CN113015078A - Anti-howling earphone debugging method and device in transparent mode - Google Patents
Anti-howling earphone debugging method and device in transparent mode Download PDFInfo
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- CN113015078A CN113015078A CN202110363239.5A CN202110363239A CN113015078A CN 113015078 A CN113015078 A CN 113015078A CN 202110363239 A CN202110363239 A CN 202110363239A CN 113015078 A CN113015078 A CN 113015078A
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- howling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
- H04R2460/01—Hearing devices using active noise cancellation
Abstract
The application discloses a method and a device for debugging an earphone in a transparent mode to prevent howling, which relate to the technical field of earphone debugging and comprise steps S1-S6, a test sound box, a development board/MIC power supply device, an audio analysis device and PC equipment, wherein the test sound box is a noise sounding device; the development board/MIC power supply device is used for supplying power to and inputting power to the MIC for picking up the sound of the earphone loudspeaker. The debugging method for suppressing the filter parameters of the howling condition generated by the blocked feedforward microphone in the transparent mode is realized, so that most surrounding environment sounds are picked up, the improvement can be obviously realized, and good use experience is provided for a user; analyzing the frequency domain of the FFT spectrum waveform which generates the howling in the transparent mode to obtain the frequency point which generates the howling; by debugging filter parameters, frequency points blocking the feedforward microphone to generate howling are suppressed on the filter, a transparent mode of receiving most environments is reserved, and good environment transparent experience is provided for users.
Description
Technical Field
The application relates to the technical field of earphone debugging, in particular to an earphone debugging method and device for preventing howling in a transparent mode.
Background
The earphone is a pair of conversion units which receive the electric signals from the media player or receiver and convert them into audible sound waves by using a speaker near the ear. The headset is typically detachable from the media player and utilizes a plug connection. The advantage is that the user can listen to the sound independently without influencing other people; can also isolate the sound of the surrounding environment, and is very helpful for people who use in a noisy environment such as a recording studio, a bar, a trip, sports, and the like. The earphone is originally used for telephone and radio, but with the prevalence of portable electronic devices, the earphone is often used for mobile phones, walkmans, radios, portable electronic games, digital audio players, and the like.
With the rapid development of modern software development and digital signal processing technology, earphones become the mainstream development trend of the future earphone industry, and at present, the mainstream trend includes Huashi, Haman, BOSE and the like, and the trend is increasingly added to the research and development design of noise reduction earphones. Except that the noise reduction function of reducing external noise is provided, in some use scenes, such as broadcasting sound of buses or subway stations, road whistling and the like, the noise reduction earphone needs to pay more attention to external sound, can monitor the surrounding environment in real time, and reduces the noise reduction effect, so that better use experience can be obtained. In the actual earphone design, due to the defects in the structure cavity design or under the condition that the feedforward microphone is not completely sealed, the earphone blocks the feedforward microphone after the through mode is started, and the howling condition can occur.
How to debug the noise reduction earphone in the transparent mode to prevent the earphone from howling, ensure that most of the external environment sound picked up by the earphone is not weakened, meet the good use experience of users in terms of hearing, and simultaneously save the cost in the design research and development stage has certain significance, so that the earphone debugging method and the device for preventing howling in the transparent mode need to be provided.
Disclosure of Invention
The embodiment of the application provides an earphone debugging method for preventing howling in a transparent mode, wherein a debugging process of a noise reduction earphone for preventing howling in the transparent mode comprises the following steps:
s1, placing the test sound box at the L side of the earphone, and controlling the test sound box to play noise by connecting the PC equipment with an audio analysis device;
step S2: the earphone to be tested is turned off, two sides of the earphone L, R are respectively placed at the MIC positions of two sides L, R, noise is played through S1, and a frequency response curve P1-L received by the MIC position of the L side can be collected at the PC end;
step S3: the earphone to be tested is started, a through mode is started, a hole for receiving external environment sound by the feedforward microphone is blocked, noise is played through S1, and a time domain graph F1_ L of FFT spectrum waveform received by the MIC at the L side can be collected at the PC end;
step S4: the frequency point generating howling is obtained through analysis, and the howling can be prevented by adding gain suppression on the frequency point on the design of a filter;
step S5: after a set of filter parameters is added, the pass-through mode test earphone L is turned onmicReceiving a frequency response curve a1_ L;
step S6: after the S5 curve is obtained, the feedforward microphone is blocked, whether howling occurs or not is checked, if howling still exists at the L side of the earphone, the gain of the filter at the frequency point is adjusted until the howling does not occur, and then the optimal filter parameter for suppressing the howling can be obtained.
