CN104954966B - A kind of sensitivity of microphone test fixture and system - Google Patents
A kind of sensitivity of microphone test fixture and system Download PDFInfo
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- CN104954966B CN104954966B CN201510378424.6A CN201510378424A CN104954966B CN 104954966 B CN104954966 B CN 104954966B CN 201510378424 A CN201510378424 A CN 201510378424A CN 104954966 B CN104954966 B CN 104954966B
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- 238000012360 testing method Methods 0.000 title claims abstract description 143
- 230000035945 sensitivity Effects 0.000 title claims abstract description 77
- 239000000523 sample Substances 0.000 claims abstract description 21
- 230000005236 sound signal Effects 0.000 claims description 13
- 241000209140 Triticum Species 0.000 claims description 7
- 235000021307 Triticum Nutrition 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
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- 238000005516 engineering process Methods 0.000 description 4
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- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
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Abstract
The invention discloses a kind of sensitivity of microphone test fixture and systems, the former includes test cabinet, loud speaker and the collection plate with probe, and test cabinet is divided into tone chamber and operating room by supporting clapboard, and loud speaker is mounted in tone chamber；Supporting clapboard includes plate body, and be arranged on plate body microphone rest area, sound hole and lead sound channel, sound hole and lead sound channel and respectively lead to microphone rest area and operating room from tone chamber, and lead the periphery that sound channel is located at microphone rest area；Operating room is provided with the gathering hole opposite with microphone rest area, and collection plate covers gathering hole, and probe stretches into operating room.Tooling and system of the present invention realize the unification of two class microphone test fixtures, and the operating cost for not only saving p-wire also improves test result Stability and veracity.
Description
Technical field
The present invention relates to electro-acoustic product technical field of measurement and test, more particularly, to carry out the Mike of sensitivity of microphone test
Wind sensitivity test tooling and sensitivity of microphone with this kind of sensitivity of microphone test fixture test system.
Background technology
Sensitivity of microphone refers to the size that microphone exports electric signal under the sound effect of some strength, and sensitivity is got over
Height indicates the acoustic-electric high conversion efficiency of microphone, sensitiveer to the reaction of faint sound signal.Sensitivity of microphone can pass through
Absolute figure characterizes, and can specifically be equal to what microphone output end was exported when microphone input termi-nal feeds 1Pa (94dB) acoustic pressure
Voltage value (dBV), can also be characterized by relative value, can specifically be defined microphone output end and be fed in microphone input termi-nal
It is 0dB that 1V voltages corresponding sensitivity of microphone is exported when 1Pa acoustic pressures.
Since sensitivity of microphone is an important indicator for reflecting microphone property, microphone is equal before manufacture
It needs to carry out sensitivity test, according to the above-mentioned explanation about sensitivity of microphone it is found that its test method should include：Driving
Loud speaker exports voice signal to tested microphone；It obtains and is tested the audio letter that microphone exports after receiving the voice signal
Number；The sensitivity for being tested microphone is calculated according to the sound pressure level of the voice signal and the voltage value of the audio signal.In order to realize
The test method, it is necessary to which corresponding sensitivity of microphone test fixture, existing sensitivity of microphone test fixture root are provided
It is divided into two kinds according to microphone type, sets up first kind quilt on opposite sides separately for pad and acoustic aperture one is as shown in Figure 1
Survey the first kind test fixture of microphone 2a, another kind be it is as shown in Figure 2 be directed to pad and acoustic aperture be located on the same face the
Two classes are tested the second class testing tooling of microphone 2b.
As shown in Figure 1, first kind test fixture includes the internal test cabinet 1a with loud speaker 5a and tested for obtaining
The support plate 13a of the collection plate 3a of the audio signal of microphone 2a outputs, test cabinet 1a have sound hole 133a, and test
Room 1a is only communicated by sound hole 133a with the external world, on collection plate 3a have probe 31a with test when with tested microphone 2a
Pad 21a correspond contact, and then acquire the audio signal for being tested microphone 2a outputs, utilizing first kind test fixture
It when carrying out the sensitivity test of tested microphone 2a, needs tested microphone 2a being placed on support plate 13a, and makes tested wheat
The acoustic aperture 23a of gram wind 2a is located in the coverage area of sound hole 133a, then collection plate 3a is positioned on tested microphone 2a, makes
Probe 31a and corresponding pad 21a are in electrical contact.
