CN113691677A - Audio output control method and device, electronic equipment and storage medium - Google Patents
Audio output control method and device, electronic equipment and storage medium Download PDFInfo
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- CN113691677A CN113691677A CN202110982115.5A CN202110982115A CN113691677A CN 113691677 A CN113691677 A CN 113691677A CN 202110982115 A CN202110982115 A CN 202110982115A CN 113691677 A CN113691677 A CN 113691677A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
- H04M1/72454—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions according to context-related or environment-related conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
- H04M1/72442—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality for playing music files
Abstract
The application discloses a control method and device for audio output, electronic equipment and a storage medium, wherein the control method for audio output is applied to the electronic equipment, the electronic equipment comprises an audio output device, and the control method for audio output comprises the following steps: acquiring the environmental temperature of the current environment of the audio output device as a target temperature; obtaining a transfer function corresponding to the target temperature as a target transfer function, wherein the transfer function is used for representing the corresponding relation between the amplitude and the driving voltage of the audio output device; based on the target transfer function, acquiring a driving voltage corresponding to the maximum amplitude of the audio output device at the target temperature as a maximum driving voltage; and controlling the audio output device to output audio with a driving voltage less than or equal to the maximum driving voltage. The method can protect the audio output device and improve the playing performance of the audio output device.
Description
Technical Field
The present disclosure relates to the field of electronic device technologies, and in particular, to a method and an apparatus for controlling audio output, an electronic device, and a storage medium.
Background
With the rapid progress of the technology level and the living standard, the electronic devices are more and more widely used. Generally, an electronic device has an audio playing function, which can play audio through an audio output device (such as a speaker, etc.), for example, music, a warning sound, a video sound, etc. through the audio output device. However, when the electronic device plays audio, the performance of the audio output device is easily affected by the ambient temperature, so that the playing effect is affected.
Disclosure of Invention
In view of the foregoing, the present application provides a method and an apparatus for controlling audio output, an electronic device, and a storage medium.
In a first aspect, an embodiment of the present application provides a method for controlling audio output, which is applied to an electronic device including an audio output apparatus, and the method includes: acquiring the environmental temperature of the current environment of the audio output device as a target temperature; obtaining a transfer function corresponding to the target temperature as a target transfer function, wherein the transfer function is used for representing the corresponding relation between the amplitude and the driving voltage of the audio output device; based on the target transfer function, acquiring a driving voltage corresponding to the maximum amplitude of the audio output device at the target temperature as a maximum driving voltage; and controlling the audio output device to output audio with a driving voltage less than or equal to the maximum driving voltage.
In a second aspect, an embodiment of the present application provides a control apparatus for audio output, which is applied to an electronic device, where the electronic device includes an audio output apparatus, and the apparatus includes: the device comprises a temperature acquisition module, a function acquisition module, a voltage determination module and a voltage control module, wherein the temperature acquisition module is used for acquiring the ambient temperature of the current environment of the audio output device as a target temperature; the function obtaining module is used for obtaining a transfer function corresponding to the target temperature as a target transfer function, and the transfer function is used for representing the corresponding relation between the amplitude and the driving voltage of the audio output device; the voltage determining module is used for acquiring a driving voltage corresponding to the maximum amplitude of the audio output device at the target temperature based on the target transfer function, and the driving voltage is used as the maximum driving voltage; the voltage control module is used for controlling the audio output device to output audio, and the driving voltage of the audio output device is less than or equal to the maximum driving voltage.
In a third aspect, an embodiment of the present application provides an electronic device, including: one or more processors; a memory; one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs configured to perform the method of controlling audio output as provided in the first aspect above.
In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, where a program code is stored in the computer-readable storage medium, and the program code may be called by a processor to execute the control method for audio output provided in the first aspect.
According to the scheme, the ambient temperature of the current environment where the audio output device is located is obtained to serve as the target temperature, the transfer function corresponding to the target temperature is obtained to serve as the target transfer function, the transfer function is used for representing the corresponding relation between the amplitude of the audio output device and the driving voltage, the driving voltage corresponding to the maximum amplitude of the audio output device at the target temperature is obtained based on the target transfer function, and the driving voltage used as the maximum driving voltage and used for controlling the audio output device to output the audio is smaller than or equal to the maximum driving voltage. Therefore, the driving voltage corresponding to the maximum amplitude can be determined based on the audio output device at different environmental temperatures, the driving voltage of the audio output device is controlled, the stability of the audio output device at different environmental temperatures is guaranteed, and the audio playing effect is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 shows a flow chart of a method of controlling audio output according to an embodiment of the application.
Fig. 2 shows a schematic diagram of experimental results provided in an embodiment of the present application.
Fig. 3 shows a flow chart of a method of controlling audio output according to another embodiment of the present application.
Fig. 4 shows a flow chart of a method of controlling audio output according to yet another embodiment of the present application.
Fig. 5 shows a flowchart of a method of controlling audio output according to yet another embodiment of the present application.
Fig. 6 shows a block diagram of a control device for audio output according to an embodiment of the present application.
Fig. 7 is a block diagram of an electronic device for executing a control method of audio output according to an embodiment of the present application.
