CN115842992A

CN115842992A - Radio frequency interference detection method and device for ANC earphone

Info

Publication number: CN115842992A
Application number: CN202211639162.0A
Authority: CN
Inventors: 杨楚前
Original assignee: Xiamen Yealink Network Technology Co Ltd
Current assignee: Xiamen Yealink Network Technology Co Ltd
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-03-24

Abstract

The invention discloses a radio frequency interference detection method and a device for an ANC earphone, which are suitable for the ANC earphone and comprise a radio frequency module and an ANC analog link, wherein a radio frequency signal is generated by the radio frequency module and is used as an interference source of the ANC analog link; inputting a preset electric signal to be processed into the ANC analog link, so that the ANC analog link outputs an analog signal after performing signal processing on the electric signal to be processed; and sending the analog signal to external detection equipment for radio frequency interference detection, so that the external detection equipment performs signal conversion processing on the analog signal to obtain a radio frequency interference detection result. The embodiment of the invention cancels the sending and receiving of the sound signal, reduces the high requirement of related equipment on the test environment, improves the accuracy of the radio frequency interference detection, and simultaneously utilizes the ANC analog link to effectively simulate the working state of the ANC earphone interfered by the radio frequency.

Description

Radio frequency interference detection method and device for ANC earphone

Technical Field

The invention relates to the field of ANC earphone testing, in particular to a radio frequency interference detection method and device for an ANC earphone.

Background

ANC, i.e. active noise reduction, is a noise reduction technique, and is one of the methods applied to noise reduction of earphones. The noise reduction principle is that external environment noise is picked up through microphone sensors on FF and FB links, and an SPK sends out a sound signal opposite to the external environment noise through a Filter on a designed link, so that the external noise is offset to achieve the purpose of noise reduction. However, there are multiple paths on the audio frequency inside the ANC headset, and due to the existence of the radio frequency module, when the ANC headset works, the audio frequency link is easily affected, so that a single-frequency noise that can be heard by human ears is generated, and the user experience is further affected.

In the prior art, noise judgment is mostly carried out by an objective test method, a low-noise environment needs to be built on a production line, and the noise judgment is usually carried out by using a metal box with good sound insulation capability. And then build noise detection equipment and radio frequency signal transmission equipment in the sound insulation metal case, require the microphone tool of high sensitivity, low background noise requirement to noise detection equipment, radio frequency emission equipment then needs the antenna to send the operating condition of signal simulation earphone. After the environment is built, put earphone SPK end in the microphone tool of the metal box that gives sound insulation on, radio frequency transmission equipment opens and carries out normal work, closes the chamber door and snatchs the signal of noise through the microphone, passes through the sound card with the noise and converts digital signal into, demonstrates frequency characteristic behind the FFT to select the radio frequency interference noise.

However, the prior art has the disadvantages that the requirements on the test environment are strict, and the equipment requirements are high and expensive; secondly can only detect the finished product, the problem machine of screening needs extra quick-witted maintenance and review of tearing open, influences holistic efficiency.

Disclosure of Invention

The invention provides a radio frequency interference detection method and a radio frequency interference detection device for an ANC earphone, and aims to achieve the technical effects of reducing the requirement of a test environment and improving the test efficiency.

In order to solve the above technical problem, an embodiment of the present invention provides a radio frequency interference detection method for an ANC headset, which is applicable to the ANC headset, where the ANC headset includes a radio frequency module and an ANC analog link, and the radio frequency interference detection method includes:

generating a radio frequency signal by the radio frequency module to serve as an interference source of the ANC analog link;

inputting a preset electric signal to be processed into the ANC analog link, so that the ANC analog link outputs an analog signal after performing signal processing on the electric signal to be processed;

and sending the analog signal to external detection equipment for radio frequency interference detection, so that the external detection equipment performs signal conversion processing on the analog signal to obtain a radio frequency interference detection result.

