CN204761716U - Microphone sensitivity test fixture and system - Google Patents
Microphone sensitivity test fixture and system Download PDFInfo
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- CN204761716U CN204761716U CN201520461448.3U CN201520461448U CN204761716U CN 204761716 U CN204761716 U CN 204761716U CN 201520461448 U CN201520461448 U CN 201520461448U CN 204761716 U CN204761716 U CN 204761716U
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Abstract
The utility model discloses a microphone sensitivity test fixture and system, the former includes test cabinet, speaker and has the collection board of probe, and the test cabinet is split into tone chamber and control chamber through support baffle, and the speaker is installed in the tone chamber, support baffle includes the plate body, and the microphone that sets up on the plate body places district, pronunciation hole and lead passageway, the pronunciation hole with lead passageway and access to the microphone respectively from the tone chamber and place district and control chamber, just it is located the periphery that the district was placed to the microphone to lead passageway, the control chamber is provided with places the relative operation mouth in district with the microphone, gather board overlapping operation mouth, and the probe stretches into in the control chamber. The utility model discloses frock and system implementation two types of microphone test fixture's unity, the operating cost of not only having saved the test wire has still improved test result accuracy and stability.
Description
Technical field
The utility model relates to electro-acoustic product technical field of measurement and test, particularly relates to for carrying out the sensitivity of microphone test fixture of sensitivity of microphone test and having the sensitivity of microphone test macro of this kind of sensitivity of microphone test fixture.
Background technology
Sensitivity of microphone refers to that microphone exports the size of the signal of telecommunication under the sound effect of some strength, and sensitivity is higher, represents that the acoustic-electric conversion efficiency of microphone is high, sensitiveer to the reaction of faint sound signal.Sensitivity of microphone can be characterized by absolute figure, specifically can equal the magnitude of voltage (dBV) that microphone output exports when microphone input termi-nal feeds 1Pa (94dB) acoustic pressure, also can be characterized by relative value, specifically can define the sensitivity of microphone that microphone output exports 1V voltage corresponding when microphone input termi-nal feeds 1Pa acoustic pressure is 0dB.
Due to the important indicator that sensitivity of microphone is reflection microphone property, therefore, microphone all needs to carry out sensitivity test before dispatching from the factory, and according to the above-mentioned explanation about sensitivity of microphone, its method of testing should comprise: drive loud speaker output sound signal to tested microphone; Obtain the audio signal that tested microphone exports after receiving this voice signal; The sensitivity of tested microphone is calculated according to the sound pressure level of this voice signal and the magnitude of voltage of this audio signal.In order to realize this method of testing, just need to provide corresponding sensitivity of microphone test fixture, existing sensitivity of microphone test fixture is divided into two kinds according to microphone type, be the first kind test fixture setting up the tested microphone 2a of the first kind on opposite sides for pad and acoustic aperture separately as shown in Figure 1, another kind is the Equations of The Second Kind test fixture of the tested microphone 2b of Equations of The Second Kind be positioned on the same face for pad and acoustic aperture as shown in Figure 2.
As shown in Figure 1, first kind test fixture comprises inside and has the test cabinet 1a of loud speaker 5a and the collection plate 3a for obtaining the audio signal that tested microphone 2a exports, the supporting bracket 13a of this test cabinet 1a has sound hole 133a, and test cabinet 1a communicates with the external world by means of only sound hole 133a, collection plate 3a has probe 31a to contact with the pad 21a one_to_one corresponding of tested microphone 2a when testing, and then gather the audio signal of tested microphone 2a output, when utilizing first kind test fixture to carry out the sensitivity test of tested microphone 2a, tested microphone 2a is needed to be placed on supporting bracket 13a, and make the acoustic aperture 23a of tested microphone 2a be positioned at the coverage of sound hole 133a, again collection plate 3a is positioned on tested microphone 2a, make probe 31a in electrical contact with corresponding pad 21a.
As shown in Figure 2, Equations of The Second Kind test fixture comprises inside equally and has the test cabinet 1b of loud speaker 5b and the collection plate 3b for obtaining the audio signal that tested microphone 2b exports, unlike, this collection plate 3b is combined with test cabinet 1b the supporting bracket forming test cabinet 1b, and sound hole 133b is offered on collection plate 3b, when utilizing Equations of The Second Kind test fixture to carry out the sensitivity test of tested microphone 2b, tested microphone 2b is needed to be placed on collection plate 3b, and the acoustic aperture 23b of tested microphone 2b is alignd with sound hole 133b and makes probe 31b in electrical contact with corresponding pad 21b.
