CN113794965B - Earphone frequency response calibration method and device, earphone equipment and storage medium - Google Patents
Earphone frequency response calibration method and device, earphone equipment and storage medium Download PDFInfo
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- 238000007789 sealing Methods 0.000 claims description 7
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1083—Reduction of ambient noise
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only for telephonic receivers
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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
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
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Abstract
The invention discloses a method and a device for calibrating earphone frequency response, earphone equipment and a storage medium, wherein the method comprises the following steps: when the earphone device is detected to be in a wearing state, acquiring a first external signal which is received by an error microphone and leaks into a cavity from the outside, wherein the cavity is formed by the earphone device and an ear canal of a user when the earphone device is in the wearing state; acquiring a preset gain coefficient, and performing gain processing on the first external signal by adopting the gain coefficient to obtain a compensation signal; the compensation signal is compensated to the audio path of the speaker to perform frequency response calibration on the headset device. The invention can realize the purpose of avoiding the reduction of the audio tone quality listened by the user through the earphone equipment due to wearing leakage by carrying out frequency response calibration.
Description
Technical Field
The present invention relates to the field of earphone technologies, and in particular, to an earphone frequency response calibration method and apparatus, an earphone device, and a storage medium.
Background
At present, the technology of each aspect of the earphone is mature day by day, but for the earphone, it always has a problem to be discussed about the wearing leakage, if the user can not normally wear the earphone (the earphone is completely fitted with the ear), or the ear structure is different from a normal person and the earphone can not be correctly worn, this all can lead to the problem that the earphone is worn and leaked, that is, the frequency response (frequency response) of the earphone can not reach the frequency response when normally wearing, thereby influencing the tone quality that the user listens to through the earphone.
Disclosure of Invention
The invention mainly aims to provide a method and a device for calibrating earphone frequency response, earphone equipment and a storage medium, and aims to solve the technical problem that the earphone frequency response cannot reach the frequency response when the earphone is normally worn when the earphone is worn and leaked.
In order to achieve the above object, the present invention provides a method for calibrating a headphone frequency response, the method being applied to a headphone apparatus, the headphone apparatus including an error microphone, the error microphone being disposed in a sound production direction of a speaker of the headphone apparatus, the method including the steps of:
when the earphone device is detected to be in a wearing state, acquiring a first external signal which is received by the error microphone and leaks into a cavity from the outside, wherein the cavity is formed by the earphone device and an ear canal of a user when the earphone device is in the wearing state;
acquiring a preset gain coefficient, and performing gain processing on the first external signal by adopting the gain coefficient to obtain a compensation signal;
compensating the compensation signal to an audio path of the speaker to perform frequency response calibration on the earphone device.
Optionally, the step of acquiring a first signal received by the error microphone and leaked into the cavity from the outside includes:
acquiring a microphone receiving signal received by the error microphone;
and removing the output signal of the current audio channel of the loudspeaker from the microphone receiving signal to obtain the first external signal leaked into the cavity from the outside.
Optionally, before the step of obtaining a preset gain coefficient and performing gain processing on the external signal by using the gain coefficient to obtain a compensation signal, the method further includes:
when the earphone equipment is worn on a test ear for each test, playing a test signal through the loudspeaker, wherein the sealing degree of a cavity formed between the earphone equipment and the test ear is different during each test;
acquiring a frequency response signal received by the test ear and a second external signal received by the error microphone during each test;
and calculating a relation coefficient between the attenuation amount of the frequency response signal and the second external signal through each group of the frequency response signal and the second external signal, and setting the relation coefficient as the gain coefficient in the earphone equipment.
Optionally, the step of setting the relationship coefficient as the gain coefficient in the headphone apparatus includes:
setting the relation coefficient as a gain coefficient corresponding to the frequency band of the test signal in the earphone device;
the step of obtaining the preset gain factor comprises:
acquiring an output signal of a current audio channel of the loudspeaker, and determining a frequency band of the output signal;
and acquiring a preset gain coefficient corresponding to the frequency band of the output signal.
Optionally, before the step of acquiring, when it is detected that the earphone device is in a wearing state, a first external signal leaked into the cavity from the outside and received by the error microphone, the method further includes:
acquiring acquisition values of a plurality of contact sensors arranged on a headset head in the headset equipment;
detecting whether each acquisition value is larger than a preset threshold value or not;
and if at least one of the acquired values is larger than the preset threshold value, determining that the earphone equipment is in a wearing state.
Optionally, before the step of acquiring the first external signal received by the error microphone and leaked into the cavity from the outside, the method further includes:
when the earphone equipment is detected to be in a wearing state and at least one acquisition value is not larger than the preset threshold value, starting a frequency response calibration mode of the earphone equipment;
the step of acquiring a first external signal which is received by the error microphone and leaks into the cavity from the outside comprises the following steps:
and acquiring a first external signal which is received by the error microphone and leaks into the cavity from the outside in the frequency response calibration mode.
