CN112333620A - Microphone calibration detection device - Google Patents
Microphone calibration detection device Download PDFInfo
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- CN112333620A CN112333620A CN202011392028.6A CN202011392028A CN112333620A CN 112333620 A CN112333620 A CN 112333620A CN 202011392028 A CN202011392028 A CN 202011392028A CN 112333620 A CN112333620 A CN 112333620A
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- microphone
- calibration
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- supporting portion
- mouth
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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
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
The invention discloses a microphone calibration detection device, which is used for detecting a product microphone on a product, and comprises: simulating a mouth; the positioning assembly is arranged opposite to the simulation nozzle, and the product is arranged on the positioning assembly; and the calibration microphone is arranged on the side surface of the positioning component deviating from the simulation mouth. The technical scheme of the invention aims to improve the detection accuracy of the product microphone.
Description
Technical Field
The invention relates to the technical field of acoustic testing, in particular to a microphone calibration and detection device.
Background
In the process of calibrating the microphone detection device by using the calibration microphone, the calibration microphone is usually arranged at a position between the simulation mouth and the positioning component, after the device is calibrated by using the calibration microphone, the product microphone is detected, and the calibration microphone and a bracket for installing the calibration microphone generate interference on a sound field and are introduced into a test system to influence the detection result of the product microphone.
Disclosure of Invention
The invention mainly aims to provide a microphone calibration detection device, aiming at improving the detection accuracy of a microphone product.
In order to achieve the above object, the present invention provides a microphone calibration detecting device for detecting a product microphone on a product, the microphone calibration detecting device comprising:
simulating a mouth;
the positioning assembly is arranged opposite to the simulation nozzle, and the product is arranged on the positioning assembly; and
and the calibration microphone is arranged on the side surface of the positioning component deviating from the simulation mouth.
Optionally, the microphone calibration detection device further comprises a calibration installation part, the calibration microphone is installed in the calibration installation part, and the calibration installation part is magnetically adsorbed on the side face of the simulation mouth, which is deviated from the positioning component.
Optionally, the calibration installation part is provided with an accommodating groove, and the calibration microphone is clamped in the accommodating groove.
Optionally, two product microphones are disposed on the product, and the calibration microphone is located on a midline of a connecting line of the two product microphones.
Optionally, the positioning assembly comprises an installation table and a supporting part, the installation table and the simulation nozzle are arranged oppositely, the supporting part is arranged on the installation table in a protruding mode, and a clamping groove used for clamping the product is concavely arranged on the supporting part.
Optionally, the supporting portion extends from a side of the mounting table away from the simulated mouth toward the simulated mouth, and the clamping groove is arranged on the supporting portion perpendicular to the extending direction of the supporting portion.
Optionally, a limiting groove is formed in the mounting table, and the product is limited in the limiting groove.
Optionally, the supporting portion is located at a side of the mounting table, and the calibration microphone is connected to the mounting table and located at a side of the supporting portion away from the limiting groove.
Optionally, the microphone calibration and detection device includes a substrate, the simulation mouth and the positioning component are both mounted on the substrate, and the substrate is provided with a sound absorption structure.
Optionally, the locating component includes a tooling bottom plate, the tooling bottom plate is connected with the substrate and covers a part of the sound-absorbing structure, the mounting table is arranged on the tooling bottom plate, the tooling bottom plate is provided with a hollow part, and part of the sound-absorbing structure is exposed by the hollow part.
The microphone calibration detection device in the technical scheme of the invention comprises a calibration microphone, wherein the calibration microphone is arranged on the side surface of the positioning component deviating from the simulation mouth, so that the calibration microphone is not positioned between the simulation mouth and the positioning component, the calibration microphone and parts for installing the calibration microphone are not positioned between the simulation mouth and the positioning component, and the sound field in the product microphone detection process on a product is not influenced. Even if the calibration microphone is removed after the microphone calibration detection device is calibrated by the calibration microphone, the removal of the calibration microphone has less influence on the sound field of the whole device and has less influence on the detection of the subsequent product microphone, so that the detection accuracy of the microphone calibration detection device on the product microphone is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a microphone calibration and detection apparatus according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
fig. 3 is a schematic view of the structure of fig. 2 with the product removed.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a microphone calibration detecting device 100 for detecting a product microphone on a product 200. The microphone calibration and detection device 100 comprises a shielding box (not shown), wherein an artificial mouth 11 and a positioning assembly 30 are arranged in the shielding box, the positioning assembly 30 is arranged opposite to the artificial mouth 11, the positioning assembly 30 is used for mounting a product 200, and the artificial mouth 11 is used for providing a standard sound source for the acoustic detection of a microphone of the product 200.