Because above-mentioned two class testing frocks have different structures, in practical operation, therefore just need the different p-wire of configuration two to carry out the sensitivity test of two class microphones respectively, this not only can increase frock cost also can increase human cost.In addition, the problem of test result instability is also there is in above-mentioned Equations of The Second Kind test fixture for the sensitivity test of lapel mike, this is embodied in: due to tested microphone 2b pad 21b between spacing very little, and acoustic aperture 23b is between pad 21b, therefore the sound hole 133b offered on collection plate 3b can only be very little, when this just causes testing, whether alignment can have larger impact to test result to acoustic aperture 23b and sound hole 133b, and then cause the consistency of repetitive measurement result to be deteriorated, if solve this problem just must arrange fine positioning tool accurately to locate tested microphone 2b, but need when considering test to carry out constantly picking and placeing of a large amount of tested microphone, if accurately located tested microphone, greatly will reduce testing efficiency, affect testing progress, and also there is certain difficulty in the realization of fine positioning tool, this all can increase testing cost largely, in addition, add when sound hole 133b is very little collection plate 3b have certain thickness will to test cabinet 1b export voice signal carry out larger weakening, this will affect the Stability and veracity of test result from another aspect.
Utility model content
An object of the present utility model is to provide a kind of new technical scheme of sensitivity of microphone test fixture, is applicable to the sensitivity test carrying out the tested microphone of two classes to make it.
According to first aspect of the present utility model, provide a kind of sensitivity of microphone test fixture, it collection plate comprising test cabinet, loud speaker and there is probe, described test cabinet has supporting clapboard, and described test cabinet is divided into tone chamber and operating room by described supporting clapboard, described loud speaker is arranged in described tone chamber; Described supporting clapboard comprises plate body and the microphone rest area, the sound hole that are all arranged on described plate body and lead sound passage, described microphone rest area is arranged on the surface being positioned at described operating room of described plate body, described sound hole leads to described microphone rest area from described tone chamber, described in lead sound passage and lead to described operating room in the periphery of described microphone rest area from described tone chamber; Described operating room is provided with the gathering hole relative with described microphone rest area, and described collection plate covers described gathering hole, and described probe stretches in described operating room.
Preferably, the space that described test cabinet and described collection plate surround is confined space.
Preferably, the outer chamber walls of described operating room is provided with the sealing ring being positioned at described gathering hole periphery, described collection plate extrudes described sealing ring and is pressed together in described outer chamber walls, to close described gathering hole.
Preferably, described supporting clapboard comprise around described microphone rest area arrange multiple described in lead sound passage.
Preferably, sound passage (135c) is led described in being the fan-shaped of the center of circle with the center of described sound hole (133c).
Preferably, the surface being positioned at described operating room of described plate body is provided with the stopper slot forming described microphone rest area.
Preferably, described stopper slot is the imitation-shaped groove with the mating shapes of tested microphone.
Preferably, described sensitivity of microphone test fixture also comprises liftout attachment, described supporting clapboard also comprises being arranged on described plate body ejects hole, the described bottom land ejecting hole and lead to described stopper slot from described tone chamber, described liftout attachment is set to be ejected from described stopper slot by tested microphone for ejecting hole described in warp.
Preferably, described sensitivity of microphone test fixture also comprises switch straight line driving mechanism, the rectilinear motion portion of described switch straight line driving mechanism is fixedly connected with described collection plate, to be realized the closedown of described operating room by described switch straight line driving mechanism and to open.
Another object of the present utility model is based on above-mentioned sensitivity of microphone test fixture, provides a kind of sensitivity of microphone test macro being applicable to the sensitivity test carrying out the tested microphone of two classes.
According to second aspect of the present utility model, provide a kind of sensitivity of microphone test macro, it comprises:
Sensitivity of microphone test fixture is above-mentioned sensitivity of microphone test fixture described in any one;
Driver module, for driving described loud speaker output sound signal;
Receiver module, for obtaining the audio signal that described probe collection arrives;
Computing module, for calculating the sensitivity of tested microphone according to the sound pressure level of described voice signal and the magnitude of voltage of described audio signal; And,
Display unit, for showing the sensitivity of the described tested microphone that described computing module exports.