Optionally, before the step of turning on the frequency response calibration mode of the earphone device, the method further includes:
when the earphone equipment is detected to be in a wearing state and at least one acquisition value is not larger than the preset threshold value, outputting prompt information to prompt a user to wear the earphone correctly;
accumulating the duration of the state that the earphone equipment is in a wearing state and at least one acquisition value is not greater than the preset threshold value after the prompt message is output;
and when the duration is detected to reach the preset duration, executing the step of starting the frequency response calibration mode of the earphone equipment.
In order to achieve the above object, the present invention further provides a device for calibrating a frequency response of a headphone, the device being disposed in a headphone apparatus, the headphone apparatus including an error microphone, the error microphone being disposed in a sound-emitting direction of a speaker of the headphone apparatus, the device including:
the acquisition module is used for acquiring a first external signal which is received by the error microphone and leaks into a cavity from the outside when the earphone device is detected to be in a wearing state, wherein the cavity is formed by the earphone device and an ear canal of a user when the earphone device is in the wearing state;
the gain module is used for acquiring a preset gain coefficient and performing gain processing on the first external signal by adopting the gain coefficient to obtain a compensation signal;
and the calibration module is used for compensating the compensation signal to an audio channel of the loudspeaker so as to calibrate the frequency response of the earphone equipment.
To achieve the above object, the present invention also provides an earphone device, including: a memory, a processor and a headset frequency response calibration program stored on the memory and executable on the processor, the headset frequency response calibration program when executed by the processor implementing the steps of the headset frequency response calibration method as described above.
In addition, to achieve the above object, the present invention further provides a computer readable storage medium, on which a headset frequency response calibration program is stored, and the headset frequency response calibration program, when executed by a processor, implements the steps of the headset frequency response calibration method as described above.
According to the invention, the error microphone is arranged in the sounding direction of the loudspeaker of the earphone device, when the earphone device is detected to be in a wearing state, a first external signal which is received by the error microphone and leaked from the outside into a cavity formed between the earphone device and the ear canal of a user is obtained, a gain coefficient is obtained, the first external signal is subjected to gain processing by adopting the gain coefficient to obtain a compensation signal for frequency response calibration, the compensation signal is compensated into an audio channel of the loudspeaker to calibrate the frequency response of the earphone device, and therefore, the problem that the audio tone quality of the audio which is listened to by the user through the earphone device is reduced due to wearing leakage is avoided.
Drawings
Fig. 1 is a schematic flow chart illustrating a first embodiment of a method for calibrating a frequency response of an earphone according to the present invention;
fig. 2 is a schematic structural diagram of an earphone according to an embodiment of the present invention;
fig. 3 is a functional block diagram of a preferred embodiment of the device for calibrating frequency response of an earphone according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Referring to fig. 1, fig. 1 is a schematic flow chart of a first embodiment of a method for calibrating a frequency response of an earphone according to the present invention.
Embodiments of the present invention provide embodiments of a method for calibrating a frequency response of a headset, and it should be noted that although a logical sequence is shown in the flow chart, in some cases, the steps shown or described may be performed in a different sequence than that shown or described herein. The method for calibrating the frequency response of the earphone is applied to the earphone equipment, the earphone equipment comprises an error microphone, as shown in figure 2, the error microphone is arranged in the sounding direction of a loudspeaker of the earphone equipment, and an error mic in the figure is the error microphone. In this embodiment, the method for calibrating the frequency response of the earphone includes:
step S10, when the earphone device is detected to be in a wearing state, acquiring a first external signal which is received by the error microphone and leaks into a cavity from the outside, wherein the cavity is formed by the earphone device and an ear canal of a user when the earphone device is in the wearing state;
when the user normally wears the earphone equipment, the ears are completely attached to the earphone equipment to form a relatively closed cavity, when the user does not normally wear the earphone equipment, a non-attachment place is arranged between the ears and the earphone equipment, a gap exists in the cavity, external sound leaks into the cavity through the gap and is heard by the user, the user is influenced to listen to sound played by the earphone equipment, namely, the frequency response of the earphone is abnormal, and the problem of leakage is solved.
In this embodiment, to avoid wearing leakage to affect the sound quality heard by the user, a calibration method for wearing leakage is provided, and the frequency response of the headset device is calibrated, so that the frequency response after calibration can be as consistent as possible with the frequency response during normal wearing.
Specifically, the headphone device may detect whether the headphone device is in a worn state. Whether the headset device is in the wearing state or not can be detected by means of an infrared sensor, a distance sensor and the like, and detailed description is omitted here. The headphone device can detect whether it is in a wearing state at a timing when it is in an operating state (for example, when it is connected to the main device).
In one embodiment, the headset device may be configured to perform the frequency response calibration when detecting that the headset device is in the wearing state, and in other embodiments, the headset device may also be configured to perform the frequency response calibration when detecting that other conditions are met, for example, the frequency response calibration is performed when detecting an instruction that a user triggers to start the frequency response calibration mode in the wearing state.
