A system and method for automatically calibrating real ear testing equipment

Abstract

The present application discloses a system and method for automatically calibrating real ear test equipment, which relates to the technical field of calibration of real ear test equipment, and solves the problems of low calibration efficiency, poor stability of calibration results, complex operation, high technical requirements for calibration staff, and the need to use different equipment and instruments in the prior art due to the frequent intervention of human factors. The device includes: a main control module, a signal processing module, a signal acquisition module, a standard microphone, and a host computer. The calibration process of the tested equipment is fully automated, which not only greatly improves the calibration efficiency, but also has low technical requirements for the calibration staff. It only needs to use the host computer to start the calibration program, and it also avoids the situation where the intervention of staff during the calibration process affects the acoustic environment, thereby affecting the test results, making the calibration results more stable and accurate.

Description

Technical Field

[0001] The present application relates to the technical field of real ear testing equipment calibration, and in particular to a system and method for automatically calibrating real ear testing equipment. Background Art

[0002] Real-Ear Measurement (REM) refers to the process of acoustic measurement in a person's real ear, and is also one of the important methods to verify the effectiveness of hearing aids. A real-ear test device is a real-ear test device that integrates a reference microphone and a probe microphone. It objectively measures the sound signal in the ear canal by inserting a tiny microphone probe (i.e., a probe microphone) into the patient's external auditory canal near the tympanic membrane. At the same time, the reference microphone is placed under the earlobe or near the ear canal opening as a standard for comparing speaker signals to ensure the accuracy of sound field calibration. During the test, the instrument emits sound signals of specific frequencies and sound power levels, which are amplified by the hearing aid and transmitted to the ear canal and captured by the probe microphone. The captured sound signals are converted into electrical signals for recording and analysis. By comparing with the target value, the fitter can determine whether the sound output by the hearing aid is within a reasonable range and make necessary adjustments accordingly.

[0003] In order to ensure the accuracy and reliability of the measurement of the real ear test equipment, it is necessary to calibrate the test signal system and measurement system of the real ear test equipment. The calibration of the test signal system includes: the sound pressure level of the pure tone signal, frequency accuracy and harmonic distortion, the fundamental frequency of the burst tone, ON and OFF time, the sound pressure level during playback, the modulation depth and modulation rate of the warbling tone, the effective bandwidth of the narrowband noise, the transition band slope, the peak factor and spectral uniformity of the random noise and the statistical sound level of the International Speech Test Signal (ISTS); the calibration of the measurement system includes the measurement accuracy of the reference microphone and the measurement accuracy of the probe microphone.

[0004] The verification scheme of real ear test equipment in the prior art has the following disadvantages:

[0005] 1. Staff are required to operate different equipment and manually record the test results to determine whether the sound pressure level, frequency, distortion and other indicators meet the requirements;

[0006] 2. There are many test indicators, and the requirements for each test signal are different. During the test, the reference microphone and probe microphone of the left ear and the right ear need to be calibrated separately. The test time is long and the test method is repeated;

[0007] 3. The test environment requirements are high during the test. It needs to be in a free field environment. Changes in the position of people or objects will affect the acoustic performance of the environment. Summary of the invention

[0008] The purpose of this application is to overcome the problems in the prior art caused by the frequent intervention of human factors, such as low calibration efficiency, poor stability of calibration results, complicated operation, high technical requirements for calibration personnel, and the need to use different equipment and instruments, and to provide a system and method for automatically calibrating real ear testing equipment.

[0009] In a first aspect, a system for automatically calibrating a real ear test device is provided, comprising:

[0010] Main control module, signal processing module, signal acquisition module, standard microphone and host computer, including:

[0011] The main control module is used to control the device under test according to the test instructions of the host computer, collect data of the device under test, control the signal processing module, and collect the analysis results of the signal processing module;

[0012] A signal processing module is used to record and analyze the signals collected by the signal collection module;

[0013] A signal acquisition module is used to convert the acoustic signal collected by the standard microphone into an electrical signal and perform filtering and amplification processing;

[0014] Standard microphone, used to collect the required sound signals;

[0015] The host computer is used to issue test instructions and display test information.

[0016] In some possible implementations, it also includes: a communication module, which is used to realize communication between the main control module and the host computer.