The shielding box specifically comprises a substrate 50, the simulation nozzle 11 and the positioning assembly 30 are both mounted on the substrate 50, the substrate 50 is provided with a sound-absorbing structure, the sound-absorbing structure can be sound-absorbing cotton, and partial sound waves of the substrate 50 can be absorbed so as to reduce the reflection of the substrate 50 to the sound waves. Still be equipped with the guide rail on the base plate 50, the one end of this guide rail is close to locating component 30, the other end orientation extends towards the direction of keeping away from locating component 30, be equipped with the emulation workstation 13 of connecting in the guide rail in the shielded cell, emulation mouth 11 is installed on emulation workstation 13, emulation workstation 13 can connect the driving piece, the driving piece can drive emulation workstation 13 and carry out reciprocating motion along the extending direction of guide rail, can make emulation mouth 11 be close to locating component 30 or keep away from locating component 30, with the distance between regulation emulation mouth 11 and product 200.
The microphone calibration detecting device 100 in the technical solution of the present invention includes the calibration microphone 43, the calibration microphone 43 is disposed on the side of the positioning component 30 deviating from the simulated mouth 11, so that the calibration microphone 43 is not located between the simulated mouth 11 and the positioning component 30, the calibration microphone 43 and the parts for mounting the calibration microphone 43 are not located between the simulated mouth 11 and the positioning component 30, and the sound field in the product microphone detecting process on the product 200 is not affected. Even if the calibration microphone 43 is removed after the microphone calibration detecting device 100 is calibrated by using the calibration microphone 43, the removal of the calibration microphone 43 has less influence on the sound field of the whole device and less influence on the detection of the subsequent product microphone, so that the detection accuracy of the product microphone by the microphone calibration detecting device 100 is improved.
The microphone calibration detecting device 100 further includes a calibration mounting portion 41, the calibration microphone 43 is mounted on the calibration mounting portion 41, and the calibration mounting portion 41 is magnetically attached to a side of the positioning member 30 away from the dummy nozzle 11. Specifically, a first magnetic member may be disposed on one of the calibration mounting portion 41 and the positioning assembly 30, and a second magnetic member may be disposed at a corresponding position of the other of the calibration mounting portion and the positioning assembly, where the first magnetic member and the second magnetic member are capable of attracting each other, and both the first magnetic member and the second magnetic member may be magnets with opposite polarities, or one of the first magnetic member and the second magnetic member may be a magnet, and the other one of the first magnetic member and the second magnetic member is a metal member capable of being attracted by the magnet.
This calibration installation department 41 is connected in locating component 30 through magnetic adsorption's mode, is convenient for calibrate the installation of microphone 43 and withdraws, and this calibration microphone 43 is located locating component 30's side for the calibration installation department 41 of installation calibration microphone 43 is less to the sound field influence of the sound source that emulation mouth 11 produced, and it is less to carry out the testing process influence to subsequent product microphone, makes this microphone calibration detection device 100 good to product microphone detection effect, and detection accuracy improves.
With reference to fig. 2 and 3, the calibration microphone 43 may be mounted on the calibration mounting portion 41 in a variety of ways, and specifically, a receiving groove 411 may be provided on the calibration mounting portion 41, and the calibration microphone 43 is held in the receiving groove 411. The inner dimension of the accommodating groove 411 is consistent with the outer dimension of the calibration microphone 43, when the calibration microphone 43 is installed, the calibration microphone 43 is directly clamped in the accommodating groove 411 of the calibration installation part 41, and the calibration installation part 41 not only can firmly fix the calibration microphone 43, but also has simple connection operation of the calibration microphone 43.
The calibration microphone 43 may be cylindrical in shape, and the accommodating groove 411 may also be a cylindrical through hole, and an opening communicating with the outside is formed in one side of the through hole, so that the accommodating groove 411 is convenient to machine and form, and the calibration microphone 43 can be conveniently mounted and taken out. Raised flange in can setting up in the holding tank 411 mutually, correspondingly, be equipped with the backstop portion with flange matched with on the lateral wall of calibration microphone 43, with calibration microphone 43 by the one end of through-hole pack into holding tank 411 after, backstop portion on the calibration microphone 43 carries out the backstop by the flange for calibration microphone 43 can not drop by the other end of through-hole, guarantees the reliability that calibration microphone 43 and calibration installation department 41 are connected. The diaphragm of the calibration microphone 43 is located at its end, i.e. the sound-receiving surface of the calibration microphone is located at its end, the sound-receiving surface of the calibration microphone 43 being parallel to the sound field surface.