When the earphone equipment carries out frequency response calibration, receiving a sound signal through an error microphone; because the error microphone is arranged in the sound production direction of the loudspeaker of the earphone device, when the earphone device is in a wearing state, the error microphone is positioned in a cavity formed by the earphone device and the ear canal of a user, therefore, a signal (hereinafter referred to as a first external signal for distinguishing) leaked from the outside into the cavity can be received by the error microphone, and the earphone device acquires the first external signal received by the error microphone.
In one embodiment, when the audio path of the speaker of the earphone device does not output a signal, the sound signal received by the error microphone is the first external signal, and at this time, the earphone device may directly use the signal received by the error microphone as the first external signal.
Further, in another embodiment, the step of acquiring the first signal received by the error microphone and leaked into the cavity from the outside in step S10 includes:
step S101, acquiring a microphone receiving signal received by the error microphone;
step S102, removing the output signal of the current audio channel of the loudspeaker from the microphone receiving signal to obtain the first external signal leaked into the cavity from the outside.
When an audio channel of a speaker of the earphone device has an output signal, the earphone device may first obtain a signal received by the error microphone (hereinafter referred to as a microphone received signal), and at this time, the microphone received signal includes both the output signal of the speaker audio channel received by the error microphone and a first external signal leaked into the cavity from the outside. The earphone device can remove the output signal of the current audio channel of the loudspeaker from the microphone receiving signal, and the rest signal is used as the first external signal.
Step S20, obtaining a preset gain coefficient, and performing gain processing on the first external signal by adopting the gain coefficient to obtain a compensation signal;
after the earphone device acquires the first external signal, a preset gain coefficient can be acquired. The gain coefficient can be pre-stored in the earphone device, the earphone device obtains the gain coefficient from the storage, or the gain coefficient is stored in a background server, and the earphone device obtains the gain coefficient from the background server device through a connected main device; the value of the gain factor may be selected empirically or calculated by testing, and is not limited in this embodiment.
The earphone device performs gain processing on the first external signal by adopting the gain coefficient, the signal obtained by the gain processing is used as a compensation signal, and the compensation signal is used for calibrating the frequency response.
And S30, compensating the compensation signal to an audio channel of the loudspeaker so as to calibrate the frequency response of the earphone equipment.
After the compensation signal is obtained, the headphone device compensates the compensation signal to the audio channel of the speaker, that is, the compensation signal is output through the audio channel of the speaker, when the current audio channel of the speaker has an output signal, the compensation signal is used for compensating the output signal, and the two signals are output in a superposition manner, so that the frequency response calibration of the headphone device is achieved.
It should be noted that, in this embodiment, the principle of obtaining the compensation signal by performing gain on the first external signal by using the gain coefficient, and performing frequency response calibration by using the compensation signal to compensate the audio channel is as follows: when the wearing leakage degree of the earphone device is larger, the intensity of the first external signal S received by the error microphone is larger, the frequency response is lower, and the first external signal S and the attenuation amount of the frequency response are in a direct proportion relation, that is, when the first external signal S is S (f), the frequency response H (f) = FRref-AS (f) of the earphone device is present, where f represents frequency, H (f) is the actual frequency response of the earphone device, FRref is the frequency response when the earphone device is assumed to be worn normally, AS (f) is the attenuation amount of the frequency response, and a is a gain coefficient; in order to calibrate the frequency response to the level when the wearing is normal, the S (f) can be subjected to gain compensation to an audio channel of the loudspeaker through the gain coefficient A, so that the calibration of the frequency response is realized.
In this embodiment, an error microphone is arranged in a sound production direction of a loudspeaker of the earphone device, when the earphone device detects that the earphone device is in a wearing state, a first external signal received by the error microphone and leaked from the outside into a cavity formed between the earphone device and an ear canal of a user is obtained, a gain coefficient is obtained, the first external signal is subjected to gain processing by the gain coefficient to obtain a compensation signal for frequency response calibration, the compensation signal is compensated to an audio channel of the loudspeaker, the frequency response of the earphone device is calibrated, and the problem that the audio tone quality of the user who listens through the earphone device is reduced due to wearing leakage is solved.
Further, in an embodiment, after acquiring the first external signal, the earphone device may first detect whether the intensity of the first external signal is less than a preset intensity. The preset intensity can be set as required, when the first external signal is smaller than the preset intensity, the earphone device can be considered to be normally worn, at the moment, the earphone device can ignore the first external signal, and frequency response calibration is not performed, so that the problem that unnecessary frequency response calibration causes earphone computing resource waste is avoided. Further, when the strength of the first external signal is not less than the preset strength, it is indicated that the earphone device is worn and leaked, and at this time, the earphone device can gain the first external signal and further compensate an audio channel of the speaker, so as to calibrate the frequency response of the earphone device.