As shown in Fig. 2, the second class testing tooling, which equally includes inside, has the test cabinet 1b of loud speaker 5b and for obtaining
The collection plate 3b of the audio signal of tested microphone 2b outputs, unlike, collection plate 3b is combined to form survey with test cabinet 1b
The support plate of room 1b is tried, and opens up sound hole 133b on collection plate 3b, tested Mike is being carried out using the second class testing tooling
It when the sensitivity test of wind 2b, needs tested microphone 2b being placed on collection plate 3b, and makes the acoustic aperture of tested microphone 2b
23b is aligned with sound hole 133b and makes probe 31b and corresponding pad 21b in electrical contact.
Since above-mentioned two class testings tooling has different structures, two differences are just needed to configure in practical operation
P-wire to carry out the sensitivity test of two class microphones respectively, this can not only increase frock cost also and can increase manpower at
This.In addition, above-mentioned second class testing tooling asks the sensitivity test of lapel mike there is also test result is unstable
Topic, this is embodied in：Due to the spacing very little being tested between the pad 21b of microphone 2b, and acoustic aperture 23b is located at pad 21b
Between, thus the sound hole 133b opened up on collection plate 3b can only very little, acoustic aperture 23b and sound hole when this results in test
Whether 133b, which is aligned, to have large effect to test result, and then the consistency of multiple measurement results is caused to be deteriorated, if wanted
Solve the problems, such as that this just must be provided with fine positioning tool to be accurately positioned to tested microphone 2b, but in view of being needed when test
Constantly picking and placeing for a large amount of tested microphones is carried out, if be accurately positioned to tested microphone, it will substantially reduce test effect
Rate influences testing progress, and there is also certain difficulty for the realization of fine positioning tool, this all can largely increase test
Cost；In addition, along with collection plate 3b has certain thickness will be to test cabinet 1b in the case of sound hole 133b very littles
The voice signal of output carries out larger weakening, this will influence the Stability and veracity of test result from other side.
Invention content
It is an object of the present invention to provide a kind of new technical solutions of sensitivity of microphone test fixture, so that it is suitable
It closes and carries out the sensitivity test that two classes are tested microphone.
According to the first aspect of the invention, a kind of sensitivity of microphone test fixture is provided comprising test cabinet is raised one's voice
Device and collection plate with probe, the test cabinet has supporting clapboard, and the test cabinet is divided by the supporting clapboard
Tone chamber and operating room, the loud speaker are mounted in the tone chamber；The supporting clapboard includes plate body and is arranged at the plate
Microphone rest area, sound hole on body and sound channel is led, the microphone rest area is arranged described in being located at for the plate body
On the surface of operating room, the sound hole leads to the microphone rest area from the tone chamber, and the sound channel of leading is in the wheat
The operating room is led in the periphery of gram wind rest area from the tone chamber；The operating room is provided with and microphone rest area phase
To gathering hole, the collection plate covers the gathering hole, and the probe stretches into the operating room.
Preferably, the space that the test cabinet and the collection plate surround is confined space.
Preferably, the sealing ring positioned at the gathering hole periphery is installed in the outer chamber walls of the operating room, it is described to adopt
Collection plate squeezes the sealing ring and is pressed together in the outer chamber walls, to close the gathering hole.
Preferably, the supporting clapboard includes described leading sound channel around the multiple of microphone rest area arrangement.
Preferably, the sound channel (135c) of leading is in using the center of the sound hole (133c) as the sector in the center of circle.
Preferably, the plate body is provided with to form the microphone rest area on the surface of the operating room
Limiting slot.