The product 200 to be tested by the microphone calibration and test device 100 is usually provided with two product microphones, and the calibration microphone 43 is located on the center line of the connection line of the two product microphones to ensure that the sound intensities received by the two product microphones in the sound field after calibration are consistent, so as to ensure the consistency of a plurality of test parameters.
The positioning assembly 30 comprises an installation platform 35 and a supporting portion 37, the installation platform 35 is arranged opposite to the simulation nozzle 11, the supporting portion 37 is convexly arranged on the installation platform 35, and a clamping groove 371 used for clamping the product 200 is concavely arranged on the supporting portion 37. The product 200 can be directly clamped on the clamping groove 371 of the supporting portion 37, the product 200 is not required to be compressed by a compression structure, and compared with the traditional microphone calibration detection device 100, the compression structure for compressing the product 200 can be omitted, so that the reflection of the part of structure to sound waves is reduced, and the accuracy of the microphone calibration detection device 100 for detecting the product microphone is further improved.
The specific structure of the supporting portion 37 may be such that the supporting portion 37 extends from the side of the mounting table 35 away from the simulated nozzle 11 toward the simulated nozzle 11, and the locking groove 371 is provided in the supporting portion 37 perpendicular to the extending direction of the supporting portion 37. That is, the supporting portion 37 may have a flat wall structure, the supporting portion 37 has an extending direction extending from the mounting table 35 to the simulated mouth 11, and the locking groove 371 on the supporting portion 37 can allow the product 200 to be inserted and locked into the locking groove 371 along a mounting direction perpendicular to the wall.
While the supporting portion 37 is clamping the product 200, the mounting table 35 can also support the product 200, so that the product 200 is more stably connected to the positioning assembly 30, and the product 200 has better stability in the testing process. A limiting groove 351 can be formed in the mounting table 35, and a part of the structure of the product 200 is limited by the limiting groove 351.
With further reference to fig. 2, the product 200 may be a wireless headset, which may be a true wireless headset, which may comprise a head 201 and a handle 202, the head 201 of the wireless headset being a part to be worn in an ear canal of a human body, the handle 202 of the wireless headset being connected to the head 201, and being able to be used to provide a charging means as well as a charging terminal. The sound hole 203 of the wireless headset may be provided in the handle 202, and a microphone corresponding to the sound hole 203 is provided in the handle 202, i.e. external sound enters through the sound hole 203 and can be picked up by the microphone. The wireless earphone is installed in the positioning assembly 30 by a mounting manner that the handle 202 is clamped by the clamping groove 371 on the supporting portion 37, the limiting groove 351 on the mounting table 35 is matched with the appearance of the head 201, and the head 201 can be limited in the limiting groove 351 in the process that the handle 202 is clamped by the clamping groove 371, so that the wireless earphone is stably installed on the positioning assembly 30.
When the product 200 is a wireless earphone, the wireless earphone is mounted on the supporting portion 37 and the mounting table 35, and the two sound holes 203 on the handle 202 are disposed upward, that is, the sound receiving surfaces of the two product microphones on the wireless earphone are disposed upward, that is, the sound receiving surfaces of the two product microphones on the handle 202 face a direction away from the substrate 50 and are parallel to the sound field surface, so that the reflection of the product 200 itself to the sound field is reduced to the greatest extent.
The supporting portion 37 protruding from the mounting platform 35 may be located on a side of the mounting platform 35, the calibration microphone 43 is connected to the mounting platform 35 and located on a side of the supporting portion 37 away from the limiting groove 351, and the calibration microphone 43 is connected to the mounting platform 35 through the calibration mounting portion 41, so that the sound receiving surface of the calibration microphone 43 is lower than the supporting portion 37, and the sound receiving surface of the calibration microphone 43 is lower than the product microphone.
