CN111083625A - Microphone performance testing method, testing management equipment and testing system - Google Patents
Microphone performance testing method, testing management equipment and testing system Download PDFInfo
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Abstract
The invention discloses a testing method, testing management equipment and a testing system for microphone performance, wherein the testing management equipment is respectively in communication connection with an audio analysis device and a simulation mouth, the audio analysis device outputs sound signals to a microphone to be tested through the simulation mouth, and the method comprises the following steps: providing a window for setting a first test parameter, the first test parameter comprising a swept sound pressure level range of a first target sound signal; selecting a swept-amplitude sound pressure level of the first target sound signal from the swept-amplitude sound pressure level range; determining a working amplitude of the audio analysis device according to the scanning sound pressure level based on a preset mapping relation between the sound pressure level and the amplitude, and configuring the audio analysis device according to the working amplitude; calling an audio analysis device to work so as to transmit a first target sound signal to a microphone to be tested through a simulation mouth; the audio analysis device generates a first analysis result according to the first target sound signal and the signal picked by the microphone to be detected.
Description
Technical Field
The invention relates to the technical field of microphone testing, in particular to a microphone performance testing method, a testing management device and a testing system.
Background
When testing the total harmonic distortion rate and the high sound pressure impact performance of the microphone, an Audio Analyzer (AP) and the like are required to be called for testing, and testing of different items such as amplitude sweeping, frequency sweeping, high sound pressure impact and the like is completed through configuration of the Audio analyzer.
At present, parameter configuration is usually performed on an audio analyzer and working parameters of the audio analyzer are calibrated in a manual mode, but the manual mode has the problems of complicated calling process, low efficiency and easy error when non-professional performs parameter configuration.
In addition, the existing audio analysis instrument is adopted to carry out testing by self-contained software, test data needs to be manually exported, and when repeated testing is carried out under the same test condition, the previous data needs to be manually deleted, so that the test data is easy to be confused, the test result is easy to be influenced by testers, and the test accuracy is poor.
Disclosure of Invention
It is an object of the present invention to provide a new technical solution for testing the performance of a microphone.
According to a first aspect of the present invention, there is provided a method for testing microphone performance, which is implemented by a test management device, the test management device is respectively connected to an audio analysis device in communication, and the audio analysis device outputs a sound signal to a microphone to be tested through an artificial mouth, and the method includes:
providing a window for setting a first test parameter, the first test parameter comprising a swept sound pressure level range of a first target sound signal;
selecting the amplitude sound pressure level of the first target sound signal from the amplitude sound pressure level range;
determining a working amplitude of the audio analysis device according to the scanning sound pressure level based on a preset mapping relation between the sound pressure level and the amplitude, and configuring the audio analysis device according to the working amplitude;
calling the audio analysis device to work so as to transmit the first target sound signal to a microphone to be tested through the simulation mouth;
and the audio analysis device generates a first analysis result according to the first target sound signal and the signal picked by the microphone to be detected.
Optionally, the determining the working amplitude of the audio analysis device according to the amplitude sound pressure level based on the preset mapping relationship between the sound pressure level and the amplitude includes:
setting a preliminary working amplitude of the audio analysis device according to the amplitude sound pressure level based on a preset mapping relation between the sound pressure level and the amplitude;
calling the audio analysis device to work so as to emit sound signals to a standard microphone through the simulation mouth;
the audio analysis device determines reference sensitivity according to the signal picked by the standard microphone;
generating a calibration parameter according to the difference value of the reference sensitivity and a preset standard sensitivity;
and adjusting the preliminary working amplitude of the audio analysis device according to the calibration parameter until the difference value between the reference sensitivity and a preset standard sensitivity meets a first precision threshold, and recording and storing the working amplitude of the audio analysis device.
Optionally, the method further comprises:
providing a window for setting second test parameters, the second test parameters including a frequency of a second target sound signal and a swept frequency sound pressure level;
determining working parameters of the audio analysis device according to the frequency and the sweep frequency sound pressure level of the second target sound signal, and configuring the audio analysis device according to the working parameters;
calling the audio analysis device to work so as to transmit the second target sound signal to the microphone to be tested through the simulation mouth;
and the audio analysis device generates a second analysis result according to the second target sound signal and the signal picked up by the microphone to be tested.
Optionally, the determining the operating parameter of the audio analysis device according to the frequency of the second target sound signal and the swept frequency sound pressure level includes:
setting preliminary working parameters of the audio analysis device according to the frequency of the second target sound signal and the sweep frequency sound pressure level;
calling the audio analysis device to work so as to emit sound signals to a standard microphone through the simulation mouth;
the audio analysis device determines a first reference frequency response curve according to the signals picked by the standard microphone;
generating a compensation curve according to the difference value of the first reference frequency response curve and a preset standard frequency response curve;
and adjusting the preliminary working parameters of the audio analysis device according to the first reference frequency response curve and the compensation curve, and determining the working parameters of the audio analysis device.
