CN106921928A - Measurement, calibration method and device to microphone - Google Patents
Measurement, calibration method and device to microphone Download PDFInfo
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- CN106921928A CN106921928A CN201710219457.5A CN201710219457A CN106921928A CN 106921928 A CN106921928 A CN 106921928A CN 201710219457 A CN201710219457 A CN 201710219457A CN 106921928 A CN106921928 A CN 106921928A
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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
- H04R29/004—Monitoring arrangements; Testing arrangements for microphones
Abstract
The invention discloses the device of measurement microphone characteristics, including：Signal generator module, the electric signal according to CF produces corresponding voice signal；Voice signal is propagated to voice tube the other end of voice tube in the form of the plane wave of the CF from end where source；Standard microphone and microphone to be measured are inserted on the tube wall of voice tube respectively, the voice signal in collection voice tube, voice signal is converted into electric signal and is sent；Digital sampling and processing, the phase and microphone to be measured measured according to standard microphone survey phase, try to achieve the phase difference of microphone to be measured and standard microphone, the electric signal sent based on standard microphone obtains the amplitude of standard microphone, and the electric signal measured based on the amplitude and microphone to be measured obtains the sensitivity of microphone to be measured.The present invention realizes and branched microphone measured simultaneously and calibrates and the phase and sensitivity of microphone measured and calibrated simultaneously, cost-effective, improves the efficiency of measurement and calibration.
Description
Technical field
The present invention relates to sonicated field, measurement, calibration method and device more particularly to microphone.
Background technology
When microphone is applied in the field such as identification of sound source and positioning, Noise measarement simultaneously, it may be desirable to which branched microphone is carried out
The collection of sound, to ensure the accuracy of the data source of collection, it is thus necessary to determine that every characteristic of microphone.Due to the spy of microphone
Property can over time, the environment such as temperature, humidity change, therefore, needed to enter microphone characteristics before microphone use
Row calibration, the data error that reduction is caused due to the change of microphone characteristics.
It is existing calibration is carried out to microphone characteristics to include：Sensitivity calibration and phase alignment.Wherein, sensitivity calibration side
Method is：One sound source of constant sound-pressure is produced on one or several Frequency points using pistonphone, by Mike to be calibrated
Wind is attached thereto, and measures the output signal of microphone, now the sound pressure level of known sound source, therefore can be calculated microphone
Sensitivity.Phase alignment is：Using measured under the conditions of free found field microphone to be calibrated and standard microphone when
Between differ from and determine the phase of microphone.
Realize it is of the invention during, inventor has found the calibration of existing microphone, and at least there are the following problems：
1st, the method for sensitivity calibration can only be calibrated to single branch microphone, it is impossible to while carrying out school to branched microphone
Standard, also have in addition calibration Frequency point is few, calibration point frequency can not unrestricted choice, calibration efficiency is low and calibration frequency is special
The problems such as levying not comprehensive；
2nd, sensitivity calibration or phase alignment can only be individually carried out, and cannot the two characteristics be carried out with school simultaneously
Standard, causes calibration efficiency low, when number of microphone to be measured is more, can take considerable time；
3rd, because sensitivity calibration and phase alignment use two kinds of different methods, it is therefore desirable to buy two sets of calibrations
Equipment, causes to calibrate high cost；
4th, the method for phase alignment is in order to exclude the influence of ambient noise and sound reflecting, it is necessary to carry out in free found field.
Need to build special anechoic room in actual applications to simulate free found field, anechoic room construction cost is sufficiently expensive, phase school
Locating tab assembly method is complicated.Meanwhile, anechoic room can not be moved arbitrarily, when needing to carry out outer field measurement, it is impossible to meet field calibration
Requirement, it is impossible to carry out microphone phase alignment in time.
The content of the invention
The present invention provides a kind of Microphone calibration method and apparatus, for carrying out the school of sensitivity of microphone and phase simultaneously
Standard, improves the precision for using microphone test measurement.In the present invention, using the characteristic of pipeline plane wave, school simultaneously is realized
The function of quasi- sensitivity of microphone and phase.