Further, based on the first embodiment, a second embodiment of the method for calibrating a frequency response of an earphone according to the present invention is provided, and in this embodiment, before the step S20, the method further includes:
step S40, when the earphone equipment is worn on a test ear for each test, playing a test signal through the loudspeaker, wherein the sealing degree of a cavity formed between the earphone equipment and the test ear is different during each test;
in the present embodiment, the gain factor may be calculated by testing the headphone apparatus. In particular, the headset device may be worn to the test ear for at least two tests. The test ear may be a device simulating the ear of a user, and a microphone is disposed in the test ear at a position similar to the eardrum of the human ear for receiving the sound signal played by the speaker of the earphone device.
When testing each time, the earphone device is worn to the back of a test ear, a test instruction can be sent to the earphone device through the main device connected with the earphone device, the earphone device plays a test signal through the loudspeaker after receiving the test instruction, and the test signal can be a section of sound signal preset in the earphone device or a section of sound signal sent to the earphone device through the main device.
It can be understood that when the earphone device is worn to the test ear, a cavity is formed between the earphone device and the test ear, and in order to measure the correlation coefficient between the attenuation of the frequency response of the earphone device under different wearing leakage degrees and the signal leaked into the cavity from the outside, the sealing degree of the cavity formed between the earphone device and the test ear is set to be different during each test. The earphone equipment can be specifically adjusted through the fitting degree between the earphone equipment and the test ears when being worn on the test ears during each test, so that the sealing degree of the cavity can be adjusted.
Step S50, acquiring a frequency response signal received by the test ear and a second external signal received by the error microphone during each test;
at each test, the earphone device acquires a signal received by the test ear (hereinafter, referred to as a frequency response signal to indicate distinction) and acquires a signal received by the error microphone, which is externally leaked into a cavity between the earphone device and the test ear (hereinafter, referred to as a second external signal to indicate distinction). The frequency response signal received by the test ear can be sent to the earphone device by the test ear, or sent to the main device connected with the earphone device by the test ear, and then sent to the earphone device by the main device.
It is understood that, each test obtains one frequency response signal and one second external signal, and one frequency response signal and one second external signal are used as a group, and multiple groups of data can be obtained through multiple tests. And because the airtight degree of the cavity formed between the earphone equipment and the test ear during each test, the frequency response signals in each group of data can be different, and the second external signals can also be different.
Step S60, calculating a relation coefficient between the attenuation amount of the frequency response signal and the second external signal through each group of the frequency response signal and the second external signal, and setting the relation coefficient as the gain coefficient in the earphone device.
After obtaining the sets of data, the earphone device may calculate a relation coefficient between the attenuation amount of the frequency response signal and the second external signal through the sets of data. Specifically, in an embodiment, when there are two sets of data, the relationship coefficient between the two quantities may be directly calculated by using the two sets of data, for example, the first set of data includes a frequency response signal H1 and a second external signal S1, the second set of data includes a frequency response signal H2 and a second external signal S2, and if the frequency response of the test signal is H when the test signal is normally worn, H1= H-AS1 and H2= H-AS2, the relationship coefficient a, that is, a = (H1-H2)/(S2-S1), may be calculated by using the two formulas. In another embodiment, when there are three or more sets of data, a relationship coefficient may be calculated between each two sets of data, and then the relationship coefficients are averaged to obtain a final relationship coefficient.
After the relationship coefficient is calculated, the headphone device may set the relationship coefficient as a gain coefficient in the headphone device, for example, in a memory chip of the headphone device. When the frequency response of the earphone equipment needs to be calibrated, the gain coefficient can be obtained for calibration, and therefore the problem that the audio tone quality of a user listening through the earphone equipment is reduced due to wearing leakage is avoided.
Further, in an embodiment, the step of setting the relation coefficient as the gain coefficient in the headphone apparatus in the step S60 includes:
step S601, setting the relation coefficient as a gain coefficient corresponding to the frequency band of the test signal in the earphone device;
when earphone equipment takes place to wear to reveal, the frequency response of the output signal of the different frequency of speaker broadcast has the decay of different degree, and generally, low frequency response decrement can be higher, consequently, in this embodiment, can set up different gain factor to different frequency channels to carry out more accurate frequency response calibration to the output signal of different frequency channels.
Specifically, gain coefficients corresponding to different frequency bands may be preset in the earphone device. In one embodiment, each gain factor may be selected empirically or calculated based on testing. In another embodiment, the gain coefficients of different frequency bands can be obtained by performing test calculation according to the test calculation method in the above steps S40 to S60; when testing and calculating the gain coefficient of a frequency band, playing a test signal of the frequency band through a loudspeaker, and setting the gain coefficient as the gain coefficient corresponding to the frequency band in the earphone equipment after testing and calculating to obtain the gain coefficient; and respectively testing and calculating the gain coefficients of the multiple frequency bands so as to set the gain coefficients corresponding to different frequency bands in the earphone equipment.
The step of obtaining the preset gain factor in step S20 includes:
step S201, acquiring an output signal of a current audio channel of the loudspeaker, and determining a frequency band of the output signal;
step S202, obtaining a preset gain coefficient corresponding to the frequency band of the output signal.