Optionally, after the preliminary operating parameters of the audio analysis apparatus are adjusted according to the first reference frequency response curve and the compensation curve, and the operating parameters of the audio analysis apparatus are determined, the method further includes:
based on the working parameters, calling the audio analysis device to work so as to emit sound signals to a standard microphone through the simulated mouth;
the audio analysis device determines a second reference frequency response curve according to the signal picked by the standard microphone;
comparing the second reference frequency response curve with the standard frequency response curve, and determining the difference value between the second reference sensitivity corresponding to each frequency point in the second reference frequency response curve and the standard sensitivity;
if the number of the difference values between the second reference sensitivity and the standard sensitivity which are not within the range of the preset second precision threshold value meets the preset number threshold value, recording and storing working parameters of the audio analysis device;
and if the number of the difference values between the second reference sensitivity and the standard sensitivity is not within the range of the preset second precision threshold value does not meet the preset number threshold value, correcting the working parameters of the audio analysis device according to the difference value between the second reference frequency response curve and the preset standard frequency response curve.
Optionally, the method further comprises:
providing a window for setting a third test parameter, the third test parameter comprising high sound pressure impact audio data;
providing the high sound pressure impact audio data to the audio analysis device, and calling the audio analysis device to work so as to transmit the high sound pressure impact audio data to a microphone to be tested through the simulation mouth;
and the audio analysis device collects the signals picked by the microphone to be detected to generate a third analysis result.
Optionally, the audio analysis apparatus is provided with a plurality of signal input channels, and the plurality of signal input channels are used for being connected with the microphone to be tested to form a plurality of test channels; the method further comprises the following steps:
providing a window for setting test channel information and the type of a microphone to be tested;
and configuring the audio analysis device to be connected with the microphone to be tested according to the test channel information, and configuring the type of an input signal of the audio analysis device according to the type of the microphone to be tested.
Optionally, the method further comprises:
providing a window for setting a clock signal;
and configuring an audio analysis device according to the clock signal so that the audio analysis device provides a correct clock signal for the digital microphone.
According to a second aspect of the present invention, there is provided a test management apparatus, the test management apparatus being respectively in communication connection with audio analysis devices that output sound signals to a microphone under test through the simulated mouth, the test management apparatus comprising a memory and a processor, the memory storing a computer program that, when executed by the processor, implements the method as provided by the first aspect of the present invention.
According to a third aspect of the present invention, there is provided a test system comprising a test management apparatus, an audio analysis device and a simulation mouth as provided in the second aspect of the present invention, the test management apparatus being respectively in communication connection with the audio analysis device, the audio analysis device outputting sound signals to a microphone to be tested through the simulation mouth.
According to the microphone performance testing method provided by the embodiment of the disclosure, by providing a window for setting a first testing parameter, the first testing parameter includes a sweep level range of a first target sound signal, determining a working amplitude of an audio analysis device according to the sweep level based on a preset mapping relation between a sound pressure level and the amplitude, automatically calling the audio analysis device to transmit the first target sound signal to a microphone to be tested through a simulation mouth based on the working amplitude, and calling the audio analysis device to generate a first analysis result according to the first target sound signal and a signal picked up by the microphone, manual participation is avoided in a testing process, an error rate of manual calibration can be reduced, and testing efficiency is further improved.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a diagram illustrating a hardware configuration of a test system according to an embodiment of the present invention;
fig. 2 is a first flow chart of a method for testing microphone performance according to a first embodiment of the present invention;
fig. 3 is a schematic flow chart diagram showing a method for testing microphone performance according to the first embodiment of the present invention;
fig. 4 shows a third flow chart of the testing method for microphone performance according to the first embodiment of the present invention;
FIG. 5 shows a schematic diagram of a window for setting first test parameters according to a first embodiment of the invention;
FIG. 6 shows a schematic diagram of a window for setting second test parameters according to a first embodiment of the invention;
FIG. 7 is a diagram illustrating a window for setting a third test parameter according to the first embodiment of the present invention
Fig. 8 is a schematic diagram showing a hardware configuration of a test management apparatus according to a second embodiment of the present invention;
fig. 9 shows a hardware configuration diagram of a test system according to a third embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
< hardware configuration >
As shown in fig. 1, a hardware configuration diagram of a test system 100 according to an embodiment of the present invention is provided.
In this embodiment, the test system 100 may be used to detect microphone performance. For example, the method is used for testing Total Harmonic Distortion (THD) of a microphone, high sound pressure impact performance, and the like.
The test system 100 may include a test management apparatus 1000, an audio analysis device 2000, and a simulation mouth 3000, the test management apparatus 1000 being connected to the audio analysis device 2000 and the simulation mouth 3000, respectively. The test management apparatus 1000 may be used to configure the audio analysis device 2000 and control the operation of the audio analysis device 2000. The audio analysis device 200 may be configured to emit a sound signal to the microphone to be tested through the simulation mouth 3000, and to collect a signal picked up by the microphone to be tested, and analyze the collected signal to generate an analysis result.
In one example, the test management apparatus 1000 may be as shown in fig. 1, and include a processor 1100, a memory 1200, an interface device 1300, a communication device 1400, a display device 1500, an input device 1600, a speaker 1700, a microphone 1800, and the like.
