Headphone Microphone Frequency Response Calibration System and Device

Abstract

This disclosure provides a headphone microphone frequency response curve calibration system and apparatus. The system includes a host module, a speaker module, a headphone module, and a data acquisition amplifier module. The host module includes a frequency response acquisition unit, a frequency response preset unit, an interval preset unit, a comparison calculation unit, and a comparison transmission unit. The headphone microphone frequency response curve calibration system acquires the frequency response curves of a test headphone and a headphone prototype, calculates the difference between their frequency response curves, and writes the difference value into the chip of the test headphone when the difference value is outside the difference interval to compensate for the frequency response difference between the test headphone and the headphone prototype. This significantly improves the consistency and first-pass yield of the headphone's frequency response curve. Thus, when the consistency problem of the headphone's microphone frequency response curve is minor, it can be used normally without forced disassembly; frequency response calibration is all that's needed.

Description

Technical Field

[0001] This disclosure relates to the field of headphone testing technology, and in particular to a headphone microphone frequency response curve calibration system and apparatus thereof. Background Technology

[0002] The consistency of the microphone frequency response curve is crucial for headphones in multiple dimensions, including noise cancellation performance, sound quality, user experience, product reliability, and brand competitiveness. It affects the consistency of ENC (Environmental Noise Cancellation) / ANC (Active Noise Cancellation) noise reduction effects. If there is poor consistency in the frequency response curve, it will affect the noise reduction effect of the headphones. For example, the noise reduction effect of the two headphones may be inconsistent, making the user perceive it as "noisy on one side and quiet on the other"; wind noise suppression may fail on one side of the headphone; low frequency attenuation may be severe on one side of the headphone; and audio distortion may occur on one side of the headphone.

[0003] Replacing either the left or right earbud requires retesting the entire pair, which lengthens the overall testing time and reduces replacement efficiency. When the frequency response inconsistency of the TWS earbuds' microphones is minor, their unique structure prevents non-destructive disassembly, necessitating forceful disassembly. Forceful disassembly easily causes irreversible damage to the delicate and tightly connected internal components, rendering most of these components unusable and significantly increasing repair costs. Utility Model Content

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a headphone microphone frequency response curve calibration system and apparatus that can effectively calibrate headphones with minor frequency response curve consistency issues without the need for forced disassembly.

[0005] The purpose of this disclosure is achieved through the following technical solution:

[0006] A headphone microphone frequency response curve calibration system includes a host module, a speaker module, a headphone module, and a data acquisition amplifier module. The communication terminal of the host module is electrically connected to the transceiver terminal of the data acquisition amplifier module. The sound output terminal of the headphone module is communicatively connected to the receiving terminal of the speaker module. One communication signal terminal of the data acquisition amplifier module is electrically connected to the data interaction terminal of the speaker module, and the other communication signal terminal of the data acquisition amplifier module is electrically connected to the control terminal of the headphone module.

[0007] The host module includes a frequency response acquisition unit, a frequency response preset unit, an interval preset unit, a comparison calculation unit, and a comparison transmission unit. The acquisition end of the frequency response acquisition unit is electrically connected to the data output end of the acquisition power amplifier module. The storage end of the frequency response preset unit is electrically connected to the storage output end of the frequency response acquisition unit. The storage end of the interval preset unit is electrically connected to the interval setting end of the frequency response preset unit. The comparison one end of the comparison calculation unit is electrically connected to the numerical comparison output end of the frequency response acquisition unit. The comparison two end of the comparison calculation unit is electrically connected to the numerical comparison output end of the frequency response preset unit. The comparison three end of the comparison calculation unit is electrically connected to the interval comparison output end of the interval preset unit. The numerical acquisition end of the comparison transmission unit is electrically connected to the difference output end of the comparison calculation unit. The difference transmission end of the comparison transmission unit is communicatively connected to the numerical communication receiving end of the headphone module.

