CN213186560U - Audio test system - Google Patents
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- CN213186560U CN213186560U CN202022053577.2U CN202022053577U CN213186560U CN 213186560 U CN213186560 U CN 213186560U CN 202022053577 U CN202022053577 U CN 202022053577U CN 213186560 U CN213186560 U CN 213186560U
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Abstract
The utility model relates to an audio test technical field provides an audio test system, including the mobile terminal who has microphone and earphone that awaits measuring and the audio test equipment who is connected with this mobile terminal, wherein, the earphone is used for vibrating the broadcast with the first test audio signal that this mobile terminal (earphone based on bone vibration transmission) received, and mobile terminal generates second test audio signal and exports it to audio test equipment according to the test sound wave that this microphone received; and the audio test equipment can test the audio channel of the mobile terminal according to the received first test audio signal and the second test audio signal. Therefore, the interference of environmental noise in the system to audio signal transmission can be effectively avoided, the production quality of the mobile terminal is effectively judged, and the accuracy of audio detection is improved.
Description
Technical Field
The utility model relates to an audio test technical field, concretely relates to audio test system for mobile terminal.
Background
Nowadays, mobile terminals have become a necessity in people's daily life. In the mass production of modern mobile terminals, in order to ensure the audio performance of products, audio testing is a necessary link in production testing. Among them, the main test object of audio testing in mass production of mobile terminals is production quality. The audio test comprises detecting the quality of a patch of the mainboard and detecting the assembly quality of each part.
The traditional method for mass production of audio test by mobile terminals comprises the following four steps:
(1) and (4) carrying out artificial subjective test on the terminal voice loop. And simulating a user using channel through terminal software. This test method has the disadvantage of poor accuracy and stability. Since the human test is a subjective judgment, and the judgment itself has no fixed standard, the standard of the test may vary from person to person. Furthermore, the stability of the artificial test is poor, the fatigue caused by long-time mechanical action and the instability of the test can be caused by the alternation of workers who change shifts.
(2) And testing a voice path in a signaling call mode. The signaling call is established through the terminal comprehensive tester, the conversation under the real network is simulated, and the audio test is realized through the audio generator and the audio analyzer. The disadvantage of this test method is that there are many test instruments and the test path is complicated, resulting in longer test time and higher test cost.
(3) And carrying out recording or playback test on the terminal audio channel. And independent recording or playback of each audio channel is realized through terminal software, and automatic audio testing is realized through audio testing equipment. The disadvantage of this test method is that the number of paths is multiplied by splitting the paths, which increases the test cost and makes real-time testing impossible.
The conventional mobile terminal, such as a conventional Micro Electro Mechanical System (MEMS) microphone, for example, for earphone voice transmission, a person speaks, and voice is transmitted to the MEMS microphone through air to be converted into digital or analog signals, which are then input to a next-stage system for sampling, analyzing and transmitting, thereby completing the whole voice transmission process.
In this process, other noises around the speaker, such as whistling sounds, smiling sounds of other people, wind sounds and other environmental noises are introduced into the MEMS microphone through the air, which may cause relatively large interference to the sound quality and speech recognition.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an audio test system can effectively judge mobile terminal's production quality, improves the degree of accuracy that the audio frequency detected.
According to the utility model provides a pair of audio test system, including the mobile terminal that awaits measuring and the audio test equipment who is connected with this mobile terminal, wherein, this mobile terminal has microphone and earphone, and this earphone is used for carrying out the vibration broadcast with the first test audio signal that this mobile terminal received, and this microphone is used for receiving the test sound wave, and this mobile terminal generates second test audio signal and exports aforementioned audio test equipment according to this test sound wave;
the audio test equipment is provided with a first input end connected with the first test audio signal and a second input end connected with the second test audio signal, and is used for testing the audio channel of the mobile terminal according to the received first test audio signal and the second test audio signal.
Preferably, the aforementioned audio test system further comprises:
and the vibration sensor is respectively connected with the receiver of the mobile terminal and the first input end of the audio test equipment and is used for acquiring vibration signals at the receiver of the mobile terminal and transmitting the vibration signals to the audio test equipment.
Preferably, the aforementioned audio test system further comprises:
and the vibration sensor is respectively connected with the receiver of the mobile terminal and the chip main board of the mobile terminal and is used for collecting vibration signals at the receiver of the mobile terminal and transmitting the vibration signals to the chip main board.
Preferably, the mobile terminal is a wired headset or a bluetooth headset based on bone vibration transmission.