The processor 1100 may be a central processing unit CPU, a microprocessor MCU, or the like. The memory 1200 includes, for example, a ROM (read only memory), a RAM (random access memory), a nonvolatile memory such as a hard disk, and the like. The interface device 1300 includes, for example, a USB interface, a headphone interface, and the like. The communication device 1400 may include a short-range communication device, such as any device that performs short-range wireless communication based on short-range wireless communication protocols such as the Hilink protocol, WiFi (IEEE 802.11 protocol), Mesh, bluetooth, ZigBee, Thread, Z-Wave, NFC, UWB, LiFi, etc., and the communication device 1400 may also include a long-range communication device, such as any device that performs WLAN, GPRS, 2G/3G/4G/5G long-range communication. The display device 1500 is, for example, a liquid crystal display panel, a touch panel, or the like. The input device 1600 may include, for example, a touch screen, a keyboard, a somatosensory input, and the like. A user can input/output voice information through the speaker 1700 and the microphone 1800.
Although a plurality of devices are shown in fig. 1 for the test management apparatus 1000, the present invention may relate to only some of the devices, for example, the test management apparatus 1000 relates to only the memory 1200 and the processor 1100.
In the above description, the skilled person can design the instructions according to the solutions provided in the present disclosure. How the instructions control the operation of the processor is well known in the art and will not be described in detail herein.
The test system shown in fig. 1 is merely illustrative and is in no way intended to limit the present disclosure, its application, or uses.
< first embodiment >
The embodiment provides a method for testing the performance of a microphone. The method is implemented by the test management device. The test management equipment is in communication connection with the audio analysis device, the audio analysis device outputs sound signals to the microphone to be tested through the simulation mouth, and the signals picked by the microphone to be tested are analyzed to obtain an analysis result.
As shown in fig. 2, the method for testing the performance of the microphone may include the following steps S2100 to S2500.
In step S2100, a window for setting a first test parameter is provided.
In this embodiment, a window for setting the first test parameters is provided for the user to input the first test parameters for performing the sweep test on the microphone. The amplitude sweep test can be used to analyze the total harmonic distortion rate and sensitivity of the microphone under test.
In one example, the first test parameter may include a range of swept sound pressure levels of the first target sound signal. The first target sound signal is a sound signal emitted to the microphone when the microphone is subjected to a sweep test. This example can set a sweep sound pressure level range of the first target sound signal by setting a sweep initial sound pressure level and a sweep end sound pressure level, and perform a sweep test on the microphone based on the sweep sound pressure level range. For example, the initial sound pressure level of the scan is 94dBSPL (sound pressure levels), and the sound pressure level of the scan is 100dBSPL, i.e., the sound pressure level of the scan ranges from 94dBSPL to 100 dBSPL.
In one example, before providing the window for setting the first test parameter. The microphone performance testing method can further comprise the following steps:
a window is provided for setting test channel information and the type of microphone under test.
And configuring the audio analysis device to be connected with the microphone to be tested according to the test channel information, and configuring the type of the input signal of the audio analysis device according to the type of the microphone to be tested.
In this example, the audio analysis apparatus is provided with a plurality of signal input channels, the plurality of signal input channels are used for connecting with the microphone to be tested to form a plurality of test channels, and the test channel information is port information of the channel connecting the microphone to be tested with the audio analysis apparatus. When the test management equipment is used for testing the microphone, the test channel of the audio analysis device can be selected according to the requirements of a user. The set test channel information should be consistent with the information of the test channel of the audio analysis device selected by the user.
The types of microphones to be tested include digital type microphones and analog type microphones. When the microphone to be tested is a digital microphone, the input signal of the audio analysis device is configured to be a digital signal. When the microphone to be tested is an analog microphone, the input signal of the audio analysis device is configured to be an analog signal.
According to the scheme of the example, by setting the test channel information and configuring the type of the input signal of the audio analysis device according to the type of the microphone to be tested, the correct acquisition of the test signal data of the audio analysis device can be ensured.
In one example, before providing the window for setting the first test parameter. The microphone performance testing method can further comprise the following steps:
a window is provided for setting the clock signal.
And configuring an audio analysis device according to the clock signal so that the audio analysis device provides a correct clock signal for the digital microphone to be measured.
According to the scheme of the above example, a window for setting the clock signal is provided, and when the microphone to be tested is a digital microphone, the clock signal of the audio analysis device can be configured, so that the digital microphone can work to provide different clock signal modes for the audio analysis device.
After providing the window for setting the first test parameter, entering:
step S2200 is selecting a swept-amplitude sound pressure level of the first target sound signal from the swept-amplitude sound pressure level range.
Step S2300, determining a working amplitude of the audio analysis device according to the swept sound pressure level based on a preset mapping relation between the sound pressure level and the amplitude, and configuring the audio analysis device according to the working amplitude.
In this embodiment, when the amplitude sweep test is performed on the microphone, the frequency of the sound signal emitted to the microphone by the audio analysis device is not changed, and the amplitude value is changed along with time. The operating amplitude of the audio analysis means may be determined in dependence on the swept sound pressure level of the desired sound signal. The mapping relation between the sound pressure level and the amplitude is set according to engineering experience or experimental simulation results.
In a more specific example, determining the working amplitude of the audio analysis apparatus according to the swept-amplitude sound pressure level based on a preset mapping relationship between the sound pressure level and the amplitude may further include: steps S2310-S2350.
Step S2310, setting a preliminary working amplitude of the audio analysis device according to the swept sound pressure level based on a preset mapping relationship between the sound pressure level and the amplitude.
Step S2320, the audio analysis device is invoked to work so as to emit a sound signal to the standard microphone through the simulated mouth.