A beneficial effect of the present utility model is, sensitivity of microphone test fixture of the present utility model and system are by being divided into tone chamber and operating room by test cabinet, and supporting clapboard between tone chamber and operating room arranged sound hole simultaneously and lead sound passage, make tone chamber can by the acoustic aperture output sound signal of sound hole to tested microphone when carrying out the sensitivity test of the tested microphone of the first kind, and can by leading the acoustic aperture output sound signal of sound passage to tested microphone when carrying out the sensitivity test of the tested microphone of Equations of The Second Kind, therefore the unification of two class microphone test fixtures is achieved, this not only saves the operating cost of p-wire, also because the size of sound hole no longer can improve test result Stability and veracity by the restriction of the tested microphone solder pad space length of Equations of The Second Kind.
By referring to the detailed description of accompanying drawing to exemplary embodiment of the present utility model, further feature of the present utility model and advantage thereof will become clear.
Accompanying drawing explanation
In the description combined and the accompanying drawing forming a part for specification shows embodiment of the present utility model, and illustrate that one is used from and explains principle of the present utility model together with it.
Fig. 1 is the partial cutaway schematic front view of first kind test fixture;
Fig. 2 is the partial cutaway schematic front view of Equations of The Second Kind test fixture;
Fig. 3 is a kind of partial cutaway schematic front view implementing structure according to sensitivity of microphone test fixture of the present utility model, and shows the propagation path of voice signal when utilizing frock shown in Fig. 3 to carry out the sensitivity test of the tested microphone of the first kind;
Fig. 4 shows the propagation path of voice signal when utilizing frock shown in Fig. 3 to carry out the sensitivity test of the tested microphone of Equations of The Second Kind;
A kind of schematic top plan view implementing structure that Fig. 5 is supporting clapboard shown in Fig. 3;
Fig. 6 is the frame principle figure of a kind of execution mode according to sensitivity of microphone test macro of the present utility model.
Description of reference numerals:
1a, 1b, 1c-test cabinet; 11c-tone chamber;
12c-operating room; 13a-supporting bracket;
13c-supporting clapboard; 133a, 133b, 133c-sound hole;
132c-microphone rest area; 131a-plate body;
135c-leads sound passage; 136c-stopper slot;
7c-sealing ring; 121c-gathering hole;
The tested microphone of the 2a-first kind; The tested microphone of 2b-Equations of The Second Kind;
21a, 21b-pad; 23a, 23b-acoustic aperture;
3a, 3b, 3c-collection plate; 31a, 31b, 31c-probe;
5a, 5b, 5c-loud speaker; The tested microphone of 2c-;
C-sensitivity of microphone test fixture; D-driver module;
E-receiver module; F-computing module;
G-display unit.
Embodiment
Various exemplary embodiment of the present utility model is described in detail now with reference to accompanying drawing.It should be noted that: unless specifically stated otherwise, otherwise positioned opposite, the numerical expression of the parts of setting forth in these embodiments and step and numerical value do not limit scope of the present utility model.
Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the utility model and application or use.
May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in the appropriate case, described technology, method and apparatus should be regarded as a part for specification.
In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.
The utility model is in order to solve the sensitivity test uncurrent problem of existing sensitivity of microphone test fixture existence for two class microphones, provide a kind of new sensitivity of microphone test fixture, as shown in Figures 3 to 5, sensitivity of microphone test fixture of the present utility model comprises test cabinet 1c, loud speaker 5c and has the collection plate 3c of probe 31c, this test cabinet 1c has supporting clapboard 13c, and test cabinet 1c is divided into tone chamber 11c and operating room 12c by supporting clapboard 13c, and loud speaker 5c is arranged in tone chamber 11c, this supporting clapboard 13c comprises plate body 131c, and the microphone rest area 132c be all arranged on plate body 131c, sound hole 133c and lead sound passage 135c, wherein, microphone rest area 132c is arranged on the surface being positioned at operating room 12c of plate body 131c, sound hole 133c leads to microphone rest area 132c from tone chamber 11c, namely tone chamber 11c is communicated with microphone rest area 132c by sound hole 133c, lead the periphery that sound passage 135c is then positioned at microphone rest area 132c, and lead to operating room 12c from tone chamber 11c, namely tone chamber 11c communicates with operating room 12c by leading sound passage 135c, this operating room 12c is provided with the gathering hole 121c relative with microphone rest area 132c, by gathering hole 121c, tested microphone 2c (general designation of the first kind tested microphone 2a and Equations of The Second Kind tested microphone 2b) is placed on the enterprising line sensitivity test of microphone rest area 132c to enable operating personnel or manipulator, above-mentioned collection plate 3c covers this gathering hole 121c, and the probe 31c of collection plate 3c stretches in this operating room 12c, to contact with the pad 21c of the tested microphone 2c general designation of pad 21b (the pad 21a with) one_to_one corresponding, as long as the setting of this microphone rest area 132c and sound hole 133c ensures that the pad 21c of the tested microphone 2c be placed on it can be in electrical contact with corresponding probe 31c, and make the whole acoustic aperture 23a of the first kind tested microphone 2a all be positioned at the coverage of sound hole 133c, to ensure the reliable output of audio signal and to ensure the stability of test result.At this, for the ease of operation, the utility model test fixture normally makes operating room 12c be positioned at above tone chamber 11c when testing, particularly make microphone rest area 132c keep level, being also advantageous in that of this kind of test orientation limits tested microphone 2c come off from microphone rest area 132c when gathering hole 121c does not close without the need to the latch-up structure by adding.