Fig. 8 is a storage unit for storing or carrying program codes for implementing a control method of audio output according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
With the rapid development of mobile internet technology, electronic devices (such as smart phones, tablet computers, and the like) cover aspects of life. Moreover, the electronic device can realize more and more functions, for example, the electronic device can realize various functions such as audio playing, video playing, photographing, internet surfing, video chatting, and the like. When people use electronic equipment, audio output devices of the electronic equipment are generally used for playing audio, such as music, video sound, and the like.
In the related technology, the current audio output device mainly adjusts a preset voltage model in audio parameters of a mobile phone under normal temperature and normal pressure to enable various audio signals not to exceed the maximum working amplitude (marked as Xmax) of the audio signals in the amplification process of the audio output device, so as to ensure that the audio output device continuously, safely and stably provides sound signals, and abnormal phenomena such as noise, sound breaking and the like cannot be caused. However, in order to deal with some extreme environments (such as high temperature environment, low pressure environment, etc.), it is often necessary to keep a certain margin (such as the maximum amplitude of the audio output device operation is not more than 80% of Xmax) when presetting the voltage model. In this case, in order to ensure the stability and reliability of the audio output device at a high temperature, that is, to ensure that the amplitude of the audio output device does not exceed Xmax at a high temperature, when a protection model of the audio output device is established, the amplitude may only reach about 80% of Xmax, which is equivalent to sacrificing about 20% of the performance at the normal temperature, and thus the playback effect of the speaker cannot be fully exerted.
In view of the above problems, the inventor provides a method and an apparatus for controlling audio output, an electronic device, and a storage medium, which can determine a driving voltage corresponding to a maximum amplitude based on different ambient temperatures of an audio output device, control the driving voltage of the audio output device, ensure stability of the audio output device at different ambient temperatures, and further improve an audio playing effect. The specific audio output control method is described in detail in the following embodiments.
Referring to fig. 1, fig. 1 is a schematic flowchart illustrating a method for controlling audio output according to an embodiment of the present application. In a specific embodiment, the control method of the audio output is applied to the control apparatus 400 of the audio output shown in fig. 7 and the electronic device 100 (fig. 8) equipped with the control apparatus 400 of the audio output. The following will describe a specific process of this embodiment by taking an electronic device as an example, and it is understood that the electronic device applied in this embodiment may be a smart phone, a tablet computer, a smart watch, smart glasses, a notebook computer, and the like, which is not limited herein. As will be described in detail with respect to the flow shown in fig. 1, the method for controlling audio output may specifically include the following steps:
step S110: and acquiring the environmental temperature of the current environment of the audio output device as a target temperature.
In the embodiment of the present application, since the playing performance of the audio output device of the electronic device may be affected by the ambient temperature, that is, when the temperature changes, the corresponding relationship between the displacement (i.e., the amplitude) of the diaphragm of the audio output device and the driving voltage changes, so that under some extreme temperature conditions, the amplitude of the audio output device may exceed the maximum amplitude, or the maximum amplitude cannot be reached all the time, which results in insufficient playing stability and limited playing performance. Therefore, when the electronic equipment controls the audio output device to work, the electronic equipment can acquire the ambient temperature of the audio output device in the current environment and take the ambient temperature as the target temperature.
In some implementations, the electronic device can determine the ambient temperature based on the I/V data of the audio output device. In other embodiments, a temperature sensor may be disposed in the electronic device at a position adjacent to the audio output device, and the electronic device may obtain the ambient temperature of the current environment through the disposed temperature sensor.
Step S120: and acquiring a transfer function corresponding to the target temperature as a target transfer function, wherein the transfer function is used for representing the corresponding relation between the amplitude and the driving voltage of the audio output device.
In this embodiment of the application, after the electronic device obtains the ambient temperature of the audio output device in the current environment, the electronic device may determine, based on the target temperature, the driving voltage corresponding to the maximum amplitude of the audio output device in the current environment temperature, so as to control the driving voltage of the audio output device during audio output, and protect the amplitude of the audio output device from exceeding the maximum amplitude. Specifically, the electronic device may obtain a transfer function corresponding to a target temperature obtained in advance based on the target temperature, and use the transfer function as the target transfer function. The transfer function is used for representing the corresponding relation between the amplitude of the audio output device and the driving voltage.
In some embodiments, the electronic device stores in advance a correspondence between transfer functions at different temperatures and an ambient temperature, and based on the correspondence, a transfer function corresponding to a target temperature may be acquired. Alternatively, the transfer functions at different ambient temperatures may be obtained by pre-testing. The transfer function can be determined based on the amplitudes and the driving voltages at different environmental temperatures, and therefore the transfer functions at different environmental temperatures can be obtained. The transfer function can be obtained by a manufacturer and stored in the electronic equipment before the electronic equipment leaves a factory; the transfer function may also be stored in the server so that the electronic device may obtain the transfer function from the server.
Of course, the specific manner of determining the target transfer function by the electronic device may not be limited, and the manner may also refer to the contents in the following embodiments.
Step S130: and acquiring a driving voltage corresponding to the maximum amplitude of the audio output device at the target temperature as a maximum driving voltage based on the target transfer function.
In this embodiment of the application, after the electronic device obtains the target transfer function, the electronic device may obtain, as the maximum driving voltage, the driving voltage corresponding to the maximum amplitude of the audio output device based on the target transfer function. Alternatively, the maximum amplitude may be substituted into the target transfer function, so as to obtain the driving voltage corresponding to the maximum amplitude, that is, the maximum driving voltage.
