WO2023035626A1

WO2023035626A1 - Method and apparatus for adjusting volume of earphone, and earphone

Info

Publication number: WO2023035626A1
Application number: PCT/CN2022/089539
Authority: WO
Inventors: 迟欣; 吴海全; 曹磊; 何桂晓; 郭世文
Original assignee: 深圳市冠旭电子股份有限公司; 深圳市飞科笛系统开发有限公司
Priority date: 2021-09-10
Filing date: 2022-04-27
Publication date: 2023-03-16
Also published as: CN113938795A; CN113938795B

Abstract

Provided in the present application are a method and apparatus for adjusting the volume of an earphone, and an earphone, which are applicable to the technical field of earphones. The method comprises: acquiring an audio digital signal, and calculating an output sound press level of an earphone; calculating a noise sound press level according to an ambient noise signal; acquiring a safe sound press level according to the noise sound press level; and adjusting the output sound press level according to the safe sound press level. The present application can be applied to a smart earphone. By means of the present application, a corresponding safe sound press level can be obtained according to a noise sound press level, and an output sound press level of an earphone is simultaneously calculated; and with reference to the safe sound press level, the output sound press level of the earphone is adjusted, such that the present application can not only ensure that users can hear clearly, but is also conducive to protecting the hearing of the users.

Description

Method and device for adjusting earphone volume and earphone

This application claims the priority of the Chinese patent application with the application number 202111060917.7 and the title of the invention "Method, device, earphone and storage medium for adjusting earphone volume" filed at the China Patent Office on September 10, 2021, the entire content of which Incorporated in this application by reference.

technical field

The present application relates to the technical field of earphones, in particular to a method and device for adjusting earphone volume and earphones.

Background technique

The statements herein merely provide background information related to the present application and may not necessarily constitute prior art. At present, the number of people wearing headphones is increasing, and there are more and more usage scenarios. Some children have begun to use headphones in their study and life. However, most people usually do not have the concept of hearing protection. In order to hear more clearly and cover the surrounding noise, etc., the volume of the earphones is turned up, which makes the sound field output of the earphones too strong, and long-term use is likely to cause hearing loss.

Since many people's ears are not very sensitive to sound, they cannot judge the sound pressure level subjectively during the listening process. Even people with sensitive ears may not be able to accurately judge whether the volume is too loud after their ears have adapted to the high-volume environment after listening to it for a long time.

The relevant hearing protection earphones on the market usually limit the maximum output sound pressure level so as to achieve the effect that the instantaneous sound pressure will not be too high, for example, limit the sound pressure level (SPL) to below 85dB. But in some quiet scenes, 85dB is quite high volume. The impact of human hearing is not only related to the instantaneous sound pressure, but also closely related to the listening time. Generally speaking, the lower the listening sound pressure level and the shorter the listening time, the healthier the listening.

However, the sound pressure level of listening cannot be reduced without limit. The ideal effect is to hear clearly and protect hearing.

technical problem

One of the purposes of the embodiments of the present application is to provide a method and device for adjusting the volume of earphones and earphones, aiming at solving the problem of poor output sound pressure level of earphones.

technical solution

In order to solve the above-mentioned technical problems, the technical solution adopted in the embodiment of the present application is:

In the first aspect, a method for adjusting the earphone volume is provided, including:

Obtain the audio digital signal input to the earphone; calculate the output sound pressure level of the earphone according to the audio digital signal; obtain the environmental noise signal; calculate the noise sound pressure level according to the environmental noise signal;

According to the noise sound pressure level, obtain the corresponding safe sound pressure level; adjust the output sound pressure level according to the safe sound pressure level.

In one embodiment, calculating the output sound pressure level of the earphone according to the audio digital signal includes: obtaining the frequency response curve of the earphone;

According to the frequency response curve, the frequency response weighting process is performed on the audio digital signal to obtain the original sound pressure level of the audio digital signal relative to the eardrum reference point after passing through the earphone; according to the selected frequency weighting method, the original sound pressure level relative to the eardrum reference point is obtained. The pressure level is frequency-weighted to obtain the output sound pressure level of the earphone at the eardrum of the human ear. Frequency weighting methods include A weighting, B weighting, C weighting or linear weighting.

As a possible implementation, after obtaining the original sound pressure level of the audio digital signal relative to the eardrum reference point after passing through the earphone, it also includes:

Convert the original sound pressure level relative to the reference point of the tympanic membrane into the original sound pressure level under the scattering field; according to the selected frequency weighting method, carry out frequency weighting on the original sound pressure level under the scattering field, and obtain the sound pressure level of the earphone under the scattering field output sound pressure level.