Preferably, the limiting slot is the imitation-shaped groove to match with the shape of tested microphone.
Preferably, the sensitivity of microphone test fixture further includes liftout attachment, and the supporting clapboard further includes setting
The ejection hole on the plate body is set, the ejection hole leads to the slot bottom of the limiting slot, the liftout attachment from the tone chamber
It is arranged to be used for ejecting tested microphone from the limiting slot through the ejection hole.
Preferably, the sensitivity of microphone test fixture further includes switch straight line driving mechanism, the switch straight line
The linear motion portion of driving mechanism is fixedly connected with the collection plate, to realize the behaviour by the switch straight line driving mechanism
Make closing and the opening of room.
Another object of the present invention is to be based on above-mentioned sensitivity of microphone test fixture, provides one kind and being appropriate for two classes
The sensitivity of microphone of the sensitivity test of tested microphone tests system.
According to the second aspect of the invention, a kind of sensitivity of microphone test system is provided comprising：
Sensitivity of microphone test fixture is the sensitivity of microphone test fixture described in any of the above-described kind；
Drive module, for driving the loud speaker to export voice signal；
Receiving module, the audio signal arrived for obtaining the probe collection；
Computing module, for calculating according to the sound pressure level of the voice signal and the voltage value of the audio signal and being tested wheat
The sensitivity of gram wind；And
Display device, the sensitivity of the tested microphone for showing the computing module output.
It was found by the inventors of the present invention that in the prior art, there is the sensitivity test for carrying out the tested microphone of two classes
The uncurrent problem of test fixture.Therefore, the technical assignment or the technical problem to be solved is that this that the present invention to be realized
It is that field technology personnel never expect or it is not expected that, therefore the present invention is a kind of new technical solution.The wheat of the present invention
Gram wind sensitivity test tooling and system by test cabinet by being divided into tone chamber and operating room, and between tone chamber and operating room
Sound hole is set simultaneously on supporting clapboard and leads sound channel so that tone chamber is tested the sensitivity test of microphone carrying out the first kind
When can by sound hole to the acoustic aperture of tested microphone export voice signal, and carry out the second class be tested microphone it is sensitive
Voice signal can be exported to the acoustic aperture of tested microphone by leading sound channel when degree test, it is achieved that two class microphones are surveyed
The unification of trial work dress, this not only saves the operating cost of p-wire, also because the size of sound hole is no longer tested wheat by the second class
The limitation of gram wind pad spacing and test result Stability and veracity can be improved.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Description of the drawings
It is combined in the description and the attached drawing of a part for constitution instruction shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 is the partial cutaway schematic front view of first kind test fixture；
Fig. 2 is the partial cutaway schematic front view of the second class testing tooling；
Fig. 3 is to be illustrated according to a kind of partial cutaway main view of implementation structure of the sensitivity of microphone test fixture of the present invention
Figure, and show that voice signal is carrying out the propagation when first kind is tested the sensitivity test of microphone using tooling shown in Fig. 3
Path；
Fig. 4 shows voice signal when carrying out the sensitivity test of the tested microphone of the second class using tooling shown in Fig. 3
Propagation path；
Fig. 5 is a kind of schematic top plan view of implementation structure of supporting clapboard shown in Fig. 3；
Fig. 6 is a kind of frame principle figure for embodiment that system is tested according to the sensitivity of microphone of the present invention.
Reference sign：
1a, 1b, 1c- test cabinet；The tone chambers 11c-；
12c- operating rooms；13a- support plates；
13c- supporting clapboards；133a, 133b, 133c- sound hole；
132c- microphones rest area；131a- plate bodys；
135c- leads sound channel；136c- limiting slots；
7c- sealing rings；121c- gathering holes；
The 2a- first kind is tested microphone；The second classes of 2b- are tested microphone；
21a, 21b- pad；23a, 23b- acoustic aperture；
3a, 3b, 3c- collection plate；31a, 31b, 31c- probe；
5a, 5b, 5c- loud speaker；2c- is tested microphone；
C- sensitivity of microphone test fixtures；D- drive modules；
E- receiving modules；F- computing modules；
G- display devices.