Step S140: and controlling the audio output device to output audio with a driving voltage less than or equal to the maximum driving voltage.
In this embodiment, after obtaining the maximum driving voltage, the electronic device may control the driving voltage for outputting the audio from the audio output device based on the maximum driving voltage, so that the driving voltage of the audio output device does not exceed the maximum driving voltage determined above. It can be understood that, since the above maximum driving voltage is the driving voltage corresponding to the determined maximum amplitude of the audio output device at the current environment temperature, that is, the maximum driving voltage is the driving voltage required by the audio output device when the audio output device obtains the maximum amplitude at the current environment temperature, and the driving voltage of the audio output device is controlled based on the maximum driving voltage, the amplitude of the audio output device can be ensured not to exceed the maximum amplitude, and the audio output device does not need to set the maximum amplitude that can be reached at any environment temperature to be about 80% of the maximum amplitude of the audio output device, thereby fully exerting the playing performance of the audio output device.
The principle of the control method of audio output provided by the present embodiment is demonstrated below with reference to experimental data. Referring to fig. 2, fig. 2 shows the variation curve of the ratio of the amplitude to the driving voltage with the resonant frequency under different temperature conditions, wherein the ordinate is the ratio of the amplitude to the driving voltage (mm/v ), the abscissa is the resonant frequency (Hz, Hz), and the three curves in fig. 2 are the variation curves corresponding to 25 ℃, 60 ℃ and 90 ℃. In the three curves shown in fig. 2, it can be seen that the maximum ratio of amplitude to voltage is different at different temperatures, and therefore the transfer function should be different at different temperatures. Therefore, after the electronic device obtains the target temperature, the electronic device can determine the driving voltage corresponding to the maximum amplitude based on the transfer function corresponding to the target temperature so as to control the driving voltage of the electronic device, thereby ensuring that the amplitude of the audio output device does not exceed the maximum amplitude. The inventor just obtains experimental data through countless experiments, and researches the audio output control method provided by the embodiment of the application.
According to the control method for the audio output, the determined maximum driving voltage is the driving voltage required by the audio output device when the audio output device obtains the maximum amplitude at the current environment temperature, and the driving voltage of the audio output device is controlled based on the maximum driving voltage, so that the amplitude of the audio output device can be ensured not to exceed the maximum amplitude, the audio output device does not need to set the maximum amplitude which can be reached to be about 80% of the maximum amplitude of the audio output device at any environment temperature, and the playing performance of the audio output device is fully exerted.
Referring to fig. 3, fig. 3 is a flow chart illustrating a method for controlling audio output according to another embodiment of the present application. The method for controlling audio output is applied to the electronic device, and will be described in detail with reference to the flow shown in fig. 3, where the method for controlling audio output may specifically include the following steps:
step S210: and acquiring the environmental temperature of the current environment of the audio output device as a target temperature.
In the embodiment of the present application, step S210 may refer to the contents of other embodiments, which are not described herein again.
Step S220: and acquiring a transfer function corresponding to the target temperature as a target transfer function, wherein the transfer function is used for representing the corresponding relation between the amplitude and the driving voltage of the audio output device.
In the embodiment of the present application, the electronic device may compare the target temperature with the reference temperature before performing step S220. The reference temperature may be a normal temperature, for example, 25 ℃. Referring to the experimental result shown in fig. 2 again, based on the experimental data shown in fig. 2, it can be seen that when the temperature is decreased to 25 ℃ relative to the normal temperature, the maximum ratio of the amplitude to the voltage is correspondingly increased, and in each position point before the position point corresponding to the maximum ratio in the three curves, the maximum ratio of the amplitude to the voltage is also correspondingly increased when the temperature is increased to the normal temperature. Therefore, after acquiring the target temperature, the electronic device may compare the target gas temperature with the reference temperature to determine whether the target temperature is greater than the reference temperature according to the comparison result. If the target temperature is higher than the reference temperature, the ratio of the amplitude to the voltage is correspondingly increased relative to the corresponding ratio at the reference temperature, and at this time, the maximum driving voltage is still determined by using the transfer function at the reference temperature, which may result in exceeding the maximum amplitude. If the target temperature is less than or equal to the reference temperature, the ratio of the amplitude to the voltage is correspondingly reduced, and at this time, the maximum driving voltage is still determined by the transfer function at the reference temperature, and the driving voltage of the audio output device is controlled based on the maximum driving voltage, so that the amplitude does not exceed the maximum amplitude.
In some embodiments, since the ratio of the amplitude to the voltage is decreased when the target temperature is lower than the reference temperature, although the amplitude of the audio output device may not exceed the maximum amplitude by using the driving voltage determined by the transfer function at the reference temperature as the maximum driving voltage, the audio output device may not reach the maximum amplitude, and therefore, the driving voltage corresponding to the determined maximum amplitude may be boosted on the basis of the driving voltage corresponding to the determined maximum amplitude, so that the audio output device can exert its performance.
Step S230: and acquiring a driving voltage corresponding to the maximum amplitude of the audio output device at the target temperature as a maximum driving voltage based on the target transfer function.
In the embodiment of the present application, reference may be made to contents of steps S210 to S230 in other embodiments, which are not described herein again.