One side according to embodiments of the present invention, there is provided a kind of device of measurement microphone characteristics, for measuring wheat
The phase of gram wind and/or sensitivity, including：Signal generator module, for producing corresponding sound according to the electric signal of CF
Message number；Voice tube, its one end is arranged at the source for producing the voice signal, for by the voice signal with the specific frequency
The form of the plane wave of rate propagates to the other end of voice tube from end where the source；Standard microphone and microphone to be measured,
It is inserted in respectively on the tube wall of the voice tube, the voice signal for that will collect is converted to electric signal, and by the telecommunications
Number send to digital sampling and processing；Digital sampling and processing, for the electric signal sent according to the standard microphone
Obtain standard microphone surveys phase P, and the electric signal Ui that sends of microphone to be measured obtains microphone to be measured and surveys phase Pi,
The phase difference P=P-Pi of microphone to be measured and standard microphone is tried to achieve according to the phase P and phase Pi, and/or based on institute
The electric signal for stating standard microphone transmission obtains the amplitude A of standard microphone, according to the telecommunications that amplitude A and microphone to be measured are measured
Number be Ui, obtain the sensitivity S i=A/Ui of microphone to be measured；Wherein, i is microphone to be measured numbering.
Further, the device of described measurement microphone characteristics, the signal generator module includes：Signal generator, uses
In the electric signal for producing CF；Sound source, its one end for being arranged on the voice tube, for receiving the CF
Electric signal when, produce corresponding voice signal.
Further, the device of described measurement microphone characteristics, the diameter and length of the voice tube (2) determine to be measured
The frequency bandwidth and number of microphone (4).
Further, the device of described measurement microphone characteristics, also including sound-absorbing parts, using sound-absorbing material, the suction
Part part is arranged at relative with sound source one end in the voice tube.
Further, the device of described measurement microphone characteristics, also including display module, for showing the data acquisition
The microphone to be measured that processing module is exported surveys phase Pi and/or sensitivity S i.
Another aspect according to embodiments of the present invention, there is provided a kind of method of measurement microphone characteristics, for measuring
The phase of microphone and/or sensitivity, including：In one end of voice tube, the electric signal according to CF produces corresponding sound
Message number；The voice signal is propagated in the form of the plane wave of the CF from the source of the voice signal transaudient
The other end of pipe；The telecommunications that the standard microphone and microphone to be measured that acquisition is inserted on the tube wall of the voice tube are exported
Number；What the electric signal sent according to the standard microphone obtained standard microphone surveys phase P, and microphone to be measured transmission
Electric signal Ui obtains microphone to be measured and surveys phase Pi, and microphone to be measured and standard wheat are tried to achieve according to the phase P and phase Pi
The phase difference P=P-Pi of gram wind, and/or the amplitude of standard microphone is obtained based on the electric signal that the standard microphone sends
A, is Ui according to the electric signal that amplitude A microphones to be measured are measured, and obtains the sensitivity S i=A/Ui of microphone to be measured；Wherein, i is
Microphone numbering to be measured.
Further, the method for described a kind of measurement microphone characteristics, wherein, it is described " in one end of voice tube, according to spy
The electric signal for determining frequency produces corresponding voice signal " include：Produce the electric signal of CF；The one of the voice tube
End, the electric signal according to the CF produces corresponding voice signal.
Further, the method for described a kind of measurement microphone characteristics, wherein, by the diameter and length that control voice tube
Control the frequency bandwidth of microphone to be measured and the number of microphone to be measured 4.
Further, the method for described a kind of measurement microphone characteristics, wherein, also include：Sound-absorbing parts, using sound absorption material
Material, the sound-absorbing parts are arranged at relative with sound source one end in the voice tube.
Further, the method for described a kind of measurement microphone characteristics, wherein, also include：Obtaining microphone institute to be measured
Survey after phase Pi, show that the microphone to be measured surveys phase Pi；And/or obtaining the sensitivity S i of the microphone to be measured
Afterwards, the sensitivity S i of the microphone to be measured is shown.
The beneficial effect of the embodiment of the present invention：
First, present invention employs voice tube so that given voice signal is propagated in the form of plane wave in pipe, by
In plane wave be a series of ripple of planes being parallel to each other.Remotely, a local model is taken along the direction of propagation of ripple from a wave source
From the point of view of enclosing, the corrugated in the range of this is all parallel characteristic, and each microphone therefore in voice tube diverse location is adopted
The voice signal difference very little for collecting, so as to realize calibrating multiple microphones simultaneously.