After the earphone device acquires the first external signal, the earphone device can acquire an output signal of a current audio channel of the loudspeaker, determine a frequency band of the output signal, acquire a gain coefficient preset in the earphone device corresponding to the frequency band, and perform gain processing on the first external signal by using the gain coefficient. It should be noted that, when the output signal corresponds to multiple frequency bands, the gain coefficient corresponding to each frequency band may be obtained, and the signals in different frequency bands of the first external signal are respectively subjected to gain processing by using the gain coefficients corresponding to the frequency bands, so as to obtain the compensation signal in each frequency band.
In this embodiment, through setting up the gain factor that different frequency channels correspond respectively to adopt the signal that corresponds the frequency channel to carry out gain processing to first external signal, further improved the audio signal of the different frequency channels of broadcasting earphone equipment speaker and carried out the degree of accuracy of frequency response calibration, and then can further improve the tone quality that the user listened to the audio frequency through earphone equipment.
Further, based on the first and/or second embodiments, a third embodiment of the method for calibrating a frequency response of an earphone according to the present invention is provided, where before the step S10, the method further includes:
step A10, acquiring acquisition values of a plurality of contact sensors arranged on a headset head in the headset equipment;
can set up a plurality of contact pick-up units in the earphone equipment on the earphone head, the position that sets up of contact pick-up unit can be earphone head and user's ear when the earphone equipment is in wearing the state and has the position of contact, and a plurality of contact pick-up units can evenly distributed in the contact surface of earphone head and user's ear to whether normally wear earphone equipment from each angle detection user. The touch sensor may be a capacitive sensor or a pressure sensor, and is not limited in this embodiment; the collected value of the capacitance sensor is a capacitance value, and the collected value of the pressure sensor is a pressure value.
The ear speaker device can acquire the collected values of a plurality of contact sensors provided at the head of the ear speaker. In a specific embodiment, the earphone device may periodically acquire the collected value of the contact sensor while being in the working state.
Step A20, detecting whether each acquisition value is greater than a preset threshold value;
after the acquisition values are obtained, the headphone device may detect whether each acquisition value is greater than a preset threshold. The preset threshold value can be set as required, and when the acquisition value of the contact sensor is greater than the preset threshold value, the earphone equipment at the contact sensor is normally contacted with the ears of the user.
Step A30, if at least one of the collected values is greater than the preset threshold, determining that the earphone device is in a wearing state.
And if at least one of the acquired values is detected to be greater than a preset threshold value, determining that the earphone equipment is in a wearing state. Or, in other embodiments, it may also be set that the headset device is determined to be in the wearing state only when at least half of the collected values are greater than the preset threshold, so as to avoid that the headset device is erroneously determined to be in the wearing state when the user touches the headset by mistake.
Further, in an embodiment, before the step of acquiring the first external signal leaked into the cavity from the outside, the step S10 further includes:
step A40, when detecting that the earphone equipment is in a wearing state and at least one acquisition value is not greater than the preset threshold value, starting a frequency response calibration mode of the earphone equipment;
the earphone device may determine whether the earphone device is normally worn when it is detected that the earphone is in a worn state, and specifically, may detect whether a collection value of at least one contact sensor is not greater than a preset threshold. If the acquisition value of at least one contact sensor is not greater than the preset threshold value, it is indicated that at least one part of the earphone equipment and the ear of the user is not completely attached, and the problem of wearing leakage may exist, and at the moment, the earphone equipment can start a frequency response calibration mode.
The earphone device can be provided with a function of turning on and off a frequency response calibration mode, and when the earphone device detects that the earphone device is in a wearing state and a collection value of at least one contact sensor is not larger than a preset threshold value, the frequency response calibration mode can be turned on. Further, when the acquisition values of all the contact sensors are larger than the preset threshold value, the earphone device is completely attached to the ears of the user, the problem of wearing leakage does not exist, and the frequency response calibration mode can be closed by the earphone device at the moment so as to save the computing resources of the earphone device.
The step of acquiring a first external signal leaked into the cavity from the outside and received by the error microphone in the step S10 includes:
step S103, in the frequency response calibration mode, acquiring a first external signal, which is received by the error microphone and leaks into the cavity from the outside, from the outside.
The earphone device may obtain the first external signal received by the error microphone only when the earphone device is in the frequency response calibration mode, and the obtaining of the first external signal and the subsequent frequency response calibration step are not performed when the frequency response calibration mode is closed.
Further, in an embodiment, before the step of turning on the frequency response calibration mode of the earphone device in step a40, the method further includes:
step A50, when detecting that the earphone equipment is in a wearing state and at least one acquisition value is not greater than the preset threshold value, outputting prompt information to prompt a user to wear the earphone correctly;
when the earphone device detects that the earphone device is in a wearing state and at least one acquisition value is not larger than a preset threshold value, prompt information can be output firstly, and a user is prompted to correctly wear the earphone through the prompt information, so that the user can avoid wearing the leakage problem by actively adjusting the wearing mode of the earphone. The prompt message can be a voice prompt or a prompt tone prompt, or can be a prompt message in a text form displayed by a main device connected with the earphone device.