Step S240: and if the driving voltage for audio output by the audio output device is greater than the maximum driving voltage, reducing the driving voltage for audio output by the audio output device, wherein the reduced driving voltage is less than or equal to the maximum driving voltage.
In some embodiments, when the electronic device controls the driving voltage for audio output by the audio output device based on the maximum driving voltage, the electronic device may compare the driving voltage for audio output by the audio output device, that is, the real-time driving voltage with the maximum driving voltage to obtain a comparison result; determining whether the driving voltage of the audio output device for audio output is greater than the maximum driving voltage according to the comparison result; if the driving voltage of the audio output device for audio output is greater than the maximum driving voltage, the driving voltage of the audio output device for audio output is reduced, so that the reduced driving voltage is less than or equal to the maximum driving voltage, and the amplitude of the audio output device is ensured not to exceed the maximum amplitude.
In a possible implementation manner, the electronic device may control the driving voltage of the audio output device to be the maximum driving voltage when the driving voltage of the audio output device for outputting the audio is greater than the maximum driving voltage, so that the audio output device can reach the maximum amplitude when outputting the audio in the current environment, and the playing performance of the audio output device is fully exerted.
In a possible implementation manner, when determining that the current driving voltage is greater than the maximum driving voltage, the electronic device may determine, based on the current output volume, an amplitude required by the audio output device, and determine, based on the amplitude, a driving voltage corresponding to the amplitude of the audio output device in the current environment, and decrease the driving voltage to the determined driving voltage, thereby ensuring that the audio output device can play audio at the required volume.
In a possible implementation, the electronic device reducing the driving voltage of the audio output device for audio output may include: determining a gain value to be attenuated as a target gain value based on the current driving voltage of the audio output device and the maximum driving voltage; and reducing the gain value in the audio processing by the target gain value so as to reduce the driving voltage of the audio output device for audio output to be the maximum driving voltage. The electronic device may reduce a gain value in the whole sound effect processing link, and may also reduce a gain value in a target low frequency band of the shelf filter (low shelf filter), so as to reduce the driving voltage, and a specific manner may not be limited.
Alternatively, when determining the gain value to be attenuated based on the current driving voltage and the maximum driving voltage of the audio output device, the calculation may be performed based on the correspondence between the voltages and the gain values, for example, if the current driving voltage is V1 and the maximum driving voltage is V2, the gain value to be attenuated is: 20 × lg (v1/v 2). Of course, the specific manner of determining the gain value to be attenuated may not be limited.
It should be noted that, the manner in which the electronic device controls the driving voltage of the audio output device to output audio in the embodiment of the present application may be applied to other embodiments.
In some embodiments, step S210 may be performed every preset time period, that is, the ambient temperature of the current environment of the audio output device is obtained as the target temperature every preset time period. In this manner, when the electronic device executes step S220, step S220 may include: and if the target temperature changes, acquiring a transfer function corresponding to the target temperature as a target transfer function. That is, the acquisition process of the maximum driving voltage is performed when the target temperature is changed.
According to the control method for the audio output, the determined maximum driving voltage is the driving voltage required by the audio output device when the audio output device obtains the maximum amplitude at the current environment temperature, and the driving voltage of the audio output device is controlled based on the maximum driving voltage, so that the amplitude of the audio output device can be ensured not to exceed the maximum amplitude, the audio output device does not need to set the maximum amplitude which can be reached to be about 80% of the maximum amplitude of the audio output device at any environment temperature, and the playing performance of the audio output device is fully exerted.
Referring to fig. 4, fig. 4 is a flow chart illustrating a method for controlling audio output according to another embodiment of the present application. The method for controlling audio output is applied to the electronic device, and will be described in detail with reference to the flow shown in fig. 4, where the method for controlling audio output may specifically include the following steps:
step S310: and acquiring the environmental temperature of the current environment of the audio output device as a target temperature.
In the embodiment of the present application, the step S310 may refer to the contents of the foregoing embodiments, and is not described herein again.
Step S320: and acquiring the current resonant frequency of the audio output device as a target frequency.
In the embodiment of the present application, please refer to the experimental data shown in fig. 2 again, it can be seen that, under different temperature conditions, the ratio of the amplitude of the audio output device to the driving voltage is different when the resonant frequency is different, and therefore, the electronic device may further obtain the current resonant frequency of the audio output device, so as to determine the maximum driving voltage at the current ambient temperature according to the current resonant frequency.
In some embodiments, the electronic device may pass the electrical signal of the audio output device to determine the current resonant frequency of the audio output device from the electrical signal. The electrical signal of the audio output device refers to a current signal flowing through the audio output device and a voltage signal applied to the audio output device, and is generally referred to as an I/V signal. The processor of the electronic device may receive an I/V signal fed back by an audio processing device of the electronic device, where the audio processing device may be a unit configured independently from the processor, for example, a Smart power amplifier (Smart PA), and the like, which is not limited herein.
Optionally, when the electronic device determines the resonant frequency according to the I/V signal of the audio output device, the specific calculation manner of the electronic device may not be limited, for example, the resonant frequency of the audio processing device may be fitted by using a least square method.