In the embodiment of the invention, the radio frequency module included in the ANC earphone is used for transmitting a radio frequency signal as an interference source, the ANC analog link is controlled to receive the electric signal to be processed and process the signal to output an analog signal, and the external detection equipment is controlled to receive the analog signal to perform radio frequency interference detection so as to obtain a detection result. According to the technical scheme, the radio frequency module is used for emitting the radio frequency signal to serve as an interference source, the ANC analog link is subjected to radio frequency interference detection, the ANC analog link can be directly detected under the condition that the equivalent ANC earphone works normally and is interfered by the radio frequency signal, the signal acquired by the external detection equipment is the analog signal, compared with the prior art that a high-quality microphone jig is adopted, namely the microphone jig with high sensitivity and low background noise requirements is realized, and the sound signal of the ANC earphone is acquired, the problem that the analog signal acquired by the embodiment cannot generate signal interference is solved, the resource cost of the high-quality microphone jig is saved, and the possibility that the signal acquisition generates interference is reduced.

Meanwhile, the radio frequency module provided by the technical scheme of the invention is used as a radio frequency signal transmitter, namely an interference source, an antenna transmitting module in the ANC earphone is adopted, and a new radio frequency transmitting module is not externally accessed, so that the intervention of external test equipment is reduced, and meanwhile, the state of the earphone during testing is more fit with the state of a user during normal use, so that the testing accuracy is ensured.

Meanwhile, the signal type of the electric signal to be processed is an electric signal instead of a sound signal, so that the electric signal cannot be interfered by the external environment, a sound insulation box does not need to be built for the electric signal, and the electric signal is used as a background noise signal, so that the ANC simulation link is in a smooth state, the normal working state of the ANC earphone in a radio frequency interference environment is simulated, the resource consumption of building the sound insulation box is saved, and the radio frequency interference state of the ANC earphone is better simulated.

As a preferred example, the partial detection device performs signal conversion processing on the analog signal to obtain a radio frequency interference detection result, specifically:

the external detection equipment receives the analog signal, converts the analog signal into a digital form, outputs a time domain signal, converts the time domain signal into a frequency domain signal and sends the frequency domain signal to the PC terminal, so that the PC terminal displays the radio frequency interference detection result.

The external detection equipment provided by the embodiment of the invention receives the analog signal output by the ANC analog link, converts the analog signal into a digital form, outputs a time domain signal, and converts the time domain signal into a frequency domain signal, so that the radio frequency interference resistance of the test link can be visually displayed at a PC (personal computer) end, and a user can directly observe the radio frequency interference detection result from the PC end.

Meanwhile, the external detection equipment used in the embodiment of the invention directly collects the analog signal output by the ANC analog link without connecting the SPK end of the earphone to collect the sound signal, processes the analog signal and transmits the processed analog signal to the PC end to be displayed to the user, and simultaneously, the external detection equipment converts the time domain signal into a frequency domain signal of which the interference signal can be observed in a contrasting manner, so that the user can more intuitively see the radio frequency interference resistance of the ANC analog link at the PC end.

As a preferred example, after the ANC analog link performs signal processing on the electrical signal to be processed, the ANC analog link outputs an analog signal, specifically:

and the ANC analog link performs signal preprocessing on the electric signal to be processed, outputs a preprocessed signal, performs analog-to-digital conversion on the preprocessed signal, outputs a digital signal, performs digital-to-analog conversion on the digital signal, and outputs the analog signal.

The ANC analog link provided by the embodiment of the invention carries out signal processing on an electric signal to be processed, and the signal processing comprises three steps of signal preprocessing, analog-to-digital conversion and digital-to-analog conversion. The electric signal to be processed is subjected to signal transmission in the steps in sequence under the interference of radio frequency signals, namely, the signal flow process of an internal circuit of the ANC earphone when the ANC earphone works normally, so that a link provided by the technical scheme of the invention can be equivalent to the state of the ANC earphone when the ANC earphone works normally.