Specific implementation mode
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should be noted that：Unless in addition having
Body illustrates that the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
It is illustrative to the description only actually of at least one exemplary embodiment below, is never used as to the present invention
And its application or any restrictions that use.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
In shown here and discussion all examples, 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 indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it need not be further discussed in subsequent attached drawing in a attached drawing.
There is sensitivity test for two class microphones to solve existing sensitivity of microphone test fixture in the present invention
Uncurrent problem provides a kind of new sensitivity of microphone test fixture, as shown in Figures 3 to 5, microphone of the invention
Sensitivity test tooling includes test cabinet 1c, loud speaker 5c and the collection plate 3c with probe 31c, and test cabinet 1c has support
Partition board 13c, and test cabinet 1c is divided into tone chamber 11c and operating room 12c by supporting clapboard 13c, and loud speaker 5c is mounted on tone chamber
In 11c；Supporting clapboard 13c includes plate body 131c, and microphone rest area 132c, the sound hole being arranged on plate body 131c
133c and lead sound channel 135c, wherein microphone rest area 132c is arranged in plate body 131c positioned at the surface of operating room 12c
On, sound hole 133c leads to microphone rest area 132c from tone chamber 11c, i.e. tone chamber 11c is put by sound hole 133c with microphone
It sets area 132c to communicate, and leads sound channel 135c and be then located at the periphery of microphone rest area 132c, and lead to operating room from tone chamber 11c
12c, i.e. tone chamber 11c are communicated by leading sound channel 135c with operating room 12c；Operating room 12c is provided with and microphone rest area
Gathering hole 121c opposite 132c, so that operating personnel or manipulator can be by gathering hole 121c by tested microphone 2c
(first kind is tested microphone 2a and the second class is tested the general designation of microphone 2b), which is placed on the 132c of microphone rest area, carries out spirit
Sensitivity is tested, and above-mentioned collection plate 3c covers gathering hole 121c, and the probe 31c of collection plate 3c is stretched into operating room 12c, with
It is contacted with the pad 21c (general designation of pad 21a and pad 21b) of tested microphone 2c one-to-one correspondence；The microphone rest area
As long as the setting of 132c and sound hole 133c ensures that the pad 21c for the tested microphone 2c being placed on it can be with corresponding probe
31c is in electrical contact, and the entire acoustic aperture 23a for making the first kind be tested microphone 2a is respectively positioned in the coverage area of sound hole 133c i.e.
Can, to ensure the reliable output of audio signal and ensure the stability of test result.Here, for the ease of operation, the present invention surveys
Trial work especially makes microphone rest area 132c mounted in being typically the top for making operating room 12c be located at tone chamber 11c when being tested
The advantages of holding horizontality, this kind test orientation, also resides in without being existed by the tested microphone 2c of additional locking structure limitation
It falls off from the 132c of microphone rest area when gathering hole 121c is not turned off.
As shown in figure 3, carrying out the method that the first kind is tested the sensitivity test of microphone 2a using test fixture of the present invention
For：Tested microphone 2a is placed on microphone rest area 132c upward by gathering hole 121c with the one side with pad 21a
On, at this point, the entire acoustic aperture 23a of tested microphone 2a is respectively positioned in the coverage area of sound hole 133c, so that loud speaker 5c is defeated
The voice signal gone out can be received by sound hole 133c by entire acoustic aperture 23a；Later, collection plate 3c is placed on operating room
On 12c, so that collection plate 3c covers gathering hole 121c, the closing to operating room 12c is realized, at this point, the probe 31c of collection plate 3c
The pad 21a one-to-one correspondence stretched into operating room 12c with tested microphone 2a is in electrical contact.In the test, loud speaker 5c is defeated
The voice signal gone out is received by acoustic aperture 23a by sound hole 133c.