Of course, the method of acquiring the current resonance frequency of the audio output device is not limited, and for example, according to the definition of the resonance frequency, that is, the resonance frequency is the frequency corresponding to the point at which the vibration plate vibrates most strongly when the audio output device starts to vibrate from a low range, and when the impedance characteristic of the audio output device is measured, the frequency corresponding to the point at which the impedance value on the impedance curve reaches the maximum value for the first time (that is, Zmax) is referred to as the resonance frequency or the resonance frequency of the audio output device, and the resonance frequency of the audio processing device can be detected according to the definition.
Step S330: and acquiring a transfer function corresponding to the target frequency at the target temperature as a target transfer function, wherein the transfer function is used for representing the corresponding relation between the amplitude and the driving voltage of the audio output device.
In the embodiment of the application, after obtaining the current ambient temperature, that is, the target temperature, and the current resonant frequency, that is, the target frequency, the electronic device may obtain a transfer function corresponding to the target frequency at the target temperature as the target transfer function, so as to determine the maximum driving voltage required to be used at the current ambient temperature according to the target transfer function.
In some embodiments, the electronic device may obtain a correspondence corresponding to the ambient temperature according to a correspondence between resonant frequencies corresponding to different ambient temperatures and a transfer function; and acquiring a transfer function corresponding to the target frequency as a target transfer function based on the corresponding relation corresponding to the environment temperature. Optionally, transfer functions corresponding to different resonant frequencies when different environmental temperatures are obtained through pre-testing may be obtained, where the transfer functions may be determined based on amplitudes and driving voltages at the different environmental temperatures and the resonant frequencies, so that the transfer functions at the different environmental temperatures and the resonant frequencies may be obtained. The transfer function can be obtained by a manufacturer and stored in the electronic equipment before the electronic equipment leaves a factory; the transfer function may also be stored in the server so that the electronic device may obtain the transfer function from the server.
Step S340: and acquiring a driving voltage corresponding to the maximum amplitude of the audio output device at the target temperature as a maximum driving voltage based on the target transfer function.
Step S350: and controlling the audio output device to output audio with a driving voltage less than or equal to the maximum driving voltage.
In the embodiment of the present application, step S340 and step S350 may refer to the contents of the foregoing embodiments, and are not described herein again.
According to the control method for audio output, the current ambient temperature and the current resonant frequency of the audio output device are obtained, and then the maximum driving voltage is determined according to the current ambient temperature and the current resonant frequency, so that the accuracy of the maximum driving voltage is guaranteed. By controlling the driving voltage of the audio output device based on the determined maximum driving voltage, the amplitude of the audio output device can be ensured not to exceed the maximum amplitude, and the audio output device does not need to set the maximum amplitude which can be reached to be about 80% of the maximum amplitude of the audio output device at any ambient temperature, so that the playing performance of the audio output device can be fully exerted.
Referring to fig. 5, fig. 5 is a flow chart illustrating a method for controlling audio output according to still another embodiment of the present application. The method for controlling audio output is applied to the electronic device, and will be described in detail with reference to the flow shown in fig. 5, where the method for controlling audio output may specifically include the following steps:
step S410: and acquiring the environmental temperature of the current environment of the audio output device as a target temperature.
Step S420: and acquiring the current resonant frequency of the audio output device as a target frequency.
In the embodiment of the present application, step S410 and step S420 may refer to the contents of the foregoing embodiments, and are not described herein again.
Step S430: and acquiring a difference value between the reference frequency and the target frequency as a target difference value.
In this embodiment, the reference frequency may be a resonant frequency at which a ratio of the amplitude of the audio acquisition device to the voltage is maximum. The electronic device may compare the reference frequency with the target frequency to determine whether the first voltage corresponding to the currently-used maximum amplitude (i.e., the currently-used maximum driving voltage) needs to be adjusted, that is, the determined maximum driving voltage at the reference frequency is adjusted to obtain the maximum driving voltage of the audio output device in the currently-located environment. Specifically, the electronic device may obtain a difference between the reference frequency and the target frequency, so as to determine whether to adjust the first voltage according to the difference.
Step S440: if the difference is larger than a target threshold value and the target frequency is reduced relative to the resonant frequency determined at the previous time, based on the change of the transfer function, reducing the first voltage corresponding to the currently adopted maximum amplitude to obtain a second voltage, and taking the second voltage as the maximum driving voltage.
In the embodiment of the application, after obtaining the difference value between the reference frequency and the target frequency, the electronic device may compare the difference value with a target threshold; determining whether the difference between the reference frequency and the target frequency is greater than a target threshold value according to the comparison result; if the difference is greater than the target threshold, it indicates that the current resonant frequency is much smaller than the reference frequency, and when the resonant frequency is smaller than the reference frequency, the transfer function between the amplitude and the voltage of the audio output device is also changed, and the change at this time is: since the ratio of the amplitude to the driving voltage increases, that is, the amplitude at the same driving voltage increases, based on this change, if the first voltage corresponding to the currently used maximum amplitude is still used as the maximum driving voltage, the amplitude exceeds the maximum amplitude; if the difference is not greater than the target threshold, it indicates that the current resonant frequency is not decreased from the reference frequency, or the decrease amount is small, and in this case, if the target frequency is decreased from the previous resonant frequency, the transfer function is changed to: the ratio of amplitude to voltage is also reduced, which may be based on this change, without causing the amplitude to exceed the maximum amplitude if the first voltage is still used as the maximum driving voltage. Therefore, when the difference is larger than the target threshold, the currently adopted first voltage is reduced to obtain a second voltage, and the second voltage is used as the maximum driving voltage. The electronic device may execute the audio output control method provided in the embodiment of the present application at a certain time interval, so that the resonant frequency in the current environment may be continuously obtained, and the resonant frequency obtained in the last execution of the current execution may be used as the resonant frequency determined in the previous execution. It is understood that, referring again to fig. 2, at the same temperature, the ratio of the amplitude to the driving voltage varies with the resonant frequency, and the amplitude of the transfer function is positively correlated with the driving voltage, so that the variation of the transfer function can be determined based thereon.