As shown in Figure 3, the method utilizing the utility model test fixture to carry out the sensitivity test of the first kind tested microphone 2a is: being faced up with one with pad 21a by gathering hole 121c by tested microphone 2a is placed on the 132c of microphone rest area, now, the whole acoustic aperture 23a of tested microphone 2a is all positioned at the coverage of sound hole 133c, is received by sound hole 133c with the voice signal enabling loud speaker 5c export by whole acoustic aperture 23a; Afterwards, collection plate 3c is placed on operating room 12c, to make collection plate 3c overlapping operation mouth 121c, realizes the closedown to operating room 12c, now, the probe 31c of collection plate 3c stretches in operating room 12c in electrical contact with the pad 21a one_to_one corresponding of tested microphone 2a.In this test, the voice signal that loud speaker 5c exports is received by acoustic aperture 23a by sound hole 133c.
As shown in Figure 4, the method utilizing the utility model test fixture to carry out the sensitivity test of Equations of The Second Kind tested microphone 2b is: being faced up with one with pad 21b by gathering hole 121c by tested microphone 2b is placed on the 132c of microphone rest area; Be placed on by collection plate 3c on operating room 12c, to make collection plate 3c overlapping operation mouth 121c, realize the closedown to operating room 12c, now, the probe 31c of collection plate 3c stretches in operating room 12c in electrical contact with the pad 21b one_to_one corresponding of tested microphone 2b.In this test, the voice signal that loud speaker 5c exports enters into operating room 12c received by acoustic aperture 23b by leading sound passage 135c.
As can be seen here, the utility model test fixture is owing to being divided into tone chamber 11c and operating room 12c by supporting clapboard 13c by test cabinet 1c, and sound hole 133c is set on supporting clapboard 13c simultaneously and leads sound passage 135c, add dexterously in conjunction with collection plate 3c shutoff operation room 12c, therefore, it is possible to make tone chamber 11c when carrying out the sensitivity test of the first kind tested microphone 2a by the acoustic aperture 23a output sound signal of sound hole 133c to tested microphone 2a, and make tone chamber 11c when carrying out the sensitivity test of Equations of The Second Kind tested microphone 2b by leading the acoustic aperture 23b output sound signal of sound passage 135c to tested microphone 2b, and then achieve the unification of the tested microphone test fixture of two classes, save the operating cost of p-wire.In addition, sound hole 133c due to the utility model test fixture is arranged on plate body 131c, what therefore its size can not offered by the impact of tested microphone solder pad space length is larger, this just greatly reduces the requirement to the positioning precision that tested microphone positions, as long as enable the restriction of microphone rest area to tested microphone position make pad in electrical contact with corresponding probe 31c, and make the acoustic aperture 23a of the tested microphone 2a of the first kind be positioned at the coverage of sound hole 133c completely, this makes the utility model test fixture can ensure stability to the test result of the tested microphone 2a of the first kind and accuracy easily, again because the utility model test fixture is the conduction realizing voice signal by leading sound passage 135c when carrying out the sensitivity test of the tested microphone 2b of Equations of The Second Kind, and be different from existing Equations of The Second Kind test fixture realizes voice signal conduction by sound hole 133b, therefore, even if utilize the utility model test fixture to carry out the sensitivity test of the tested microphone of small-sized Equations of The Second Kind, stability and the accuracy of test result also can be ensured when above-mentioned lower positioning precision, more than illustrate that the utility model test fixture all can have higher testing efficiency when ensureing stability and the accuracy of test result for two class microphones.Moreover, due to the utility model test fixture sound hole 133c and lead that the size of sound passage 135c all can arrange larger, therefore complete the weakening degree of voice signal in the scope that can control to allow in error, this is conducive to the accuracy ensureing test result in a straightforward manner.
