CN208509269U - Microphone sound source air-tightness testing device - Google Patents
Microphone sound source air-tightness testing device Download PDFInfo
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- CN208509269U CN208509269U CN201821110102.9U CN201821110102U CN208509269U CN 208509269 U CN208509269 U CN 208509269U CN 201821110102 U CN201821110102 U CN 201821110102U CN 208509269 U CN208509269 U CN 208509269U
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- fixing seat
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Abstract
The utility model belongs to test equipment technical field, more particularly to a kind of microphone sound source air-tightness testing device, product fixing seat including providing the shielded box of sealed environment for microphone to be measured and in shielded box and for placing microphone, product fixing seat is equipped with test mould group for be electrically connected and controlling microphone sounding with microphone, shielded box is interior and/or product fixing seat on be additionally provided with sound-source signal sound source receiver for receiving microphone sounding；Microphone sound source test device for air tightness further includes being electrically connected to test mould group and sound source receiver and the control cabinet that the sound source air-tightness of microphone is judged according to sound-source signal.The microphone sound source air-tightness testing device of the utility model, it can differentiate the hermetic seal of microphone sound source and automatically save test data and differentiate whether product is qualified, a series of quality problems are avoided, so that will not influence the speech quality of electronic equipment, to be realized with a low cost a wide range of production application.
Description
Technical field
The utility model belongs to test equipment technical field more particularly to a kind of microphone sound source air-tightness testing device.
Background technique
With the update of electronic product, electronic product increasingly ultrathin, the sounding of loudspeaker is frequent in electronic product
Noise is had, this aspect is the mass production due to loudspeaker, is on the other hand then not have systematic detection, it may be possible to because
For product mass production, quality level is caused to decline, but most of the reason is that not having systematic to MIC (audio parts) progress
Detection, causing microphone the main reason for noise occur includes the problem in production, the problem in assembling.Existing needle
Test to microphone sound source, can only detect the conventional func (size of volume) of microphone sound source, and cannot detect microphone
The air-tightness (microphone caused by the solder skip that occurs in assembling process, rosin joint not sounding, distorsion, leakage sound, noise) of sound source.For
Today of technology height development, it is clear that some fall behind and inconvenience.
Utility model content
The purpose of this utility model is to provide a kind of microphone sound source air-tightness testing devices, it is intended to solve the prior art
In can not to microphone carry out sound source air-leakage test the technical issues of.
In order to achieve the above purposes, the technical solution adopted by the utility model is:, and a kind of microphone sound source air tightness test is set
It is standby, including providing the shielded box of sealed environment for microphone to be measured and in the shielded box and for placing the microphone
Product fixing seat, the product fixing seat be equipped with for the microphone sounding to be electrically connected and controlled with the microphone
Mould group is tested, the sound source for receiving the microphone sounding is additionally provided in the shielded box and/or in the product fixing seat
Signal sound source receiver；The microphone sound source test device for air tightness further includes being electrically connected to the test mould group and the sound
Source receiver and the control cabinet that the sound source air-tightness of the microphone is judged according to the sound-source signal.
Preferably, the sound source receiver includes distorsion sound source receiver, and the distorsion sound source receiver is fixed on described
In product fixing seat.
Preferably, the sound source receiver includes leakage/noise sound source receiver, and the leakage/noise sound source receiver is fixed
In the top in the shielded box and positioned at the product fixing seat.
Preferably, the shielded box includes cabinet and front door, and side opening, the preceding door closure are offered on front side of the cabinet
At the side opening, it is fixed with driving end on the cabinet and is connect with the front door and is used to control the folding at the front door
Driving mechanism, the driving mechanism is electrically connected with the control cabinet.
Preferably, the inside at the front door is equipped with supporting plate, and the product fixing seat is installed on the supporting plate；It is described
Support base is equipped in cabinet, the support base is equipped with guide rail, slidably connect sliding block on the guide rail, the sliding block with it is described
The bottom of supporting plate is fixedly connected.