Correspondingly, the noise sound pressure level is calculated according to the ambient noise signal, including:

The same frequency weighting method is used to carry out frequency weighting on the environmental noise signal to obtain the noise sound pressure level.

Among them, according to the noise sound pressure level, obtain the corresponding safe sound pressure level, including:

According to the noise sound pressure level, determine the listening environment. The listening environment includes quiet environment, daily environment and strong noise environment; when the listening environment is a quiet environment, the safe sound pressure level is the first safe sound pressure level; when the listening environment For the daily environment, the second safe sound pressure level is determined according to the noise sound pressure level and the preset linear relationship. The preset linear relationship is the linear relationship between the noise sound pressure level and the safe sound pressure level; when the listening environment is a strong noise environment , then calculate the used sound dose of the earphone within the preset time according to the output sound pressure level; determine the third safe sound pressure level according to the noise sound pressure level and the used sound dose.

As a possible implementation, the third safe sound pressure level is determined according to the noise sound pressure level and the used sound dose, including: calculating the ratio of the used sound dose to the reference sound dose within a preset time; , select the corresponding volume output control curve; determine the third safe sound pressure level according to the noise sound pressure level and the selected volume output control curve.

Wherein, adjusting the output sound pressure level according to the safe sound pressure level includes: judging whether the output sound pressure level is less than or equal to the safe sound pressure level; if not, compressing the output sound pressure level to the safe sound pressure level to obtain the compressed sound pressure level ; If yes, judge whether the output sound pressure level of the previous frame is compressed, and if so, restore the compressed sound pressure level to the output sound pressure level, otherwise, do not adjust the output sound pressure level.

Wherein, compressing the output sound pressure level to a safe sound pressure level includes: gradually compressing the output sound pressure level to a safe sound pressure level after a preset startup time;

Wherein, restoring the compressed sound pressure level to the output sound pressure level includes: gradually restoring the compressed sound pressure level to the output sound pressure level after a preset release time.

In the second aspect, a device for adjusting earphone volume is provided, including:

The audio signal acquisition module is used to acquire the audio digital signal input to the earphone;

A noise signal acquisition module, configured to acquire an environmental noise signal;

The sound pressure level analysis module is used to calculate the output sound pressure level of the earphone according to the audio digital signal; it is also used to calculate the noise sound pressure level according to the environmental noise signal;

The output sound pressure level control module is used to obtain a corresponding safe sound pressure level according to the noise sound pressure level, and adjust the output sound pressure level according to the safe sound pressure level.

In a third aspect, an earphone is provided, including: a memory, a processor, and a computer program stored in the memory and operable on the processor;

When the processor executes the computer program, the method for adjusting the earphone volume as described above is implemented.

In a fourth aspect, a computer-readable storage medium is provided, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for adjusting the volume of an earphone as described above is implemented.

In a fifth aspect, a computer program product is provided. When the computer program product runs on the earphone, the earphone is made to execute the method for adjusting the volume of the earphone in the first aspect.

Beneficial effect

The beneficial effect of a method for adjusting the volume of earphones provided by the embodiment of the present application is that the noise sound pressure level is calculated by acquiring the noise signal of the environment, and the corresponding safe sound pressure level is obtained according to the noise sound pressure level. The digital signal calculates the output sound pressure level of the earphone, and adjusts the output sound pressure level of the earphone with reference to the safe sound pressure level, which can not only ensure that the user can hear clearly, but also benefit the user's hearing protection.

For the beneficial effects of the above-mentioned second aspect to the fifth aspect, reference may be made to the related description in the above-mentioned first aspect, which will not be repeated here.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the embodiments or exemplary technical descriptions. Obviously, the accompanying drawings in the following descriptions are only for this application. For some embodiments, those skilled in the art can also obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a flowchart of a method for adjusting the volume of earphones provided by an embodiment of the present application;

FIG. 2 is a volume control curve diagram provided by an embodiment of the present application;

FIG. 3 is another volume control curve diagram provided by an embodiment of the present application;

Fig. 4 is a structural block diagram of a device for adjusting earphone volume provided by an embodiment of the present application;

Fig. 5 is a schematic structural diagram of an earphone provided by an embodiment of the present application.