Preferably, the audio test apparatus further comprises a radio frequency transmission module for transmitting the first test audio signal and the second test audio signal.
Preferably, the aforementioned audio test apparatus further comprises:
and the processing unit is provided with audio test software, and the audio test software is used for respectively processing the frequency domain parameters of the first test audio signal and the second test audio signal and judging the test result of the audio channel of the mobile terminal according to the frequency domain parameters.
Preferably, the processing unit is any one selected from a central processing unit, a microcontroller and a data processing chip.
Preferably, the frequency domain parameters are characteristic of parameters of the response at the cochlea of the human ear, including frequency response curve, distortion curve, resonant frequency and sensitivity.
Preferably, the test sound wave received by the microphone of the mobile terminal includes current environmental noise and/or human voice emitted by a test person within a certain distance.
Preferably, the aforementioned audio test apparatus further comprises:
the test microphone is used for receiving the test sound wave and processing the test sound wave into an audio signal with a certain frequency by the audio test equipment.
Preferably, the audio path of the mobile terminal includes an audio input path to which the microphone is connected and an audio output path to which the earpiece is connected.
The utility model has the advantages that: the utility model provides an audio test system, including the mobile terminal that awaits measuring and the audio test equipment who is connected with this mobile terminal, wherein, this mobile terminal has microphone and earphone, and this earphone is used for vibrating the broadcast with the first test audio signal that this mobile terminal (the earphone based on bone vibration transmission) received, and this microphone is used for receiving the test sound wave, and this mobile terminal generates second test audio signal and exports it to aforementioned audio test equipment according to this test sound wave; the audio test equipment is provided with a first input end connected with the first test audio signal and a second input end connected with the second test audio signal, and is used for testing an audio channel of the mobile terminal according to the received first test audio signal and the second test audio signal, wherein the audio channel comprises an audio input channel connected with the microphone and an audio output channel connected with a receiver. The utility model provides an environmental noise is to audio signal transmission's interference in the avoidance system that audio frequency test system can be fine, can effectively judge the production quality of mobile terminal (the earphone based on bone vibration transmission), improves the degree of accuracy that the audio frequency detected.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 shows a schematic block diagram of an audio testing system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a transmission path of an audio signal in a bone conduction manner according to an embodiment of the present invention compared with a conventional air conduction manner;
fig. 3 is a flowchart illustrating the operation of the audio testing system according to the embodiment of the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
According to the related art, for a conventional mobile terminal based on air vibration transmission (air conduction), such as a conventional Micro Electro Mechanical System (MEMS) microphone headset, voice transmission is performed by a human speaking, and voice is transmitted to the MEMS microphone through air and converted into a digital signal quantity or an analog signal quantity, and then input to a next-stage system for sampling analysis and transmission, so as to complete the whole voice transmission process. However, the propagation of sound in air is easily affected by the environment, the energy of the sound is greatly attenuated, resulting in a great change in timbre, and when the sound reaches the human ear, the sound also passes through the external auditory canal, the middle auditory canal, and reaches the internal auditory canal, and then the sound signal from the middle ear is converted into a corresponding nerve electrical signal through the tympanic membrane and the cochlea, and is delivered to the central system of the auditory nerve of the brain for further processing, as shown in fig. 2, other noises existing around the process also affect the energy and timbre effect of the sound, and also greatly interfere the sound quality and speech recognition in audio tests.
Compared with the air conduction, the mobile terminal (bluetooth headset) based on bone vibration transmission (bone conduction) has the advantages that the sound transmitted through the skull directly reaches the inner ear canal through the bone between the throat and the ear, and the attenuation and change of the energy and the tone of the sound are relatively small naturally, as shown in fig. 2. On the other hand, the earphone is fashionable and beautiful, can overcome the defects of the conventional in-ear type earphone and the conventional head-wearing type earphone, and has stronger openness. However, there are still many problems in testing bone conduction earphones in actual production, and currently, there is no corresponding device to test bone conduction earphones temporarily, so that the production quality of bone conduction earphones cannot be guaranteed.
Based on this, the embodiment of the utility model provides an audio test system for mobile terminal (based on bone vibration transmission's bluetooth headset), its can be fine avoid among the system ambient noise to audio signal transmission's interference, can effectively judge mobile terminal's (based on bone vibration transmission's bluetooth headset's) production quality simultaneously, improve the degree of accuracy that the audio frequency detected.