[0017] In some possible implementations, the test instructions include measurement system test instructions, tone burst test instructions, warbling test instructions, narrowband noise test instructions, random noise test instructions, ISTS test instructions, and measurement system test instructions.

[0018] In a second aspect, a method for automatically calibrating a real ear test device is provided, comprising the system as described in any one of the implementations of the first aspect, the method comprising:

[0019] Obtaining a first test instruction, so that the main control module controls the sound unit of the device under test to emit a sound according to the first test instruction, and the sound signal is collected by the standard microphone. The collected sound signal is converted into an electrical signal by the signal acquisition module and filtered and amplified, and then analyzed by the signal processing module to complete the verification of the signal system of the device under test;

[0020] A second test instruction is obtained so that the main control module controls the sound-emitting unit of the device under test to emit a sound according to the first test instruction. After the sound is calibrated to the target value through the standard microphone, the host computer reads and analyzes the sound pressure levels of the probe microphone and the reference microphone of the device under test through the main control module to complete the calibration of the measurement system of the device under test.

[0021] In some possible implementations, the system and the device under test are in a anechoic environment, the pickup hole of the probe tube microphone of the device under test is fixed to the pickup hole of the reference microphone, and the standard microphone is placed close to the pickup hole of the probe tube microphone.

[0022] In some possible implementations, before the host computer issues the first test instruction or the second test instruction each time, a sweep frequency sound is played, and the signal of the sweep frequency sound is collected by the standard microphone to determine whether the acoustic environment in the anechoic environment has changed. If the acoustic environment change is less than or equal to a preset threshold, the standard microphone is calibrated by correcting the frequency response curve. If the acoustic environment change is greater than the preset threshold, the test is terminated and an alarm is given.

[0023] In some possible implementations, the verification of the signal system of the device under test includes:

[0024] Pure tone test: The host computer sends the measurement system test command to the main control module. The main control module controls the sound unit of the device under test to play pure tone according to the measurement system test command. The standard microphone and signal acquisition module collect the sound signal. The signal processing module performs FFT fast Fourier transform on the collected signal, reads the sound pressure level and corresponding frequency of the highest frequency point in FFT and records them automatically, and then calculates the second, third and fourth harmonics of the corresponding frequency point, and calculates the total harmonic distortion to complete the pure tone test;

[0025] Tone burst test: The host computer sends a tone burst test instruction to the main control module. The main control module controls the sound unit of the device under test to play the tone burst according to the tone burst test instruction. The standard microphone and signal acquisition module collect the sound signal. The signal processing module performs time domain analysis on the collected signal, automatically collects the maximum and minimum values ​​of the tone burst waveform, and calculates the peak-to-peak equivalent sound pressure level. The time when the tone burst is generated is compared as the ON time, and the remaining part is the OFF time. A separate FFT analysis is performed on the part with the tone burst signal to calculate the fundamental frequency and sound pressure level of the tone burst to complete the tone burst test.

[0026] Warbling test: The host computer sends a warbling test instruction to the main control module. The main control module controls the sound unit of the device under test to play the warbling sound according to the warbling test instruction. The standard microphone and the signal acquisition module collect the sound signal. The signal processing module performs a three-dimensional FFT analysis on the collected signal. According to the built-in cutoff frequency rules of the original signal and the modulated signal, the debugging depth of the warbling signal is calculated; the periodic changes of the sound pressure level of the original signal in the time domain in the three-dimensional FFT analysis are analyzed, and the debugging of the warbling signal is calculated to complete the warbling test;

[0027] Narrowband noise test: The host computer sends narrowband noise test instructions to the main control module. The main control module controls the sound unit of the device under test to play narrowband noise according to the narrowband noise test instructions. The standard microphone and signal acquisition module collect sound signals. The signal processing module performs FFT analysis on the collected signals, automatically adjusts the threshold to calculate the effective bandwidth, and calculates the transition band slope according to the maximum value position of the FFT spectrum to complete the narrowband noise test.

[0028] Random noise test: The host computer sends a random noise test command to the main control module. The main control module controls the sound unit of the device under test to play random noise according to the random noise test command. The standard microphone and signal acquisition module collect the sound signal. The signal processing module performs FFT analysis on the collected signal, automatically calculates the sound pressure level of each sampling point, and further calculates the spectrum uniformity to complete the random noise test.