Embodiments of the present invention

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and/or components, but does not exclude one or more other Presence or addition of features, wholes, steps, operations, elements, components and/or collections thereof. It should also be understood that the term "and/or" used in the description of the present application and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

Reference to "one embodiment" or "some embodiments" or the like in the specification of the present application means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in other embodiments," etc. in various places in this specification are not necessarily All refer to the same embodiment, but mean "one or more but not all embodiments" unless specifically stated otherwise. The terms "including", "comprising", "having" and variations thereof mean "including but not limited to", unless specifically stated otherwise.

This embodiment provides a method for adjusting the volume of earphones, which is suitable for earphones of various styles such as in-ear, semi-in-ear, and head-mounted, and is performed by a device for adjusting the volume of earphones. The modules of the device are integrated in In the headset, or a part of the module is integrated into the headset, and another part of the module is integrated into the terminal device that provides audio.

Fig. 1 is a flow chart of the method for adjusting the earphone volume provided by this embodiment. As shown in Figure 1, the method for adjusting the earphone volume includes the following steps:

S11. Obtain an audio digital signal input to the earphone.

The earphone establishes a wired or wireless connection with electronic devices with multimedia functions such as mobile phones and computers. The electronic device outputs audio to the earphone, and obtains the original audio digital signal input to the earphone through wireless communication, or obtains the audio input to the earphone through wired communication. analog signal, and converts the audio analog signal to an audio digital signal.

S12. Calculate the output sound pressure level of the earphone according to the audio digital signal.

The sound pressure produced by the earphone increases or attenuates with the change of audio frequency, and the relationship between sound pressure and frequency is called frequency response. Each earphone has its audio characteristics. The frequency response curve is one of the parameters representing the audio characteristics of the earphone. The frequency response characteristic of the earphone is measured by an acoustic instrument and stored in the form of a frequency response curve (frequency response curve for short).

Different headphones play the same audio, because of their different frequency response curves, the sound pressure generated is not exactly the same, so it is necessary to perform frequency response weighting processing on the audio digital signal according to the frequency response curve of the headphones, and superimpose the corresponding gain coefficients at different frequencies , to obtain the original sound pressure level of the audio digital signal after passing through the earphone. For example, for the same -6dB signal, the output sound pressure level is different when driving 1Khz and 6Khz. A specific weighting algorithm may use a time-domain weighting algorithm, or may use a frequency-domain weighting algorithm.

If the earphone is placed in the artificial ear device to test the sound pressure level, the sound pressure level measured at the eardrum reference point of the artificial ear device is the original sound pressure level of the audio digital signal relative to the eardrum reference point after passing through the earphone.

However, the human ear's subjective perception of the response to different frequencies is not flat, and the original sound pressure level measured at this time is the sound pressure level measured by the instrument, not the sound pressure level felt by the human ear. Therefore, it is necessary to perform frequency weighting on the original sound pressure level according to the health requirements of different groups of people, different listening environments and/or different health standards for sound pressure levels. The sound pressure level obtained after frequency weighting is closer to the human ear experience sound pressure level. If the earphone is worn on the human ear, frequency weighting is performed on the original sound pressure level relative to the reference point of the tympanic membrane to obtain the output sound pressure level of the earphone at the tympanic membrane of the human ear.

Some health standards use the sound pressure level under the scattering field as the sound pressure level measurement standard, then it is necessary to convert the original sound pressure level relative to the eardrum reference point into the original sound pressure level under the scattering field, and add the eardrum reference point to the scattering transitions between fields. Using a modified transfer function from the tympanic membrane reference point to the diffuse field, the original sound pressure level relative to the eardrum reference point is converted to the original sound pressure level under the diffuse field. According to the selected frequency weighting method, the original sound pressure level under the scattering field is frequency-weighted to obtain the output sound pressure level of the earphone under the scattering field.

Similarly, the original sound pressure level at the eardrum reference point can be converted to the original sound pressure level under the corresponding sound field according to the different sound fields used.

Frequency weighting methods include A weighting, B weighting, C weighting or linear weighting. A-weighting, B-weighting, and C-weighting correspond to the equal-loudness curves of 40-square, 70-square, and 100-square pure tones respectively, and linear weighting means that no weighting network is used. The equal-loudness curve is stored in the earphone, and an appropriate frequency weighting method is selected for frequency weighting according to the crowd, listening environment and/or health standards. For example, A-weighting is selected for normal environments, C-weighting is selected for high-noise environments, and so on.

As another possible implementation manner, after obtaining the original sound pressure level of the audio digital signal passing through the earphone, the method further includes: calibrating the original sound pressure level according to the speaker calibration data of the earphone. Specifically, due to individual differences in earphones, especially differences in devices, there will be a certain deviation in the output sound pressure level of individual products under the same conditions. By calibrating each speaker during the production process, and storing the calibration data in the earphone The storage module can achieve more accurate sound pressure level calculation by compensating the speaker output during use.