Preferably, the light sensing switch for incuding the position of the supporting plate, the light sensing switch are equipped in the cabinet
It is electrically connected with the control cabinet and is used to sense that the supporting plate to be moved to the signal of predeterminated position and feeds back to the control
Case.
Preferably, the driving mechanism includes cylinder, and the cylinder body of the cylinder is fixed on the bottom of the cabinet, the gas
The piston rod of cylinder extends towards the front side of the cabinet and is fixedly connected with the front door, and the cylinder and the control cabinet are electrical
Connection.
Preferably, the driving mechanism further includes guide post and guide sleeve, and the guide sleeve is fixed on the bottom of the cabinet
Portion, one end of the guide post is fixedly connected with the front door, the other end passes through the guide sleeve and guide sleeve sliding connects
It connects, and the guide post and the piston rod of the cylinder are arranged in parallel.
Preferably, the control cabinet is set to the lower section of the shielded box and is fixedly connected with the cabinet, and the control
The rear side of case is equipped with radiator.
Preferably, the automatic code reader of the information for acquiring the microphone, institute are additionally provided in the product fixing seat
It states automatic code reader and the control cabinet is electrically connected.
It is to be measured when work the utility model has the beneficial effects that the microphone sound source air-tightness testing device of the utility model
Microphone be fixed in product fixing seat, and microphone is electrically connected with the test mould group being arranged in product fixing seat and is led
It is logical, start sounding under the control of test mould group after microphone conducting, at this point, sound source receiver can receive microphone sending
Sound source, and sound-source signal is fed back into control cabinet, control cabinet receives the sound-source signal of sound source receiver feedback, and data receiver finishes
Control cabinet automatic identification sound-source signal afterwards, and differentiate whether the sound source air-tightness of microphone is good, it so realizes and judges microphone
It is whether qualified.The microphone sound source air-tightness testing device of the utility model can differentiate microphone sound source hermetic seal and automatic
It saves test data and differentiates whether product is qualified, a series of quality problems is avoided, so that will not influence electronic equipment
Speech quality, to be realized with a low cost a wide range of production application；Meanwhile overall structure is simple, easy to use, technical maturity is easy to
It realizes, at low cost and practical, automatic running can more improve the scientific and technological added value of product.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new
Some embodiments of type for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of microphone frequency sound test equipment provided by the embodiment of the utility model.
Fig. 2 is that microphone frequency sound test equipment provided by the embodiment of the utility model hides the structure after control cabinet and top cover
Schematic diagram.
Fig. 3 is that microphone frequency sound test equipment provided by the embodiment of the utility model hides the structural representation after control cabinet
Figure.
Wherein, each appended drawing reference in figure:
10-shielded box 11-cabinet, 12-top covers
13-front door 14-support base, 15-guide rails
16-20-product of light sensing switch fixing seat, 30-test mould groups
40-42-leakages of sound source receiver 41-distorsion sound source receiver/noise sound source receiver
50-control cabinet 60-driving mechanism, 61-cylinders
62-guide post 63-guide sleeve, 70-radiators
80-display screen 90-automatic code reader, 100-microphones
111-top opening 112-side opening, 121-air-legs
122-holder-on 131-supporting plates of hand.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining the description of attached drawing 1~3 is exemplary, it is intended to for explaining the utility model, and should not be understood as practical to this
Novel limitation.
In the description of the present invention, it should be understood that term " length ", " width ", "upper", "lower", " preceding ",
The orientation or positional relationship of the instructions such as " rear ", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is based on attached
Orientation or positional relationship shown in figure, is merely for convenience of describing the present invention and simplifying the description, rather than indication or suggestion
Signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this
The limitation of utility model.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention,
More than, unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
As shown in Figures 1 to 3, a kind of microphone sound source air-tightness testing device provided by the embodiment of the utility model, including
The shielded box 10 of sealed environment is provided for microphone 100 to be measured and in the shielded box 10 and for placing the microphone
Shape can be set in product fixing seat 20 with the slot being adapted to for accommodating fixed microphone for 100 product fixing seat 20
100, or setting fixture is for gripping microphone 100.