As a preferred example, the ANC analog link performs signal preprocessing on the electrical signal to be processed, and outputs a preprocessed signal, specifically:

and the ANC analog link receives the electric signal to be processed, sequentially performs power amplification and maximum signal removal on the electric signal to be processed, and outputs the preprocessed signal.

The embodiment of the invention carries out signal preprocessing on the electric signal to be processed, and the step is used for replacing the function of an FF/FB MIC device in a test link, and the function is to simulate a background noise signal when the MIC device works so that the link keeps a path state. The size and type of the signal to be processed can be set by a user according to needs, and for the above values, the user can refer to the acoustic performance characteristics of the MIC device, such as the sensitivity and SNR value of the MIC device.

And performing power amplification, maximum signal removal and other steps on the electric signal to be processed, wherein the steps are used for simulating a link of the ANC earphone, and meanwhile, the parameter setting of the steps also refers to an internal link of the ANC earphone, so that the accuracy of the test result is ensured. The power amplification step is used for amplifying the received signal, and the maximum signal removal step is used for limiting the input of the maximum signal so as to prevent the situation that the SPK response is too large due to the fact that the signal is too large.

As a preferred example, the performing analog-to-digital conversion on the preprocessed signal to output a digital signal specifically includes:

and the ANC analog link converts the preprocessed signals from an analog form to a digital form, sequentially performs signal filtering and digital amplification on the preprocessed signals converted into the digital form, and outputs the digital signals.

The embodiment of the invention carries out analog-to-digital conversion processing on the preprocessed signal, which comprises the steps of converting the preprocessed signal into a digital form and carrying out signal filtering processing and digital amplification processing on the preprocessed signal in sequence. Since the analog-to-digital conversion process first converts the preprocessed signal into digital form, the signal converted into digital form will not be interfered by the rf signal emitted by the rf module during the following transmission process.

In the embodiment of the invention, when the preprocessing signal converted into the digital form is subjected to signal filtering processing, the processing device is adjusted to the direct-through mode, so that the influence of the FF/FB filter on the interference signal can be reduced, and the transmitted signal is easier to visually show and appoint to control. The device for digital amplification processing amplifies the signal after signal filtering processing, and prevents the signal from being too small to cause the reduction of later detection accuracy. Meanwhile, in the technical scheme of the invention, two paths of signals of the FB link and the FF link are combined into one link in the signal processing process, and digital signals are mixed, so that the signals can be conveniently acquired and processed at the later stage.

As a preferred example, the performing digital-to-analog conversion processing on the digital signal to output an analog signal specifically includes:

and the ANC analog link converts the digital signal from a digital form into an analog form, performs analog amplification on the digital signal converted from the digital form into the analog form, and outputs the analog signal.

In the embodiment of the invention, the digital-to-analog conversion processing and the analog amplification processing are sequentially carried out on the digital signal, the digital-to-analog conversion processing is used for converting the digital signal into an analog form, and the analog amplification processing is used for amplifying the transmitted analog signal.

Different from the prior art that the ANC analog link outputs the analog signal to push the SPK to output the sound signal, the embodiment of the invention cancels the sound signal output of the SPK and directly outputs the analog signal, thereby reducing the purchase of additional equipment and optimizing a tested link model.

As a preferred example, after the obtaining the radio frequency interference detection result, the method further includes:

comparing the detection result with a preset up-to-standard detection result in a similarity way, if the similarity is greater than or equal to a preset first similarity, enabling the ANC analog link to reach the standard, and carrying out ANC earphone encapsulation on the ANC analog link;

and if the similarity is less than or equal to a preset second similarity, the ANC analog link does not reach the standard, and the ANC analog link needs to be returned to the factory for repair.