As shown in figure 4, carrying out the method that the second class is tested the sensitivity test of microphone 2b using test fixture of the present invention
For：Tested microphone 2b is placed on microphone rest area 132c upward by gathering hole 121c with the one side with pad 21b
On；Collection plate 3c is placed on operating room 12c, so that collection plate 3c covers gathering hole 121c, realizes the pass to operating room 12c
It closes, at this point, the pad 21b one-to-one correspondence that the probe 31c of collection plate 3c stretches into operating room 12c with tested microphone 2b is electrically connected with
It touches.In the test, the voice signal of loud speaker 5c outputs is entered in operating room 12c by acoustic aperture by leading sound channel 135c
23b is received.
It can be seen that test fixture of the present invention by test cabinet 1c by supporting clapboard 13c due to being divided into tone chamber 11c and behaviour
Make room 12c, and sound hole 133c is set simultaneously on supporting clapboard 13c and leads sound channel 135c, is adopted along with dexterously combining
Collect plate 3c shutoff operations room 12c, therefore tone chamber 11c can be made logical when carrying out the first kind and being tested the sensitivity test of microphone 2a
It crosses sound hole 133c and exports voice signal to the acoustic aperture 23a of tested microphone 2a, and tone chamber 11c is made to carry out the tested wheat of the second class
Voice signal is exported to the acoustic aperture 23b of tested microphone 2b by leading sound channel 135c when the sensitivity test of gram wind 2b, in turn
The unification that two classes are tested microphone test fixture is realized, the operating cost of p-wire is saved.In addition, since the present invention tests
The sound hole 133c of tooling is provided on plate body 131c, therefore do not influenced by tested microphone pad spacing can be with for its size
What is opened up is larger, this is greatly lowered the requirement to being tested the positioning accuracy that microphone is positioned, as long as microphone is made to put
Setting area can make pad and corresponding probe 31c in electrical contact the restriction for being tested microphone position, and the first kind is made to be tested Mike
The acoustic aperture 23a of wind 2a is fully located in the coverage area of sound hole 133c, this allow test fixture of the present invention easily
Ground ensures stability and accuracy that the test result of microphone 2a is tested to the first kind；Again due to test fixture of the present invention into
It is the conduction by leading sound channel 135c realization voice signals when the sensitivity test of the tested microphone 2b of the second class of row, and it is different
The conduction of voice signal is realized by sound hole 133b in existing second class testing tooling, therefore, even if utilizing present invention test
Tooling carries out the sensitivity test that small-sized second class is tested microphone, can also ensure in the case of above-mentioned relatively low positioning accuracy
The stability and accuracy of test result；Test fixture of the present invention described above can ensure to test for two class microphones
As a result there is higher testing efficiency in the case of stability and accuracy.Furthermore due to the pronunciation of test fixture of the present invention
Hole 133c and the size for leading sound channel 135c can be arranged larger, therefore can be controlled to the completion of the weakening degree of voice signal
For system in the range of error allows, this is conducive to the accuracy for ensureing test result in a simple manner.
In order to enable the voice signal that loud speaker 5c is exported with propagated as short as possible to tested microphone 2c's
The opening of acoustic aperture 23c (general designation of acoustic aperture 23a and acoustic aperture 23b), loud speaker 5c are preferably directed towards sound hole 133c settings, and especially
It is that the center line of the opening is made to be overlapped with the center line of sound hole 133c.
In order to improve the accuracy of test result, it is advantageous that it is in table to make the chamber wall of above-mentioned tone chamber 11c and test cabinet 12c
The smooth cylindrical shape in face, to reduce the influence that test cabinet 1c itself propagates voice signal as much as possible.