In this example, a simulated mouth may be used to simulate the average directivity and radiation pattern of a human mouth. And calling an audio analysis device, wherein the audio analysis device works according to the primary working amplitude value to transmit an electric signal to the simulation mouth, and the simulation mouth converts the received electric signal into a sound signal transmitting value microphone.
A standard microphone refers to a microphone used to calibrate the signal emitted by the audio analysis device. The standard microphone has stable performance.
In step S2330, the audio analysis device determines a reference sensitivity from the signal picked up by the standard microphone.
The standard microphone picks up the sound signal emitted by the audio analysis device through the simulated mouth and returns an electric signal to the audio analysis device, and the audio analysis device analyzes the collected electric signal to obtain the sensitivity of the standard microphone under the sound signal corresponding to the 94dBSPL amplitude-scanning sound pressure level, namely the reference sensitivity.
Step S2340, generating a calibration parameter according to a difference between the reference sensitivity and a preset standard sensitivity.
The standard sensitivity can be used for judging whether the reference sensitivity meets the requirement, if the reference sensitivity meets the requirement, the working amplitude of the sound signal corresponding to the reference sensitivity meets the requirement, and calibration is not needed. If the reference sensitivity does not meet the requirement, the working amplitude of the sound signal corresponding to the reference sensitivity does not meet the requirement, and calibration is needed. The standard sensitivity is the sensitivity of a standard microphone in a sound deadening chamber, resulting in a sensitivity of the standard microphone at a sound signal level of 94 dBSPL.
Step S2350, the preliminary working amplitude of the audio frequency analysis device is adjusted according to the calibration parameter until the difference value between the reference sensitivity and the preset standard sensitivity meets a first precision threshold value, and the working amplitude of the audio frequency analysis device is recorded and stored.
The first precision threshold is used for measuring the deviation between the size of the sound signal output to the product end by the audio analysis device and the size of the first target sound signal, and the first precision threshold can reflect whether the sound signal output to the product end by the audio analysis device meets the requirement or not. The first accuracy threshold may be set based on engineering experience or experimental simulation results.
According to the scheme of the example, the standard microphone can be adopted, the acquired reference sensitivity is compared with the standard sensitivity, the size of the sound signal output to the product end by the audio analysis device is calibrated, the size of the sound signal output to the microphone by the audio analysis device can be ensured to be consistent with the size of the first target sound signal, and therefore the accuracy of the test result is improved. In addition, this embodiment can calibrate the working amplitude of audio analysis device automatically, avoids artifical the participation in the calibration process, can reduce the error rate of artifical calibration to further improve efficiency of software testing.
Determining the working amplitude of the audio analysis device according to the scanning sound pressure level based on the mapping relation between the preset sound pressure level and the amplitude, and after configuring the audio analysis device according to the working amplitude, entering:
step S2400, invoking an audio analysis device to work to emit a first target sound signal to the microphone to be tested through the simulated mouth.
The audio analysis device works according to the amplitude scanning sound pressure level range set by the user to transmit a first target sound signal to the microphone to be tested through the simulation mouth so as to carry out amplitude scanning test on the microphone to be tested.
In step S2500, the audio analysis device generates a first analysis result according to the first target sound signal and the signal picked up by the microphone to be tested.
The microphone to be tested receives the first target sound signal emitted by the audio analysis device and returns an electric signal to the audio analysis device, and the audio analysis device analyzes the electric signal to generate a first analysis result. The first analysis result may be a graph, a curve, or the like. For example, the first analysis result is a relationship curve between the swept-amplitude sound pressure level of the first target sound signal and the total harmonic distortion of the microphone, the change of the total harmonic distortion of the microphone to be tested under the first target sound signal with different swept-amplitude sound pressure levels can be seen according to the analysis result, and whether the performance of the microphone to be tested is qualified or not can be determined according to the total harmonic distortion of the microphone.
According to the scheme of the above example, the calling audio analysis device generates an analysis result according to the first target sound signal and the signal picked up by the microphone, and stores the analysis result, so that an engineer can conveniently call and check the analysis result.
According to the method for testing the performance of the microphone, provided by the embodiment of the invention, the window for setting the first test parameter can be provided, the first test parameter comprises the amplitude sound pressure level range of the first target sound signal, the working amplitude of the audio analysis device is determined according to the amplitude sound pressure level based on the preset mapping relation between the sound pressure level and the amplitude, the audio analysis device is automatically called based on the working amplitude to transmit the first target sound signal to the microphone to be tested through the simulation mouth, and the audio analysis device is called to generate the first analysis result according to the first target sound signal and the signal picked up by the microphone, so that the manual participation is avoided in the test process, the error rate of manual calibration can be reduced, and the test efficiency is further improved.
In one example, as shown in fig. 3, the method for testing the performance of the microphone may further include the following steps S3100 to S3400.
Step S3100, providing a window for setting the second test parameter.
In this embodiment, a window for setting the second test parameters is provided for the user to input the second test parameters for performing the frequency sweep test on the microphone. The frequency sweep test can be used to analyze the total harmonic distortion rate and sensitivity of the microphone under test.