[0008] In one embodiment, the headphone microphone frequency response curve calibration system further includes a shielding box, in which the speaker module and the headphone module are disposed.

[0009] In one embodiment, the headphone microphone frequency response curve calibration system further includes a Bluetooth module, wherein the transceiver end of the Bluetooth module is electrically connected to the Bluetooth communication end of the host module, and the communication interaction end of the Bluetooth module is communicatively connected to the communication interaction end of the headphone module.

[0010] In one embodiment, the Bluetooth module is disposed inside the shielded box.

[0011] In one embodiment, the comparison and transmission unit includes a primary comparison unit, a primary transmission unit, and a secondary comparison unit. The value acquisition terminal of the primary comparison unit is electrically connected to one end of the difference output of the comparison calculation unit. The transmission enable terminal of the primary transmission unit is electrically connected to the result output terminal of the primary comparison unit. The difference transmission terminal of the primary transmission unit is communicatively connected to the value communication receiving terminal of the earphone module. The value acquisition terminal of the secondary comparison unit is electrically connected to both ends of the difference output of the comparison calculation unit.

[0012] In one embodiment, the comparison calculation unit includes a first comparison calculation unit and a second comparison calculation unit. The comparison terminal of the first comparison calculation unit is electrically connected to the numerical comparison output terminal of the frequency response acquisition unit. The comparison terminal of the first comparison calculation unit is electrically connected to the numerical comparison output terminal of the frequency response preset unit. The comparison terminal of the first comparison calculation unit is electrically connected to the interval comparison output terminal of the interval preset unit. The difference output terminal of the first comparison calculation unit is electrically connected to the numerical acquisition terminal of the first comparison unit.

[0013] In one embodiment, the comparison terminal of the second comparison calculation unit is electrically connected to the numerical comparison output terminal of the frequency response acquisition unit, the comparison terminal of the second comparison calculation unit is electrically connected to the numerical comparison output terminal of the frequency response preset unit, and the difference output terminal of the second comparison calculation unit is electrically connected to the numerical acquisition terminal of the secondary comparison unit.

[0014] In one embodiment, the headphone module is a test headphone or a headphone prototype.

[0015] In one embodiment, the host module is a test host computer.

[0016] In one embodiment, the acquisition amplifier module is a sound card amplifier acquisition all-in-one machine.

[0017] A headphone microphone frequency response curve calibration device includes the headphone microphone frequency response curve calibration system described in any one of the above embodiments.

[0018] Compared with the prior art, this disclosure has at least the following advantages:

[0019] The aforementioned headphone microphone frequency response curve calibration system obtains the frequency response curves of the test headphone and the headphone prototype, calculates the difference between the frequency response curves of the test headphone and the headphone prototype, and writes the difference value into the chip of the test headphone when the difference value is outside the difference range to compensate for the frequency response difference between the test headphone and the headphone prototype. This can greatly improve the consistency of the frequency response curve of the test headphone and the first-pass yield of the frequency response curve. In this way, when the consistency problem of the microphone frequency response curve of the headphone is relatively minor, there is no need to forcibly disassemble the device; it can be used normally simply by frequency response calibration. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a module for calibrating the frequency response curve of an earphone microphone in one embodiment;

[0022] Figure 2 for Figure 1 The diagram shows the specific module schematic of the headphone microphone frequency response curve calibration system.

[0023] Figure 3 for Figure 1 The diagram shown illustrates the working principle of the headphone / microphone frequency response calibration system.

[0024] Figure 4 for Figure 3 The diagram shows the working principle of the headphone microphone frequency response calibration system in another embodiment.

[0025] Figure 5 for Figure 4 The diagram shows the working principle of the headphone microphone frequency response calibration system in another embodiment.

[0026] Figure 6 for Figure 1 Workflow diagram of the headphone microphone frequency response curve calibration system;

[0027] Figure 7 for Figure 1 The working logic flowchart of the headphone microphone frequency response curve calibration system.