Wherein, the effect of shielded box 10 can provide the environment of a sealing for microphone 100, it is ensured that be directed to microphone
100 test will not be distorted.
100 specific structure of microphone in the present embodiment can be one piece of softpanel structure.
Further, the product fixing seat 20 is equipped with for being electrically connected with the microphone 100 and controlling the wheat
The test mould group 30 of gram 100 sounding of wind is additionally provided in the shielded box 10 and/or in the product fixing seat 20 for receiving
The sound-source signal sound source receiver 40 of 100 sounding of microphone；The 100 sound source test device for air tightness of microphone also wraps
It includes and is electrically connected to the test mould group 30 and the sound source receiver 40 and according to the sound-source signal to judge the microphone
The control cabinet 50 of 100 sound source air-tightness.
Control cabinet 50 is preferably the terminal that computer or PLC etc. are integrated with processing center, wherein can be in computer
Setting relevant software, perhaps program controls sound source receiver 40 and test mould group 30 by the software or program of the setting
Work, and the relational graph for receiving the sound-source signal of 100 sounding of microphone can be formulated automatically by the software or program, and
Show whether microphone 100 occurs distorsion, leakage sound or noise finally judge whether the microphone 100 is qualified products.
The microphone sound source air-tightness testing device of the utility model embodiment, when work, microphone 100 to be measured is solid
It is scheduled in product fixing seat 20, and microphone 100 is electrically connected conducting with the test mould group 30 being arranged in product fixing seat 20,
Microphone 100 starts sounding under the control of test mould group 30 after being connected, at this point, sound source receiver 40 can receive microphone
100 sound sources issued, and sound-source signal is fed back into control cabinet 50, control cabinet 50 receives the sound source letter that sound source receiver 40 is fed back
Number, 50 automatic identification sound-source signal of control cabinet after data receiver, and differentiate whether the sound source air-tightness of microphone 100 is good
It is good, so realize judge whether microphone 100 is qualified.
The microphone sound source air-tightness testing device of the utility model embodiment can differentiate that 100 sound source of microphone is airtight
It seals and automatically saves test data and differentiate whether product is qualified, a series of quality problems is avoided, so that will not influence electricity
The speech quality of sub- equipment, to be realized with a low cost a wide range of production application；Meanwhile overall structure is simple, it is easy to use, technique at
It is ripe, it is easy to accomplish, at low cost and practical, automatic running can more improve the scientific and technological added value of product.
Control cabinet 50 can setting position according to actual needs, such as can connect in the bottom or side of shielded box 10
Deng, or make control cabinet 50 and shielded box 10 separately positioned.
Further, as shown in Figure 1, the 100 frequency sound test equipment of microphone of the utility model embodiment further includes display
Screen 80, display screen 80 are electrically connected with control cabinet 50 and for showing data.Preferably, display screen 80 is touch display screen
80, control control cabinet 50 can also be so operated on display screen 80.
In the present embodiment, as shown in figures 2-3, the sound source receiver 40 includes distorsion sound source receiver 41, the distorsion
Sound source receiver 41 is fixed in the product fixing seat 20.Specifically, distorsion sound source receiver 41 receives microphone 100 and issues
Sound-source signal after may determine that the microphone 100 issue sound source whether be distorsion.
In the present embodiment, as shown in Fig. 2, the sound source receiver 40 includes leakage/noise sound source receiver 42, the leakage/
Noise sound source receiver 42 is fixed in the shielded box 10 and is located at the top of the product fixing seat 20.Specifically, leak/miscellaneous
Speech source receiver 42 receives the sound source that may determine that the microphone 100 issues after the sound-source signal that microphone 100 issues
No is leakage sound or noise.
Sound source receiver 40 i.e. in the present embodiment may include that distorsion sound source receiver 41 and/or leakage/noise sound source connect
Receive device 42.