Second, present invention employs new calibrating principle and calibration algorithm, a set of equipment is capable of achieving simultaneously to microphone spirit
The measurement and calibration of sensitivity and phase, it is not necessary to buy two complete equipments and build free found field, save calibration and measurement cost.
3rd, the diameter and length by changing voice tube of the invention is realized to microphone in relatively wide frequency range
Inside calibrated, improved the precision for using microphone test measurement.
4th, the present invention realizes portability, simple to operate, can not be disturbed by environment, and realization scene carries out wheat
The function of gram wind calibration.
5th, the present invention has versatility, and various sizes of microphone can be calibrated.
Brief description of the drawings
Fig. 1 is the module relationship schematic diagram of the device that first embodiment of the invention provides measurement microphone characteristics.
Fig. 2 is the module relationship schematic diagram of the device that second embodiment of the invention provides measurement microphone characteristics.
Specific embodiment
To make the object, technical solutions and advantages of the present invention of greater clarity, with reference to specific embodiment and join
According to accompanying drawing, the present invention is described in more detail.It should be understood that these descriptions are merely illustrative, and it is not intended to limit this hair
Bright scope.Additionally, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring this
The concept of invention.
Fig. 1 is referred to, Fig. 1 is that the module relationship of the device that first embodiment of the invention provides measurement microphone characteristics is illustrated
Figure.
As shown in figure 1, in embodiments of the present invention, the device for measuring microphone characteristics includes：Signal generator module 1, biography
Sound pipe 2, standard microphone 3, microphone to be measured 4 and digital sampling and processing 5.It should be noted that the embodiment of the present invention can
With the phase of independent measurement microphone, it is also possible to the sensitivity of independent measurement microphone, the phase of microphone can also be simultaneously measured
Position and sensitivity.
Specifically, signal generator module 1 is used to produce corresponding voice signal according to the electric signal of CF.Carry out wheat
The measurement of gram wind characteristic needs the acoustic signals of a given frequency and power, is measured by the known features signal,
Obtain the characteristic of microphone to be calibrated.Signal generator module 1 can include that the input communicated to connect with the signal generator module 1 sets
Standby, such as equipment such as keyboard, button, touch-screen can also be the mobile terminal devices such as mobile phone, panel computer.When start measurement
When, survey crew is input into predefined parameter by input equipment to signal generator module 1 so that signal generator module 1 produces specific
The electric signal of frequency, and the electric signal of the CF is converted into the voice signal of corresponding frequencies.In one of the invention tool
In body implementation method, signal generator module 1 can include：Signal generator 12 and sound source 11.Wherein, signal generator 12, use
In the electric signal for producing CF.It should be noted that the selection of frequency is related to the caliber of the voice tube 2 for being used.Example
Such as, when the caliber of voice tube 2 is 100mm, now the electric signal of CF is frequency in the range of 340Hz~1700Hz is arrived
Sine wave.Sound source 11 is used to, when the electric signal of CF is received, produce corresponding voice signal.Sound source 11 can be adopted
It is loudspeaker with loudspeaker, specifically, electromagnetic type inductor loudspeaker, excited field loudspeaker, electrostatic loudspeaker, pressure can be used
The loudspeaker of the types such as electroceramics formula loudspeaker, electrodynamic type coil-moving speaker.The species of loudspeaker is not limited to this hair
Bright protection domain.
One end of voice tube 2 is arranged at the source for producing voice signal.Voice tube 2 is used for voice signal with the specific frequency
The form of the plane wave 100 of rate propagates to the other end of voice tube 2 from end where source.Plane wave 100 is produced in voice tube 2
Principle is:When the frequency of the signal of sound source 11 is less than the cut-off frequency of the voice tube 2, sound wave is in voice tube 2 with plane wave 100
Form exist.Specifically, the set location of voice tube 2 is：One end of voice tube 2 is against the loudspeaker of sound source 11, and voice tube 2
Pipe shaft parallel to sound the direction of propagation.Voice tube 2 is to extend to the identical pipe in other end cross section from one end.It is transaudient
The shape of the cross section of pipe 2 can be various shapes, such as circle, ellipse, square, rectangle, round rectangle etc..Voice tube 2
The shape of cross section be not used in and limit the scope of the invention.