[0028] Reference numerals in the attached figures: 10, Headphone / Microphone Frequency Response Curve Calibration System; 100, Host Module; 110, Frequency Response Acquisition Unit; 120, Frequency Response Preset Unit; 130, Interval Preset Unit; 140, Comparison Calculation Unit; 141, First Comparison Calculation Unit; 142, Second Comparison Calculation Unit; 150, Comparison Transmission Unit; 151, First Comparison Unit; 152, First Transmission Unit; 153, Second Comparison Unit; 200, Speaker Module; 300, Headphone Module; 400, Acquisition Amplifier Module; 500, Shielding Box; 600, Bluetooth Module. Detailed Implementation

[0029] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:

[0033] Please see Figure 1 and Figure 6 This invention relates to a headphone microphone frequency response curve calibration system 10, which includes a host module 100, a speaker module 200, a headphone module 300, and a data acquisition amplifier module 400. The communication end of the host module 100 is electrically connected to the transceiver end of the data acquisition amplifier module 400. The sound output end of the headphone module 300 is communicatively connected to the receiving end of the speaker module 200. One communication signal end of the data acquisition amplifier module 400 is electrically connected to the data interaction end of the speaker module 200, and the other communication signal end of the data acquisition amplifier module 400 is electrically connected to the controlled end of the headphone module 300.

[0034] Combination Figure 2 and Figure 3 As shown, the host module 100 includes a frequency response acquisition unit 110, a frequency response preset unit 120, an interval preset unit 130, a comparison calculation unit 140, and a comparison transmission unit 150. The acquisition end of the frequency response acquisition unit 110 is electrically connected to the data output end of the acquisition power amplifier module 400. The storage end of the frequency response preset unit 120 is electrically connected to the storage output end of the frequency response acquisition unit 110. The storage end of the interval preset unit 130 is electrically connected to the interval setting end of the frequency response preset unit 120. The comparison one end of the comparison calculation unit 140 is electrically connected to the numerical comparison output end of the frequency response acquisition unit 110. The comparison two end of the comparison calculation unit 140 is electrically connected to the numerical comparison output end of the frequency response preset unit 120. The comparison three end of the comparison calculation unit 140 is electrically connected to the interval comparison output end of the interval preset unit 130. The numerical acquisition end of the comparison transmission unit 150 is electrically connected to the difference output end of the comparison calculation unit 140. The difference transmission end of the comparison transmission unit 150 is communicatively connected to the numerical communication receiving end of the headphone module 300.

[0035] The frequency response acquisition unit 110 is used to acquire the reference frequency response curve value of the headphone prototype, and sequentially acquire the frequency response curve value before calibration and the frequency response curve value after calibration of the test headphone. The frequency response preset unit 120 is used to store the reference frequency response curve value, that is, to acquire the reference frequency response curve value of the headphone prototype. The interval preset unit 130 is used to set the frequency response interval according to the distribution of the reference frequency response curve value. The comparison calculation unit 140 is used to determine whether the frequency response curve value before calibration is within the frequency response interval, and to perform a subtraction calculation between the frequency response curve value before calibration and the reference frequency response curve value to obtain a first difference value, and to perform a subtraction calculation between the frequency response curve value after calibration and the reference frequency response curve value to obtain a second difference value. The comparison sending unit 150 is used to compare the first difference value with the preset difference value interval to confirm whether the first difference value is written into the chip of the test headphone, and to compare the second difference value with the preset difference value interval to confirm the output result value.

[0036] It can be understood that the aforementioned reference frequency response curve value is the reference average value of the headphone prototype's mid-frequency response at each frequency. The frequency response interval is the upper and lower limit interval set according to the average value of the headphone prototype's curve distribution at each frequency, so as to determine whether the mid-frequency response value of the test headphone at each frequency is within the corresponding upper and lower limit interval. The frequency response curve before calibration is the average value of the test headphone's mid-frequency response at each frequency before calibration, and the frequency response curve after calibration is the average value of the test headphone's mid-frequency response at each frequency after calibration. The preset difference interval is set through host operation so that the system can perform difference compensation on the headphone based on whether the average value before calibration is within the preset difference interval, and confirm the calibration result based on whether the average value after calibration is within the preset difference interval.