S13. Acquire an environmental noise signal.

Use the microphone carried by the earphone to pick up the external environmental sound, or use the microphone of the terminal device connected to the earphone to pick up the external environmental sound to obtain the environmental noise signal.

S14. Calculate the noise sound pressure level according to the environmental noise signal.

Frequency weighting is performed on the environmental noise signal to obtain the noise sound pressure level. In order to make the noise sound pressure level more comparable to the output sound pressure level of the earphone, the same frequency weighting method as the audio digital signal is used for frequency weighting of the environmental noise signal.

S15. Obtain a corresponding safe sound pressure level according to the noise sound pressure level.

According to the noise sound pressure level, determine the listening environment. Determine the safe sound pressure level according to the listening environment, and prevent the ears from being damaged by strong sounds while obtaining a better signal-to-noise ratio.

In this embodiment, the listening environment is divided into quiet environment, daily environment and strong noise environment. Quiet environment such as library, bedroom at night, etc., daily environment such as coffee shop, office, etc., strong noise environment such as construction site, highway with heavy traffic, etc. Exemplarily, the noise sound pressure level is less than 50dB is a quiet environment, the noise sound pressure level is between 50dB-70dB is a daily environment, and the noise sound pressure level is greater than 70dB is a strong noise environment.

FIG. 2 is a volume control curve diagram provided by this embodiment.

When the listening environment is a quiet environment, the safe sound pressure level is the first safe sound pressure level. In this embodiment, as shown in section X in FIG. 2 , the first safe sound pressure level is 70 dB. In practical applications, it can also be properly raised or lowered according to the user's listening habits.

When the listening environment is a daily environment, the second safe sound pressure level is determined according to the noise sound pressure level and the preset linear relationship, and the preset linear relationship is the linear relationship between the noise sound pressure level and the safe sound pressure level, as shown in Figure 2 Shown in section Y.

When the listening environment is a strong noise environment, the third safe sound pressure level can be determined according to the Z section in Fig. 2 .

As an embodiment of the present application, in a strong noise environment, the used sound dose of the earphone within a preset time is calculated according to the output sound pressure level. Compared with the reference sound dose within the same preset time, when the remaining available sound dose is sufficient and the external environment noise is large, a higher sound pressure level can be used for listening. When the used sound dose is close to or exceeds the limit, it is necessary to appropriately reduce the safe output sound pressure level to protect hearing.

Sound Exposure, also known as Dosage, refers to the time integral of the square of sound pressure within a certain time interval (between t1 and t2) or process. sound dose

dt; PA(t) is the instantaneous A-weighted sound pressure of the audio signal, t=t2-t1. The sound pressure level is the logarithm of the ratio of the sound pressure to the reference sound pressure, in decibels dB, the reference sound pressure p is usually 20μPa,

The corresponding sound pressure is calculated according to the output sound pressure level, and the sound dose can be obtained by time integrating the square of the sound pressure.

Specifically, according to the noise sound pressure level and the used sound dose, determine the third safe sound pressure level, including:

Calculate the ratio of the used sound dose to the reference sound dose within the preset time. According to the range of the ratio, select the corresponding volume output control curve. Determine the third safe sound pressure level according to the noise sound pressure level and the selected volume output control curve.

Fig. 3 is another volume control curve diagram provided by this embodiment. As shown in Figure 3, the part in the circle is the volume control curve suitable for the environment with strong noise. Exemplarily, the range of the ratio includes a first range (0-75%), a second range (75%-100%) and a third range (above 100%). In FIG. 3 , Z1 is the first volume output control curve corresponding to the first interval, Z2 is the second volume output control curve corresponding to the second interval, and Z3 is the third volume output control curve corresponding to the third interval. For example, when the used sound dose is 50% of the day, use the first volume output control curve Z1 to determine the third safe sound pressure level, and when the used sound dose exceeds 75% that day, use the second volume output control curve Z2 to determine the third safe sound pressure level For the sound pressure level, after the used sound dose of the day exceeds 100%, use the third volume output control curve Z3 to determine the third safe sound pressure level.

S16, adjusting the output sound pressure level according to the safe sound pressure level.

The safe sound pressure level of the earphone is the maximum volume that the earphone can output. Users can use the volume plus/minus buttons to adjust the volume, but when the output sound pressure level exceeds the safe sound pressure level, the output sound pressure level will be suppressed to Safe sound pressure level.