Standard microphone 3 and microphone to be measured 4 are inserted on the tube wall of voice tube 2 respectively.When generation plane in voice tube 2
During the voice signal of the form of ripple 100, standard microphone 3 and microphone to be measured 4 gather the voice signal in voice tube 2 respectively, and
The voice signal that will be collected is converted to electric signal, and electric signal is sent to digital sampling and processing.Of the invention one
In individual specific embodiment, when setting standard microphone 3 and microphone 4 to be measured, by standard microphone 3 and 4 one-tenth of microphone to be measured
To it is vertical be correspondingly arranged, i.e., a standard microphone 3 is often set on the tube wall of voice tube 2, just with the standard microphone 3
One microphone to be measured 4 is set on same upright position.
Digital sampling and processing 5, the electric signal for being sent according to microphone to be measured 4 obtains microphone to be measured 4 and is surveyed
Phase Pi, and/or the amplitude A of standard microphone 3 is obtained based on the electric signal that standard microphone 3 sends, treated based on amplitude A
Survey the sensitivity S i of microphone 4.
In another embodiment of the present invention, on the basis of previous embodiment, in the device of measurement microphone characteristics,
The frequency bandwidth and/or while the microphone that can be calibrated of microphone 4 to be measured are controlled by controlling the diameter and length of voice tube 2
Number.In embodiments of the present invention, the highest frequency of the measurement of voice tube 2 is：F=1.57*c/ (2*pi*r), wherein：C is sound
Speed；R is the radius of voice tube 2 or side long.I.e. room temperature when, velocity of sound c=340m/s, when selection voice tube 2 is round tube, radius is
During 0.05m, then highest can measured frequency be 1700Hz.Microphone is evenly arranged on the section of voice tube 2, and interval angles are recommended as 40
Degree be not limited to 40 degree, the diameter according to the diameter of voice tube 2 and microphone and constrain, it is ensured that not mutual trust interfere.In order to reduce difference
The interference of microphone on section, it is ensured that the 1 times diameter of the distance not less than voice tube 2 in difference measurement section.Based on engineer applied
Consideration, the length of total voice tube 2 should be less than 100 times of the diameter of voice tube 2.
Fig. 2 is referred to, Fig. 2 is that the module relationship of the device that second embodiment of the invention provides measurement microphone characteristics is illustrated
Figure.
As shown in Fig. 2 in embodiments of the present invention, the device for measuring microphone characteristics also includes sound-absorbing parts 6.The sound absorption
Part 6 uses sound-absorbing material.Sound-absorbing parts 6 are arranged in voice tube 2, and sound-absorbing parts 6 are arranged on relative with sound source 11
End.The geomery of sound-absorbing parts 6 is to match with the geomery of voice tube 2, with enable sound-absorbing parts 6 fill in it is transaudient
During pipe 2, can around be close to the inner tubal wall of voice tube 2.Specifically, the geomery of the cross section of sound-absorbing parts 6 with it is transaudient
The geomery of the cross section of pipe 2 matches.
As shown in Fig. 2 in embodiments of the present invention, the device for measuring microphone characteristics also includes display module 7, shows mould
Block 7 surveys phase Pi and/or sensitivity S i for the microphone to be measured 4 that display data acquisition processing module is exported.
The device of present invention calibration microphone, also includes：Phase alignment module and/or sensitivity calibration module.
Phase alignment module, what the electric signal sent according to the standard microphone 3 obtained standard microphone 3 surveys phase
P；The electric signal Ui sent according to microphone to be measured 4 obtains microphone to be measured 4 and surveys phase Pi；Asked according to phase P and phase Pi
Obtain the phase difference P=P-Pi of microphone to be measured and standard microphone.Used when other measurement tests are used for microphone to be measured
The phase difference for measuring to microphone to be measured for being modified.
Sensitivity calibration module, the electric signal sent based on standard microphone 3 obtains the amplitude A of standard microphone 3, according to
The electric signal Ui that amplitude A and microphone to be measured 4 are measured, obtains the sensitivity S i=A/Ui of microphone to be measured 4；Wherein, i is to be measured
Microphone is numbered.It should be noted that because the signal in voice tube 2 is plane wave, therefore in the voice tube 2, each survey
The amplitude all same of microphone to be measured 4 and standard microphone 3 on amount section.