The technical scheme is adopted in the embodiment of the application, and the test sound box is set to be an active sound box or a passive sound box.
The technical scheme is adopted in the embodiment of the application, and the test sound box is provided with two groups of test sound boxes, wherein the two groups of test sound boxes are respectively used for an L edge and an R edge of the noise reduction earphone.
The embodiment of the application adopts the following technical scheme that the noise played by the test sound box comprises pink noise and white noise.
The embodiment of the application adopts the following technical scheme that the filter is set to be a digital filter or an analog filter.
The technical scheme is adopted in the embodiment of the application, and the noise reduction earphone is set to be a TWS earphone, a neck earphone and a head earphone with a feedforward microphone.
The embodiment of the present application further provides an earphone debugging device for preventing howling in a transparent mode, including:
the test sound box is a noise sounding device and is used for playing noise;
the development board/MIC power supply device is used for supplying power to and inputting MIC for picking up the sound of the earphone loudspeaker and outputting an audio signal received by the MIC to the audio analysis device;
the audio analysis device is used for an instrument for processing and analyzing the digital signal and can acquire the frequency response of the input signal;
and the PC equipment is used for connecting and controlling the audio analysis device to play noise to obtain a frequency response curve of the input signal, and can be used for debugging filter parameters in a pass-through mode.
The technical scheme is adopted in the embodiment of the application, the development board/MIC power supply device comprises a lithium storage battery with the capacity of 10000mAh at least, and the development board/MIC power supply device comprises an MIC intelligent power supply socket with a multi-charging interface.
The embodiment of the application adopts the following technical scheme that the audio analysis device further comprises the functions of FFT spectrum analysis and sound pressure level measurement.
The technical scheme is adopted in the embodiment of the application, and the PC equipment is set as a notebook computer of a WINDOWS system.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
1. the debugging method for suppressing the filter parameters of the howling condition generated by the blocked feedforward microphone in the transparent mode is realized, so that most surrounding environment sounds are picked up, the improvement can be obviously realized, and good use experience is provided for a user;
2. analyzing the frequency domain of the FFT spectrum waveform which generates the howling in the transparent mode to obtain the frequency point which generates the howling; by debugging filter parameters, frequency points blocking the feedforward microphone to generate howling are suppressed on the filter, a transparent mode of receiving most environments is reserved, and good environment transparent experience is provided for users.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a flowchart of a method for debugging an earphone in a transparent mode to prevent howling according to the present invention;
fig. 2 is a system block diagram of the headset debugging device for preventing howling in the pass-through mode according to the present invention;
fig. 3 is a schematic time domain analysis diagram of an FFT spectrum received by an L-edge MIC in the headset debugging method for preventing howling in the pass-through mode according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, 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 application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Examples
As shown in fig. 1, a flow of debugging noise reduction earphones for preventing howling in a transparent mode is described by taking L ears as an example, assuming that howling is generated on L sides of the earphones, and a method for debugging noise reduction earphones for preventing howling in a transparent mode includes the following steps:
s1, placing the test sound box at the L side of the earphone, and controlling the test sound box to play noise by connecting the PC equipment with an audio analysis device;
step S2: the earphone to be tested is turned off, two sides of the earphone L, R are respectively placed at the MIC positions of two sides L, R, noise is played through S1, and a frequency response curve P1-L received by the MIC position of the L side can be collected at the PC end;
step S3: the earphone to be tested is started, a through mode is started, a hole for receiving external environment sound by the feedforward microphone is blocked, noise is played through S1, and a time domain graph F1_ L of FFT spectrum waveform received by the MIC at the L side can be collected at the PC end;
step S4: the frequency point generating howling is obtained through analysis, and the howling can be prevented by adding gain suppression on the frequency point on the design of a filter;
step S5: after a set of filter parameters is added, the pass-through mode test earphone L is turned onmicReceiving a frequency response curve a1_ L;
step S6: after the S5 curve is obtained, the feedforward microphone is blocked, whether howling occurs or not is checked, if howling still exists at the L side of the earphone, the gain of the filter at the frequency point is adjusted until the howling does not occur, and then the optimal filter parameter for suppressing the howling can be obtained.