The present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 shows a schematic block diagram of an audio testing system according to an embodiment of the present invention.
Referring to fig. 1, the present invention provides an audio test system 100, which includes a mobile terminal (earphone) 10 to be tested and an audio test device 20 connected to the mobile terminal 10, wherein the mobile terminal 10 has a microphone 11 and an earphone 12, the earphone 12 is used for playing a first test audio signal received by the mobile terminal 10 in a vibration manner, the microphone 11 is used for receiving a test sound wave, and the mobile terminal 10 can generate a second test audio signal according to the test sound wave and output the second test audio signal to the audio test device 20; the audio test device 20 has a first input terminal connected to the first test audio signal and a second input terminal connected to the second test audio signal, and the audio test device 20 is configured to test an audio path of the mobile terminal 10 according to the received first test audio signal and the received second test audio signal, where the audio path of the mobile terminal 10 includes an audio input path connected to a microphone 11 and an audio output path connected to a receiver 12.
The utility model discloses in further embodiment, this audio test system 100 still includes vibration sensor 13, this vibration sensor 13 is connected with earphone 12 of mobile terminal 10 and audio test equipment 20's first input respectively, a vibration signal for gathering mobile terminal 10 earphone 12 department sensing and transmitting it to audio test equipment 20, convert, enlarge, handle such as filtering and generate third test audio signal and aforesaid first test audio signal and compare, judge that this mobile terminal 10 is connected with the test result of the audio output route of earphone 12.
The utility model discloses in other embodiments, this audio test system 100 still includes vibration sensor 13, this vibration sensor 13 respectively with mobile terminal 10's earphone 12 and this mobile terminal 10's chip mainboard connection for gather the vibration signal that mobile terminal 10 earphone 12 department sensed and handle it to audio signal through chip processing conversion to aforementioned first test audio signal, with the audio transmission quality that this mobile terminal 10 is connected with the audio output route of earphone 12 that improves.
Further, the mobile terminal 10 is a wired headset or a bluetooth headset based on bone vibration transmission.
In a further embodiment of the present invention, the aforementioned audio test device 20 further comprises a radio frequency transmission module 21, and the radio frequency transmission module 21 utilizes an input/output (IO) interface thereof to transmit the aforementioned first test audio signal and second test audio signal.
Further, the audio testing apparatus 20 further includes a processing unit 22 installed with audio testing software, where the audio testing software is configured to process the frequency domain parameters of the first testing audio signal and the second testing audio signal respectively, and determine the testing result of the audio channel of the mobile terminal 10 according to the frequency domain parameters.
Further, the frequency domain parameters are the parameter characteristics of the response of the cochlea of the human ear, including frequency response curve, distortion curve, resonant frequency and sensitivity.
Further, the Processing Unit 22 is any one selected from, but not limited to, a Central Processing Unit (CPU), a Microcontroller (MCU), a data Processing chip, or an information Processing Unit having a data Processing function.
Taking the processing unit 22 as a Microcontroller (MCU) as an example, the existing Microcontroller (MCU) needs to be matched with analog and hybrid ICs to form a system to complete a series of receiving and processing audio signals, and these peripherals include: a codec, an audio analog-to-digital converter (ADC)/digital-to-analog converter (DAC), a power amplifier, an ethernet Interface, a High Definition Multimedia Interface (HDMI), a bluetooth module, a Wireless Fidelity (Wi-Fi) module, a GPS module, a Frequency Modulation (FM) module, power Management, and the like.
In a further embodiment of the present invention, the audio test apparatus 20 further comprises a test microphone 23, the test microphone 23 is connected to the audio test apparatus 20 through a peripheral interface, so as to process the received test sound wave into an audio signal with a certain frequency by using the audio test apparatus 20.
In other embodiments of the present invention, the test sound wave received by the microphone 11 of the mobile terminal 10 includes the current environmental noise (including the electromagnetic interference received in the signal transmission) and/or the voice of the tester sent within a certain distance.
The Audio test software in this embodiment is not limited, and the Audio test device 20 may be a Sound check Audio tester, an Audio Precision Audio test analyzer, an MLSSA Audio tester, a CLIO Audio tester, a B & K Audio tester, an LMS Audio tester, or an AudioExpert Audio tester, and may also be a mobile network device such as a mobile phone, a computer, a tablet, and the like, which is not limited herein.
