force measuring device and display device；
Distance realizes the variation of grip force between two head-shields of the grip force measuring device by changing the earphone to be measured；
The display device shows the current grip force value of the earphone to be measured.
3. earphone grip force calibration system according to claim 2, which is characterized in that the grip force measuring device can be not
The earphone to be measured is fixed under same grip force.
4. earphone grip force calibration system according to claim 1, which is characterized in that the acoustic measurement system includes sound
Detection device, sound-producing device and data acquisition device；
The sound detection device, sound-producing device are both placed in any earmuff of the earphone to be measured；
The sound detection device is individually connect with the data acquisition device；Or, the sound detection device, the sounding dress
It puts and equal is connect with the data acquisition device.
5. earphone grip force calibration system according to claim 4, which is characterized in that the sound detection device is no less than 1
It is a.
6. earphone grip force calibration system according to claim 1, which is characterized in that the data processing system is included successively
Storage unit, computing unit and the output unit of connection；
The computing unit includes data prediction, modeling, analytic function.
7. a kind of earphone grip force scaling method, which is characterized in that including：
Under a certain grip force value, the main channel of earphone to be measured and the measurement data of secondary channel are acquired respectively；
Based on measurement data, the transaudient characteristic model of main channel and secondary channel is established respectively；
Above-mentioned two step is repeated, respectively obtains the main channel under multiple grip force values and the transaudient characteristic model of secondary channel；
Based on the main channel under multiple grip force values and the transaudient characteristic model of secondary channel, establish respectively main channel and secondary channel with
The transaudient characterisitic family of grip force value variation；
Based on transaudient characterisitic family, the earphone clip force value to be measured is determined using transaudient characteristic analysis method.
8. earphone grip force scaling method according to claim 7, which is characterized in that described to establish the main channel and secondary
The transaudient characteristic model of channel, specifically includes：
The transaudient characteristic model of main channel and secondary channel is established using least square class parameter identification method.
9. earphone grip force scaling method according to claim 7, which is characterized in that described to utilize transaudient characteristic analysis method
It determines the earphone clip force value to be measured, specifically includes：
Corresponding grip force value set A is determined using main channel characteristic screening method；
For grip force value set A, optimal grip force value is determined using secondary channel screening method.
10. earphone grip force scaling method according to claim 9, which is characterized in that described to be screened using main channel characteristic
Method determines corresponding grip force value set A, specifically includes：
The corresponding transaudient characteristic curve in main channel of each grip force value and the transaudient characteristic upper limit curve in scheduled main channel are carried out pair
Than；
No more than the as qualified curve of the transaudient characteristic curve of the upper limit curve on any frequency point, and remember its corresponding folder
Force value is A1；
Above-mentioned two step is repeated, obtains qualified grip force value set A={ A1, A2 ... An }；Wherein n represents the folder for meeting condition
Force value number.
11. earphone grip force scaling method according to claim 9, which is characterized in that described to utilize secondary channel screening method
It determines optimal grip force value, specifically includes：
By the transaudient characteristic curve of secondary channel and secondary channel, nominally transaudient characteristic curve carries out similarity analysis；
The corresponding grip force value of the transaudient characteristic curve of secondary channel for determining similarity maximum is optimal grip force value.
12. earphone grip force scaling method according to claim 11, which is characterized in that described by the transaudient characteristic of secondary channel
Nominally transaudient characteristic curve carries out similarity analysis to curve with secondary channel, specifically includes：
The transaudient characteristic curve spk of secondary channel with nominal transaudient characteristic curve spk0 is aligned using alignment algorithm, is aligned
Curve spk ' afterwards；
According to the curve spk ' after the alignment, similarity Sn is calculated.
13. earphone grip force scaling method according to claim 12, which is characterized in that the alignment algorithm is：It determines real
Number k so that | | spk0-k × spk | |2Value it is minimum, curve skp '=k × spk after the alignment.
14. earphone grip force scaling method according to claim 12, which is characterized in that the similarity Sn=| | skp0-
skp′||2。
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| CN201810304346.9A CN108200508A (en) | 2018-04-04 | 2018-04-04 | Earphone grip force calibration system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108847250A (en) * | 2018-07-11 | 2018-11-20 | 会听声学科技（北京）有限公司 | A kind of orientation noise-reduction method, system and earphone |
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