In one example, the second test parameters may include a frequency and a swept frequency sound pressure level of the second target sound signal. The second target sound signal is a sound signal emitted to the microphone when the microphone is subjected to frequency sweep test. The frequency of the second target sound signal includes a plurality of scanning frequency points. For example, the scanning frequency points of the second target sound signal may be 100Hz, 230.6Hz, 309.9Hz, 429Hz, 512.3Hz, 611.7Hz, 709.1Hz, 730.4Hz, 752.3Hz, 774.8Hz, 798.1Hz, 822Hz, 3000Hz, 3500Hz, 4000Hz, 4500Hz, 5000Hz, 5500Hz, and 6000 Hz. The frequency of the second target sound signal may be set according to engineering experience or experimental simulation results.
In one example, before providing the window for setting the second test parameter. The microphone performance testing method can further comprise the following steps:
a window is provided for setting test channel information and the type of microphone under test.
And configuring the audio analysis device to be connected with the microphone to be tested according to the test channel information, and configuring the type of the input signal of the audio analysis device according to the type of the microphone to be tested.
In this example, the audio analysis apparatus is provided with a plurality of signal input channels, the plurality of signal input channels are used for connecting with the microphone to be tested to form a plurality of test channels, and the test channel information is port information of the channel connecting the microphone to be tested with the audio analysis apparatus. When the test management equipment is used for testing the microphone, the test channel of the audio analysis device can be selected according to the requirements of a user. The set test channel information should be consistent with the information of the test channel of the audio analysis device selected by the user.
The types of microphones to be tested include digital type microphones and analog type microphones. When the microphone to be tested is a digital microphone, the input signal of the audio analysis device is configured to be a digital signal. When the microphone to be tested is an analog microphone, the input signal of the audio analysis device is configured to be an analog signal.
According to the scheme of the example, by setting the test channel information and configuring the type of the input signal of the audio analysis device according to the type of the microphone to be tested, the correct acquisition of the test signal data of the audio analysis device can be ensured.
In one example, before providing the window for setting the second test parameter. The microphone performance testing method can further comprise the following steps:
a window is provided for setting the clock signal.
And configuring an audio analysis device according to the clock signal so that the audio analysis device provides a correct clock signal for the digital microphone to be measured.
According to the scheme of the above example, a window for setting the clock signal is provided, and when the microphone to be tested is a digital microphone, the clock signal of the audio analysis device can be configured to provide different clock signal modes when the digital microphone works in the audio analysis device.
After providing the window for setting the second test parameter, entering:
step S3200, determining a working parameter of the audio analysis device according to the frequency of the second target sound signal and the sweep frequency sound pressure level, and configuring the audio analysis device according to the working parameter.
The operating parameters of the audio analysis means comprise the frequency and amplitude of the output signal of the audio analysis means. The audio analysis device outputs signals to the product end according to the set working parameters, the amplitude of the output signals is set according to the sound pressure level, and in order to ensure that the size of the signals output to the product end by the audio analysis device through the simulation mouth is consistent with the size of the target sound signals, the amplitude of the signals output by the audio analysis device needs to be calibrated so as to determine the working parameters of the audio analysis device.
In a more specific example, determining the operating parameter of the audio analysis device according to the frequency of the second target sound signal and the swept frequency sound pressure level may further include: steps S3210-S3250.
Step S3210, setting preliminary working parameters of the audio analysis device according to the frequency of the second target sound signal and the swept frequency sound pressure level.
Step S3220 calls the audio analysis device to operate to emit a sound signal to the standard microphone through the artificial mouth.
In this example, a simulated mouth may be used to simulate the average directivity and radiation pattern of a human mouth. And calling an audio analysis device, wherein the audio analysis device works according to the primary working parameters to transmit electric signals to the simulation mouth, and the simulation mouth converts the received electric signals into a sound signal transmitting value microphone.
A standard microphone refers to a microphone used to calibrate the signal emitted by the audio analysis device. The standard microphone has stable performance.
In step S3230, the audio analysis apparatus determines a first reference frequency response curve according to the signal picked up by the standard microphone.
The standard microphone picks up a sound signal emitted by the audio analysis device through the simulated mouth and returns an electric signal to the audio analysis device, and the audio analysis device analyzes the collected electric signal to obtain a relation curve of the frequency and the sensitivity of the sound signal of the standard microphone under the sweep frequency sound pressure level, namely a first reference frequency response curve.
Step S3240, a compensation curve is generated according to a difference between the first reference frequency response curve and a preset standard frequency response curve.
The standard frequency response curve can be used for judging whether the first reference frequency response curve meets the requirement, and if the first reference frequency response curve does not meet the requirement, a compensation curve is generated according to the difference between the first reference frequency response curve and a preset standard frequency response curve so as to correct the working parameters.
Step S3250, adjusting the preliminary working parameters of the audio analysis device according to the first reference frequency response curve and the compensation curve, and determining the working parameters of the audio analysis device.
According to the scheme of the example, the standard microphone can be adopted, the size of the sound signal output to the product end by the audio analysis device is calibrated by comparing the acquired first reference frequency response curve with the standard frequency response curve, the size of the sound signal output to the microphone by the audio analysis device can be ensured to be consistent with the size of the second target sound signal, and therefore the accuracy of the test result is improved. In addition, this embodiment can calibrate audio analysis device's working parameter automatically, avoids artifical the participation in the calibration process, can reduce the error rate of artifical calibration to further improve efficiency of software testing.