Specifically, in an embodiment of the present invention, the audio test device 20 may be utilized to perform data sampling on the received audio signal such as the first test audio signal output by the receiver 12 of the mobile terminal 10 (or the second test audio signal input by the microphone 11 of the mobile terminal 10), and perform Fast Fourier Transform (FFT) on the sampled data, so as to conveniently determine the frequency of the test audio signal such as the first test audio signal (or the second test audio signal). The difference between the frequency of the audio signal corresponding to the test sound wave (or the audio signal converted from the human voice collected by the audio test device 20) and the frequency of the test audio signal, such as the first test audio signal (or the second test audio signal), is compared with a preset range, so as to test the output path of the earpiece 12 (or the input path of the microphone 11) of the mobile terminal 10 (bone conduction headset).
Fig. 3 is a flowchart illustrating the operation of the audio testing system according to the embodiment of the present invention.
Referring to fig. 3, after the audio testing system 100 provided by the embodiment of the present invention is started, when an input path of the microphone 11 of the earphone 10 to be tested is tested, a vibration sound wave formed by a speaker or provided audio signals with different frequencies on the microphone 11 is converted to generate a second test audio signal through the earphone 10 to be tested and an audio signal converted from the test sound wave collected by the test microphone 23 on the audio testing device 20 is compared, and if a difference between a frequency of the second test audio signal and a frequency of the audio signal is within a preset range, a test of the earphone 10 to be tested through the audio input path is determined. If the difference between the frequency of the second test audio signal and the frequency of the audio signal is outside the preset range, it is determined that the test of the audio input path of the earphone 10 to be tested fails, that is, the quality of the patch of the device on the input path of the microphone 11 connected to the earphone 10 to be tested is problematic or the interface of the assembled earphone microphone 11 is faulty.
Furthermore, the tester can only collect the noise of the current environment by using the fact that the tester does not speak under the normal environment, and the collected and converted noise audio signal is combined with the audio signal to compare the second test audio signal so as to further judge the noise reduction processing capacity of the earphone 10 to be tested on the audio input channel, so that the testing accuracy of the audio testing system 100 on the earphone 10 to be tested is further improved.
When an output path of an earpiece 12 of an earpiece 10 to be tested is tested, an audio signal with a certain frequency is converted to generate a vibration sound wave and the vibration sound wave is transmitted to the earpiece 12 of the earpiece 10 to be tested, on one hand, the vibration sound wave is received by a human ear wearing the earpiece 10 to perform a subjective sensing test, on the other hand, the vibration sound wave sensed at the earpiece 12 is transmitted to an audio test device 20 through a lead wire connected with the vibration sound wave by using a vibration sensor, so that the received vibration sound wave is converted into a first test audio signal by using the audio test device 20, the first test audio signal is subjected to data sampling, and the sampled data is subjected to fast fourier transform, so that the frequency of the first test audio signal is determined, and meanwhile, the comparison is performed by using the frequency of the first test audio signal and the frequency of the audio signal, and if the difference between the frequency of the first test audio signal and the frequency of the audio signal is within a preset range Within the enclosure, the test that the earphone 10 to be tested passes the audio output channel is judged; if the difference between the frequency of the first test audio signal and the frequency of the audio signal is outside the preset range, it is determined that the test of the audio output path of the earphone 10 to be tested fails, that is, the quality of the patch of the device on the output path of the earphone 12 connected to the earphone 10 to be tested is problematic or the interface of the assembled earphone 12 fails.
And simultaneously determining whether the loudness and distortion are within an acceptable range. If the loudness of the audio signal is too low, poor assembly or foreign objects clogging the earpiece 12 may be indicated. If the distortion of the audio signal is too large, it indicates that the harmonic signal is too loud.
With the above test, the following aspects of the input path of the microphone 11 and the output path of the earpiece 12 of the mobile terminal 10 (bone conduction headset) can be tested:
(1) detecting the quality of the patches of the devices on the two paths;
(2) detecting the quality of a microphone path in a microphone jack;
(3) the audio quality of a horn in the handset is detected.
According to the embodiment of the utility model provides an audio test system can realize the test to the input route of mobile terminal's microphone and the output route of earphone. The input channel of the microphone and the output channel of the receiver combine and cross-use the acoustic signal and the electric signal of the audio frequency, so as to avoid the generation of crosstalk. And moreover, the audio frequency loop frequency sweeping is carried out in real time by adopting a sound-electricity signal cross loop method, so that unnecessary delay is reduced, and the testing time is shortened. In addition, the invention adopts fewer test instruments, thereby having higher stability, higher test precision and low test cost and being suitable for large-scale production.