In the present embodiment, as shown in Figures 1 to 3, the shielded box 10 includes cabinet 11 and top cover 12, the top of the cabinet 11
Portion is equipped with top opening 111, the shape of top cover 12 and the shape adaptation of top opening 111, and the top cover 12 is covered on the top opening
At 111 and one end and the cabinet 11 are hinged, and the lid of top cover 12, which is located at top opening 111, can make cabinet 11 be in closed
State, the side of the cabinet 11 are equipped with the air-leg 121 for connecting with the top cover 12 and be used to control the folding of the top cover 12.
Specifically, air-leg 121 can strut top cover 12 by air pressure, and such staff can to push up after opening top cover 12
Lid 12 is in a certain state and closes at top opening 111 without automatic cover, and the top cover 12 after opening is avoided to interfere with work people
The operation of member.Preferably, air-leg 121 is two, and is connected to the opposite sides of top cover 12.
Further, holder-on hand 122 is provided on top cover 12, holder-on hand 122 is held for staff, in order to control top
The opening and closing of lid 12.
In the present embodiment, as shown in Figures 1 to 3, the shielded box 10 further includes front door 13, and the front side of the cabinet 11 is opened
Equipped with side opening 112, the area at front door 13 is greater than the area of side opening 112, and the front door 13 is covered on the side opening 112
Place, and the bottom end of front extend to side opening 112 lower section until cabinet 11 lower section, in this way, so that front door 13 can be with
Driving mechanism 60 connects, and driving end is fixed on the cabinet 11 and is connect with the front door 13 and for controlling the front door 13
The driving mechanism 60 of folding, the driving mechanism 60 are electrically connected with the control cabinet 50.Driving mechanism 60 can be linear mould group
Etc. can control the component for driving end to connect with it along the mechanism of linear motion, it is electrically connected with control cabinet 50, and controlling
The lid of front door 13 is controlled under the control of case 50 to be located at side opening 112, or the front door 13 that lid is located at side opening 112 is opened, with
This facilitates staff to operate.
In the present embodiment, as shown in Figures 1 to 3, the inside at the front door 13 is equipped with supporting plate 131, the product fixing seat
20 are installed on the supporting plate 131.Specifically, the setting of supporting plate 131 be for for product fixing seat 20 install and support,
The folding at front door 13 can drive product fixing seat 20 outer or in moving outside cabinet 11 in being moved to cabinet 11 in cabinet 11 in this way
Enter to cabinet 11, in this way when product fixing seat 20 in be moved in cabinet 11 cabinet 11 it is outer when, will be to be measured then easily facilitating
Microphone 100 be fixed in product fixing seat 20, operation is more convenient.
In the present embodiment, as shown in Fig. 2, being equipped with the light for incuding the position of the supporting plate 131 in the cabinet 11
Feel switch 16, the light sensing switch 16 is electrically connected with the control cabinet 50 and for that will sense that the supporting plate 131 is moved to
The signal of predeterminated position feeds back to the control cabinet 50.Specifically, light sensing switch 16 senses that supporting plate 131 is moved to setting
Behind position, then feeds back front door 13 and cover the signal for setting side opening 112 completely to control cabinet 50, such control cabinet 50 can be operated down
One step work, then it is possible to prevente effectively from there is the phenomenon that maloperation because front door 13 is not turned off, it is ensured that test job can
It leans on and stablizes.
In the present embodiment, as shown in Fig. 2, being equipped with support base 14 in the cabinet 11, the support base 14 is equipped with guide rail
15, sliding block (not shown) is slidably connected on the guide rail 15, and the sliding block is fixedly connected with the bottom of the supporting plate 131.
Specifically, guide rail 15 and then ensures that product is solid with the cooperation of sliding block for ensuring that supporting plate 131 is moved along certain direction
There are not path deviations when mobile with supporting plate 131 in reservation 20.