Specifically, it is judged whether the output sound pressure level is less than or equal to the safe sound pressure level. If not, the sound pressure level compression algorithm can be used to compress the output sound pressure level to a safe sound pressure level to obtain the compressed sound pressure level. If yes, judge whether the output sound pressure level of the last audio digital signal is compressed, and if yes, restore the compressed sound pressure level to the output sound pressure level; otherwise, do not adjust the output sound pressure level, and play according to the output sound pressure level selected by the user audio.

For example, if the output sound pressure level of the earphone is less than or equal to the safe sound pressure level, the output sound pressure level is not adjusted, and the audio is played according to the output sound pressure level selected by the user. When the user increases the volume of the earphone to exceed the safe sound pressure level, the output sound pressure level of the earphone will be compressed to the safe sound pressure level, and the attenuation is the difference between the output sound pressure level and the safe sound pressure level. Compressed sound pressure level = output sound pressure level - attenuation. Afterwards, if the user reduces the volume of the earphone playback (or the volume of the audio itself) so that it is lower than the safe sound pressure level, it is obviously unreasonable to continue to compress the volume, which may affect the user's listening experience, then gradually reduce it The amount of attenuation restores the volume from the compressed sound pressure level to the proper output sound pressure level.

In this embodiment, on the basis of the conventional method of testing the sound pressure level of earphones, an appropriate frequency weighting method is selected to carry out frequency weighting on the original sound pressure level processed by the frequency response of the earphones to obtain the output sound pressure level of the earphones, and the frequency weighting simulation It improves the response of the human ear to pure tones of different loudness, making the final sound pressure level closer to the real feeling of the human ear. The volume adjustment suggestion made based on the output sound pressure level is closer to the user's real use scenario and is more conducive to the user's hearing protection.

As a possible implementation, the method is improved on the basis of the above-mentioned embodiments. In order to avoid sudden changes in the volume when the output sound pressure level is adjusted, it is necessary to adopt certain means to make the volume change more gentle and sound more comfortable.

Specifically, compressing the output sound pressure level to a safe sound pressure level includes: gradually compressing the output sound pressure level to a safe sound pressure level after a preset startup time.

Attack time refers to the time it takes for the current output sound pressure level to gradually compress to the safe sound pressure level when the output sound pressure level increases and is higher than the safe sound pressure level. For example, if the current ambient noise is 50dB, the current safe sound pressure level is 70dB, and the audio to be played next is 80dB, the startup time is the time it takes to gradually compress the output sound pressure level from 80dB to 70dB.

Specifically, restoring the compressed sound pressure level to the output sound pressure level includes: gradually restoring the compressed sound pressure level to the output sound pressure level after a preset release time.

When the output sound pressure level decreases and is lower than the safe sound pressure level, it is judged whether the output sound pressure level of the last audio digital signal is compressed, and if so, the compressed sound pressure level will be restored to the output sound pressure level, and the release time (Release Time) is the time it takes for the compressed sound pressure level to return to the output sound pressure level. For example, the current ambient noise is 50dB, the current safe sound pressure level is 70dB, and the output sound pressure level of the last audio digital signal is 80dB. The attenuation of compressing the output sound pressure level to the safe sound pressure level is -10dB, and the compressed sound pressure level is obtained. The pressure level is 70dB. The output sound pressure level of the audio digital signal in the next frame changes to 65dB, which is already lower than the safe sound pressure level. If you continue to compress according to the attenuation of -10dB, the compressed sound pressure level will be 55dB, which will affect the user's listening To feel, you need to gradually restore the compressed sound pressure level to the output sound pressure level, and the release time is the time it takes to restore the compressed sound pressure level from 55dB to the output sound pressure level of 65dB.

In other embodiments, it also includes: displaying the output sound pressure level through the number and/or color of the indicator light of the earphone, or displaying the output sound pressure level through the display of the earphone, or through the communication connection with the electronic device, the output sound pressure level The grade is sent to the electronic device for display. The displayed output sound pressure level can be the instantaneous actual output sound pressure level, or the equivalent sound pressure level for a period of time.

For example, the equivalent continuous A-weighted sound pressure level of the sound dose E in the time integration interval T=t2-t1

PA(t) is the instantaneous A-weighted sound pressure of the audio signal, and p is the reference sound pressure of 20μPa.

Corresponding to the method for adjusting the volume of the earphone in the above embodiment, FIG. 4 shows a structural block diagram of the device for adjusting the volume of the earphone provided by the embodiment of the present application. For the convenience of description, only the parts related to the embodiment of the present application are shown.