The voice signal exported to enable loud speaker 5c with propagated short as far as possible to the acoustic aperture 23c (general designation of acoustic aperture 23a and acoustic aperture 23b) of tested microphone 2c, the opening of this loud speaker 5c is preferably arranged towards sound hole 133c, and particularly makes the center line of this opening overlap with the center line of sound hole 133c.
In order to improve the accuracy of test result, the chamber wall of above-mentioned tone chamber 11c and test cabinet 12c is advantageously made to be ganoid cylindrical shape, to reduce the impact that test cabinet 1c itself propagates voice signal as much as possible.
For the accuracy improving test result, the space advantageously making test cabinet 1c and collection plate 3c surround when testing is confined space, like this, the voice signal that loud speaker 5c exports is propagated complete and then is received by the acoustic aperture 23c of tested microphone 2c substantially completely between tone chamber 11c and operating room 12c.A confined space is surrounded when testing in order to enable test cabinet 1c and collection plate 3c, except making except test cabinet 1c to communicate with the external world by means of only gathering hole 121c, collection plate 3c and test cabinet 1c sealed engagement also will be made with complete " locked in " operation mouth 121c, for this reason, collection plate 3c can be pressed together in the outer chamber walls of operating room 12c by executing stressed mode, this pressure manually can be provided and also can be provided by pressue device, for this embodiment, in order to closing gathering hole 121c can be realized with less pressure, the sealing ring 7c of gathering hole 121c periphery can be positioned in the outer chamber walls of operating room 12c, collection plate 3c then crush seal circle 7c is pressed together in the outer chamber walls of operating room 12c, in addition, structure in all right collection plate 3c embedding operation mouth 12c realizes closing gathering hole 121c, in this embodiment, the plane sealing structure utilizing elastomer to realize can be adopted between gathering hole 12c and collection plate 3c, also can adopt the cone-shaped seal structure forming the taper surface matched.
In order to enable the above-mentioned sound passage 135c that leads play the effect of propagating voice signal preferably when carrying out the tested microphone 2b of Equations of The Second Kind and testing, as shown in Figure 5, this supporting clapboard 13c can comprise arrange around microphone rest area 131c multiplely lead sound passage 135c.In order to enable the above-mentioned sound passage 135c that leads carrying out playing the effect of propagating voice signal better when the tested microphone 2b of Equations of The Second Kind tests, respectively lead sound passage 135c particularly fan-shaped in what be the center of circle with the center of sound hole 133c.Leading to improve uniformity and the synchronism that sound passage 135c propagates voice signal, respectively leading sound passage 135c particularly being circumferentially uniformly distributed of being the center of circle with the center of sound hole 133c.
Because the probe 31c of collection plate 3c can apply pressure by pad to tested microphone 2c when testing, therefore can prevent tested microphone 2c from moving in test process to a certain extent, and, the utility model test fixture is without the need to carrying out point-device location to tested microphone 2c according to the above description, therefore, above-mentioned microphone rest area can be formed at the scribe area on plate body 131c surface simply, the home position of tested microphone 2c is placed with alert, and utilizing manipulator to place in the execution mode of tested microphone 2c, this microphone rest area 132c can be even invisible virtual rest area, because the placement location of tested microphone 2c can be realized the location of manipulator by control program.In addition, as shown in Figures 3 to 5, the surface being positioned at operating room 12c of above-mentioned plate body 131c can be arranged the stopper slot 136c for placing tested microphone, to form above-mentioned microphone rest area 132c, so just, limit tested microphone 2c by stopper slot 136c itself and move horizontally the degree of freedom on supporting clapboard 13c, and that collection plate 3c only needs to realize between probe 31c with corresponding pad 21c is in electrical contact.On this basis, for having in the test of high requirement to the placement orientation of tested microphone 2c, above-mentioned stopper slot 136c can be the imitation-shaped groove with the mating shapes of tested microphone 2c, another advantage of this imitation-shaped groove is that being applicable to needs carries out pinpoint application to tested microphone 2c, as long as imitation-shaped groove is designed to coordinate with tested microphone 2c small―gap suture by simply.