For improving the accuracy of test result, it is advantageous that test cabinet 1c and collection plate 3c is made to be surrounded when being tested
Space be confined space, in this way, the voice signal of loud speaker 5c output will pass between tone chamber 11c and operating room 12c completely
It broadcasts and then the acoustic aperture 23c for being substantially completely tested microphone 2c is received.In order to enable test cabinet 1c and collection plate 3c testing
When surround a confined space, in addition to so that test cabinet 1c is only communicated with the external world by gathering hole 121c, also to make collection plate 3c
It is sealingly engaged with completely enclosed gathering hole 121c, for this purpose, can be by applying stressed mode by collection plate 3c with test cabinet 1c
It is pressed together in the outer chamber walls of operating room 12c, which can provide and can also be provided by pressue device manually, for the implementation
Example can be positioned in order to realize the closing to gathering hole 121c with smaller pressure in the outer chamber walls of operating room 12c
The sealing ring 7c of the peripheries gathering hole 121c, and then crush seal circle 7c is pressed together in the outer chamber walls of operating room 12c collection plate 3c；Separately
Outside, the closing to gathering hole 121c, in this embodiment, behaviour can be realized with the structure in collection plate 3c embedding operation mouths 12c
Make that the plane sealing structure realized using elastomer may be used between mouth 12c and collection plate 3c, can also use and form phase
The cone-shaped seal structure for the taper surface matched.
In order to enable the above-mentioned sound channel 135c that leads carrying out preferably playing biography when the second class is tested microphone 2b tests
The effect of voice signal is broadcast, as shown in figure 5, supporting clapboard 13c may include surrounding the multiple of microphone rest area 131c arrangements
Lead sound channel 135c.In order to enable the above-mentioned sound channel 135c that leads preferably to be sent out when carrying out the second class and being tested microphone 2b tests
The effect for propagating voice signal is waved, respectively leads sound channel 135c especially in using the center of sound hole 133c as the sector in the center of circle.For
It improves and leads uniformity and synchronism that sound channel 135c propagates voice signal, respectively lead sound channel 135c especially with sound hole
The center of 133c be the center of circle circumference on be uniformly distributed.
Since the probe 31c of collection plate 3c can apply pressure by pad when being tested to tested microphone 2c, because
This can prevent tested microphone 2c from moving during the test to a certain extent, moreover, the present invention surveys according to the above description
Trial work dress to tested microphone 2c without carrying out point-device positioning, and therefore, above-mentioned microphone rest area can be simply
The scribe area being formed on the surfaces plate body 131c is tested the home position of microphone 2c to prompt operating personnel to place, and
It is placed and is tested in the embodiment of microphone 2c using manipulator, which can be even invisible void
Quasi- rest area, because the placement location of tested microphone 2c can realize the positioning of manipulator by controlling program.In addition, such as
Shown in Fig. 3 to Fig. 5, above-mentioned plate body 131c's can be arranged on the surface of operating room 12c for placing tested microphone
Limiting slot 136c can be limited by limiting slot 136c itself be tested Mike in this way to form above-mentioned microphone rest area 132c
Wind 2c moves horizontally degree of freedom on supporting clapboard 13c, and collection plate 3c only need to realize probe 31c between corresponding pad 21c
It is in electrical contact.On this basis, for having in the test of high requirement to the placement orientation for being tested microphone 2c, on
It can be the imitation-shaped groove to match with the shape of tested microphone 2c to state limiting slot 136c, the imitation-shaped groove another advantage is that suitable
It closes and needs to carry out pinpoint application to tested microphone 2c, as long as imitation-shaped groove is simply designed as and tested microphone by this
2c small―gap sutures coordinate.
In order to realize that work is tested in automatically opening and closing for aforesaid operations room 12c, sensitivity of microphone of the invention
Dress can also include switch straight line driving mechanism (not shown), linear motion portion and the acquisition of the switch straight line driving mechanism
Plate 3c is fixedly connected, to realize closing and the opening of operating room 12c by switching straight line driving mechanism, and it is same as pressue device
Pressing between Shi Shixian collection plates 3c and operating room 12c.