In a more specific example, the preliminary operating parameters of the audio analysis device are adjusted according to the first reference frequency response curve and the compensation curve, and the operating parameters of the audio analysis device are determined, and then the method may further include: steps S4100-S4500.
Step S4100, based on the working parameters, invoking an audio analysis device to work to emit a sound signal to a standard microphone through a simulated mouth.
In step S4200, the audio analysis device determines a second reference frequency response curve according to the signal picked up by the standard microphone.
Step S4300, comparing the second reference frequency response curve with the standard frequency response curve, and determining a difference value between the second reference sensitivity corresponding to each frequency point in the second reference frequency response curve and the standard sensitivity.
In step S4400, if the number of the difference between the second reference sensitivity and the standard sensitivity is not within the preset second precision threshold range meets the preset number threshold, recording and storing the operating parameters of the audio analysis device.
Step S4500, if the number of the difference value between the second reference sensitivity and the standard sensitivity is not within the preset second precision threshold range does not meet the preset number threshold, the working parameters of the audio analysis device are corrected according to the difference value between the second reference frequency response curve and the preset standard frequency response curve.
The second precision threshold is used for measuring the deviation between the size of the sound signal output to the product end by the audio analysis device and the size of the second target sound signal. The second accuracy threshold may be set based on engineering experience or experimental simulation results. The number threshold may reflect whether the second sound signal output to the product end by the audio analysis device meets the requirement, and may be set according to engineering experience or experimental simulation results, for example, the number threshold is 2.
According to the scheme of the example, after the preliminary working parameters of the audio analysis device are adjusted according to the first reference frequency response curve and the compensation curve, whether the adjustment of the working parameters is qualified or not is further determined by determining the number of the difference value between the second reference sensitivity and the standard sensitivity, which is not within the range of the preset second precision threshold, so that the consistency between the size of the sound signal output to the microphone by the audio analysis device and the size of the second target sound signal can be ensured, and the accuracy of the test result is improved.
Determining working parameters of the audio analysis device according to the frequency and the sweep frequency sound pressure level of the second target sound signal, and after the audio analysis device is configured according to the working parameters, entering:
and step S3300, calling the audio analysis device to work so as to emit a second target sound signal to the microphone to be tested through the simulated mouth.
The audio analysis device works according to the frequency sweeping sound pressure level set by the user to transmit a second target sound signal to the microphone to be tested through the simulation mouth so as to perform frequency sweeping test on the microphone to be tested.
In step S3400, the audio analysis device generates a second analysis result according to the second target sound signal and the signal picked up by the microphone to be detected.
And the microphone to be tested receives the second target sound signal emitted by the audio analysis device and returns an electric signal to the audio analysis device, and the audio analysis device analyzes the electric signal to generate a second analysis result. The second analysis result may be a graph, a curve, or the like. For example, the second analysis result is a relationship curve between different sound signal frequencies at different frequency sweep sound pressure levels of the second target sound signal and the total harmonic distortion of the microphone, the total harmonic distortion of the microphone to be tested at different frequency sweep sound pressure levels under the second target sound signal can be seen to change with the sound signal frequency according to the analysis result, and whether the performance of the microphone to be tested is qualified or not can be determined according to the total harmonic distortion of the microphone.
In one example, as shown in fig. 4, the method for testing the performance of the microphone may further include the following steps S5100 to S5300.
In step S5100, a window for setting the third test parameter is provided.
In this embodiment, a window for setting the third test parameter is provided for the user to input the third test parameter for performing the high sound pressure impact test on the microphone. The high sound pressure impact test can be used for analyzing the high sound pressure impact performance of the microphone to be tested.
In one example, the third test parameter includes high sound pressure impact audio data. The high sound pressure impact audio data may be previously prepared according to the working experience.
Step S5200, providing the high sound pressure impact audio data to the audio analysis device, and calling the audio analysis device to work so as to emit the high sound pressure impact audio data to the microphone to be tested through the simulated mouth.
Step S5300, the audio analysis device collects a signal picked up by the microphone to be tested to generate a third analysis result.
And outputting high sound pressure impact audio data to the microphone to be detected through the simulation mouth at the audio analysis device, collecting an electric signal returned by the microphone to be detected in real time, analyzing the electric signal and generating a third analysis result. The third analysis result may be a graph, a curve, or the like. For example, the third analysis result is a relation curve between time and the sensitivity of the microphone, and the change of the sensitivity of the microphone to be tested when receiving the high-sound-pressure impact audio data can be seen according to the analysis result, so that whether the high-sound-pressure impact performance of the microphone to be tested is qualified can be judged.
In a more specific example, a window for setting the first test parameter, a window for setting the second test parameter, and a window for setting the third test parameter may pop up through an option of a display interface of the test management apparatus.
For example, the display interface of the test management device includes test options including sweep test, and high acoustic pressure shock test. And clicking the scanning test, and popping up a window for setting a first test parameter. And clicking the frequency sweep test to set a window of a second test parameter. Clicking a high sound pressure impact test, and setting a window of a third test parameter. The display interface of the test management equipment also comprises a window for displaying the analysis result, and the window for displaying the analysis result displays the analysis result corresponding to the current test option in real time.