Referring to Figure 4, the device includes:

The audio signal acquisition module 21 is configured to acquire the audio digital signal input to the earphone.

The noise signal acquisition module 22 is configured to acquire environmental noise signals.

The sound pressure level analysis module 23 is used to calculate the output sound pressure level of the earphone according to the audio digital signal. It is also used to calculate the noise sound pressure level based on the environmental noise signal.

The output sound pressure level control module 24 is configured to obtain a corresponding safe sound pressure level according to the noise sound pressure level, and adjust the output sound pressure level according to the safe sound pressure level.

Wherein, the device further includes: a sound dose analysis module 25, which is used to calculate the used sound dose of the earphone within a preset time according to the output sound pressure level.

The output sound pressure level control module 24 includes: an environment determination unit, a safe sound pressure level determination unit and a sound pressure level control unit.

The environment determination unit is used to determine the listening environment according to the noise sound pressure level, and the listening environment includes quiet environment, daily environment and strong noise environment.

The safe sound pressure level determining unit is used for: when the listening environment is a quiet environment, the safe sound pressure level is the first safe sound pressure level. When the listening environment is a daily environment, the second safe sound pressure level is determined according to the noise sound pressure level and a preset linear relationship, and the preset linear relationship is a linear relationship between the noise sound pressure level and the safe sound pressure level. When the listening environment is a strong noise environment, the third safe sound pressure level is determined according to the noise sound pressure level and the used sound dose.

The sound pressure level control unit is used for: judging whether the output sound pressure level is lower than the safe sound pressure level. If not, compress the output sound pressure level to a safe sound pressure level to obtain the compressed sound pressure level. If yes, determine whether the output sound pressure level of the last frame of audio digital signal is compressed, and if yes, restore the compressed sound pressure level to the output sound pressure level, otherwise, do not adjust the output sound pressure level.

As a possible implementation manner, the device for adjusting the volume of the earphone further includes a timing module. The timing module is used for providing the occurrence time of the output sound pressure level when the memory stores the output sound pressure level.

It should be noted that the information interaction and execution process between the above-mentioned devices/units are based on the same concept as the method embodiment of the present application, and its specific functions and technical effects can be found in the method embodiment section. I won't repeat them here.

Those skilled in the art can clearly understand that for the convenience and brevity of description, only the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional modules according to needs. The internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional module in the embodiment can be integrated into one processing unit, or each module can exist separately physically, or two or more modules can be integrated into one unit, and the above-mentioned integrated unit can be implemented in the form of hardware , can also be implemented in the form of software functional units. In addition, the specific names of the functional modules are only for the convenience of distinguishing each other, and are not used to limit the protection scope of the present application. For the specific working process of the modules in the above system, reference may be made to the corresponding process in the foregoing method embodiments, and details are not repeated here.

The embodiment of the present application also provides an earphone. As shown in FIG. 5 , the earphone includes: at least one processor 31, a memory 32, and a computer program stored in the memory 32 and operable on at least one processor, the processor 31. Implement the steps in any of the above method embodiments when the computer program is executed.

The memory 32 stores the frequency response curve of the earphone, and the frequency response curve is obtained by measuring with an acoustic instrument.

As a possible implementation manner, the earphone further includes a display module 34, and the display module 34 is an indicator light or a display for displaying the output sound pressure level. The number of indicator lights may be multiple, and/or the colors of the indicator lights may be multiple.

As a possible implementation manner, the memory 32 stores speaker calibration data of the earphone, and the speaker calibration data of the earphone is used to calibrate the original sound pressure level.

As a possible implementation manner, the earphone further includes a timing module 35, which is configured to provide an occurrence time of the output sound pressure level when the memory 32 stores the output sound pressure level.

As a possible implementation, the earphone also includes a communication module 33, which communicates with the electronic device, and is used to obtain audio digital signals from the electronic device, and is also used to output the output sound pressure level and the time when the output sound pressure level occurs Sent to electronic devices for display and/or storage.

In this embodiment of the application, the earphone may be a smart earphone.

The so-called processor can be a central processing unit (Central Processing Unit, CPU), and the processor can also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC) ), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, and the like.

The memory is the internal storage unit of the earphone, and the memory is used to store the computer program corresponding to the above method embodiment and the data necessary for running the computer program, such as the program code of the computer program, the frequency response curve of the earphone, the equal loudness curve, etc. The memory can also be used to temporarily store data that has been output or will be output.

The embodiment of the present application also provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the steps in the foregoing method embodiments are implemented.