The embodiment of the invention also provides a method for judging the detection result to obtain the radio frequency interference resistance of the ANC analog link, which compares the similarity of the detection result and the radio frequency interference detection result of the preset standard ANC earphone, and determines whether the ANC analog link needs to be repaired or packaged into a finished product according to the comparison result.

Correspondingly, the embodiment of the invention also provides a radio frequency interference detection device for the ANC earphone, and the device comprises control equipment and external detection equipment;

the control device is configured to control the radio frequency module to generate a radio frequency signal, serve as an interference source of the ANC analog link, and input a preset to-be-processed electrical signal to the ANC analog link, so that after the ANC analog link performs signal processing on the to-be-processed electrical signal, the control device outputs an analog signal and sends the analog signal to an external detection device for radio frequency interference detection, so that the external detection device performs signal conversion processing on the analog signal, and a radio frequency interference detection result is obtained;

and the external detection equipment is used for carrying out signal conversion processing on the analog signal to obtain a radio frequency interference detection result.

The radio frequency interference detection device for the ANC earphone provided by the embodiment of the invention can execute all the methods, and a user can adjust all parameters of the device according to needs.

As a preferred example, the control apparatus further includes: radio frequency control equipment and link control equipment;

the radio frequency control device is used for controlling the radio frequency module to generate a radio frequency signal as an interference source of the ANC analog link;

and the link control device is used for controlling the ANC analog link to perform signal processing on the electric signal to be processed, outputting an analog signal and sending the analog signal to an external detection device for radio frequency interference detection, so that the external detection device performs signal conversion processing on the analog signal to obtain a radio frequency interference detection result.

Drawings

FIG. 1: the invention provides a flow diagram of an embodiment of a radio frequency interference detection method for an ANC earphone;

FIG. 2: a schematic flow diagram of an embodiment of a method for performing signal processing on an ANC analog link according to the present invention;

FIG. 3: the present invention provides a schematic flow chart of an embodiment of obtaining a radio frequency interference detection result by an external detection device;

FIG. 4: the present invention provides a schematic structural diagram of an apparatus for detecting radio frequency interference for an ANC headset.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1, a flowchart of an embodiment of a method for detecting radio frequency interference of an ANC headset according to an embodiment of the present invention includes steps 101 to 103, which specifically include the following steps:

step 101: and generating a radio frequency signal by the radio frequency module to serve as an interference source of the ANC analog link.

In this embodiment, a radio frequency module included in the ANC headset is used as an interference source to control the ANC analog link to receive the electrical signal to be processed and perform signal processing on the electrical signal to output an analog signal, and an external detection device is controlled to receive the analog signal to perform radio frequency interference detection, so as to obtain a detection result. With the microphone tool that prior art adopted high sensitivity, low background noise to require, gather the sound signal of ANC earphone compares, and the analog signal that this embodiment was gathered then need not to set up the sound-proof box, also can not take place the problem of signal interference, when having saved the resource cost of high quality microphone tool, has still reduced the possibility that signal acquisition produced the interference. Meanwhile, the signal type of the electric signal to be processed provided by the embodiment is an electric signal rather than a sound signal, so that the electric signal is not interfered by the external environment, a sound insulation box is not required to be built for the electric signal, and the electric signal is used as a background noise signal, so that the ANC simulation link is in a smooth state, the normal working state of the ANC earphone in a radio frequency interference environment is simulated, the resource consumption of building the sound insulation box is saved, and the radio frequency interference state of the ANC earphone is better simulated.

In this embodiment, the radio frequency module serves as a radio frequency signal transmitter, that is, an interference source, and an antenna transmission module inside the ANC earphone is adopted instead of externally accessing a new radio frequency transmission module, so that the intervention of external test equipment is reduced, and meanwhile, the state of the earphone during testing is more suitable for the state of a user during normal use, thereby ensuring the accuracy of testing.

Step 102: and inputting a preset electric signal to be processed into the ANC analog link, so that the ANC analog link outputs an analog signal after performing signal processing on the electric signal to be processed.