Referring to fig. 5, fig. 5 is a schematic view of a window for setting a first test parameter, when a user clicks a scan test, the window for setting the first test parameter pops up, and in the window for setting the first test parameter, the user may set a scan sound pressure level range in setting frames of "scan initial sound pressure level" and "scan end sound pressure level". Referring to fig. 6, fig. 6 is a schematic view of a window for setting a second test parameter, when a user clicks a frequency sweep test, a window for setting the second test parameter is popped up, in the window for setting the second test parameter, the user may insert a scanning frequency point of a target sound signal into a "frequency sweep table," and set a plurality of frequency sweep sound pressure levels in a setting frame of "frequency sweep sound pressure level. Referring to fig. 7, fig. 7 is a schematic diagram of a window for setting a third test parameter, when a user clicks a high sound pressure impact test, the window for setting the third test parameter pops up, and in the window for setting the third test parameter, the user may insert high sound pressure impact audio data of a target sound signal in an "import high sound pressure impact file".
According to the method for testing the performance of the microphone, provided by the embodiment of the invention, the window for setting the first test parameter can be provided, the first test parameter comprises the amplitude sound pressure level range of the first target sound signal, the working amplitude of the audio analysis device is determined according to the amplitude sound pressure level based on the preset mapping relation between the sound pressure level and the amplitude, the audio analysis device is automatically called based on the working amplitude to transmit the first target sound signal to the microphone to be tested through the simulation mouth, and the audio analysis device is called to generate the first analysis result according to the first target sound signal and the signal picked up by the microphone, so that the manual participation is avoided in the test process, the error rate of manual calibration can be reduced, and the test efficiency is further improved.
< second embodiment >
In this embodiment, a test management apparatus 800 is provided, and the test management apparatus 800 may be the test management apparatus 1000 shown in fig. 1, and as shown in fig. 8, the test management apparatus 800 is communicatively connected to an audio analysis device and a simulation mouth, respectively. The audio analysis device outputs sound signals to the microphone to be tested through the simulation mouth.
The test management apparatus 800 includes a processor 810 and a memory 820.
A memory 820 that may be used to store executable instructions;
the processor 810 may be configured to execute the method for testing the performance of the microphone as provided in the first embodiment according to the control of the executable instructions.
< third embodiment >
In the present embodiment, a test system 900 is provided, the test system 900 may be the test system 100 shown in fig. 1, as shown in fig. 9, the test system 900 may include a test management device 910, an audio analysis apparatus 920 and a simulation mouth 930, and the test management device 910 is communicatively connected to the audio analysis apparatus 920 and the simulation mouth 930, respectively. The audio analysis device 920 outputs an audio signal to the microphone to be tested through the dummy nozzle 930.
The test management device 910 may be the test management device 1000 shown in fig. 1, and the test management device 910 may also be the test management device 800 shown in fig. 8.
The above embodiments mainly focus on differences from other embodiments, but it should be clear to those skilled in the art that the above embodiments can be used alone or in combination with each other as needed.
The embodiments in the present disclosure are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments, but it should be clear to those skilled in the art that the embodiments described above can be used alone or in combination with each other as needed. In addition, for the device embodiment, since it corresponds to the method embodiment, the description is relatively simple, and for relevant points, refer to the description of the corresponding parts of the method embodiment. The system embodiments described above are merely illustrative, in that modules illustrated as separate components may or may not be physically separate.
The present invention may be a system, method and/or computer program product. The computer program product may include a computer-readable storage medium having computer-readable program instructions embodied therewith for causing a processor to implement various aspects of the present invention.
The computer readable storage medium may be a tangible device that can hold and store the instructions for use by the instruction execution device. The computer readable storage medium may be, for example, but not limited to, an electronic memory device, a magnetic memory device, an optical memory device, an electromagnetic memory device, a semiconductor memory device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a Static Random Access Memory (SRAM), a portable compact disc read-only memory (CD-ROM), a Digital Versatile Disc (DVD), a memory stick, a floppy disk, a mechanical coding device, such as punch cards or in-groove projection structures having instructions stored thereon, and any suitable combination of the foregoing. Computer-readable storage media as used herein is not to be construed as transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission medium (e.g., optical pulses through a fiber optic cable), or electrical signals transmitted through electrical wires.
The computer-readable program instructions described herein may be downloaded from a computer-readable storage medium to a respective computing/processing device, or to an external computer or external storage device via a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers and/or edge servers. The network adapter card or network interface in each computing/processing device receives computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in the respective computing/processing device.
The computer program instructions for carrying out operations of the present invention may be assembler instructions, Instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer-readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, aspects of the present invention are implemented by personalizing an electronic circuit, such as a programmable logic circuit, a Field Programmable Gate Array (FPGA), or a Programmable Logic Array (PLA), with state information of computer-readable program instructions, which can execute the computer-readable program instructions.
Aspects of the present invention are described herein with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-readable program instructions.
These computer-readable program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer-readable program instructions may also be stored in a computer-readable storage medium that can direct a computer, programmable data processing apparatus, and/or other devices to function in a particular manner, such that the computer-readable medium storing the instructions comprises an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.
The computer readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer, other programmable apparatus or other devices implement the functions/acts specified in the flowchart and/or block diagram block or blocks.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. It is well known to those skilled in the art that implementation by hardware, by software, and by a combination of software and hardware are equivalent.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the invention is defined by the appended claims.