[0029] ISTS signal test: The host computer sends the ISTS signal test command to the main control module. The main control module controls the sound unit of the tested equipment to play the ISTS signal according to the ISTS signal test command. The standard microphone and signal acquisition module collect the sound signal. The signal processing module measures the sound pressure level during the entire time according to the collected signal and calculates the statistics. The statistical sound pressure level is calculated to complete the ISTS signal test.

[0030] In some possible implementations, the verification of the measurement system of the device under test includes:

[0031] S201, the host computer sends a measurement system test instruction to the main control module;

[0032] S202, the main control module controls the sound unit of the device under test to play pure sound;

[0033] S203, the standard microphone and the signal acquisition module collect the pure tone signal and the signal processing module analyzes the sound pressure level and compares it with the test sound pressure level of the reference microphone and the probe microphone of the device under test;

[0034] S204, the main control module switches the frequency of the pure tone and jumps to step S202 until all preset frequency tests are completed;

[0035] S205, generating a record table for display on the host computer, wherein the record table includes the measurement accuracy of the reference microphone and the probe microphone at all frequencies based on the sound pressure level collected by the standard microphone.

[0036] In a third aspect, a computer-readable storage medium is provided, wherein the computer-readable medium stores a program code for execution by a device, wherein the program code includes steps for executing the method in any one of the implementations of the first aspect described above.

[0037] In a fourth aspect, an electronic device is provided, comprising a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements a method as in any one of the implementations in the first aspect above.

[0038] The present application has the following beneficial effects: the present application utilizes a host computer, a signal acquisition module and a signal processing module, and converts the acoustic signal into a digital electrical signal through the signal acquisition module. The signal processing module calculates the corresponding signal spectrum based on the digital electrical signal, and then calculates the performance parameters of various signals. The entire test process is automated, which not only greatly improves the verification efficiency, but also has low technical requirements for verification staff. It only needs to use the host computer to start the verification program, and it also avoids the situation where the intervention of staff during the verification process affects the acoustic environment, thereby affecting the test results, making the verification results more stable and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 is a result block diagram of the system for automatically calibrating the real ear test equipment according to Example 1 of the present application;

[0042] Figure 2 is a flow chart of a method for automatically calibrating a real ear test device according to Embodiment 2 of the present application;

[0043] Figure 3is a flow chart of signal system verification in the method for automatically verifying a real ear test device according to Embodiment 2 of the present application;

[0044] Figure 4 is a flow chart of the measurement system calibration in the method for automatically calibrating a real ear test device according to Embodiment 2 of the present application;

[0045] Figure 5 It is a schematic diagram of the internal structure of the electronic device of Example 4 of the present application.

[0046] Reference numerals:

[0047] 100, main control module; 200, signal processing module; 300, signal acquisition module; 400, standard microphone; 500, host computer; 600, device under test; 601, reference microphone; 602, probe microphone; 603, sound generating unit; 700, communication module. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] Example 1

[0050] like Figure 1 As shown, the lower system of an automatic calibration real ear test device involved in Example 1 of the present application includes: a main control module 100, which is used to control the device under test 600 according to the test instructions of the host computer 500, collect data of the device under test 600, control the signal processing module 200 and collect the analysis results of the signal processing module 200; the signal processing module 200 is used to record and analyze the signal collected by the signal acquisition module 300; the signal acquisition module 300 is used to convert the sound signal collected by the standard microphone 400 into an electrical signal and perform filtering and amplification processing; the standard microphone 400 is used to collect the required sound signal; the host computer 500 is used to issue test instructions and display test information.

[0051] It should be noted that the device under test 600 is a real ear test device, which has a reference microphone 601, a probe microphone 602 and a sound generating unit 603, wherein the reference microphone 601 is a microphone used for benchmark comparison in the real ear test device. The probe microphone 602 is a microphone used for testing ear canal response in the real ear test device. The sound generating unit 603 is used to play various test sounds.