In the embodiment of setting limiting slot 136c, taken from limiting slot 136c for the ease of operating personnel or manipulator
Go out tested microphone 2c, the parts tested microphone 2c can be made to be immersed in limiting slot 136c, in order to operating personnel or machinery
Hand crawl is tested microphone 2c.In order to improve the take-off speed of tested microphone 2c, to further increase testing efficiency, the present invention
Sensitivity of microphone test fixture can also include liftout attachment (not shown), for this purpose, above-mentioned supporting clapboard 13c is also answered
This includes the ejection hole being arranged on plate body 131c, which leads to the slot bottom of limiting slot 136c from tone chamber 11c, for ejection
Device ejects tested microphone 2c through ejecting hole from limiting slot 136c.In addition, another advantage of setting liftout attachment exists
Even if in carrying out more accurate positioning to tested microphone 2c by limiting slot 136c, testing efficiency and test will not be influenced
Progress.Above-mentioned liftout attachment, which may be used, pneumatically or electrically waits executive components to realize.
Based on above-mentioned sensitivity of microphone test fixture, as shown in fig. 6, the sensitivity of microphone of the present invention tests system packet
Any of the above-described kind of sensitivity of microphone test fixture c, drive module d, receiving module e, computing module f and display device g are included, it should
Drive module d exports voice signal for drive the speaker 5c, here, drive module d can be driven by power amplifier
Loud speaker 5c exports voice signal；Receiving module e is for obtaining the collected audio signals of probe 31c, here, the reception mould
Block e can obtain the audio signal by audio codec (CODEC)；Computing module f is used for the sound according to voice signal
The voltage value of pressure value and audio signal calculates the sensitivity for being tested microphone 2c；Display device g is for showing that computing module f is defeated
The sensitivity of the tested microphone 2c gone out.
In addition, the sensitivity of microphone test system of the present invention can also include that driving parameter setting module (does not show in figure
Go out), to realize the setting of the driving parameter needed for drive module d.The sensitivity of microphone test system of the present invention can also wrap
Calculating parameter setup module (not shown) is included, to realize the setting of the calculating parameter needed for computing module f.
Above-mentioned drive module d, receiving module e and computing module f can be realized by mutually independent physical unit, also may be used
To be, for example, the physical unit realization of microcontroller, microcontroller by one.And parameter setting module and calculating parameter is driven to set
Setting module can be realized by keyboard.
The various embodiments described above primary focus describes difference from other examples, but those skilled in the art should be clear
Chu, the various embodiments described above can be used alone or be combined with each other as needed.
Although some specific embodiments of the present invention are described in detail by example, the skill of this field
Art personnel it should be understood that example above merely to illustrating, the range being not intended to be limiting of the invention.The skill of this field
Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above example.This hair
Bright range is defined by the following claims.
Claims (9)
1. a kind of sensitivity of microphone test fixture, which is characterized in that including test cabinet（1c）, loud speaker（5c）With with probe
（31c）Collection plate（3c）, the test cabinet（1c）With supporting clapboard（13c）, and the supporting clapboard（13c）By the survey
Try room（1c）It is divided into tone chamber（11c）And operating room（12c）, the loud speaker（5c）Mounted on the tone chamber（11c）In；It is described
Supporting clapboard（13c）Including plate body（131c）And it is arranged at the plate body（131c）On microphone rest area（132c）, hair
Sound hole（133c）With lead sound channel（135c）, the microphone rest area（132c）It is arranged in the plate body（131c）Be located at institute
State operating room（12c）Surface on, the sound hole（133c）From the tone chamber（11c）Lead to the microphone rest area
(132c), it is described to lead sound channel（135c）In the microphone rest area（132c）Periphery from the tone chamber（11c）Lead to institute
State operating room（12c）；The operating room（12c）It is provided with and the microphone rest area（132c）Opposite gathering hole
（121c）, the collection plate（3c）Cover the gathering hole（121c）, and the probe（31c）Stretch into the operating room（121c）
In.
2. sensitivity of microphone test fixture according to claim 1, which is characterized in that the test cabinet（1c）With it is described
Collection plate（3c）The space surrounded is confined space.