Claims (10)
1. A microphone performance testing method is implemented through a testing management device, the testing management device is respectively in communication connection with an audio analysis device and a simulation mouth, the audio analysis device outputs sound signals to a microphone to be tested through the simulation mouth, and the method comprises the following steps:
providing a window for setting a first test parameter, the first test parameter comprising a swept sound pressure level range of a first target sound signal;
selecting the amplitude sound pressure level of the first target sound signal from the amplitude sound pressure level range;
determining a working amplitude of the audio analysis device according to the scanning sound pressure level based on a preset mapping relation between the sound pressure level and the amplitude, and configuring the audio analysis device according to the working amplitude;
calling the audio analysis device to work so as to transmit the first target sound signal to a microphone to be tested through the simulation mouth;
and the audio analysis device generates a first analysis result according to the first target sound signal and the signal picked by the microphone to be detected.
2. The method of claim 1, wherein determining the operating amplitude of the audio analysis device according to the swept sound pressure level based on a preset mapping relationship between sound pressure level and amplitude comprises:
setting a preliminary working amplitude of the audio analysis device according to the amplitude sound pressure level based on a preset mapping relation between the sound pressure level and the amplitude;
calling the audio analysis device to work so as to emit sound signals to a standard microphone through the simulation mouth;
the audio analysis device determines reference sensitivity according to the signal picked by the standard microphone;
generating a calibration parameter according to the difference value of the reference sensitivity and a preset standard sensitivity;
and adjusting the preliminary working amplitude of the audio analysis device according to the calibration parameter until the difference value between the reference sensitivity and a preset standard sensitivity meets a first precision threshold, and recording and storing the working amplitude of the audio analysis device.
3. The method of claim 1, further comprising:
providing a window for setting second test parameters, the second test parameters including a frequency of a second target sound signal and a swept frequency sound pressure level;
determining working parameters of the audio analysis device according to the frequency and the sweep frequency sound pressure level of the second target sound signal, and configuring the audio analysis device according to the working parameters;
calling the audio analysis device to work so as to transmit the second target sound signal to the microphone to be tested through the simulation mouth;
and the audio analysis device generates a second analysis result according to the second target sound signal and the signal picked up by the microphone to be tested.
4. The method of claim 3, the determining operational parameters of the audio analysis device from the frequency of the second target sound signal and the swept frequency sound pressure level, comprising:
setting preliminary working parameters of the audio analysis device according to the frequency of the second target sound signal and the sweep frequency sound pressure level;
calling the audio analysis device to work so as to emit sound signals to a standard microphone through the simulation mouth;
the audio analysis device determines a first reference frequency response curve according to the signals picked by the standard microphone;
generating a compensation curve according to the difference value of the first reference frequency response curve and a preset standard frequency response curve;
and adjusting the preliminary working parameters of the audio analysis device according to the first reference frequency response curve and the compensation curve, and determining the working parameters of the audio analysis device.
5. The method of claim 4, wherein the preliminary operating parameters of the audio analysis device are adjusted according to the first reference frequency response curve and the compensation curve, and after determining the operating parameters of the audio analysis device, the method further comprises:
based on the working parameters, calling the audio analysis device to work so as to emit sound signals to a standard microphone through the simulated mouth;
the audio analysis device determines a second reference frequency response curve according to the signal picked by the standard microphone;
comparing the second reference frequency response curve with the standard frequency response curve, and determining the difference value between the second reference sensitivity corresponding to each frequency point in the second reference frequency response curve and the standard sensitivity;
if the number of the difference values between the second reference sensitivity and the standard sensitivity which are not within the range of the preset second precision threshold value meets the preset number threshold value, recording and storing working parameters of the audio analysis device;
and if the number of the difference values between the second reference sensitivity and the standard sensitivity is not within the range of the preset second precision threshold value does not meet the preset number threshold value, correcting the working parameters of the audio analysis device according to the difference value between the second reference frequency response curve and the preset standard frequency response curve.
6. The method of claim 1, further comprising:
providing a window for setting a third test parameter, the third test parameter comprising high sound pressure impact audio data;
providing the high sound pressure impact audio data to the audio analysis device, and calling the audio analysis device to work so as to transmit the high sound pressure impact audio data to a microphone to be tested through the simulation mouth;
and the audio analysis device collects the signals picked by the microphone to be detected to generate a third analysis result.
7. The method of claim 1, the audio analysis device providing a plurality of signal input channels for connection with the microphone under test to form a plurality of test channels; the method further comprises the following steps:
providing a window for setting test channel information and the type of a microphone to be tested;
and configuring the audio analysis device to be connected with the microphone to be tested according to the test channel information, and configuring the type of an input signal of the audio analysis device according to the type of the microphone to be tested.
8. The method of claim 1, further comprising:
providing a window for setting a clock signal;
and configuring an audio analysis device according to the clock signal so that the audio analysis device provides a correct clock signal for the digital microphone.
9. A test management device communicatively connected to an audio analysis apparatus that outputs sound signals to a microphone under test through the simulated mouth, the test management device comprising a memory and a processor, the memory storing a computer program that, when executed by the processor, implements the method of any of claims 1-8.
10. A test system comprising a test management apparatus according to claim 9, an audio analysis device and a simulation mouth, the test management apparatus being in communication with the audio analysis device, respectively, the audio analysis device outputting sound signals to a microphone to be tested through the simulation mouth.
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