CN114466299A - Air tightness and insufficient solder joint detection method for multiple groups of microphones - Google Patents
Air tightness and insufficient solder joint detection method for multiple groups of microphones Download PDFInfo
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- CN114466299A CN114466299A CN202011245807.3A CN202011245807A CN114466299A CN 114466299 A CN114466299 A CN 114466299A CN 202011245807 A CN202011245807 A CN 202011245807A CN 114466299 A CN114466299 A CN 114466299A
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- 229910000679 solder Inorganic materials 0.000 title abstract description 6
- 238000001514 detection method Methods 0.000 title description 9
- 238000012360 testing method Methods 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 34
- 230000005236 sound signal Effects 0.000 claims abstract description 6
- 230000004913 activation Effects 0.000 claims description 2
- 230000009849 deactivation Effects 0.000 claims description 2
- 238000005476 soldering Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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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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- Examining Or Testing Airtightness (AREA)
Abstract
The invention provides a method for detecting air tightness and insufficient soldering of a plurality of groups of microphones, which comprises the following steps: s1, connecting the computer with the tested product by using a wireless network or a USB serial port for controlling the test and displaying the result; s2, plugging the microphone sound pick-up hole before starting the test, selecting an internal or external loudspeaker as a sound source, and selecting the number of microphones of the tested product; s3, starting testing, and starting recording and saving the recording file for the tested product; s4, calculating the average energy value of the audio signals of each microphone channel after the recording is finished; s5, comparing whether the microphone energy value exceeds the limit value and whether the same group microphone energy value is the same; and S6, returning the result to the computer for display. The method is simple to operate, the microphone air tightness and the insufficient solder abnormity can be detected only by analyzing the audio energy value of each microphone in the recording file, and the cost is saved.
Description
Technical Field
The invention relates to the technical field of audio frequency, in particular to a method for detecting air tightness and insufficient soldering of multiple groups of microphones.
Background
With the development of Artificial Intelligence (AI) and internet of things (IoT) technologies, voice interaction functionality is widely used in many areas of intelligent networking.
At present, a group of (two microphones) or a plurality of groups of microphones are equipped on an intelligent terminal according to different voice noise reduction technologies, and the voice recognition accuracy can be reduced when a certain group of microphones work abnormally, so that the user experience is reduced. It is found that the abnormality of voice data collected by the microphone is usually caused by the blockage of a pickup hole or the insufficient soldering phenomenon of the microphone.
In order to find out the problems, an air tightness test is added in the product detection process, the general detection method is to enter a tested product into an engineering detection mode, seal a microphone sound pickup hole and then place the microphone sound pickup hole into a mute box, control an internal loudspeaker of the mute box to play an audio signal by an external computer, and test the air tightness of each microphone in sequence according to whether the audio energy value received by the tested microphone is greater than a preset value or not. The existing testing method is too complicated to operate when a plurality of groups of microphones are tested, and the testing cost is increased due to low efficiency.
The drawbacks of the prior art include:
1. the microphone air tightness detection is performed by taking the external loudspeaker as a generating source, only the sealing effect of the sound pickup hole can be detected, and the tightness of the sound pickup structure cannot be detected, for example, crosstalk to a microphone when the internal loudspeaker is generated.
2. The efficiency of testing each microphone is low in the process of detecting the air tightness of the microphones respectively, and due to the technical reason of sound pickup, audio compensation may exist among the microphones in the same group, so that the detection is misaligned.
3. The detection of the microphone cold joint can not be carried out in the stage from production to finished products, and a professional instrument is needed to detect the PCB.
Technical terms commonly used in the prior art include:
a sound pickup hole: the built-in microphone is required to be provided with a hole on the equipment shell to guide external sound into the hole for the purpose of receiving sound.
Audio energy: it is understood that the power of the audio, the more power the louder.
Audio compensation: suppose two microphones in the same group, one collects right channel data and the other collects left channel data, but when the right channel microphone collects audio data abnormally, software copies the left channel audio data to the right channel for compensation output, thereby avoiding the occurrence of right channel noise or silence. PCB board: and (4) an internal circuit board of the product.
Disclosure of Invention
In order to solve the problems in the prior art, the present invention aims to:
1. a built-in loudspeaker can be selected as a sound emitting source, and the influence of the structural design of the product on the sealing performance of the microphone can be checked.