[0052] In this embodiment, the standard microphone 400 is connected to the signal acquisition module 300, the standard microphone 400 can transmit the sound signal to be collected to the signal acquisition module 300, the signal acquisition module 300 is electrically connected to the signal processing module 200, the signal acquisition module 300 converts the signal collected by the standard microphone 400 into a digital electrical signal and performs filtering and amplification processing, the signal processing module 200 is electrically connected to the main control module 100, the signal processing module 200 records and analyzes the collected signal, the main control module 100 communicates with the host computer 500 through the communication module 700, wherein the communication module 700 can be a wireless communication such as a Bluetooth module, a wifi module, or a wired communication such as a signal line, and the host computer 500 can send a signal to the main control module 100 through the communication module 700. Send test instructions, wherein the test instructions include measurement system test instructions, burst tone test instructions, warbling tone test instructions, narrowband noise test instructions, random noise test instructions, ISTS test instructions and measurement system test instructions. The main control module 100 can control the generating unit of the device under test 600 to send corresponding sound signals according to the instructions, wherein the signals include pure tones, burst tones, warbling tones, narrowband noise, random noise and ISTS signals. The sound signals are collected by the standard microphone 400 and the signal acquisition unit, converted into digital electrical signals, filtered and amplified, and finally the signal processing module 200 records and analyzes the amplified digital electrical signals, thereby automatically completing the calibration of the device under test 600. The main control module 100 obtains the calibration results and feeds them back to the host computer 500 through the communication module 700 for display.

[0053] This embodiment utilizes a host computer 500, a signal acquisition module 300, and a signal processing module 200. The signal acquisition module 300 converts the acoustic signal into a digital electrical signal. The signal processing module 200 calculates the corresponding signal spectrum according to the digital electrical signal, and then calculates the performance parameters of various signals. The entire test process is automated, which not only greatly improves the verification efficiency, but also during the verification process, only the main control module 100, the signal processing module 200, the signal acquisition module 300, the standard microphone 400, and the device under test 600 need to be placed in a soundproofing environment, such as a soundproofing room, a soundproofing box, etc., and the host computer 500 can be placed outside the soundproofing room or the soundproofing box, and the staff can operate it, issue test instructions, and view the verification results. The technical requirements for the verification staff are low, and it is only necessary to use the host computer 500 to start the verification program. It also avoids the situation where the intervention of the staff during the verification process affects the acoustic environment and then affects the test results, making the verification results more stable and accurate.

[0054] Example 2

[0055] like Figure 2As shown, a method for automatically calibrating a real ear test device according to Example 2 of the present application includes a device as in any one of the implementations in Example 1, and the method includes:

[0056] S100, obtaining a first test instruction, so that the main control module 100 controls the sound unit 603 of the device under test 600 to emit a sound according to the first test instruction, and the standard microphone 400 collects the sound signal, and the collected sound signal is converted into an electrical signal by the signal acquisition module 300 and filtered and amplified, and then analyzed by the signal processing module 200, so as to complete the verification of the signal system of the device under test 600;

[0057] Among them, the first test instruction is used to test the test signal system, specifically including: ① the sound pressure level of pure tone signals, frequency accuracy and harmonic distortion, fundamental frequency of burst tone, ON and OFF time, sound pressure level during playback, warbling modulation depth and modulation rate, effective bandwidth of narrowband noise, transition band slope, peak factor and spectral uniformity of random noise and statistical sound level of the International Speech Test Signal (ISTS).

[0058] Before testing, the main control module 100, the signal processing module 200, the signal acquisition module 300, the standard microphone 400 and the device under test 600 are placed in a sound-proof environment and connected in the manner of Example 1. The pickup hole of the probe microphone 602 of the device under test 600 is fixed to the pickup hole of the reference microphone 601, and the standard microphone 400 is placed close to the pickup hole of the probe microphone 602.

[0059] In order to ensure the accuracy of the test results, before each test, the sound unit 603 of the device under test 600 is controlled to play a swept frequency sound. The standard microphone 400 collects the signal of the swept frequency sound to determine whether the acoustic environment in the room has changed. When the acoustic environment changes slightly, the built-in frequency response curve is corrected. When the deviation is too large, the room calibration fails and the test ends.