In the present embodiment, as shown in Figures 1 to 3, the driving mechanism 60 includes cylinder 61, and the cylinder body of the cylinder 61 is solid
Due to the bottom of the cabinet 11, the piston rod of the cylinder 61 extend towards the front side of the cabinet 11 and with the front door 13
It is fixedly connected, the cylinder 61 is electrically connected with the control cabinet 50.Specifically, 61 movement velocity of cylinder is fast, can be quickly anti-
The folding at front door 13 should be controlled, so that operating efficiency is promoted.
In the present embodiment, as shown in figure 3, the driving mechanism 60 further includes guide post 62 and guide sleeve 63, the guiding
Set 63 is fixed on the bottom of the cabinet 11, and one end of the guide post 62 is fixedly connected with the front door 13, the other end passes through
The guide sleeve 63 is slidably connected with the guide sleeve 63, and the guide post 62 is parallel with the piston rod of the cylinder 61 sets
It sets.The cooperation of guide post 62 and guide sleeve is similar with the mating reaction of sliding block with guide rail 15, and effect is to ensure that the movement at front door 13
It needs to run along the route of setting, front door 13 is avoided to deviate in moving process, and then ensure that the lid of front door 13 is located at side opening
Leakproofness at 112 is good.
Preferably, as shown in figure 3, the two sides of cylinder 61 are arranged in the mating connection of guide post 62 and guide sleeve 63.
In the present embodiment, as shown in Figure 1, the control cabinet 50 be set to the shielded box 10 lower section and with the cabinet 11
It is fixedly connected, and the rear side of the control cabinet 50 is equipped with radiator 70.Radiator 70 includes fan, passes through air-cooled mode pair
Control cabinet 50 cools down, and reduces the damage of equipment at high temperature, and provides be more good environment and carry out test experiments.
In the present embodiment, as shown in Fig. 2, being additionally provided in the product fixing seat 20 for acquiring the microphone 100
The automatic code reader 90 of information, the automatic code reader 90 are electrically connected with the control cabinet 50.Specifically, automatic code reader 90
Effect be to record the number or model of each microphone 100 to be tested, and the information is fed back in control cabinet 50,
Control cabinet 50 re-records the data of the model of each microphone 100 for completing test.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (10)
1. a kind of microphone sound source air-tightness testing device, it is characterised in that: including providing sealed environment for microphone to be measured
Shielded box and in the shielded box and for placing the product fixing seat of the microphone, the product fixing seat is equipped with
For being electrically connected and controlling the test mould group of the microphone sounding with the microphone, in the shielded box and/or the production
The sound-source signal sound source receiver for receiving the microphone sounding is additionally provided in product fixing seat；The microphone sound source is airtight
System safety testing device further includes being electrically connected to the test mould group and the sound source receiver and according to the sound-source signal to judge
The control cabinet of the sound source air-tightness of the microphone.
2. microphone sound source air-tightness testing device according to claim 1, it is characterised in that: the sound source receiver packet
Distorsion sound source receiver is included, the distorsion sound source receiver is fixed in the product fixing seat.
3. microphone sound source air-tightness testing device according to claim 1 or 2, it is characterised in that: the sound source receives
Device includes leakage/noise sound source receiver, and the leakage/noise sound source receiver is fixed in the shielded box and is located at the product
The top of fixing seat.
4. microphone sound source air-tightness testing device according to claim 1, it is characterised in that: the shielded box includes case
Body and front door offer side opening on front side of the cabinet, and the front door is covered at the side opening, fixed on the cabinet
There is driving end to connect and be used to control the driving mechanism of the folding at the front door, the driving mechanism and the control with the front door
Case electrical connection processed.
5. microphone sound source air-tightness testing device according to claim 4, it is characterised in that: set on the inside of the front door
There is supporting plate, the product fixing seat is installed on the supporting plate；It is equipped with support base in the cabinet, is set on the support base
There is guide rail, sliding block is slidably connected on the guide rail, the sliding block is fixedly connected with the bottom of the supporting plate.