As shown in fig. 3, the content of the figure is a schematic time domain analysis (only schematic) of an FFT spectrum received by an L-edge MIC; when we block the feedforward microphone to generate howling, we can see that the sound pressure value of a certain frequency point becomes high, and at this time, we can find out the frequency point generating howling.
The test sound box is set to be an active sound box or a passive sound box; the test sound boxes are provided with two groups, and the two groups of test sound boxes are respectively used for the L side and the R side of the noise reduction earphone; the noise played by the test sound box comprises pink noise and white noise; the filter is set to be a digital filter or an analog filter; the noise reduction earphone is set to be a TWS earphone, a neck earphone and a head earphone with a feedforward microphone.
As shown in fig. 2, an embodiment of the present application further provides an earphone debugging device for preventing howling in a pass-through mode, including:
the test sound box is a noise sounding device and is used for playing noise;
the development board/MIC power supply device is used for supplying power to and inputting MIC for picking up the sound of the earphone loudspeaker and outputting an audio signal received by the MIC to the audio analysis device;
the audio analysis device is used for an instrument for processing and analyzing the digital signal and can acquire the frequency response of the input signal;
and the PC equipment is used for connecting and controlling the audio analysis device to play noise to obtain a frequency response curve of the input signal, and can be used for debugging filter parameters in a pass-through mode.
The development board/MIC power supply device comprises a lithium storage battery with the capacity of at least 10000mAh, and the development board/MIC power supply device comprises an MIC intelligent power supply socket with a multi-charging interface; the audio analysis device also comprises the functions of FFT spectrum analysis and sound pressure level measurement; the PC equipment is a notebook computer of a WINDOWS system.
In summary, the following steps: the debugging method for suppressing the filter parameters of the howling condition generated by the blocked feedforward microphone in the transparent mode is realized, so that most surrounding environment sounds are picked up, the improvement can be obviously realized, and good use experience is provided for a user; analyzing the frequency domain of the FFT spectrum waveform which generates the howling in the transparent mode to obtain the frequency point which generates the howling; by debugging filter parameters, frequency points blocking the feedforward microphone to generate howling are suppressed on the filter, a transparent mode of receiving most environments is reserved, and good environment transparent experience is provided for users.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A method for debugging an earphone for preventing howling in a transparent mode is characterized in that a debugging process of a noise reduction earphone for preventing howling in the transparent mode comprises the following steps:
s1, placing the test sound box at the L side of the earphone, and controlling the test sound box to play noise by connecting the PC equipment with an audio analysis device;
step S2: the earphone to be tested is turned off, two sides of the earphone L, R are respectively placed at the MIC positions of two sides L, R, noise is played through S1, and a frequency response curve P1-L received by the MIC position of the L side can be collected at the PC end;
step S3: the earphone to be tested is started, a through mode is started, a hole for receiving external environment sound by the feedforward microphone is blocked, noise is played through S1, and a time domain graph F1_ L of FFT spectrum waveform received by the MIC at the L side can be collected at the PC end;
step S4: the frequency point generating howling is obtained through analysis, and the howling can be prevented by adding gain suppression on the frequency point on the design of a filter;
step S5: after a set of filter parameters is added, the pass-through mode test earphone L is turned onmicReceiving a frequency response curve a1_ L;
step S6: after the S5 curve is obtained, the feedforward microphone is blocked, whether howling occurs or not is checked, if howling still exists at the L side of the earphone, the gain of the filter at the frequency point is adjusted until the howling does not occur, and then the optimal filter parameter for suppressing the howling can be obtained.