Present invention also offers a kind of method for measuring microphone characteristics, for measuring the phase of microphone and/or sensitive
Degree, inventive embodiments can be with the phase of independent measurement microphone, it is also possible to the sensitivity of independent measurement microphone, can also be simultaneously
Measure phase and the sensitivity of microphone.
Specifically, when the phase of independent measurement microphone, S1, S2, S3, S4 are comprised the following steps, when independent measurement wheat
During the sensitivity of gram wind, S1, S2, S3, S5 are comprised the following steps, while when measuring phase and the sensitivity of microphone, including with
Lower step S1, S2, S3, S4, S5.
Step S1, in one end of voice tube 2, the electric signal according to CF produces corresponding voice signal.
Carrying out the measurement of microphone characteristics needs the acoustic signals of a given frequency and power, by the known features
Signal is measured, and obtains the characteristic of microphone to be calibrated.Signal generator module 1 can include logical with the signal generator module 1
Believe the input equipment of connection, such as equipment such as keyboard, button, touch-screen can also set for mobile terminals such as mobile phone, panel computers
It is standby.When measurement is started, survey crew is input into predefined parameter by input equipment to signal generator module 1 so that signal is produced
Module 1 produces the electric signal of CF, and the electric signal of the CF is converted into the voice signal of corresponding frequencies.At this
In one specific embodiment of invention, signal generator module 1 can include：Signal generator 12 and sound source 11.Wherein, signal
Generator 12, the electric signal for producing CF.It should be noted that the selection of frequency and the voice tube 2 for being used
Caliber is related.For example, when voice tube 2 caliber be 100mm when, now the electric signal of CF be frequency 340Hz~
1700Hz arrive in the range of sine wave.Sound source 11 is used to, when the electric signal of CF is received, produce corresponding sound letter
Number.Sound source 11 can be loudspeaker using loudspeaker, specifically, can using electromagnetic type inductor loudspeaker, excited field loudspeaker,
The loudspeaker of the types such as electrostatic loudspeaker, piezoelectric ceramic loudspeaker, electrodynamic type coil-moving speaker.The species of loudspeaker is simultaneously
It is not used in and limits the scope of the invention.
Step S2, voice signal is propagated in the form of the plane wave 100 of the CF from the source of voice signal
The other end of voice tube 2.
The principle of plane wave 100 is produced in voice tube 2 is:When the cut-off of the frequency less than the voice tube 2 of the signal of sound source 11
During frequency, sound wave exists in voice tube 2 in the form of plane wave 100.Specifically, the set location of voice tube 2 is：Voice tube
2 one end against the loudspeaker of sound source 11, and voice tube 2 pipe shaft parallel to sound the direction of propagation.Voice tube 2 is to prolong from one end
Extend the identical pipe in other end cross section.The shape of the cross section of voice tube 2 can be various shapes, such as round, oval,
Square, rectangle, round rectangle etc..The shape of the cross section of voice tube 2 is not used in and limits the scope of the invention.
Step S3, the electricity that the standard microphone 3 and microphone to be measured 4 that acquisition is inserted on the tube wall of voice tube 2 are exported
Signal.
Standard microphone 3 and microphone to be measured 4 are inserted on the tube wall of voice tube 2 respectively.When generation plane in voice tube 2
During the voice signal of the form of ripple 100, standard microphone 3 and microphone to be measured 4 gather the voice signal in voice tube 2 respectively, and
The voice signal that will be collected is converted to electric signal, and electric signal is sent to digital sampling and processing.Of the invention one
In individual specific embodiment, when setting standard microphone 3 and microphone 4 to be measured, by standard microphone 3 and 4 one-tenth of microphone to be measured
To it is vertical be correspondingly arranged, i.e., a standard microphone 3 is often set on the tube wall of voice tube 2, just with the standard microphone 3
One microphone to be measured 4 is set on same upright position.
Step S4, what the electric signal sent according to standard microphone 3 obtained standard microphone (3) surveys phase P, according to treating
The electric signal Ui that survey microphone 4 sends obtains microphone to be measured 4 and surveys phase Pi, and wheat to be measured is tried to achieve according to phase P and phase Pi
The phase difference P=P-Pi of gram wind and standard microphone.
When other measurement tests are used for microphone to be measured with the phase difference for measuring for being carried out to microphone to be measured
Amendment.