3. sensitivity of microphone test fixture according to claim 2, which is characterized in that the operating room（12c）It is outer
It is equipped on locular wall positioned at the gathering hole（121c）The sealing ring of periphery（7c）, the collection plate（3c）Squeeze the sealing ring
（7c）It is pressed together in the outer chamber walls, to close the gathering hole（121c）.
4. sensitivity of microphone test fixture according to claim 1, which is characterized in that the supporting clapboard（13c）Packet
It includes around the microphone rest area（132c）The multiple of arrangement described lead sound channel（135c）.
5. sensitivity of microphone test fixture according to claim 4, which is characterized in that described to lead sound channel（135c）It is in
With the sound hole（133c）Center be the center of circle sector.
6. sensitivity of microphone test fixture according to claim 1, which is characterized in that the plate body（131c）Be located at
The operating room（12c）Surface on be provided with to form the microphone rest area（132c）Limiting slot（136c）.
7. sensitivity of microphone test fixture according to claim 6, which is characterized in that the sensitivity of microphone test
Tooling further includes liftout attachment, the supporting clapboard（13c）Further include being arranged in the plate body（131c）On ejection hole, it is described
Hole is ejected from the tone chamber（11c）Lead to the limiting slot（136c）Slot bottom, the liftout attachment is arranged to be used for through institute
Ejection hole is stated by tested microphone（2c）From the limiting slot（136c）Middle ejection.
8. sensitivity of microphone test fixture according to any one of claim 1 to 7, which is characterized in that the Mike
Wind sensitivity test tooling further include switch straight line driving mechanism, it is described switch straight line driving mechanism linear motion portion with it is described
Collection plate（3c）It is fixedly connected, to realize the operating room by the switch straight line driving mechanism（12c）Closing and opening.
9. a kind of sensitivity of microphone tests system, which is characterized in that including：
Sensitivity of microphone test fixture（c）, it is sensitivity of microphone test fixture described in any item of the claim 1 to 8；
Drive module（d）, for driving the loud speaker（5c）Export voice signal；
Receiving module（e）, for obtaining the probe（31c）Collected audio signal；
Computing module（f）, for calculating according to the sound pressure level of the voice signal and the voltage value of the audio signal and being tested wheat
Gram wind（2c）Sensitivity；And
Display device（g）, for showing the computing module（f）The tested microphone of output（2c）Sensitivity.
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| US9648433B1 (en) * | 2015-12-15 | 2017-05-09 | Robert Bosch Gmbh | Absolute sensitivity of a MEMS microphone with capacitive and piezoelectric electrodes |
| CN105722003A (en) * | 2016-01-20 | 2016-06-29 | 苏州搏技光电技术有限公司 | MEMS microphone testing mechanism |
| CN106291332B (en) * | 2016-09-30 | 2023-01-10 | 深圳市运泰利自动化设备有限公司 | FPC turntable testing machine |
| CN108769885B (en) * | 2018-05-14 | 2024-04-23 | 桂林电子科技大学 | Full-automatic detection and adjustment system for loudspeaker position |
| CN111541983B (en) * | 2020-04-30 | 2022-01-07 | 荣成歌尔电子科技有限公司 | Test apparatus and test system |
| CN111683333B (en) * | 2020-06-19 | 2021-07-30 | 青岛歌尔微电子研究院有限公司 | Microphone testing equipment, calibration method thereof and readable storage medium |
| CN113079450B (en) * | 2021-04-06 | 2022-04-26 | 北京航空航天大学 | Probe type microphone calibration device and method |
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Effective date of registration: 20200806 Address after: 266104 room 103, 396 Songling Road, Laoshan District, Qingdao, Shandong Province Patentee after: Goer Microelectronics Co.,Ltd. Address before: 261031 Dongfang Road, Weifang high tech Development Zone, Shandong, China, No. 268 Patentee before: GOERTEK Inc. |