2. The method as claimed in claim 1, wherein the test speaker is configured as an active speaker or a passive speaker.
3. The method as claimed in claim 2, wherein the test speaker is provided with two groups, and the two groups of test speakers are respectively used for the L side and the R side of the noise reduction earphone.
4. The headset debugging method of claim 3, wherein the noise played by the test speaker comprises pink noise and white noise.
5. The headset debugging method of claim 1, wherein the filter is configured as a digital filter or an analog filter.
6. The headset debugging method for howling prevention in pass-through mode according to any one of claims 1 to 5, wherein the noise reduction headset is set as a TWS headset with a feedforward microphone, a neck headset or a head set.
7. An earphone debugging device for preventing howling in a transparent mode is characterized by comprising:
the test sound box is a noise sounding device and is used for playing noise;
the development board/MIC power supply device is used for supplying power to and inputting MIC for picking up the sound of the earphone loudspeaker and outputting an audio signal received by the MIC to the audio analysis device;
the audio analysis device is used for an instrument for processing and analyzing the digital signal and can acquire the frequency response of the input signal;
and the PC equipment is used for connecting and controlling the audio analysis device to play noise to obtain a frequency response curve of the input signal, and can be used for debugging filter parameters in a pass-through mode.
8. The headset debugging device of claim 7, wherein the development board/MIC power supply comprises a lithium secondary battery with a capacity of at least 10000mAh, and the development board/MIC power supply comprises an MIC smart power socket with multiple charging interfaces.
9. The apparatus as claimed in claim 7, wherein the audio analysis apparatus further comprises FFT spectrum analysis and sound pressure level measurement functions.
10. The headset debugging device of claim 7, wherein the PC device is a laptop computer with WINDOWS system.
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| CN202110363239.5A CN113015078A (en) | 2021-04-02 | 2021-04-02 | Anti-howling earphone debugging method and device in transparent mode |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113473304A (en) * | 2021-08-17 | 2021-10-01 | 北京小米移动软件有限公司 | Howling suppression method, howling suppression device, earphone and storage medium |
| CN113596662A (en) * | 2021-07-30 | 2021-11-02 | 北京小米移动软件有限公司 | Howling suppression method, howling suppression device, headphone, and storage medium |
| CN113660595A (en) * | 2021-09-19 | 2021-11-16 | 深圳市昂思科技有限公司 | Method for detecting proper earcap and eliminating squeal by earphone |
| CN115604646A (en) * | 2022-11-25 | 2023-01-13 | 杭州兆华电子股份有限公司（Cn） | Panoramic deep space audio processing method |
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2021
- 2021-04-02 CN CN202110363239.5A patent/CN113015078A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113596662A (en) * | 2021-07-30 | 2021-11-02 | 北京小米移动软件有限公司 | Howling suppression method, howling suppression device, headphone, and storage medium |
| CN113596662B (en) * | 2021-07-30 | 2024-04-02 | 北京小米移动软件有限公司 | Method for suppressing howling, device for suppressing howling, earphone, and storage medium |
| CN113473304A (en) * | 2021-08-17 | 2021-10-01 | 北京小米移动软件有限公司 | Howling suppression method, howling suppression device, earphone and storage medium |
| CN113473304B (en) * | 2021-08-17 | 2024-01-23 | 北京小米移动软件有限公司 | Howling suppression method, device, earphone and storage medium |
| CN113660595A (en) * | 2021-09-19 | 2021-11-16 | 深圳市昂思科技有限公司 | Method for detecting proper earcap and eliminating squeal by earphone |
| CN115604646A (en) * | 2022-11-25 | 2023-01-13 | 杭州兆华电子股份有限公司（Cn） | Panoramic deep space audio processing method |
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