In another embodiment of the present invention, on the basis of previous embodiment, the diameter and length of voice tube 2 are determined
The frequency bandwidth and number of microphone to be measured 4, therefore, by controlling the diameter and length of voice tube 2, wheat to be measured can be controlled
The frequency bandwidth and the number of microphone to be measured 4 of gram wind 4.In embodiments of the present invention, the highest frequency of the measurement of voice tube 2 is：f
=1.57*c/ (2*pi*r), wherein：C is the velocity of sound；R is the radius of voice tube 2 or side long.I.e. room temperature when, velocity of sound c=340m/s, when
Selection voice tube 2 be round tube, radius be 0.05m when, then highest can measured frequency be 1700Hz.Microphone is in the section of voice tube 2
On be evenly arranged, interval angles are recommended as 40 degree and are not limited to 40 degree, the diameter according to the diameter of voice tube 2 and microphone and constrain,
Ensure not mutual trust interference.In order to reduce the interference of microphone on different cross section, it is ensured that the distance in difference measurement section is not less than biography
1 times of diameter of sound pipe 2.Consideration based on engineer applied, the length of total voice tube 2 should be less than 100 times of the diameter of voice tube 2.
Step S5, the electric signal sent based on standard microphone 3 obtains the amplitude A of standard microphone 3, according to amplitude A and
The electric signal that microphone to be measured 4 is measured obtains the sensitivity S i=A/Ui of microphone to be measured 4 for Ui；Wherein, i is microphone to be measured
Numbering, i=1,2,3,4....
It should be noted that because the signal in voice tube 2 is plane wave, therefore in the voice tube 2, each measurement cuts
The amplitude all same of microphone to be measured 4 and standard microphone 3 on face.
In another embodiment of the present invention, on the basis of previous embodiment, also include：Obtaining microphone to be measured
4 survey after phase Pi, show that microphone 4 to be measured surveys phase Pi；And/or obtain microphone to be measured 4 sensitivity S i it
Afterwards, the sensitivity S i of microphone 4 to be measured is shown.
One of ordinary skill in the art will appreciate that realizing that step can be by journey in the method for above-mentioned calibration microphone
Sequence is completed to instruct related hardware, and program can be stored in a computer read/write memory medium, the program upon execution,
Flow including the following such as embodiment of above-mentioned each method.Wherein, storage medium can be magnetic disc, CD, read-only memory
(Read-OnlyMemory, abbreviation ROM) or random access memory (RandomAccessMemory, abbreviation RAM) etc..
Step in present invention method can according to actual needs carry out order adjustment, merge and delete.This hair
Module in bright embodiment device can according to actual needs be merged, divides and deleted.
It should be appreciated that above-mentioned specific embodiment of the invention is used only for exemplary illustration or explains of the invention
Principle, without being construed as limiting the invention.Therefore, that is done without departing from the spirit and scope of the present invention is any
Modification, equivalent, improvement etc., should be included within the scope of the present invention.Additionally, appended claims purport of the present invention
In the whole changes covered in the equivalents for falling into scope and border or this scope and border and repair
Change example.
Claims (10)
1. it is a kind of measure microphone characteristics device, it is characterised in that phase and/or sensitivity for measuring microphone, bag
Include：
Signal generator module (1), for producing corresponding voice signal according to the electric signal of CF；
Voice tube (2), its one end is arranged at the source for producing the voice signal, for by the voice signal with the specific frequency
The form of the plane wave (100) of rate propagates to the other end of voice tube (2) from the source；
Standard microphone (3) and microphone to be measured (4), are inserted on the tube wall of the voice tube (2), for that will collect respectively
Voice signal be converted to electric signal, and the electric signal is sent to digital sampling and processing (5)；
Digital sampling and processing (5) includes：Phase alignment module and/or sensitivity calibration module；
Wherein, phase alignment module, the electric signal for being sent according to the standard microphone (3) obtains standard microphone (3)
Survey phase P；The electric signal Ui sent according to microphone to be measured (4) obtains microphone to be measured (4) and surveys phase Pi；According to institute
State phase P and phase Pi and calculate phase difference P=P-Pi；
Sensitivity calibration module, the electric signal for being sent based on the standard microphone (3) obtains the width of standard microphone (3)
Value A, according to the electric signal Ui that amplitude A and microphone to be measured (4) are measured, obtains the sensitivity S i=A/Ui of microphone to be measured (4)；
Wherein, i is microphone to be measured numbering.