[0037] In this embodiment, a prototype earphone is first connected, and its frequency response curve is tested. The frequency response curve data is uploaded to the host computer through a data acquisition process. The corresponding frequency response curve is then saved as a reference frequency response curve. Based on the distribution of this curve, upper and lower limits for the reference frequency response are set, and the reference average value is also calculated. Figure 7As shown, the test headphones are connected at this point, and a frequency response curve test is performed on the test headphones. The sound outlet of the test headphones is directly opposite the sound source of the speaker so that the power amplifier module 400 can collect the curve distribution and obtain the corresponding information from the frequency response acquisition unit 110 in the host, that is, to obtain the average value before calibration. Then, it is determined whether the curve value of each frequency before calibration is within the corresponding upper and lower limit range. If it is outside the upper and lower limit range, the test fails; otherwise, the next calibration step is performed: the average value before calibration is subtracted from the reference average value to obtain the first difference value. Then, it is confirmed whether the first difference value is within the preset difference value range. If it is within the preset difference value range, calibration is not performed and the test passes; otherwise, the first difference value is written into the chip of the test headphones to calibrate the curve parameters of the headphones. Subsequently, the host obtains the average value after calibration again, subtracts the average value after calibration from the reference average value to obtain the second difference value, and then confirms whether the second difference value is within the preset difference value range. If it is within the preset difference value range, the calibration is completed; otherwise, the test ends and the calibration fails. For example, if the preset difference range is set to (-0.7, 0.3), the obtained baseline average value is 100, the average value obtained by the test headphones before calibration is 100.2, and the calculated first difference value is 0.2. This difference value is within the preset difference range, so no calibration is performed.

[0038] Furthermore, the distance between the sound outlet of the test headphones and the sound source of the speaker should be 40mm-50mm, preferably 45mm.

[0039] Further, the calibration steps involve calibrating the headphone's FF (feedforward noise cancellation), FB (feedback noise cancellation), Talk (call mode), and VPU (voice pickup unit) parameters.

[0040] The aforementioned headphone microphone frequency response curve calibration system 10 obtains the frequency response curves of the test headphone and the headphone prototype, calculates the difference between the frequency response curves of the test headphone and the headphone prototype, and writes the difference value into the chip of the test headphone when the difference value is outside the difference range to compensate for the frequency response difference between the test headphone and the headphone prototype. This can greatly improve the consistency of the frequency response curve of the test headphone and the first-pass yield of the frequency response curve. In this way, when the consistency problem of the microphone frequency response curve of the headphone is relatively minor, there is no need to forcibly disassemble the device; it can be used normally simply by frequency response calibration.

[0041] like Figure 1 and Figure 2As shown, in one embodiment, the headphone microphone frequency response curve calibration system 10 further includes a shielding box 500, with the speaker module 200 and headphone module 300 disposed within the shielding box 500. It can be understood that the frequency response curve calibration of the headphones is performed in an environment located inside the shielding box 500. During testing, the host issues a command, and the shielding box 500 closes to create an independent electromagnetic environment. When the sound outlet of the test headphones is directly opposite the speaker source, an acoustic signal is emitted. This acoustic signal is unlikely to leak from the shielding box 500 and can be accurately acquired by the host to generate the corresponding frequency response curve distribution. During this process, external signals are unlikely to enter the internal environment through the shielding box 500, thus preventing interference from external signals during frequency response curve acquisition and calibration, ensuring the reliability of the headphone frequency response microphone calibration. Furthermore, the shielding box 500 is used to absorb and reflect external electromagnetic interference signals or radio frequency interference signals.