To sum up, the utility model provides an audio test system, including the mobile terminal that has microphone and earphone that awaits measuring and the audio test equipment who is connected with this mobile terminal, wherein, listen a section of thick bamboo and be used for vibrating the broadcast with the first test audio signal that this mobile terminal (earphone based on bone vibration transmission) received, mobile terminal generates second test audio signal and exports it to audio test equipment according to the test sound wave that this microphone received; and the audio test equipment can test an audio channel of the mobile terminal according to the received first test audio signal and the second test audio signal, wherein the audio channel comprises an audio input channel connected with the microphone and an audio output channel connected with the microphone. The utility model provides an audio test system can be fine avoid the interference of environmental noise in the system to audio signal transmission, can effectively judge the production quality of mobile terminal (the earphone based on bone vibration transmission), improve the degree of accuracy that the audio frequency detected.
It should be noted that in the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", and the like, indicate positional or positional relationships for convenience of description of the present invention and to simplify the description, but do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, in this document, the contained terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Obvious changes and modifications are within the scope of the present invention.
Claims (10)
1. An audio test system comprises a mobile terminal to be tested and an audio test device connected with the mobile terminal,
the mobile terminal is provided with a microphone and an earphone, the earphone is used for playing a first test audio signal received by the mobile terminal in a vibration mode, the microphone is used for receiving a test sound wave, and the mobile terminal generates a second test audio signal according to the test sound wave and outputs the second test audio signal to the audio test equipment;
the audio test equipment is provided with a first input end connected with the first test audio signal and a second input end connected with the second test audio signal, and the audio test equipment is used for testing an audio channel of the mobile terminal according to the received first test audio signal and the second test audio signal.
2. The audio testing system of claim 1, further comprising:
and the vibration sensor is respectively connected with the receiver of the mobile terminal and the first input end of the audio test equipment and is used for acquiring a vibration signal at the receiver of the mobile terminal and transmitting the vibration signal to the audio test equipment.
3. The audio testing system of claim 1, further comprising:
and the vibration sensor is respectively connected with the receiver of the mobile terminal and the chip main board of the mobile terminal and is used for collecting vibration signals at the receiver of the mobile terminal and transmitting the vibration signals to the chip main board.
4. The audio testing system according to claim 2 or 3, wherein the mobile terminal is a wired headset or a Bluetooth headset based on bone vibration transmission.
5. The audio testing system of claim 1, wherein the audio testing device further comprises a radio frequency transmission module to transmit the first test audio signal and the second test audio signal.
6. The audio testing system of claim 5, wherein the audio testing device further comprises:
and the processing unit is provided with audio test software, and the audio test software is used for respectively processing the frequency domain parameters of the first test audio signal and the second test audio signal and judging the test result of the audio channel of the mobile terminal according to the frequency domain parameters.
7. The audio testing system of claim 6, wherein the processing unit is any one selected from a central processing unit, a microcontroller and a data processing chip.
8. The audio testing system of claim 6, wherein the frequency domain parameters are parametric characteristics of the response at the cochlea of the human ear, including frequency response curves, distortion curves, resonant frequencies, and sensitivities.
9. The audio testing system of claim 1, wherein the audio testing device further comprises:
a test microphone to receive the test sound wave and process the test sound wave into an audio signal having a frequency using the audio test device.
10. The audio testing system of claim 6, wherein the audio path of the mobile terminal comprises an audio input path to which the microphone is connected and an audio output path to which the earpiece is connected.
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| CN113709648A (en) * | 2021-08-27 | 2021-11-26 | 重庆紫光华山智安科技有限公司 | Microphone and loudspeaker collaborative testing method, system, medium and electronic terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113709648A (en) * | 2021-08-27 | 2021-11-26 | 重庆紫光华山智安科技有限公司 | Microphone and loudspeaker collaborative testing method, system, medium and electronic terminal |
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Address after: 5 / F, building C, swan block, Wuxi Software Park, 111 Linghu Avenue, Xinwu District, Wuxi City, Jiangsu Province, 214000 Patentee after: Wuxi Weigan Semiconductor Co.,Ltd. Address before: 5 / F, building C, swan block, Wuxi Software Park, 111 Linghu Avenue, Xinwu District, Wuxi City, Jiangsu Province, 214000 Patentee before: Wuxi Weil Semiconductor Co.,Ltd. |
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