2. And sealing all the microphones during the air tightness test, and comparing whether the audio energy value of each microphone is greater than a limit value.
3. Whether the microphones have cold solder joint conditions can be judged by comparing whether the audio energy values of the microphones in the same group are the same.
Specifically, the invention provides a method for detecting air tightness and cold joint of multiple groups of microphones, which comprises the following steps:
s1, connecting the computer with the tested product by using a wireless network or a USB serial port for controlling the test and displaying the result;
s2, plugging a microphone sound pickup hole before starting testing, selecting an internal or external loudspeaker as a sound source, and selecting the number of microphones of a tested product;
s3, starting testing, and starting recording and saving the recording file for the tested product;
s4, calculating the average energy value of the audio signals of each microphone channel after the recording is finished;
s5, comparing whether the microphone energy value exceeds the limit value and whether the same group of microphones have the same energy value;
and S6, returning the result to the computer for display.
In S1, the working steps of the computer-side test tool further include:
s1.1, configuring a built-in loudspeaker as a sound source at a computer end;
s1.2, configuring the pronunciation frequency and the volume;
s1.3, configuring a highest average energy limit value.
In S2, the working steps of the device to be tested at the sound muffling box end further include:
s2.1, entering an engineering mode;
s2.2, plugging all microphones;
and S2.3, placing the loudspeaker in a mute box.
In S3, the method further includes: click the "start test" button.
In S6, the method further includes: and displaying the test result.
The method may use an Audacity tool to view the sound recording file.
The method controls the activation and deactivation of the microphone of the test product via a wireless connection.
The sound attenuation box is characterized in that a product positioning tool and a sound generating device are arranged in the sound attenuation box, and the product positioning tool is configured to fix a test product at a position corresponding to the sound generating device.
The method can be performed by using a mute box or in a mute room.
In summary, the method of the present application can achieve the following advantages: the method is simple to operate, the microphone air tightness and the insufficient solder abnormity can be detected only by analyzing the audio energy value of each microphone in the recording file, and the cost is saved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention.
FIG. 1 is a schematic block diagram of the process of the speaker under test device and the computer-side test tool in the method of the present invention.
FIG. 2 is a schematic view of an Audacity tool used by a computer to view a sound recording file generated by testing according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of a computer-side testing tool displaying a testing result according to an embodiment of the present invention.
Fig. 4 is a flow chart of a method of the present invention.
Detailed Description
In order that the technical contents and advantages of the present invention can be more clearly understood, the present invention will now be described in further detail with reference to the accompanying drawings.
As shown in fig. 4, a method for multi-microphone hermeticity and cold solder joint detection, the method comprising the steps of:
s1, connecting the computer with the tested product by using a wireless network or a USB serial port for controlling the test and displaying the result;
s2, plugging a microphone sound pickup hole before starting testing, selecting an internal or external loudspeaker as a sound source, and selecting the number of microphones of a tested product;
s3, starting testing, and starting recording and saving the recording file for the tested product;
s4, calculating the average energy value of the audio signals of each microphone channel after the recording is finished;
s5, comparing whether the microphone energy value exceeds the limit value and whether the same group of microphones have the same energy value;
and S6, returning the result to the computer for display.
As shown in fig. 1, in S1, the step of operating the computer-side test tool further includes:
a built-in loudspeaker is configured at the computer end as a sound source;
configuring the pronunciation frequency and the volume;
the highest average energy limit is configured.
In S2, the working steps of the device to be tested at the sound muffling box end further include:
entering an engineering mode;
plugging all microphones;
putting into a mute box.
In S3, the method further includes: click the "start test" button.
In S6, the method further includes: and displaying the test result.
The number of the tested product microphones is selected because the number of different product microphones is different, so 2/4/8 channel number options can be given on the tool interface; the parameters are transmitted to a microphone test program module, and corresponding number of audio channel data are obtained.
The microphone energy value is stored at the computer end, the limited value is defaulted to 50dBm, and the limited value can be modified according to the actual situation; and transmitting a test program module in each product through usb or wifi before testing, and calculating the access capability value of each microphone by the test program module to judge whether the result is smaller than a limited threshold value. Wherein, the energy value algorithm is as follows: the average energy of N (16384) sample points x (N) is tested,
as shown in fig. 2, the method may use an audicity tool to view the audio file, and the computer-side tool interface displays the energy value of each microphone path and the test result.