[0060] like Figure 3 As shown, the verification of the signal system of the device under test 600 includes:

[0061] Pure tone test: The host computer 500 sends a measurement system test instruction to the main control module 100. The main control module 100 controls the sound unit 603 of the device under test 600 to play pure tone according to the measurement system test instruction. The standard microphone 400 and the signal acquisition module 300 collect sound signals. The signal processing module 200 performs FFT fast Fourier transform on the collected signals, reads the sound pressure level and corresponding frequency of the highest frequency point in the FFT and records them automatically, and then calculates the second, third and fourth harmonics of the corresponding frequency points, and calculates the total harmonic distortion to complete the pure tone test;

[0062] Tone burst test: the upper computer 500 sends a tone burst test instruction to the main control module 100, and the main control module 100 controls the sound unit 603 of the device under test 600 to play the tone burst according to the tone burst test instruction, and the standard microphone 400 and the signal acquisition module 300 collect the sound signal, and the signal processing module 200 performs time domain analysis on the collected signal, automatically collects the maximum and minimum values ​​of the tone burst waveform, and calculates the peak-to-peak equivalent sound pressure level; compares the time when the tone burst is generated as the ON time, and the remaining part as the OFF time; performs a separate FFT analysis on the part of the tone burst signal, and calculates the fundamental frequency and sound pressure level of the tone burst to complete the tone burst test;

[0063] Warbling test: The host computer 500 sends a warbling test instruction to the main control module 100. The main control module 100 controls the sound unit 603 of the device under test 600 to play the warbling sound according to the warbling test instruction. The standard microphone 400 and the signal acquisition module 300 collect the sound signal. The signal processing module 200 performs a three-dimensional FFT analysis on the collected signal, and calculates the debugging depth of the warbling signal according to the built-in cutoff frequency rules of the original signal and the modulated signal; analyzes the periodic changes of the sound pressure level of the original signal in the time domain in the three-dimensional FFT analysis, and calculates the debugging of the warbling signal to complete the warbling test;

[0064] Narrowband noise test: The host computer 500 sends a narrowband noise test instruction to the main control module 100. The main control module 100 controls the sound unit 603 of the device under test 600 to play narrowband noise according to the narrowband noise test instruction. The standard microphone 400 and the signal acquisition module 300 collect sound signals. The signal processing module 200 performs FFT analysis on the collected signals, automatically adjusts the threshold to calculate the effective bandwidth, and calculates the transition band slope according to the maximum value position of the FFT spectrum to complete the narrowband noise test.

[0065] Random noise test: The host computer 500 sends a random noise test instruction to the main control module 100. The main control module 100 controls the sound unit 603 of the device under test 600 to play random noise according to the random noise test instruction. The standard microphone 400 and the signal acquisition module 300 collect sound signals. The signal processing module 200 performs FFT analysis on the collected signals, automatically calculates the sound pressure level of each sampling point, and further calculates the spectrum uniformity to complete the random noise test.

[0066] ISTS signal test: The host computer 500 sends an ISTS signal test instruction to the main control module 100. The main control module 100 controls the sound unit 603 of the device under test 600 to play the ISTS signal according to the ISTS signal test instruction. The standard microphone 400 and the signal acquisition module 300 collect the sound signal. The signal processing module 200 measures the sound pressure level during the entire time according to the collected signal and calculates the statistics. The sound pressure level is calculated to complete the ISTS signal test.

[0067] S200, obtaining a second test instruction so that the main control module 100 controls the sound unit 603 of the device under test 600 to emit a sound according to the first test instruction. After the sound is calibrated to a target value through the standard microphone 400, the host computer 500 reads and analyzes the sound pressure levels of the probe microphone 602 and the reference microphone 601 of the device under test 600 through the main control module 100 to complete the calibration of the measurement system of the device under test.

[0068] like Figure 4 As shown, the verification of the measurement system of the device under test 600 includes:

[0069] S201, the host computer 500 sends a measurement system test instruction to the main control module 100;

[0070] S202, the main control module 100 controls the sound unit 603 of the device under test 600 to play pure sound;

[0071] S203, the standard microphone 400 and the signal acquisition module 300 collect the pure tone signal and the signal processing module 200 analyzes the sound pressure level and compares it with the test sound pressure level of the reference microphone 601 and the probe microphone 602 of the device under test 600;

[0072] S204, the main control module 100 switches the frequency of the pure tone and jumps to step S202 until all preset frequency tests are completed;

[0073] S205 , generating a record table for display on the host computer 500 , wherein the record table includes the measurement accuracy of the reference microphone 601 and the probe microphone 602 at all frequencies based on the sound pressure level collected by the standard microphone 400 .