Step A60, accumulating the duration of the state that the earphone equipment is in a wearing state and at least one acquisition value is not greater than the preset threshold value after the prompt information is output;
the state that the earphone equipment is in a wearing state and the acquisition value of at least one contact sensor is not larger than the preset threshold value is called as an abnormal wearing state, the duration of the abnormal wearing state can be accumulated after the earphone equipment outputs the prompt information, namely, after the prompt information is output, the user is waited to adjust the wearing mode, and the duration of the waiting is accumulated.
When the duration time does not reach the preset duration time, but the acquisition value of each contact sensor is greater than the preset threshold value (namely, in a normal wearing state), the earphone equipment can terminate timing and keep the closing state of the frequency response calibration mode. The preset duration may be set according to needs, and is not limited herein.
Step a70, when it is detected that the duration reaches a preset duration, executing the step a40 of turning on the frequency response calibration mode of the earphone device.
When the duration is detected to reach the preset duration, the wearing state of the user is still not adjusted to be the normal wearing state after the user lasts for a long time, at the moment, the earphone equipment can start a frequency response calibration mode to calibrate the frequency response of the earphone equipment, and therefore the problem that the audio tone quality received by the user is influenced due to the fact that the earphone is worn and leaked when the user cannot adjust to the normal wearing state or ignore prompt information is avoided.
In addition, an embodiment of the present invention further provides a device for calibrating a frequency response of a headphone, where referring to fig. 3, the device is disposed in a headphone apparatus, the headphone apparatus includes an error microphone, the error microphone is disposed in a sound-producing direction of a speaker of the headphone apparatus, and the device includes:
the acquiring module 10 is configured to acquire, when it is detected that the earphone device is in a wearing state, a first external signal, which is received by the error microphone and leaks into a cavity from the outside, where the cavity is formed by the earphone device and an ear canal of a user when the earphone device is in the wearing state;
the gain module 20 is configured to obtain a preset gain coefficient, and perform gain processing on the first external signal by using the gain coefficient to obtain a compensation signal;
a calibration module 20, configured to compensate the compensation signal to an audio path of the speaker, so as to perform frequency response calibration on the earphone device.
Further, the obtaining module 10 includes:
a first acquisition unit configured to acquire a microphone reception signal received by the error microphone;
and the removing unit is used for removing the output signal of the current audio channel of the loudspeaker from the microphone receiving signal to obtain the first external signal leaked into the cavity from the outside.
Further, the apparatus further comprises:
the playing module is used for playing a test signal through the loudspeaker when the earphone equipment is worn on a test ear for each test, wherein the sealing degree of a cavity formed between the earphone equipment and the test ear is different during each test;
the obtaining module 10 is further configured to obtain a frequency response signal received by the test ear and a second external signal received by the error microphone during each test;
and the calculation module is used for calculating a relation coefficient between the attenuation amount of the frequency response signal and the second external signal through each group of frequency response signals and the second external signal, and setting the relation coefficient as the gain coefficient in the earphone equipment.
Further, the calculation module is further configured to set the relationship coefficient in the headset device as a gain coefficient corresponding to a frequency band of the test signal;
the gain module 20 includes:
the second acquisition unit is used for acquiring an output signal of the current audio channel of the loudspeaker and determining the frequency band of the output signal;
and the third acquisition unit is used for acquiring a preset gain coefficient corresponding to the frequency band of the output signal.
Further, the acquiring module 10 is further configured to acquire acquired values of a plurality of contact sensors disposed in a headset head in the headset device;
the device further comprises:
the detection module is used for detecting whether each acquisition value is larger than a preset threshold value or not;
and the determining module is used for determining that the earphone equipment is in a wearing state if at least one acquisition value in the acquisition values is greater than the preset threshold value.
Further, the apparatus further comprises:
the starting module is used for starting a frequency response calibration mode of the earphone equipment when the earphone equipment is detected to be in a wearing state and at least one acquisition value is not larger than the preset threshold value;
the obtaining module 10 is further configured to:
and under the frequency response calibration mode, acquiring a first external signal which is received by the error microphone and leaks into the cavity from the outside.
Further, the apparatus further comprises:
the output module is used for outputting prompt information to prompt a user to correctly wear the earphone when the earphone device is detected to be in a wearing state and at least one acquisition value is not greater than the preset threshold value;
the accumulation module is used for accumulating the duration of the state that the earphone equipment is in a wearing state and at least one acquisition value is not greater than the preset threshold value after the prompt information is output;
the starting module is further used for starting a frequency response calibration mode of the earphone device when the duration is detected to reach a preset duration.
The extension of the specific implementation of the device for calibrating the frequency response of the earphone of the present invention is substantially the same as that of each embodiment of the method for calibrating the frequency response of the earphone, and is not described herein again.