6. microphone sound source air-tightness testing device according to claim 5, it is characterised in that: be equipped with and use in the cabinet
Light sensing switch in the position for incuding the supporting plate, the light sensing switch are electrically connected with the control cabinet and are used to sense
The signal that the supporting plate is moved to predeterminated position feeds back to the control cabinet.
7. microphone sound source air-tightness testing device according to claim 4, it is characterised in that: the driving mechanism includes
Cylinder, the cylinder body of the cylinder are fixed on the bottom of the cabinet, and the piston rod of the cylinder is towards prolonging on front side of the cabinet
It stretches and is fixedly connected with the front door, the cylinder and the control cabinet are electrically connected.
8. microphone sound source air-tightness testing device according to claim 7, it is characterised in that: the driving mechanism is also wrapped
Guide post and guide sleeve are included, the guide sleeve is fixed on the bottom of the cabinet, and one end of the guide post and the front door are solid
Fixed connection, the other end pass through the guide sleeve and are slidably connected with the guide sleeve, and the piston of the guide post and the cylinder
Bar is arranged in parallel.
9. according to the described in any item microphone sound source air-tightness testing devices of claim 4~8, it is characterised in that: the control
Case processed is set to the lower section of the shielded box and is fixedly connected with the cabinet, and the rear side of the control cabinet is equipped with radiator.
10. microphone sound source air-tightness testing device according to claim 1 or 2, it is characterised in that: the product is fixed
The automatic code reader of the information for acquiring the microphone is additionally provided on seat, the automatic code reader and the control cabinet are electrical
Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821110102.9U CN208509269U (en) | 2018-07-12 | 2018-07-12 | Microphone sound source air-tightness testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821110102.9U CN208509269U (en) | 2018-07-12 | 2018-07-12 | Microphone sound source air-tightness testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208509269U true CN208509269U (en) | 2019-02-15 |
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ID=65284627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201821110102.9U Active CN208509269U (en) | 2018-07-12 | 2018-07-12 | Microphone sound source air-tightness testing device |
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| CN (1) | CN208509269U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110087176A (en) * | 2019-05-22 | 2019-08-02 | 格云特自动化科技（深圳）有限公司 | Microphone multiband clock frequency response detection device |
| CN110290452A (en) * | 2019-05-17 | 2019-09-27 | 深圳康佳电子科技有限公司 | A kind of intelligent television end microphone mould group acoustical testing shielded box |
| CN110996241A (en) * | 2019-12-12 | 2020-04-10 | 苏州市运泰利自动化设备有限公司 | Microphone testing device |
| CN112423214A (en) * | 2020-11-03 | 2021-02-26 | 杭州菲仁科技有限公司 | Microphone sound intensity quality detection device with energy-saving and environment-friendly functions |
-
2018
- 2018-07-12 CN CN201821110102.9U patent/CN208509269U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110290452A (en) * | 2019-05-17 | 2019-09-27 | 深圳康佳电子科技有限公司 | A kind of intelligent television end microphone mould group acoustical testing shielded box |
| CN110290452B (en) * | 2019-05-17 | 2021-04-27 | 深圳康佳电子科技有限公司 | Acoustic test shielding box for microphone module at intelligent television end |
| CN110087176A (en) * | 2019-05-22 | 2019-08-02 | 格云特自动化科技（深圳）有限公司 | Microphone multiband clock frequency response detection device |
| CN110996241A (en) * | 2019-12-12 | 2020-04-10 | 苏州市运泰利自动化设备有限公司 | Microphone testing device |
| CN112423214A (en) * | 2020-11-03 | 2021-02-26 | 杭州菲仁科技有限公司 | Microphone sound intensity quality detection device with energy-saving and environment-friendly functions |
| CN112423214B (en) * | 2020-11-03 | 2021-08-27 | 杭州菲仁科技有限公司 | Microphone sound intensity quality detection device with energy-saving and environment-friendly functions |
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