[0074] It should be noted that other specific implementations of the method for automatically calibrating a real ear test device in this embodiment can refer to the specific implementations of the method for automatically calibrating a real ear test device mentioned above, and will not be repeated here to avoid redundancy.

[0075] Example 3

[0076] A computer-readable storage medium involved in Embodiment 3 of the present application, the computer-readable storage medium stores a program code for execution by a device, the program code including steps for executing a method in any one of the implementations in Embodiment 1 of the present application;

[0077] Among them, the computer-readable storage medium can be a read-only memory (ROM), a static storage device, a dynamic storage device or a random access memory (RAM); the computer-readable storage medium can store program code, and when the program stored in the computer-readable storage medium is executed by the processor, the processor is used to execute the steps of the method in any one of the implementation methods in Example 1 of the present application.

[0078] Example 4

[0079] like Figure 5 As shown, an electronic device involved in Embodiment 4 of the present application includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, and when the program or instruction is executed by the processor, a method in any one of the implementations in Embodiment 1 of the present application is implemented;

[0080] Among them, the processor can adopt a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), a graphics processing unit (GPU) or one or more integrated circuits to execute relevant programs to implement the method in any one of the implementation methods in Example 1 of the present application.

[0081] The processor may also be an integrated circuit electronic device with signal processing capability. In the implementation process, each step of the method in any implementation of Embodiment 1 of the present application may be completed by an integrated logic circuit of hardware in the processor or by instructions in software form.

[0082] The above-mentioned processor may also be a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed by a hardware decoding processor, or may be executed by a combination of hardware and software modules in a decoding processor. The software module may be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in a memory, and the processor reads the information in the memory, and completes the functions required to be performed by the unit included in the data processing device of the embodiment of the present application in combination with its hardware, or executes the method in any one of the implementation modes in the embodiment 1 of the present application.