In this embodiment, the electrical signal to be processed serves as a small signal, which is used to simulate a noise floor signal generated when the MIC device operates. The embodiment of the invention does not further limit the signal type, and a user can select the corresponding signal type according to different requirements. The user may select the magnitude and type of the electrical signal to be processed with reference to the acoustic performance characteristics of the MIC device, such as the sensitivity and SNR values of the MIC device. The selectable signal types include, but are not limited to, a white noise small signal, a pink noise signal, a sinusoidal signal, and the like, and the signal type of the electrical signal to be processed in this embodiment is the white noise small signal because the white noise small signal is closest to the background noise of the MIC device, and the signal size is-100 dBv, which is determined according to the acoustic performance characteristics of the MIC device.

Step 103: and sending the analog signal to external detection equipment for radio frequency interference detection, so that the external detection equipment performs signal conversion processing on the analog signal to obtain a radio frequency interference detection result.

In this embodiment, the external detection device does not need to connect the SPK end of the ANC earphone to collect the sound signal, but directly collects the analog signal output by the ANC analog link, thereby reducing the output of the sound signal at the SPK end, therefore, a microphone fixture with high sensitivity and low background noise requirement is not needed to collect the sound signal, the resource cost of the high-quality microphone fixture is saved, meanwhile, because the transmission signal is the analog signal, the problem of signal interference does not occur, and therefore, the problem that the detection result generates large errors due to interference generated in the signal transmission process is also reduced.

As another example in the embodiment of the present invention, referring to fig. 2, fig. 2 is a schematic flowchart of an embodiment of a method for performing signal processing on an ANC analog link provided by the present invention, including steps 201 to 203, which specifically include the following steps:

step 201: and the ANC analog link receives the electric signal to be processed, sequentially performs power amplification and maximum signal removal on the electric signal to be processed, and outputs the preprocessed signal.

In this example, the ANC analog link performs steps of power amplification, maximum signal removal, and the like on the electrical signal to be processed, and is used for simulating a link of an ANC earphone, and an ANC earphone internal link is also referred to for parameter setting of the above steps, so that accuracy of a test result is ensured. The power amplifying step is used for amplifying the received signal, and the maximum signal removing step is used for limiting the input of the maximum signal, so as to prevent the occurrence of a situation that the SPK response is too large due to too large signal, in this example, in order to simulate the signal transmission process when the ANC headset normally operates.

In this example, the type of AMP device used in the power amplifying step is not further limited, and the user can adjust the device used in this step as needed, including but not limited to Class a, class B, class D, class G, class AB, etc.

Step 202: and the ANC analog link converts the preprocessed signal from an analog form to a digital form, sequentially performs signal filtering and digital amplification on the preprocessed signal converted into the digital form, and outputs the digital signal.

In this example, since the signal transmission process first converts the analog signal into digital form, the signal transmission after conversion is no longer interfered by the influence of the radio frequency signal.

In this example, when the pre-processed signal converted into the digital form is filtered, the processing device is adjusted to the direct mode, so as to reduce the influence of the FF/FB filter on the interference signal, and make the transmitted signal easier to be visualized and designated for management and control. Meanwhile, the type of the Filter device used in the step is not further limited, and a user can adjust the type of the device according to the requirement and can replace the device with other types of devices realizing the same function.

In this example, the device for digital amplification process amplifies the signal after signal filtering process, and prevents the signal from being too small to cause the accuracy of the later detection to be reduced. Meanwhile, in the technical scheme of the invention, two paths of signals of the FB link and the FF link are combined into one link in the signal processing process, and digital signals are mixed, so that the signals can be conveniently acquired and processed at the later stage. Meanwhile, the type of the digital amplifying device used in the step is not further limited, and a user can adjust the type of the device according to the requirement and can replace the device with other types of devices with the same function.