[0042] like Figure 1 and Figure 2 As shown, in one embodiment, the headphone microphone frequency response curve calibration system 10 further includes a Bluetooth module 600. The transceiver end of the Bluetooth module 600 is electrically connected to the Bluetooth communication end of the host module 100, and the communication interaction end of the Bluetooth module 600 is communicatively connected to the communication interaction end of the headphone module 300. In this embodiment, after the host connects to the Bluetooth module 600, it can automatically search for nearby Bluetooth headphones. After the Bluetooth headphones are paired with the Bluetooth module 600, communication between the Bluetooth headphones and the host can be established. During this process, when testing the Bluetooth headphones, their sound output port is directly facing the speaker's sound source. At this time, the host can obtain the corresponding frequency response curve based on the internal signal state. Thus, the Bluetooth module 600 is configured to transmit signals between the Bluetooth headphones and the speaker, enabling the host to obtain test information. Specifically, the frequency response curve of the Bluetooth headphones is obtained by the acquisition amplifier module 400 from the host module 100. Furthermore, the Bluetooth module 600 is housed inside the shielding box 500 to ensure that the Bluetooth headset can establish a communication connection with the Bluetooth module 600 inside the shielding box 500, thereby ensuring signal transmission between the Bluetooth headset and the speaker and making it less susceptible to interference from external signals.

[0043] Combination Figure 2 and Figure 4As shown, in one embodiment, the comparison sending unit 150 includes a primary comparison unit 151, a primary sending unit 152, and a secondary comparison unit 153. The value acquisition terminal of the primary comparison unit 151 is electrically connected to one end of the difference output of the comparison calculation unit 140. The sending enable terminal of the primary sending unit 152 is electrically connected to the result output terminal of the primary comparison unit 151. The difference sending terminal of the primary sending unit 152 is communicatively connected to the value communication receiving terminal of the earphone module 300. The value acquisition terminal of the secondary comparison unit 153 is electrically connected to both ends of the difference output of the comparison calculation unit 140. In this embodiment, the primary comparison unit 151 is used to compare a first difference with a preset difference interval. The primary sending unit 152 is used to write the first difference into the chip of the test earphone according to the comparison result of the first difference and the preset difference interval. The secondary comparison unit 153 is used to compare a second difference with a preset difference interval and output the test result according to the comparison result of the second difference and the preset difference interval. Specifically, after obtaining the first difference by subtracting the pre-calibration frequency response curve value from the reference frequency response curve value, the difference is sent to the primary comparison unit 151. The primary comparison unit 151 determines whether the first difference is within a preset difference range. If it is within the preset difference range, calibration is not performed and the test passes. Otherwise, the difference is written to the chip of the test earphone by the primary transmission unit 152 and the frequency response curve is obtained again. After obtaining the second difference by subtracting the post-calibration frequency response curve value from the reference frequency response curve value, the difference is sent to the secondary comparison unit 153. The secondary comparison unit 153 determines whether the second difference is within a preset difference range. If it is within the preset difference range, calibration is successful; otherwise, calibration fails.

[0044] Combination Figure 2 , Figure 4 and Figure 5As shown, the comparison calculation unit 140 further includes a first comparison calculation unit 141 and a second comparison calculation unit 142. The comparison terminal of the first comparison calculation unit 141 is electrically connected to the numerical comparison output terminal of the frequency response acquisition unit 110. The comparison terminal of the first comparison calculation unit 141 is electrically connected to the numerical comparison output terminal of the frequency response preset unit 120. The comparison terminal of the first comparison calculation unit 141 is electrically connected to the interval comparison output terminal of the interval preset unit 130. The difference output terminal of the first comparison calculation unit 141 is electrically connected to the numerical acquisition terminal of the primary comparison unit 151. In this embodiment, before calibrating the test headphones, the first comparison calculation unit 141 first determines whether the frequency response curve value before calibration is within the frequency response range. If it is within the frequency response range, the frequency response curve value before calibration is subtracted from the reference frequency response curve value to obtain a first difference. This difference is then sent to the primary comparison unit 151, so that the primary comparison unit 151 performs calibration based on whether the first difference is within a preset difference range. Specifically, if the first difference is within the preset difference range, it is written into the chip of the test headphones through the primary transmission unit 152; otherwise, calibration is not performed. This ensures the reliability of the headphone test. In another embodiment, if the frequency response curve value before calibration is outside the frequency response range, a test end signal is output, and the test fails.