In some embodiments, the electronic device may determine a voltage reduction value based on a change in the transfer function and an amount of reduction in the target frequency from a previously determined resonant frequency when reducing the first voltage; then, the first voltage is lowered by the voltage lowering value to obtain a second voltage, and the second voltage is set as the maximum defect voltage. It will be appreciated that typically after the resonant frequency has dropped to a certain value, the change in transfer function is: the change of the ratio between the amplitude and the voltage corresponding to the audio output device is generally linearly increased, and based on the change, the change of the ratio can be determined according to the difference between the frequencies; then, the reduction amount of the driving voltage at the maximum amplitude is determined according to the variation of the ratio, for example, the reduction amount of the driving voltage at the maximum amplitude can be obtained by dividing the maximum amplitude by the variation of the ratio, and the reduction amount of the driving voltage at the maximum amplitude is used as the voltage reduction value.
Step S450: and if the target difference is not larger than a target threshold value and the target frequency is reduced relative to the resonant frequency determined at the previous time, taking the first voltage as the maximum driving voltage.
In the embodiment of the present application, when the difference is not greater than the target threshold, it indicates that the current resonant frequency is not decreased from the reference frequency, or the decrease amount is small, in this case, if the target frequency is decreased from the previous resonant frequency, the ratio of the amplitude to the voltage is also decreased, and at this time, if the first voltage is still used as the maximum driving voltage, the amplitude is not caused to exceed the maximum amplitude. Therefore, when the difference value is larger than the target threshold value, the currently adopted first voltage is reduced to obtain a second voltage, and the second voltage is used as the maximum driving voltage.
Further, when the current resonant frequency (target frequency) is less than the reference frequency and the difference is less than or equal to the target threshold, if the target frequency is decreased from the resonant frequency determined last time, because the current resonant frequency is decreased less from the reference frequency, the first voltage is used as the driving voltage corresponding to the maximum amplitude, and the maximum amplitude is not exceeded, but because the change of the transfer function at this time is: the ratio of the amplitude to the voltage at the resonance frequency decreases, and therefore, there may be a case where the first voltage is used as the maximum driving voltage and the amplitude cannot reach the maximum amplitude. In this case, the first voltage may be increased to obtain a new voltage as the maximum driving voltage, so that the maximum amplitude can be obtained under the environment where the audio output device is located when outputting the audio. Similarly, the increase amount of the voltage may be determined based on the absolute value of the difference, and the first voltage may be increased based on the increase amount to obtain a new voltage as the maximum driving voltage.
In addition, in the case where the current resonance frequency (target frequency) is less than the reference frequency and the difference is less than or equal to the target threshold, if the target frequency is increased from the last determined resonance frequency, the reference frequency may be gradually approximated, that is, the change of the transfer function is: the ratio of the amplitude to the voltage is gradually increased, so that if the first voltage is still used as the maximum driving voltage, the amplitude may exceed the maximum amplitude, in this case, the first voltage may be decreased to obtain the maximum driving voltage, wherein the manner of decreasing the first voltage may refer to the manner of decreasing the first voltage. When the target frequency is greater than the reference frequency, the change in the transfer function is: the ratio of the amplitude to the voltage generally decreases with an increase in the resonant frequency, in which case the ratio decreases if the target frequency increases relative to the previously determined resonant frequency, so that the first voltage can be boosted to obtain the maximum driving voltage; if the target frequency is reduced from the previously determined resonant frequency, the change in the transfer function is: the ratio of the amplitude to the drive voltage is increased so that the first voltage can be decreased to obtain the maximum drive voltage, wherein the increased or decreased amplitude in this case can be obtained according to the variation of the ratio with the resonance frequency.
Step S460: and controlling the audio output device to output audio with a driving voltage less than or equal to the maximum driving voltage.
The principle of the control method of audio output provided by the present embodiment is demonstrated below with reference to experimental data. Referring to fig. 2 again, fig. 2 shows the variation of the ratio of the amplitude to the driving voltage with the resonant frequency under different temperature conditions, wherein the ordinate is the ratio of the amplitude to the driving voltage (mm/v ), the abscissa is the resonant frequency (Hz, Hz), and the three curves in fig. 2 are the variation curves corresponding to 25 ℃, 60 ℃ and 90 ℃. In the curve shown in fig. 2, the abscissa corresponding to the position point with the largest abscissa may be used as the above reference frequency, and after the resonant frequency is decreased from the reference frequency to a certain extent, the above ratios all increase with the decrease of the resonant frequency, so that the above target threshold may be determined based on this, and when the resonant frequency is decreased at the position point closer to the reference frequency, the ratio is also decreased accordingly; similarly, when the resonant frequency is greater than the reference frequency, the ratio decreases as the resonant frequency increases. The inventor just obtains experimental data through countless experiments, and researches the audio output control method provided by the embodiment of the application.