[0083] The above are only preferred specific implementations of the present application; however, the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved ideas of the present application within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A method for automatically calibrating a real ear test device, comprising a system, wherein the system comprises a main control module, a signal processing module, a signal acquisition module, a standard microphone and a host computer, wherein: The main control module is used to control the device under test according to the test instructions of the host computer, collect data of the device under test, control the signal processing module, and collect the analysis results of the signal processing module; A signal processing module is used to record and analyze the signals collected by the signal collection module; A signal acquisition module is used to convert the acoustic signal collected by the standard microphone into an electrical signal and perform filtering and amplification processing; Standard microphone, used to collect the required sound signals; The host computer is used to issue test instructions and display test information, characterized in that the main control module, the signal processing module, the signal acquisition module, the standard microphone and the device under test are in a silencing environment, the pickup hole of the probe tube microphone of the device under test is fixed to the pickup hole of the reference microphone, and the standard microphone is close to the pickup hole of the probe tube microphone, and the method includes: Obtaining a first test instruction, so that the main control module controls the sound unit of the device under test to emit a sound according to the first test instruction, and the sound signal is collected by the standard microphone. The collected sound signal is converted into an electrical signal by the signal acquisition module and filtered and amplified, and then analyzed by the signal processing module to complete the verification of the signal system of the device under test; Obtain a second test instruction so that the main control module controls the sound unit of the device under test to emit a sound according to the second test instruction. After the sound is calibrated to a target value through a standard microphone, the host computer reads and analyzes the sound pressure levels of the probe microphone and the reference microphone of the device under test through the main control module to complete the calibration of the measurement system of the device under test; Among them, the verification of the signal system of the equipment under test includes: Pure tone test: The host computer sends the measurement system test command to the main control module. The main control module controls the sound unit of the device under test to play pure tone according to the measurement system test command. The standard microphone and signal acquisition module collect the sound signal. The signal processing module performs FFT fast Fourier transform on the collected signal, reads the sound pressure level and corresponding frequency of the highest frequency point in FFT and records them automatically, and then calculates the second, third and fourth harmonics of the corresponding frequency point, and calculates the total harmonic distortion to complete the pure tone test; Tone burst test: The host computer sends a tone burst test instruction to the main control module. The main control module controls the sound unit of the device under test to play the tone burst according to the tone burst test instruction. The standard microphone and signal acquisition module collect the sound signal. The signal processing module performs time domain analysis on the collected signal, automatically collects the maximum and minimum values ​​of the tone burst waveform, and calculates the peak-to-peak equivalent sound pressure level. The time when the tone burst is generated is compared as the ON time, and the remaining part is the OFF time. A separate FFT analysis is performed on the part with the tone burst signal to calculate the fundamental frequency and sound pressure level of the tone burst to complete the tone burst test. Warbling test: The host computer sends a warbling test instruction to the main control module. The main control module controls the sound unit of the device under test to play the warbling sound according to the warbling test instruction. The standard microphone and the signal acquisition module collect the sound signal. The signal processing module performs a three-dimensional FFT analysis on the collected signal. According to the built-in cutoff frequency rules of the original signal and the modulated signal, the debugging depth of the warbling signal is calculated; the periodic changes of the sound pressure level of the original signal in the time domain in the three-dimensional FFT analysis are analyzed, and the debugging of the warbling signal is calculated to complete the warbling test; Narrowband noise test: The host computer sends narrowband noise test instructions to the main control module. The main control module controls the sound unit of the device under test to play narrowband noise according to the narrowband noise test instructions. The standard microphone and signal acquisition module collect sound signals. The signal processing module performs FFT analysis on the collected signals, automatically adjusts the threshold to calculate the effective bandwidth, and calculates the transition band slope according to the maximum value position of the FFT spectrum to complete the narrowband noise test. Random noise test: The host computer sends a random noise test command to the main control module. The main control module controls the sound unit of the device under test to play random noise according to the random noise test command. The standard microphone and signal acquisition module collect the sound signal. The signal processing module performs FFT analysis on the collected signal, automatically calculates the sound pressure level of each sampling point, and further calculates the spectrum uniformity to complete the random noise test. ISTS signal test: The host computer sends the ISTS signal test command to the main control module. The main control module controls the sound unit of the tested equipment to play the ISTS signal according to the ISTS signal test command. The standard microphone and signal acquisition module collect the sound signal. The signal processing module measures the sound pressure level during the entire time according to the collected signal and calculates the statistics. The statistical sound pressure level is calculated to complete the ISTS signal test.

2. The method for automatically calibrating a real ear test device according to claim 1, characterized in that: Before the host computer issues the first test command or the second test command each time, a sweep frequency sound is played, and the signal of the sweep frequency sound is collected by the standard microphone to determine whether the acoustic environment in the anechoic environment has changed. If the acoustic environment change is less than or equal to the preset threshold, the standard microphone is calibrated by correcting the frequency response curve. If the acoustic environment change is greater than the preset threshold, the test is terminated and an alarm is issued.

3. The method for automatically calibrating a real ear test device according to claim 1 or 2, characterized in that: The verification of the measurement system of the equipment under test includes: S201, the host computer sends a measurement system test instruction to the main control module; S202, the main control module controls the sound unit of the device under test to play pure sound; S203, the standard microphone and the signal acquisition module collect the pure tone signal and the signal processing module analyzes the sound pressure level and compares it with the test sound pressure level of the reference microphone and the probe microphone of the device under test; S204, the main control module switches the frequency of the pure tone and jumps to step S202 until all preset frequency tests are completed; S205, generating a record table for display on the host computer, wherein the record table includes the measurement accuracy of the reference microphone and the probe microphone at all frequencies based on the sound pressure level collected by the standard microphone.

4. The method for automatically calibrating a real ear test device according to claim 1, characterized in that: The system also includes: a communication module, which is used to realize the communication between the main control module and the host computer.

5. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program code for execution by a device, wherein the program code includes steps for executing the method according to any one of claims 1 to 4.

6. An electronic device, characterized in that: The electronic device comprises a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction implements the method as claimed in any one of claims 1 to 4 when executed by the processor.

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