[0045] like Figure 5 As shown, further, one comparison terminal of the second comparison calculation unit 142 is electrically connected to the two numerical comparison output terminals of the frequency response acquisition unit 110, the other two comparison terminals of the second comparison calculation unit 142 are electrically connected to the two numerical comparison output terminals of the frequency response preset unit 120, and the difference output terminal of the second comparison calculation unit 142 is electrically connected to the numerical acquisition terminal of the secondary comparison unit 153. In this embodiment, the second comparison calculation unit 142 is used to subtract the calibrated frequency response curve value from the reference frequency response curve value to obtain a second difference value, and then send the difference value to the secondary comparison unit 153 so that the secondary comparison unit 153 can determine whether the calibration test is passed based on whether the second difference value is within the preset difference value range. Specifically, if the second difference value is within the preset difference value range, the calibration test is passed; otherwise, the calibration fails.

[0046] In one embodiment, the headphone module 300 is a test headphone or headphone prototype, which is used as the test object during the initial test, and relevant parameters such as frequency response curve distribution and frequency response curve average value are used as reference points to facilitate the subsequent test process of the test headphone.

[0047] In one embodiment, the host module 100 is a test host computer. In this embodiment, the test host computer serves as the core control unit of the system. It connects to the sound card amplifier acquisition unit and Bluetooth adapter via a general interface (USB, etc.) to enable the collaborative work of various components for headphone calibration testing. Specifically, after obtaining frequency response curve data from the headphone prototype, the corresponding curve is first displayed on the display of the test host computer. Then, the curve data and average value are saved as reference values ​​for subsequent headphone tests. Subsequently, the test headphone is tested to obtain the corresponding curve data. Then, the frequency response curve of the test headphone is compared with that of the headphone prototype to confirm whether a calibration step needs to be performed. During this process, the main interface of the test host computer displays the calibration difference, calibration status, calibration test results, etc. in real time for the operator to view, thereby ensuring the reliability and authenticity of the headphone calibration.

[0048] In one embodiment, the acquisition amplifier module 400 is a sound card amplifier acquisition unit. In this embodiment, the sound card amplifier acquisition unit is used to amplify the audio signal of the speaker and the audio signal of the headphone prototype or test headphone. It is also used to acquire the frequency response data of the headphone prototype and test headphone and then display it on the host so that the operator can view the frequency response curve distribution.

[0049] This disclosure also provides a headphone microphone frequency response curve calibration device, including the headphone microphone frequency response curve calibration system 10 of any of the above embodiments.

[0050] Compared with the prior art, this disclosure has at least the following advantages:

[0051] The aforementioned headphone microphone frequency response curve calibration system 10 obtains the frequency response curves of the test headphone and the headphone prototype, calculates the difference between the frequency response curves of the test headphone and the headphone prototype, and writes the difference value into the chip of the test headphone when the difference value is outside the difference range to compensate for the frequency response difference between the test headphone and the headphone prototype. This can greatly improve the consistency of the frequency response curve of the test headphone and the first-pass yield of the frequency response curve. In this way, when the consistency problem of the microphone frequency response curve of the headphone is relatively minor, there is no need to forcibly disassemble the device; it can be used normally simply by frequency response calibration.