According to the control method for audio output, the current ambient temperature and the current resonant frequency of the audio output device are obtained, and then the maximum driving voltage is determined according to the current ambient temperature and the current resonant frequency, so that the accuracy of the maximum driving voltage is guaranteed. By controlling the driving voltage of the audio output device based on the determined maximum driving voltage, the amplitude of the audio output device can be ensured not to exceed the maximum amplitude, and the audio output device does not need to set the maximum amplitude which can be reached to be about 80% of the maximum amplitude of the audio output device at any ambient temperature, so that the playing performance of the audio output device can be fully exerted.
Referring to fig. 6, a block diagram of a control apparatus 400 for audio output according to an embodiment of the present disclosure is shown. The control device 400 for audio output is an electronic device including the audio output device, and the control device 400 for audio output includes: a temperature acquisition module 410, a function acquisition module 420, a voltage determination module 430, and a voltage control module 440. The temperature obtaining module 410 is configured to obtain an ambient temperature of an environment where the audio output device is currently located as a target temperature; the function obtaining module 420 is configured to obtain a transfer function corresponding to the target temperature as a target transfer function, where the transfer function is used to represent a corresponding relationship between the amplitude and the driving voltage of the audio output device; the voltage determining module 430 is configured to obtain, based on the target transfer function, a driving voltage corresponding to a maximum amplitude of the audio output device at the target temperature as a maximum driving voltage; the voltage control module 440 is configured to control a driving voltage of the audio output device for audio output to be less than or equal to the maximum driving voltage.
In some embodiments, the voltage control module 440 may be configured to: and if the driving voltage for audio output by the audio output device is greater than the maximum driving voltage, reducing the driving voltage for audio output by the audio output device, wherein the reduced driving voltage is less than or equal to the maximum driving voltage.
In one possible implementation, the voltage control module 440 may be configured to: determining a gain value to be attenuated as a target gain value based on the current driving voltage of the audio output device and the maximum driving voltage.
In some embodiments, the temperature acquisition module 410 may be configured to: and acquiring the ambient temperature of the current environment of the audio output device as a target temperature every preset time. The function acquisition module 420 may be configured to: and if the target temperature changes, acquiring a transfer function corresponding to the target temperature as a target transfer function.
In some embodiments, the control device 400 for audio output may further include: and a frequency acquisition module. The frequency acquisition module is used for acquiring the current resonant frequency of the audio output device as a target frequency before the transfer function corresponding to the target temperature is acquired as a target transfer function; the function acquisition module 420 may be configured to: and acquiring a transfer function corresponding to the target frequency at the target temperature as a target transfer function.
In one possible implementation, the function obtaining module 420 may be configured to: acquiring a corresponding relation corresponding to the environment temperature according to the corresponding relation between the resonance frequency and the transfer function corresponding to different environment temperatures; and acquiring a transfer function corresponding to the target frequency as a target transfer function based on the corresponding relation corresponding to the environment temperature.
In some embodiments, the control device 400 for audio output may further include: and a frequency acquisition module. The frequency obtaining module is used for obtaining the current resonant frequency of the audio output device as a target frequency before obtaining the transfer function corresponding to the target temperature as the target transfer function. The function acquisition module 420 may be configured to: obtaining a transfer function corresponding to the reference frequency at the target temperature as a target transfer function; the voltage determination module 430 may be configured to: acquiring a difference value between the reference frequency and the target frequency as a target difference value; if the difference is larger than a target threshold value and the target frequency is reduced relative to the resonant frequency determined at the previous time, based on the change of the transfer function, reducing the first voltage corresponding to the currently adopted maximum amplitude to obtain a second voltage, and taking the second voltage as the maximum driving voltage.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses and modules may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, the coupling between the modules may be electrical, mechanical or other type of coupling.
In addition, functional modules in the embodiments of the present application may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
To sum up, according to the scheme provided by the application, the ambient temperature of the current environment of the audio output device is obtained as the target temperature, the transfer function corresponding to the target temperature is obtained as the target transfer function, the transfer function is used for representing the corresponding relation between the amplitude of the audio output device and the driving voltage, the driving voltage corresponding to the maximum amplitude of the audio output device at the target temperature is obtained based on the target transfer function and is used as the maximum driving voltage, and the driving voltage for controlling the audio output device to output the audio is smaller than or equal to the maximum driving voltage. Therefore, the driving voltage corresponding to the maximum amplitude can be determined based on the audio output device at different environmental temperatures, the driving voltage of the audio output device is controlled, the stability of the audio output device at different environmental temperatures is guaranteed, and the audio playing effect is improved.
Referring to fig. 7, a block diagram of an electronic device according to an embodiment of the present application is shown. The electronic device 100 may be an electronic device capable of running an application, such as a smart phone, a tablet computer, a smart watch, smart glasses, and a notebook computer. The electronic device 100 in the present application may include one or more of the following components: a processor 110, a memory 120, an audio output device 130, and one or more applications, wherein the one or more applications may be stored in the memory 120 and configured to be executed by the one or more processors 110, the one or more programs configured to perform the methods as described in the aforementioned method embodiments.