When the product 200 is a wireless headset, the head 201 of the wireless headset is limited in the limit groove 351 on the mounting platform 35, the handle 202 of the wireless headset is inserted into and clamped in the clamp groove 371 of the support 37, and extends toward the support 37 in a direction away from the limit groove 351, so that the projections of the two product microphones of the handle 202 on the horizontal plane are respectively located on two sides of the projection of the calibration microphone 43 on the horizontal plane, that is, the calibration microphone 43 can be located on the central axis of the connection line of the two product microphones.
The positioning assembly 30 further comprises a support 33 and a tooling bottom plate 31, the tooling bottom plate 31 is connected and fixed on the substrate 50, one end of the support 33 is connected to the tooling bottom plate 31, the other end of the support 33 is connected to the mounting table 35, the mounting table 35 is fixed on the tooling bottom plate 31, and the mounting table 35 is lifted to a height close to the position of the simulation nozzle 11. The support 33 may be in the form of at least one connecting post to reduce reflections of sound waves.
The tooling bottom plate 31 connected to the substrate 50 covers at least part of the sound-absorbing structure, the mounting table 35 is arranged on the tooling bottom plate 31, the tooling bottom plate 31 is provided with a hollow part 311, and part of the sound-absorbing structure is exposed by the hollow part 311. The hollow part 311 formed in the tool bottom plate 31 can allow sound waves to contact the sound absorption structure covered by the tool bottom plate 31 originally, so that the sound absorption structure exposed by the hollow part 311 can absorb the sound waves, and the sound absorption cotton can be fully played to reduce the reflection of the sound waves.
The improved microphone calibration and detection device 100 can improve the detection accuracy of product microphones, so that the consistency of the frequency response curves of the two product microphones is improved, and the consistency of the phase difference between the two product microphones is improved.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A microphone calibration detection device for detecting a product microphone on a product, the microphone calibration detection device comprising:
simulating a mouth;
the positioning assembly is arranged opposite to the simulation nozzle, and the product is arranged on the positioning assembly; and
and the calibration microphone is arranged on the side surface of the positioning component deviating from the simulation mouth.
2. The microphone calibration test device of claim 1, further comprising a calibration mounting portion, wherein the calibration microphone is mounted to the calibration mounting portion, and the calibration mounting portion is magnetically attached to a side of the positioning assembly that is offset from the simulated mouth.
3. The microphone calibration detecting device according to claim 2, wherein the calibration mounting portion is provided with a receiving groove, and the calibration microphone is held in the receiving groove.
4. The microphone calibration test device of claim 1, wherein two product microphones are provided on the product, and the calibration microphone is located on a centerline connecting the two product microphones.
5. The microphone calibration detecting device as claimed in any one of claims 1 to 4, wherein the positioning assembly includes a mounting platform and a supporting portion, the mounting platform is disposed opposite to the simulation mouth, the supporting portion is disposed in the mounting platform in a protruding manner, and a slot for clamping the product is disposed in the supporting portion in a recessed manner.
6. The microphone calibration detecting device according to claim 5, wherein the supporting portion extends from a side of the mounting platform away from the dummy mouth toward the dummy mouth, and the engaging groove opens in the supporting portion perpendicular to the extending direction of the supporting portion.
7. The microphone calibration detecting device according to claim 5, wherein a limiting groove is provided on the mounting table, and the product is limited in the limiting groove.
8. The microphone calibration detecting device according to claim 7, wherein the supporting portion is located at a side of the mounting table, and the calibration microphone is connected to the mounting table and located at a side of the supporting portion away from the limiting groove.
9. The microphone calibration test device of claim 1, wherein the microphone calibration test device includes a substrate, the dummy nozzle and the positioning assembly being mounted to the substrate, the substrate being provided with sound absorbing structures.
10. The microphone calibration detecting device of claim 9, wherein the positioning assembly includes a tooling bottom plate, the tooling bottom plate is connected to the substrate and covers a part of the sound absorbing structure, the mounting platform is disposed on the tooling bottom plate, the tooling bottom plate is provided with a hollow portion, and a part of the sound absorbing structure is exposed by the hollow portion.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011392028.6A CN112333620B (en) | 2020-12-02 | 2020-12-02 | Microphone calibration detection device |
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| CN202011392028.6A CN112333620B (en) | 2020-12-02 | 2020-12-02 | Microphone calibration detection device |
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| CN112333620A true CN112333620A (en) | 2021-02-05 |
| CN112333620B CN112333620B (en) | 2022-04-22 |
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| CN112333620B (en) | 2022-04-22 |
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