[0052] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A headphone microphone frequency response curve calibration system, characterized in that, It includes a host module, a speaker module, an earphone module, and a data acquisition amplifier module. The communication terminal of the host module is electrically connected to the transceiver terminal of the data acquisition amplifier module. The sound output terminal of the earphone module is communicatively connected to the receiving terminal of the speaker module. One communication signal terminal of the data acquisition amplifier module is electrically connected to the data interaction terminal of the speaker module, and the other communication signal terminal of the data acquisition amplifier module is electrically connected to the controlled terminal of the earphone module. The host module includes a frequency response acquisition unit, a frequency response preset unit, an interval preset unit, a comparison calculation unit, and a comparison transmission unit. The acquisition end of the frequency response acquisition unit is electrically connected to the data output end of the acquisition power amplifier module. The storage end of the frequency response preset unit is electrically connected to the storage output end of the frequency response acquisition unit. The storage end of the interval preset unit is electrically connected to the interval setting end of the frequency response preset unit. The comparison one end of the comparison calculation unit is electrically connected to the numerical comparison output end of the frequency response acquisition unit. The comparison two end of the comparison calculation unit is electrically connected to the numerical comparison output end of the frequency response preset unit. The comparison three end of the comparison calculation unit is electrically connected to the interval comparison output end of the interval preset unit. The numerical acquisition end of the comparison transmission unit is electrically connected to the difference output end of the comparison calculation unit. The difference transmission end of the comparison transmission unit is communicatively connected to the numerical communication receiving end of the headphone module.

2. The earphone microphone frequency response curve calibration system according to claim 1, wherein, The headphone microphone frequency response curve calibration system also includes a shielding box, and the speaker module and the headphone module are disposed inside the shielding box.

3. The earphone microphone frequency response curve calibration system according to claim 2, wherein, The headphone microphone frequency response curve calibration system also includes a Bluetooth module. The transceiver end of the Bluetooth module is electrically connected to the Bluetooth communication end of the host module, and the communication interaction end of the Bluetooth module is communicatively connected to the communication interaction end of the headphone module.

4. The earphone microphone frequency response curve calibration system according to claim 3, wherein, The Bluetooth module is located inside the shielded box.

5. The earphone microphone frequency response curve calibration system of claim 1, wherein, The comparison and transmission unit includes a primary comparison unit, a primary transmission unit, and a secondary comparison unit. The value acquisition terminal of the primary comparison unit is electrically connected to one end of the difference output of the comparison calculation unit. The transmission enable terminal of the primary transmission unit is electrically connected to the result output terminal of the primary comparison unit. The difference transmission terminal of the primary transmission unit is communicatively connected to the value communication receiving terminal of the earphone module. The value acquisition terminal of the secondary comparison unit is electrically connected to both ends of the difference output of the comparison calculation unit.

6. The earphone microphone frequency response curve calibration system according to claim 5, wherein, The comparison calculation unit includes a first comparison calculation unit and a second comparison calculation unit. The comparison terminal of the first comparison calculation unit is electrically connected to the numerical comparison output terminal of the frequency response acquisition unit. The comparison terminal of the first comparison calculation unit is electrically connected to the numerical comparison output terminal of the frequency response preset unit. The comparison terminal of the first comparison calculation unit is electrically connected to the interval comparison output terminal of the interval preset unit. The difference output terminal of the first comparison calculation unit is electrically connected to the numerical acquisition terminal of the first comparison unit. The comparison terminal of the second comparison calculation unit is electrically connected to the two numerical comparison output terminals of the frequency response acquisition unit, the comparison terminals of the second comparison calculation unit are electrically connected to the two numerical comparison output terminals of the frequency response preset unit, and the difference output terminal of the second comparison calculation unit is electrically connected to the numerical acquisition terminal of the secondary comparison unit.

7. The earphone microphone frequency response curve calibration system of claim 1, wherein, The headphone module is a test headphone or a headphone prototype.

8. The earphone microphone frequency response curve calibration system of claim 1, wherein, The host module is a test host computer.

9. The earphone microphone frequency response curve calibration system of claim 1, wherein, The acquisition amplifier module is an integrated sound card amplifier acquisition unit.

10. An earphone microphone frequency response curve calibration apparatus, characterized by, Includes the headphone microphone frequency response curve calibration system according to any one of claims 1-9.

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