The Memory 120 may include a Random Access Memory (RAM) or a Read-Only Memory (Read-Only Memory). The memory 120 may be used to store instructions, programs, code sets, or instruction sets. The memory 120 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for implementing at least one function (such as a touch function, a sound playing function, an image playing function, etc.), instructions for implementing various method embodiments described below, and the like. The data storage area may also store data created by the electronic device 100 during use (e.g., phone book, audio-video data, chat log data), and the like.
The audio output device 130 is used for outputting audio signals, and the audio output device 130 may be a speaker, etc., and is not limited herein.
Referring to fig. 8, a block diagram of a computer-readable storage medium according to an embodiment of the present application is shown. The computer-readable medium 800 has stored therein a program code that can be called by a processor to execute the method described in the above-described method embodiments.
The computer-readable storage medium 800 may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read only memory), an EPROM, a hard disk, or a ROM. Alternatively, the computer-readable storage medium 800 includes a non-volatile computer-readable storage medium. The computer readable storage medium 800 has storage space for program code 810 to perform any of the method steps of the method described above. The program code can be read from or written to one or more computer program products. The program code 810 may be compressed, for example, in a suitable form.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A method for controlling audio output, applied to an electronic device including an audio output apparatus, the method comprising:
acquiring the environmental temperature of the current environment of the audio output device as a target temperature;
obtaining a transfer function corresponding to the target temperature as a target transfer function, wherein the transfer function is used for representing the corresponding relation between the amplitude and the driving voltage of the audio output device;
based on the target transfer function, acquiring a driving voltage corresponding to the maximum amplitude of the audio output device at the target temperature as a maximum driving voltage;
and controlling the audio output device to output audio with a driving voltage less than or equal to the maximum driving voltage.
2. The method of claim 1, wherein the controlling the audio output device to output audio at a drive voltage less than or equal to the maximum drive voltage comprises:
and if the driving voltage for audio output by the audio output device is greater than the maximum driving voltage, reducing the driving voltage for audio output by the audio output device, wherein the reduced driving voltage is less than or equal to the maximum driving voltage.
3. The method of claim 2, wherein the reducing the driving voltage for audio output by the audio output device comprises:
determining a gain value to be attenuated as a target gain value based on the current driving voltage of the audio output device and the maximum driving voltage;
and reducing the gain value in the audio processing by the target gain value so as to reduce the driving voltage of the audio output device for audio output to be the maximum driving voltage.
4. The method according to claim 1, wherein the obtaining the ambient temperature of the environment in which the audio output device is currently located as the target temperature comprises:
acquiring the environmental temperature of the current environment of the audio output device as a target temperature every preset time;
the obtaining of the transfer function corresponding to the target temperature as the target transfer function includes:
and if the target temperature changes, acquiring a transfer function corresponding to the target temperature as a target transfer function.
5. The method according to any one of claims 1-4, wherein before the obtaining the transfer function corresponding to the target temperature as the target transfer function, the method further comprises:
acquiring the current resonant frequency of the audio output device as a target frequency;
the obtaining of the transfer function corresponding to the target temperature as the target transfer function includes:
and acquiring a transfer function corresponding to the target frequency at the target temperature as a target transfer function.
6. The method according to claim 5, wherein the obtaining a transfer function corresponding to the target frequency at the ambient temperature as a target transfer function comprises:
acquiring a corresponding relation corresponding to the environment temperature according to the corresponding relation between the resonance frequency and the transfer function corresponding to different environment temperatures;
and acquiring a transfer function corresponding to the target frequency as a target transfer function based on the corresponding relation corresponding to the environment temperature.
7. The method according to any one of claims 1-4, wherein before the obtaining the transfer function corresponding to the target temperature as the target transfer function, the method further comprises:
acquiring the current resonant frequency of the audio output device as a target frequency;
the obtaining a transfer function corresponding to the target temperature as a target transfer function, and obtaining a driving voltage corresponding to a maximum amplitude of the audio output device at the target temperature as a maximum driving voltage based on the target transfer function, includes:
acquiring a difference value between the reference frequency and the target frequency as a target difference value;
if the difference is larger than a target threshold value and the target frequency is reduced relative to the resonant frequency determined at the previous time, based on the change of the transfer function, reducing the first voltage corresponding to the currently adopted maximum amplitude to obtain a second voltage, and taking the second voltage as the maximum driving voltage.
8. An apparatus for controlling audio output, applied to an electronic device including an audio output apparatus, the apparatus comprising: a temperature acquisition module, a function acquisition module, a voltage determination module, and a voltage control module, wherein,
the temperature acquisition module is used for acquiring the ambient temperature of the current environment of the audio output device as a target temperature;
the function obtaining module is used for obtaining a transfer function corresponding to the target temperature as a target transfer function, and the transfer function is used for representing the corresponding relation between the amplitude and the driving voltage of the audio output device;
the voltage determining module is used for acquiring a driving voltage corresponding to the maximum amplitude of the audio output device at the target temperature based on the target transfer function, and the driving voltage is used as the maximum driving voltage;
the voltage control module is used for controlling the audio output device to output audio, and the driving voltage of the audio output device is less than or equal to the maximum driving voltage.
9. An electronic device, comprising:
an audio output device;
one or more processors;
a memory;
one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the one or more processors, the one or more programs configured to perform the method of any of claims 1-7.
10. A computer-readable storage medium, having stored thereon program code that can be invoked by a processor to perform the method according to any one of claims 1 to 7.
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