An embodiment of the present application provides a computer program product. When the computer program product runs on the earphone, the mobile terminal implements the steps in the foregoing method embodiments when executed.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the procedures in the methods of the above embodiments in the present application can be completed by instructing related hardware through computer programs, and the computer programs can be stored in a computer-readable storage medium. The computer program When executed by a processor, the steps in the above-mentioned various method embodiments can be realized. Wherein, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file or some intermediate form. The computer-readable medium may at least include: any entity or device capable of carrying computer program codes to a terminal device, a recording medium, a computer memory, a read-only memory (ROM, Read-Only Memory), a random-access memory (RAM, Random Access Memory), electrical carrier signals, telecommunication signals, and software distribution media. Such as U disk, mobile hard disk, magnetic disk or CD, etc. In some jurisdictions, computer readable media may not be electrical carrier signals and telecommunication signals under legislation and patent practice.

In the above-mentioned embodiments, the descriptions of each embodiment have their own emphases, and for parts that are not detailed or recorded in a certain embodiment, refer to the relevant descriptions of other embodiments.

It should be noted that the terms "first" and "second" are used for convenience of description only, and cannot be interpreted as indicating or implying relative importance or implicitly indicating the quantity of technical features. "Plurality" means two or more, unless otherwise clearly and specifically defined.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still implement the foregoing embodiments Modifications to the technical solutions described in the examples, or equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the application, and should be included in the Within the protection scope of this application.

Claims

A method for adjusting earphone volume, characterized in that, comprising:

Obtain the audio digital signal input to the earphone;

calculating the output sound pressure level of the earphone according to the audio digital signal;

Obtain environmental noise signal;

Calculating the noise sound pressure level according to the environmental noise signal;

Obtaining a corresponding safe sound pressure level according to the noise sound pressure level;

The output sound pressure level is adjusted according to the safe sound pressure level.
The method for adjusting earphone volume according to claim 1, wherein calculating the output sound pressure level of the earphone according to the audio digital signal comprises:

Obtain the frequency response curve of the earphone;

Perform frequency response weighting processing on the audio digital signal according to the frequency response curve to obtain the original sound pressure level of the audio digital signal relative to the tympanic membrane reference point after passing through the earphone;

Perform frequency weighting on the original sound pressure level relative to the tympanic membrane reference point according to the selected frequency weighting method to obtain the output sound pressure level of the earphone at the human eardrum;

The frequency weighting method includes A weighting, B weighting, C weighting or linear weighting.
The method for adjusting the volume of earphones according to claim 2, wherein, according to the selected frequency weighting method, frequency weighting is performed on the original sound pressure level relative to the tympanic membrane reference point to obtain the sound pressure level of the earphone at The output sound pressure level at the eardrum of the human ear, including:

Convert the original sound pressure level relative to the tympanic membrane reference point to the original sound pressure level under the scattered field;

According to the selected frequency weighting manner, frequency weighting is performed on the original sound pressure level under the scattering field to obtain the output sound pressure level of the earphone under the scattering field.
The method for adjusting earphone volume according to claim 2, wherein calculating the noise sound pressure level according to the environmental noise signal comprises:

Using the same frequency weighting method, frequency weighting is performed on the environmental noise signal to obtain the noise sound pressure level.
The method for adjusting earphone volume according to claim 1, wherein, according to the noise sound pressure level, obtaining a corresponding safe sound pressure level comprises:

According to the sound pressure level of the noise, the listening environment is determined, and the listening environment includes a quiet environment, a daily environment and a strong noise environment;

When the listening environment is a quiet environment, the safe sound pressure level is the first safe sound pressure level;

When the listening environment is a daily environment, the second safe sound pressure level is determined according to the noise sound pressure level and a preset linear relationship, and the preset linear relationship is the linearity between the noise sound pressure level and the safe sound pressure level relation;

When the listening environment is a strong noise environment, calculate the used sound dose of the earphone within a preset time according to the output sound pressure level; determine according to the noise sound pressure level and the used sound dose The third safe sound pressure level.
The method for adjusting earphone volume according to claim 5, wherein, according to the noise sound pressure level and the used sound dose, determining a third safe sound pressure level comprises:

calculating the ratio of the used sound dose to the reference sound dose within the preset time;

Select the corresponding volume output control curve according to the interval where the ratio is located;

A third safe sound pressure level is determined according to the noise sound pressure level and the selected volume output control curve.
The method for adjusting earphone volume according to claim 1, wherein adjusting the output sound pressure level according to the safe sound pressure level comprises:

judging whether the output sound pressure level is less than or equal to the safe sound pressure level;