The same set of microphones can be of the same magnitude and is almost impossible under normal conditions of microphone access. The same energy value generally occurs because when one microphone path in the same group does not normally acquire data, the same group of normal microphone data is copied to the abnormal microphone path in the audio driver in order not to affect the audio quality, and the same group of microphone data is identical, so the same energy value is also the same. Therefore, a determination result is obtained:
1) the same energy value indicates that the microphone channel is abnormal;
2) the smaller the energy value, the better the sealability.
Specifically, the embodiment of the invention provides a method for detecting air tightness and cold joint of multiple groups of microphones. The test may be performed using a mute box or in a mute room. A computer is connected with a tested product by using a wireless network or a USB serial port and is used for controlling the test and displaying the result. As shown in fig. 2, the recording file, the first microphone audio data, the second microphone audio data, the third microphone audio data, the fourth microphone audio data, and the reference audio source data are viewed using the audicity tool. Before the test is started, the microphone sound pick-up hole is blocked, an internal or external loudspeaker is selected as a generating source, and the number of microphones of a tested product is selected. And starting the test, starting recording the sound of the tested product, storing the recording file, and calculating the average energy value of the audio signals of each microphone channel after the recording is finished. By comparing whether the microphone energy value exceeds the limit value and whether the same group of microphones have the same energy value, the result is returned to the computer for display, as shown in fig. 3, corresponding to the data feedback result of fig. 2. Wherein the data for all 4 microphone channels in fig. 2 that are less than the defined threshold are all 50 dBm.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A method for detecting air tightness and cold joint of multiple microphones, comprising the steps of:
s1, connecting the computer with the tested product by wireless network or USB serial port for controlling the test and displaying the result;
s2, plugging a microphone sound pickup hole before starting testing, selecting an internal or external loudspeaker as a sound source, and selecting the number of microphones of a tested product;
s3, starting testing, and starting recording and saving the recording file for the tested product;
s4, calculating the average energy value of the audio signals of each microphone channel after the recording is finished;
s5, comparing whether the microphone energy value exceeds the limit value and whether the same group of microphones have the same energy value;
and S6, returning the result to the computer for display.
2. The method of claim 1, wherein the step of operating the computer-based test tool at S1 further comprises:
s1.1, configuring a built-in loudspeaker as a sound source at a computer end;
s1.2, configuring the pronunciation frequency and the volume;
s1.3, configuring a highest average energy limit value.
3. The method of claim 1, wherein in step S2, the step of operating the tested device at the sound muffling box end further comprises:
s2.1, entering an engineering mode;
s2.2, plugging all microphones;
and S2.3, placing the loudspeaker into a silent sound box.
4. The method for detecting airtightness and cold joint of multiple microphones as claimed in claim 1, wherein in said S3, further comprising: click the "start test" button.
5. The method for detecting airtightness and cold joint of multiple microphones as claimed in claim 1, wherein in said S6, further comprising: and displaying the test result.
6. The method of claim 1, wherein the method allows viewing of the audio file using an Audacity tool.
7. The method of claim 1, wherein the method controls activation and deactivation of microphones of a test product via a wireless connection.
8. The method of claim 1, wherein a product positioning fixture and a sound generating device are disposed inside the sound muffling box, and the product positioning fixture is configured to fix the test product at a position corresponding to the sound generating device.
9. The method of claim 1, wherein the method is performed by using a mute box or in a mute room.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011245807.3A CN114466299A (en) | 2020-11-10 | 2020-11-10 | Air tightness and insufficient solder joint detection method for multiple groups of microphones |
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| CN202011245807.3A CN114466299A (en) | 2020-11-10 | 2020-11-10 | Air tightness and insufficient solder joint detection method for multiple groups of microphones |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115914973A (en) * | 2023-02-10 | 2023-04-04 | 浙江华创视讯科技有限公司 | Microphone sound channel detection method and device, computer equipment and storage medium |
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2020
- 2020-11-10 CN CN202011245807.3A patent/CN114466299A/en active Pending
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