Step 203: and the ANC analog link converts the digital signal from a digital form into an analog form, performs analog amplification on the digital signal converted from the digital form into the analog form, and outputs the analog signal.

In this example, the ANC analog link sequentially performs digital-to-analog conversion processing and analog amplification processing on the digital signal, where the digital-to-analog conversion processing is used to convert the digital signal into an analog form, and the analog amplification processing is used to amplify the transmitted analog signal. Compared with the prior art that the analog signal is amplified by using an analog amplifier to push the SPK to output the sound signal, the method directly outputs the analog signal, omits the step of sound output of the SPK, saves the resource consumption of a high-quality microphone jig, and reduces the interference of noise in the external environment due to the reduction of the output of the sound signal, thereby optimizing a tested link model and improving the accuracy of a test result.

Meanwhile, in this example, all the steps described in step 201 to step 203 and various devices used in each step are not further limited in the embodiment of the present invention, and a user may adjust several device types as needed.

As another example in the embodiment of the present invention, referring to fig. 3, fig. 3 is a schematic flowchart of an embodiment of obtaining a radio frequency interference detection result by an external detection device provided by the present invention, including steps 301 to 302, where each step specifically is as follows:

step 301: the external detection equipment receives the analog signal, converts the analog signal into a digital form, outputs a time domain signal, converts the time domain signal into a frequency domain signal and sends the frequency domain signal to the PC terminal, so that the PC terminal displays the radio frequency interference detection result.

In this example, the external detection device receives the analog signal output by the ANC analog link, converts the analog signal into a digital form, outputs a time domain signal, and converts the time domain signal into a frequency domain signal, so that the radio frequency interference resistance of the test link can be visually displayed at the PC end, and a user can directly observe the radio frequency interference detection result from the PC end without additionally purchasing other supporting devices, thereby achieving low implementation cost.

In this example, a time domain signal is converted into a frequency domain signal, and FFT processing is performed on the signal, that is, fourier transform is performed on the signal to obtain a frequency domain signal, because the frequency domain signal can visually display an interference noise signal, and data support is provided for post-detection of the radio frequency interference resistance of the ANC analog link.

Meanwhile, the type of the signal detection and analysis device is not further limited in the embodiment of the present invention, and a user may adjust the signal detection and analysis device as needed, and replace the FFT device with other Audio detection and analysis devices, including but not limited to Sound check, audio precision, ACQUA, adobe Audio, and the like, but the FFT device is preferred in the embodiment.

In this example, the user can specify the noise size and the specific frequency band of the disturbed audio from the PC, effectively and efficiently and intuitively screen out the bad devices which are disturbed and have noise, and greatly improve the radio frequency interference detection efficiency.

Step 302: comparing the detection result with a preset up-to-standard detection result in a similarity way, if the similarity is greater than or equal to a preset first similarity, enabling the ANC analog link to reach the standard, and carrying out ANC earphone encapsulation on the ANC analog link; and if the similarity is less than or equal to a preset second similarity, the ANC analog link does not reach the standard, and the ANC analog link needs to be returned to the factory for repair.

In this example, the detection result is compared with the preset radio frequency interference detection result of the standard ANC earphone in similarity, and whether the ANC analog link needs to be repaired or packaged into a finished product is determined according to the comparison result. Compared with the prior art for detecting and judging finished earphones, the embodiment of the invention has the advantages that the detection is carried out on the ANC analog link, the similarity comparison between the detection result and the preset up-to-standard detection result is carried out to judge the next step plan of the analog link, the realization is more convenient and faster, the detection is convenient as the ANC analog link of the semi-finished earphones, meanwhile, if the detection does not reach the standard, the semi-finished earphones can be directly repaired back to the factory without being like the finished earphones, the semi-finished earphones are disassembled and repaired back to the factory, and the detection efficiency and the production efficiency are improved.

For better illustration of the working principle and the step flow of the method and the apparatus for detecting radio frequency interference for ANC headphones according to the present invention, refer to the above related descriptions.