The earphone device comprises a structural shell, a communication module, a main control module (such as a Micro Control Unit (MCU)), a loudspeaker, a call microphone, a memory and the like. The main control module can comprise a microprocessor, an audio decoding unit, a power supply and power supply management unit, a sensor and other active or passive devices required by the system and the like (which can be replaced, deleted or added according to actual functions), so that the wireless audio receiving and playing functions are realized. The headset may establish a communication connection with the user terminal and other headset devices through the communication module. The memory of the headset may have a headset communication program stored therein, and the microprocessor may be configured to invoke the headset communication program stored in the memory and perform the following operations:
when the earphone device is detected to be in a wearing state, acquiring a first external signal which is received by the error microphone and leaks into a cavity from the outside, wherein the cavity is formed by the earphone device and an ear canal of a user when the earphone device is in the wearing state;
acquiring a preset gain coefficient, and performing gain processing on the first external signal by adopting the gain coefficient to obtain a compensation signal;
compensating the compensation signal to an audio path of the speaker to perform frequency response calibration on the earphone device.
Further, the acquiring the first signal received by the error microphone and leaked into the cavity from the outside includes:
acquiring a microphone receiving signal received by the error microphone;
and removing the output signal of the current audio channel of the loudspeaker from the microphone receiving signal to obtain the first outside signal leaked into the cavity from the outside.
Further, before the preset gain coefficient is obtained and the external signal is subjected to gain processing by using the gain coefficient to obtain the compensation signal, the microprocessor may be further configured to call an earphone communication program stored in the memory, and execute the following operations:
when the earphone equipment is worn on a test ear for each test, playing a test signal through the loudspeaker, wherein the sealing degree of a cavity formed between the earphone equipment and the test ear is different during each test;
acquiring a frequency response signal received by the test ear and a second external signal received by the error microphone during each test;
and calculating a relation coefficient between the attenuation amount of the frequency response signal and the second external signal through each group of the frequency response signal and the second external signal, and setting the relation coefficient as the gain coefficient in the earphone equipment.
Further, the setting the relationship coefficient as the gain coefficient in the headphone apparatus includes:
setting the relation coefficient as a gain coefficient corresponding to the frequency band of the test signal in the earphone device;
the obtaining of the preset gain factor includes:
acquiring an output signal of a current audio channel of the loudspeaker, and determining a frequency band of the output signal;
and acquiring a preset gain coefficient corresponding to the frequency band of the output signal.
Further, before the first external signal leaked into the cavity from the outside and received by the error microphone is acquired when the headset device is detected to be in a wearing state, the microprocessor may be further configured to call a headset communication program stored in the memory, and perform the following operations:
acquiring acquisition values of a plurality of contact sensors arranged on a headset head in the headset device;
detecting whether each acquisition value is larger than a preset threshold value or not;
and if at least one of the acquired values is larger than the preset threshold value, determining that the earphone equipment is in a wearing state.
Further, before acquiring the first external signal leaked into the cavity from the outside and received by the error microphone, the microprocessor may be further configured to call an earphone communication program stored in the memory, and perform the following operations:
when the earphone equipment is detected to be in a wearing state and at least one acquisition value is not larger than the preset threshold value, starting a frequency response calibration mode of the earphone equipment;
the acquiring a first external signal which is received by the error microphone and leaks into the cavity from the outside comprises:
and under the frequency response calibration mode, acquiring a first external signal which is received by the error microphone and leaks into the cavity from the outside.
Further, before the frequency response calibration mode of the headset device is turned on, the microprocessor may be further configured to call a headset communication program stored in the memory, and perform the following operations:
when the earphone equipment is detected to be in a wearing state and at least one acquisition value is not larger than the preset threshold value, outputting prompt information to prompt a user to wear the earphone correctly;
accumulating the duration of the state that the earphone equipment is in a wearing state and at least one acquisition value is not greater than the preset threshold value after the prompt information is output;
and when the duration is detected to reach the preset duration, executing the frequency response calibration mode for starting the earphone equipment.
In addition, an embodiment of the present invention further provides a computer-readable storage medium, where the storage medium stores a headset frequency response calibration program, and the headset frequency response calibration program, when executed by a processor, implements the following steps of the headset frequency response calibration method.
The embodiments of the headset device and the computer-readable storage medium of the present invention can refer to the embodiments of the headset frequency response calibration method of the present invention, and are not described herein again.
It should be noted that, in this document, 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 phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
Through the description of the foregoing embodiments, it is clear to those skilled in the art that the method of the foregoing embodiments may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solutions of the present invention or portions thereof contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are also included in the scope of the present invention.
Claims (10)
1. A headphone frequency response calibration method, applied to a headphone device including an error microphone disposed in a sound emission direction of a speaker of the headphone device, the method comprising the steps of:
when the earphone device is detected to be in a wearing state, acquiring a first external signal which is received by the error microphone and leaks into a cavity from the outside, wherein the cavity is formed by the earphone device and an ear canal of a user when the earphone device is in the wearing state;
acquiring a preset gain coefficient, and performing gain processing on the first external signal by adopting the gain coefficient to obtain a compensation signal;
and compensating the attenuation amount of the frequency response to an audio channel of the loudspeaker according to the compensation signal so as to calibrate the frequency response of the earphone equipment.