In order to automatically opening and closedown of aforesaid operations room 12c can be realized, sensitivity of microphone test fixture of the present utility model can also comprise switch straight line driving mechanism (not shown), the rectilinear motion portion of this switch straight line driving mechanism is fixedly connected with collection plate 3c, to be realized the closedown of operating room 12c by switch straight line driving mechanism and to open, and realize the pressing between collection plate 3c and operating room 12c as pressue device simultaneously.
In the embodiment that stopper slot 136c is set, from stopper slot 136c, tested microphone 2c is taken out for the ease of operating personnel or manipulator, tested microphone 2c part can be made to be immersed in stopper slot 136c, so that operating personnel or manipulator capture tested microphone 2c.In order to improve the take-off speed of tested microphone 2c, to improve testing efficiency further, sensitivity of microphone test fixture of the present utility model can also comprise liftout attachment (not shown), for this reason, above-mentioned supporting clapboard 13c also should comprise being arranged on plate body 131c ejects hole, this ejects stopper slot 136c is led in hole bottom land from tone chamber 11c, is ejected by tested microphone 2c through ejecting hole for liftout attachment from stopper slot 136c.In addition, even if another advantage arranging liftout attachment is to be located comparatively accurately tested microphone 2c by stopper slot 136c, also testing efficiency and testing progress can not be affected.Above-mentioned liftout attachment can adopt the executive component such as pneumatic or electronic to realize.
Based on above-mentioned sensitivity of microphone test fixture, as shown in Figure 6, sensitivity of microphone test macro of the present utility model comprises above-mentioned any one sensitivity of microphone test fixture c, driver module d, receiver module e, computing module f and display unit g, this driver module d is for driving loud speaker 5c output sound signal, at this, this driver module d can drive loud speaker 5c output sound signal by power amplifier; The audio signal that this receiver module e collects for obtaining probe 31c, at this, this receiver module d can pass through audio codec (CODEC) and obtain this audio signal; This computing module f is used for the sensitivity calculating tested microphone 2c according to the sound pressure level of voice signal and the magnitude of voltage of audio signal; This display unit g is for showing the sensitivity of the tested microphone 2c of computing module f output.
In addition, sensitivity of microphone test macro of the present utility model can also comprise driving parameter setting module (not shown), to realize the setting of the driving parameter needed for driver module d.Sensitivity of microphone test macro of the present utility model can also comprise calculating parameter and arrange module (not shown), to realize the setting of the calculating parameter needed for computing module f.
Above-mentioned driver module d, receiver module e and computing module f can be realized by separate physical location, also can be such as the physical location realization of single-chip microcomputer, microcontroller by one.And drive parameter setting module and calculating parameter to arrange module can be realized by keyboard.
The various embodiments described above primary focus describes the difference with other embodiments, but it will be clear for those skilled in the art that the various embodiments described above can be used alone as required or be combined with each other.
Although be described in detail specific embodiments more of the present utility model by example, it should be appreciated by those skilled in the art, above example is only to be described, instead of in order to limit scope of the present utility model.It should be appreciated by those skilled in the art, when not departing from scope and spirit of the present utility model, above embodiment can be modified.Scope of the present utility model is limited by claims.
Claims (9)
1. a sensitivity of microphone test fixture, it is characterized in that, comprise test cabinet (1c), loud speaker (5c) and there is the collection plate (3c) of probe (31c), described test cabinet (1c) has supporting clapboard (13c), and described test cabinet (1c) is divided into tone chamber (11c) and operating room (12c) by described supporting clapboard (13c), described loud speaker (5c) is arranged in described tone chamber (11c), described supporting clapboard (13c) comprises plate body (131c) and is all arranged on the microphone rest area (132c) on described plate body (131c), sound hole (133c) and lead sound passage (135c), described microphone rest area (132c) is arranged on the surface being positioned at described operating room (12c) of described plate body (131c), described sound hole (133c) leads to described microphone rest area (132c) from described tone chamber (11c), described sound passage (135c) of leading leads to described operating room (12c) in the periphery of described microphone rest area (132c) from described tone chamber (11c), described operating room (12c) is provided with the gathering hole (121c) relative with described microphone rest area (132c), described collection plate (3c) covers described gathering hole (121c), and described probe (31c) stretches in described operating room (121c).