Correspondingly, referring to fig. 4, fig. 4 is a schematic structural diagram of an apparatus for detecting radio frequency interference for an ANC headset according to the present invention, where the apparatus includes a control device 401 and an external detection device 402, where the control device 401 further includes a radio frequency control device 401A and a link control device 401B.

The control device 401 is configured to control the radio frequency module to generate a radio frequency signal, serve as an interference source of the ANC analog link, and input a preset electrical signal to be processed to the ANC analog link, so that after the ANC analog link performs signal processing on the electrical signal to be processed, the ANC analog link outputs an analog signal and sends the analog signal to the external detection device 402 for radio frequency interference detection, so that the external detection device 402 performs signal conversion processing on the analog signal, and obtains a radio frequency interference detection result.

The external detection device 402 is configured to perform signal conversion processing on the analog signal to obtain a radio frequency interference detection result.

The radio frequency control device 401A is configured to control the radio frequency module to generate a radio frequency signal, which is used as an interference source of the ANC analog link.

The link control device 401B is configured to control the ANC analog link to perform signal processing on the electrical signal to be processed, output an analog signal, and send the analog signal to an external detection device for radio frequency interference detection, so that the external detection device performs signal conversion processing on the analog signal to obtain a radio frequency interference detection result.

In summary, in the radio frequency interference detection method and apparatus for an ANC earphone provided in the embodiments of the present invention, an internal antenna module of the ANC earphone is used as a radio frequency module to transmit a radio frequency signal as an interference source, and an ANC analog link receives an electrical signal to be processed and processes the signal to output an analog signal, so that an external detection device receives the analog signal to perform radio frequency interference detection, and obtains a detection result. The embodiment of the invention cancels the sending and receiving of the sound signal, reduces the high requirement of related equipment on the test environment, improves the accuracy of the radio frequency interference detection, and simultaneously utilizes the ANC analog link to effectively simulate the working state of the ANC earphone interfered by the radio frequency.

The above-mentioned embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, and it should be understood that the above-mentioned embodiments are only examples of the present invention and are not intended to limit the scope of the present invention. It should be understood that any modifications, equivalents, improvements and the like, which come within the spirit and principle of the invention, may occur to those skilled in the art and are intended to be included within the scope of the invention.

Claims

1. A radio frequency interference detection method for an ANC earphone is characterized in that the method is suitable for the ANC earphone, and the ANC earphone comprises a radio frequency module and an ANC analog link;

the radio frequency interference detection method comprises the following steps:

2. The method as claimed in claim 1, wherein the external detection device performs signal conversion processing on the analog signal to obtain a radio frequency interference detection result, specifically:

3. The method as claimed in claim 1, wherein the enabling of the ANC analog link to output an analog signal after performing signal processing on the electrical signal to be processed includes:

4. The method as claimed in claim 3, wherein the ANC analog link performs signal preprocessing on the electrical signal to be processed and outputs a preprocessed signal, specifically:

5. The method as claimed in claim 3, wherein the pre-processed signal is analog-to-digital converted to output a digital signal, specifically:

and the ANC analog link converts the preprocessed signal from an analog form to a digital form, sequentially performs signal filtering and digital amplification on the preprocessed signal converted into the digital form, and outputs the digital signal.

6. The method as claimed in claim 3, wherein the digital signal is subjected to digital-to-analog conversion to output an analog signal, specifically:

7. The method of claim 1, wherein after the obtaining the radio frequency interference detection result, further comprising:

and if the similarity is less than or equal to a preset second similarity, the ANC analog link does not reach the standard, and the ANC analog link needs to be returned to the factory for repairing.

8. An apparatus for radio frequency interference detection for an ANC headset, characterized in that the apparatus comprises a control device and an external detection device;

9. The apparatus of claim 8, wherein the control device further comprises: radio frequency control equipment and link control equipment;