2. The method for calibrating a frequency response of a headset of claim 1, wherein the step of acquiring a first signal received by the error microphone and leaking into the cavity from the outside comprises:
acquiring a microphone receiving signal received by the error microphone;
and removing the output signal of the current audio channel of the loudspeaker from the microphone receiving signal to obtain the first outside signal leaked into the cavity from the outside.
3. The method for calibrating a frequency response of a headset according to claim 1, wherein before the step of obtaining the preset gain factor and performing the gain processing on the external signal by using the gain factor to obtain the compensation signal, the method further comprises:
when the earphone equipment is worn on a test ear for each test, playing a test signal through the loudspeaker, wherein the sealing degree of a cavity formed between the earphone equipment and the test ear is different during each test;
acquiring a frequency response signal received by the test ear and a second external signal received by the error microphone during each test;
and calculating a relation coefficient between the attenuation amount of the frequency response signal and the second external signal through each group of the frequency response signal and the second external signal, and setting the relation coefficient as the gain coefficient in the earphone equipment.
4. The headphone frequency response calibration method as recited in claim 3, wherein the step of setting the relationship coefficients as the gain coefficients in the headphone device comprises:
setting the relation coefficient as a gain coefficient corresponding to the frequency band of the test signal in the earphone device;
the step of obtaining the preset gain factor comprises:
acquiring an output signal of a current audio channel of the loudspeaker, and determining a frequency band of the output signal;
and acquiring a preset gain coefficient corresponding to the frequency band of the output signal.
5. The method for calibrating earphone frequency response according to any one of claims 1 to 4, wherein the step of acquiring the first external signal received by the error microphone and leaked from the outside into the cavity when the earphone device is detected to be in the wearing state further comprises:
acquiring acquisition values of a plurality of contact sensors arranged on a headset head in the headset device;
detecting whether each acquisition value is larger than a preset threshold value or not;
and if at least one of the acquired values is larger than the preset threshold value, determining that the earphone equipment is in a wearing state.
6. The method for calibrating a frequency response of a headset of claim 5, wherein the step of acquiring the first ambient signal received by the error microphone and leaked into the cavity from the outside further comprises:
when the earphone equipment is detected to be in a wearing state and at least one acquisition value is not larger than the preset threshold value, starting a frequency response calibration mode of the earphone equipment;
the step of acquiring a first external signal which is received by the error microphone and leaks into the cavity from the outside comprises the following steps:
and acquiring a first external signal which is received by the error microphone and leaks into the cavity from the outside in the frequency response calibration mode.
7. The method for calibrating the frequency response of a headset of claim 6, wherein the step of turning on the frequency response calibration mode of the headset device is preceded by the steps of:
when the earphone equipment is detected to be in a wearing state and at least one acquisition value is not larger than the preset threshold value, outputting prompt information to prompt a user to wear the earphone correctly;
accumulating the duration of the state that the earphone equipment is in a wearing state and at least one acquisition value is not greater than the preset threshold value after the prompt message is output;
and when the duration is detected to reach the preset duration, executing the step of starting the frequency response calibration mode of the earphone equipment.
8. An apparatus for calibrating a frequency response of a headphone, the apparatus being disposed in a headphone device, the headphone device including an error microphone, the error microphone being disposed in a sound emission direction of a speaker of the headphone device, the apparatus comprising:
the acquisition module is used for acquiring a first external signal which is received by the error microphone and leaks into a cavity from the outside when the earphone device is detected to be in a wearing state, wherein the cavity is formed by the earphone device and an ear canal of a user when the earphone device is in the wearing state;
the gain module is used for acquiring a preset gain coefficient and performing gain processing on the first external signal by adopting the gain coefficient to obtain a compensation signal;
and the calibration module is used for compensating the attenuation amount of the frequency response to the audio channel of the loudspeaker according to the compensation signal so as to calibrate the frequency response of the earphone equipment.
9. An earphone device, characterized in that the earphone device comprises: a memory, a processor and a headset frequency response calibration program stored on the memory and executable on the processor, the headset frequency response calibration program when executed by the processor implementing the steps of the headset frequency response calibration method according to any one of claims 1 to 7.
10. A computer readable storage medium, having stored thereon a headset frequency response calibration program which, when executed by a processor, carries out the steps of the headset frequency response calibration method according to any one of claims 1 to 7.
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| CN202111264458.4A CN113794965B (en) | 2021-10-28 | 2021-10-28 | Earphone frequency response calibration method and device, earphone equipment and storage medium |
| PCT/CN2021/140842 WO2023070920A1 (en) | 2021-10-28 | 2021-12-23 | Earphone frequency response calibration method and apparatus, and earphone device and storage medium |
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| CN117119358B (en) * | 2023-10-17 | 2024-01-19 | 武汉市聚芯微电子有限责任公司 | Compensation method and device for sound image offset side, electronic equipment and storage equipment |
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