2. device according to claim 1, wherein, the signal generator module (1) includes：
Signal generator (12), the electric signal for producing CF；
Sound source (11), its one end for being arranged on the voice tube (2), for when the electric signal of the CF is received,
Produce corresponding voice signal.
3. device according to claim 1, wherein,
The diameter and length of the voice tube (2) determine the frequency bandwidth and number of microphone to be measured (4).
4. device according to claim 1, also including sound-absorbing parts (6), using sound-absorbing material, the sound-absorbing parts (6)
It is arranged at relative with the sound source (11) one end in the voice tube (2).
5. device according to claim 1, also including display module (7), for showing the digital sampling and processing
The microphone to be measured (4) for being exported surveys phase Pi and/or sensitivity S i.
6. it is a kind of measure microphone characteristics method, it is characterised in that phase and/or sensitivity for measuring microphone, bag
Include：
In one end of voice tube (2), the electric signal according to CF produces corresponding voice signal；
The voice signal is propagated into biography in the form of the plane wave (100) of the CF from the source of the voice signal
The other end of sound pipe (2)；
The telecommunications that the standard microphone (3) and microphone to be measured (4) that acquisition is inserted on the tube wall of the voice tube (2) are exported
Number Ui；
What the electric signal sent according to the standard microphone (3) obtained standard microphone (3) surveys phase P, according to wheat to be measured
The electric signal Ui that gram wind (4) sends obtains microphone to be measured (4) and surveys phase Pi, tries to achieve and treats according to the phase P and phase Pi
Survey the phase difference P=P-Pi of microphone and standard microphone；And/or
The electric signal sent based on the standard microphone (3) obtains the amplitude A of standard microphone (3), according to amplitude A and to be measured
The electric signal that microphone (4) is measured is Ui, obtains the sensitivity S i=A/Ui of microphone to be measured (4)；
Wherein, i is microphone to be measured numbering.
7. method according to claim 6, wherein, it is described " in one end of voice tube (2), according to the telecommunications of CF
Number produce corresponding voice signal " include：
Produce the electric signal of CF；
In one end of the voice tube (2), the electric signal according to the CF produces corresponding voice signal.
8. method according to claim 6, wherein, also include：
The frequency bandwidth and microphone to be measured (4) of microphone (4) to be measured are controlled by controlling the diameter and length of voice tube (2)
Number.
9. method according to claim 6, wherein, also include：Sound-absorbing parts (6), using sound-absorbing material, the sound absorption portion
Part (6) is arranged at relative with the sound source (11) one end in the voice tube (2).
10. method according to claim 6, wherein, also include：
After obtaining microphone to be measured (4) and surveying phase Pi, show that the microphone (4) to be measured surveys phase Pi；And/or
After the sensitivity S i for obtaining the microphone to be measured (4), the sensitivity S i of the microphone (4) to be measured is shown.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107509154A (en) * | 2017-09-05 | 2017-12-22 | 无锡吉兴汽车声学部件科技有限公司 | A kind of method of testing, test device and the system of the head frequency response of civil miaow |
| CN108260066A (en) * | 2017-12-04 | 2018-07-06 | 中国航空工业集团公司哈尔滨空气动力研究所 | Microphone phased array calibrating installation |
| CN109104685A (en) * | 2018-09-01 | 2018-12-28 | 歌尔股份有限公司 | A kind of microphone temperature characterisitic test system |
| CN109121062A (en) * | 2018-10-17 | 2019-01-01 | 杭州兆华电子有限公司 | A kind of high sound pressure microphone test device |
| CN109951766A (en) * | 2019-03-27 | 2019-06-28 | 苏州科达科技股份有限公司 | Microphone array correction system and method |