2. sensitivity of microphone test fixture according to claim 1, is characterized in that, the space that described test cabinet (1c) and described collection plate (3c) surround is confined space.
3. sensitivity of microphone test fixture according to claim 2, it is characterized in that, the outer chamber walls of described operating room (12c) is provided with the sealing ring (7c) being positioned at described gathering hole (121c) periphery, described collection plate (3c) extrudes described sealing ring (7c) and is pressed together in described outer chamber walls, to close described gathering hole (121c).
4. sensitivity of microphone test fixture according to claim 1, is characterized in that, described supporting clapboard (13c) comprise around described microphone rest area (132c) arrange multiple described in lead sound passage (135c).
5. sensitivity of microphone test fixture according to claim 4, is characterized in that, described in lead sound passage (135c) in being the fan-shaped of the center of circle with the center of described sound hole (133c).
6. sensitivity of microphone test fixture according to claim 1, it is characterized in that, the surface being positioned at described operating room (12c) of described plate body (131c) is provided with the stopper slot (136c) forming described microphone rest area (132c).
7. sensitivity of microphone test fixture according to claim 6, it is characterized in that, described sensitivity of microphone test fixture also comprises liftout attachment, described supporting clapboard (13c) also comprises being arranged on described plate body (131c) ejects hole, the described bottom land ejecting hole and lead to described stopper slot (136c) from described tone chamber (11c), described liftout attachment is set to be ejected from described stopper slot (136c) by tested microphone (2c) for ejecting hole described in warp.
8. sensitivity of microphone test fixture according to any one of claim 1 to 7, it is characterized in that, described sensitivity of microphone test fixture also comprises switch straight line driving mechanism, the rectilinear motion portion of described switch straight line driving mechanism is fixedly connected with described collection plate (3c), to be realized the closedown of described operating room (12c) by described switch straight line driving mechanism and to open.
9. a sensitivity of microphone test macro, is characterized in that, comprising:
Sensitivity of microphone test fixture (c), the sensitivity of microphone test fixture according to any one of claim 1 to 8;
Driver module (d), for driving described loud speaker (5c) output sound signal;
Receiver module (e), for obtaining the audio signal that described probe (31c) collects;
Computing module (f), for calculating the sensitivity of tested microphone (2c) according to the sound pressure level of described voice signal and the magnitude of voltage of described audio signal; And,
Display unit (g), for showing the sensitivity of the described tested microphone (2c) that described computing module (f) exports.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520461448.3U CN204761716U (en) | 2015-06-30 | 2015-06-30 | Microphone sensitivity test fixture and system |
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| CN201520461448.3U CN204761716U (en) | 2015-06-30 | 2015-06-30 | Microphone sensitivity test fixture and system |
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| CN204761716U true CN204761716U (en) | 2015-11-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104954966A (en) * | 2015-06-30 | 2015-09-30 | 歌尔声学股份有限公司 | Microphone sensitivity test tool and system |
| CN108235214A (en) * | 2017-12-28 | 2018-06-29 | 上海传英信息技术有限公司 | A kind of cavity for test horn and the acoustic test equipment with the cavity |
-
2015
- 2015-06-30 CN CN201520461448.3U patent/CN204761716U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104954966A (en) * | 2015-06-30 | 2015-09-30 | 歌尔声学股份有限公司 | Microphone sensitivity test tool and system |
| CN104954966B (en) * | 2015-06-30 | 2018-10-12 | 歌尔股份有限公司 | A kind of sensitivity of microphone test fixture and system |
| CN108235214A (en) * | 2017-12-28 | 2018-06-29 | 上海传英信息技术有限公司 | A kind of cavity for test horn and the acoustic test equipment with the cavity |
| CN108235214B (en) * | 2017-12-28 | 2021-04-30 | 上海传英信息技术有限公司 | Cavity for testing horn and acoustic testing equipment with cavity |
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Address after: 261031 Dongfang Road, Weifang high tech Development Zone, Shandong, China, No. 268 Patentee after: Goertek Inc. Address before: 261031 Dongfang Road, Weifang high tech Development Zone, Shandong, China, No. 268 Patentee before: Goertek Inc. |
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