If not, gradually compressing the output sound pressure level to the safe sound pressure level after a preset startup time to obtain the compressed sound pressure level;

If so, determine whether the output sound pressure level of the last frame of audio digital signal is compressed, and if so, gradually restore the compressed sound pressure level to the output sound pressure level after a preset release time, otherwise do not adjust the output sound pressure level.
A device for adjusting earphone volume, characterized in that it comprises:

The audio signal acquisition module is used to acquire the audio digital signal input to the earphone;

A noise signal acquisition module, configured to acquire an environmental noise signal;

The sound pressure level analysis module is used to calculate the output sound pressure level of the earphone according to the audio digital signal; it is also used to calculate the noise sound pressure level according to the environmental noise signal;

The output sound pressure level control module is used to obtain a corresponding safe sound pressure level according to the noise sound pressure level, and adjust the output sound pressure level according to the safe sound pressure level.
The device for adjusting earphone volume according to claim 8, wherein the sound pressure level analysis module comprises:

a response curve acquisition unit, configured to acquire the frequency response curve of the earphone;

A frequency response weighting unit, configured to perform frequency response weighting processing on the audio digital signal according to the frequency response curve, to obtain the original sound pressure level of the audio digital signal relative to the tympanic membrane reference point after passing through the earphone;

A frequency weighting unit, configured to perform frequency weighting on the original sound pressure level relative to the tympanic membrane reference point according to the selected frequency weighting method, to obtain the output sound pressure level of the earphone at the human eardrum;

The frequency weighting method includes A weighting, B weighting, C weighting or linear weighting.
The device for adjusting earphone volume according to claim 9, wherein the frequency weighting unit comprises:

A sound pressure conversion subunit, used to convert the original sound pressure level relative to the eardrum reference point into the original sound pressure level under the scattered field;

The frequency weighting subunit is configured to perform frequency weighting on the original sound pressure level under the scattering field according to the selected frequency weighting method, so as to obtain the output sound pressure level of the earphone under the scattering field.
The device for adjusting earphone volume according to claim 9, wherein said calculating the noise sound pressure level according to said environmental noise signal comprises: adopting the same frequency weighting method to calculate the noise sound pressure level of said environmental noise signal Perform frequency weighting to obtain the noise sound pressure level.
The device for adjusting earphone volume according to claim 8, wherein the output sound pressure level control module comprises:

Environment determination unit, safety sound pressure level determination unit and sound pressure level control unit;

The environment determination unit is configured to determine the listening environment according to the noise sound pressure level, and the listening environment includes a quiet environment, a daily environment and a strong noise environment;

The safe sound pressure level determining unit is configured to: when the listening environment is a quiet environment, the safe sound pressure level is the first safe sound pressure level; it is also used to: when the listening environment is a daily environment, then Determine a second safe sound pressure level according to the noise sound pressure level and a preset linear relationship, where the preset linear relationship is a linear relationship between the noise sound pressure level and the safe sound pressure level;

The sound pressure level control unit is used to calculate the used sound dose of the earphone within a preset time according to the output sound pressure level when the listening environment is a strong noise environment; according to the noise sound pressure level and the used sound dose to determine the third safe sound pressure level.
The device for adjusting earphone volume according to claim 12, wherein the sound pressure level control unit comprises:

a ratio calculation unit, configured to calculate the ratio of the used sound dose to the reference sound dose within the preset time;

A curve selection unit, configured to select a corresponding volume output control curve according to the interval of the ratio;

The sound pressure level determining unit is configured to determine a third safe sound pressure level according to the noise sound pressure level and the selected volume output control curve.
The device for adjusting earphone volume according to claim 8, wherein the output sound pressure level control module comprises:

a sound pressure level judging unit, configured to judge whether the output sound pressure level is less than or equal to the safe sound pressure level;

A sound pressure compression unit, configured to gradually compress the output sound pressure level to the safe sound pressure level after a preset start-up time when the output sound pressure level is greater than the safe sound pressure level, to obtain compressed sound pressure Pressure level;

The sound pressure recovery unit is used to determine whether the output sound pressure level of the last audio digital signal is compressed when the output sound pressure level is less than or equal to the safe sound pressure level, and if so, after a preset release time, the The compressed sound pressure level gradually recovers to the output sound pressure level, otherwise the output sound pressure level is not adjusted.
An earphone, characterized by comprising: a memory, a processor, and a computer program stored in the memory and operable on the processor;

The processor implements the method according to any one of claims 1-3 and 5-7 when executing the computer program.