| CN110026330A (en) * | 2019-04-25 | 2019-07-19 | 重庆建安仪器有限责任公司 | The method of piston sounding device, probe correcting device and its calibration probe |
| CN110392333A (en) * | 2018-04-20 | 2019-10-29 | 致伸科技股份有限公司 | Microphone detection device |
| CN113079450A (en) * | 2021-04-06 | 2021-07-06 | 北京航空航天大学 | Probe type microphone calibration device and method |
| CN113108896A (en) * | 2021-04-06 | 2021-07-13 | 北京航空航天大学 | Probe type microphone device and measuring method thereof |
| CN113405650A (en) * | 2021-05-29 | 2021-09-17 | 西北工业大学 | Vector sensor correction method based on standing wave tube and sound absorption material |
| CN113709648A (en) * | 2021-08-27 | 2021-11-26 | 重庆紫光华山智安科技有限公司 | Microphone and loudspeaker collaborative testing method, system, medium and electronic terminal |
| CN114449434A (en) * | 2022-04-07 | 2022-05-06 | 荣耀终端有限公司 | Microphone calibration method and electronic equipment |
| CN115103287A (en) * | 2022-06-16 | 2022-09-23 | 北京航空航天大学 | Calibration device and calibration method for probe microphone |
| GB2612445A (en) * | 2021-10-14 | 2023-05-03 | Skyworks Solutions Inc | Electronic acoustic devices, MEMS microphones, and equalization methods |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107509154A (en) * | 2017-09-05 | 2017-12-22 | 无锡吉兴汽车声学部件科技有限公司 | A kind of method of testing, test device and the system of the head frequency response of civil miaow |
| CN108260066A (en) * | 2017-12-04 | 2018-07-06 | 中国航空工业集团公司哈尔滨空气动力研究所 | Microphone phased array calibrating installation |
| CN110392333A (en) * | 2018-04-20 | 2019-10-29 | 致伸科技股份有限公司 | Microphone detection device |
| CN110392333B (en) * | 2018-04-20 | 2021-03-09 | 致伸科技股份有限公司 | Microphone detection device |
| CN109104685A (en) * | 2018-09-01 | 2018-12-28 | 歌尔股份有限公司 | A kind of microphone temperature characterisitic test system |
| CN109104685B (en) * | 2018-09-01 | 2024-01-16 | 潍坊歌尔微电子有限公司 | Microphone temperature characteristic test system |
| CN109121062B (en) * | 2018-10-17 | 2023-01-13 | 杭州兆华电子股份有限公司 | High sound pressure microphone testing arrangement |
| CN109121062A (en) * | 2018-10-17 | 2019-01-01 | 杭州兆华电子有限公司 | A kind of high sound pressure microphone test device |
| CN109951766A (en) * | 2019-03-27 | 2019-06-28 | 苏州科达科技股份有限公司 | Microphone array correction system and method |
| CN110026330A (en) * | 2019-04-25 | 2019-07-19 | 重庆建安仪器有限责任公司 | The method of piston sounding device, probe correcting device and its calibration probe |
| CN110026330B (en) * | 2019-04-25 | 2020-12-11 | 重庆建安仪器有限责任公司 | Piston sounding device, probe calibration device and method for calibrating probe |
| CN113108896A (en) * | 2021-04-06 | 2021-07-13 | 北京航空航天大学 | Probe type microphone device and measuring method thereof |
| CN113108896B (en) * | 2021-04-06 | 2022-05-06 | 北京航空航天大学 | Probe type microphone device and measuring method thereof |
| CN113079450A (en) * | 2021-04-06 | 2021-07-06 | 北京航空航天大学 | Probe type microphone calibration device and method |
| CN113405650A (en) * | 2021-05-29 | 2021-09-17 | 西北工业大学 | Vector sensor correction method based on standing wave tube and sound absorption material |
| CN113709648A (en) * | 2021-08-27 | 2021-11-26 | 重庆紫光华山智安科技有限公司 | Microphone and loudspeaker collaborative testing method, system, medium and electronic terminal |
| GB2612445A (en) * | 2021-10-14 | 2023-05-03 | Skyworks Solutions Inc | Electronic acoustic devices, MEMS microphones, and equalization methods |
| GB2612445B (en) * | 2021-10-14 | 2024-04-24 | Skyworks Solutions Inc | Electronic acoustic devices, MEMS microphones, and equalization methods |
| CN114449434A (en) * | 2022-04-07 | 2022-05-06 | 荣耀终端有限公司 | Microphone calibration method and electronic equipment |
| CN115103287A (en) * | 2022-06-16 | 2022-09-23 | 北京航空航天大学 | Calibration device and calibration method for probe microphone |
| CN115103287B (en) * | 2022-06-16 | 2023-06-20 | 北京航空航天大学 | Calibrating device and calibrating method for probe microphone |
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