CN116248933A - Intelligent equipment and space sound field calibration method - Google Patents

Abstract

Some embodiments of the present application show an intelligent device and a method for calibrating a spatial sound field, the method comprising: responding to an instruction input by a user for starting the calibration of the spatial sound field, and controlling the loudspeaker to play a preset standard sound with a first sound intensity; receiving a first audio file; calculating a first energy value of a preset frequency point based on the first audio file, and determining a first quantity of target-size audio data in the first audio file; determining a first sound gain of the preset frequency point according to the first energy value, the first quantity, a preset target gain, a bandwidth and a manual adjustment offset; and calibrating a frequency response curve corresponding to the first sound intensity based on the first sound gain. According to the method and the device, through collecting the sound attenuated by the room, according to the room acoustic correction algorithm, the sound of the intelligent device is adjusted, so that a user can enjoy better sound effects in any room with different decorations, and user experience is improved.

Description

Intelligent equipment and space sound field calibration method

Technical Field

The application relates to the technical field of intelligent equipment, in particular to intelligent equipment and a space sound field calibration method.

Background

At present, televisions are widely applied to families, work and life, the sound and sound effect of the televisions are fixed after the user adjusts, namely, the sound and sound effect processing of the televisions can only be changed by manually adjusting the volume of a remote controller and selecting sound effects and sound modes from a setting menu. But different users' home decorations, such as different indoor structures, different decoration materials and different furniture placement positions, have different degrees of attenuation on sound. When watching television, there is a certain degree of tone quality loss or uncomfortable volume, and the user experience is reduced.

Disclosure of Invention

According to the intelligent device and the space sound field calibration method, through collecting the sound attenuated by the room, the sound of the intelligent device is adjusted according to the room acoustic correction algorithm, so that a user can enjoy better sound effects in any room with different decorations, and user experience is improved.

In a first aspect, some embodiments of the present application provide a display device, including:

a speaker;

a sound collector;

a controller configured to:

responding to an instruction input by a user for starting the calibration of the spatial sound field, and controlling the loudspeaker to play a preset standard sound with a first sound intensity;

Receiving a first audio file, wherein the first audio file is generated by the sound collector collecting the preset standard sound;

calculating a first energy value of a preset frequency point based on the first audio file, and determining a first quantity of target-size audio data in the first audio file;

determining a first sound gain of the preset frequency point according to the first energy value, the first quantity, a preset target gain, a bandwidth and a manual adjustment offset;

and calibrating a frequency response curve corresponding to the first sound intensity based on the first sound gain.

In some embodiments, the sound collector includes a control device, and the first audio file is a file generated by collecting the preset standard sound at the first position by the user through the control device.

In some embodiments, the controller is configured to:

receiving a second audio file, wherein the second audio file is generated by a user collecting the preset standard sound at a second position through a control device;

calculating a second energy value of the preset frequency point based on the second audio file, and determining a second quantity of target-size audio data in the second audio file;

And determining a second sound gain of the preset frequency point according to the second energy value, the second quantity, the preset target gain, the bandwidth and the manual adjustment offset.

In some embodiments, the controller performs adjusting the frequency response curve corresponding to the first sound intensity based on the first sound gain, resulting in a calibrated frequency response curve, and is further configured to:

calculating an average sound gain of the first sound gain and the second sound gain;

and calibrating a frequency response curve corresponding to the first sound intensity based on the average sound gain.

In some embodiments, the controller performing calibration of the frequency response curve corresponding to the first sound intensity based on the first sound gain is further configured to:

determining a first weight corresponding to the first position and a second weight corresponding to the second position, wherein the first position is different from the second position;

calculating a weighted average sound gain of the first sound gain and the second sound gain according to the first weight and the second weight;

and calibrating a frequency response curve corresponding to the first sound intensity based on the weighted average sound gain.

In some embodiments, the controller performing calibration of the frequency response curve corresponding to the first sound intensity based on the first sound gain is further configured to:

and if the first sound gain of the preset frequency point is smaller than or equal to the adjustable maximum gain, calibrating a frequency response curve corresponding to the first sound intensity based on the first sound gain.

In some embodiments, the controller performs determining a first sound gain for the preset frequency point based on the first energy value, the first number, a preset target gain, a bandwidth, and a manual adjustment offset, and is further configured to:

converting the first energy value of the preset frequency point into a first gain of the preset frequency point according to the first quantity;

calculating a measurement gain sum according to the first gain of the preset frequency point and the bandwidth of the preset frequency point;

calculating a target gain sum according to the preset target gain of the preset frequency point and the bandwidth of the preset frequency point;

calculating the ratio of the sum of the measured gains to the sum of the target gains;

determining a target adjustment gain of the preset frequency point based on the ratio and the preset target gain of the preset frequency point;

And determining the first sound gain of the preset frequency point based on the target adjustment gain, the first gain and the manual adjustment offset.

In some embodiments, the controller performing calibration of the frequency response curve corresponding to the first sound intensity based on the first sound gain is further configured to:

and calibrating a frequency response curve corresponding to the first sound intensity based on the first sound gain if the difference value between the first gain of the preset frequency point and the preset target gain of the preset frequency point is larger than or equal to the preset gain difference value.

In some embodiments, the controller is configured to:

if the difference value between the first gain of the preset frequency point and the preset target gain of the preset frequency point is smaller than the preset gain difference value, controlling the loudspeaker to play prompt audio, wherein the content of the prompt audio comprises that the spatial sound field calibration cannot be carried out due to small volume;

and controlling the loudspeaker to play the preset standard sound with a second sound intensity, wherein the second sound intensity is larger than the first sound intensity.

In a second aspect, some embodiments of the present application provide a spatial sound field calibration method, including:

responding to an instruction input by a user for starting the calibration of the spatial sound field, and controlling the loudspeaker to play a preset standard sound with a first sound intensity;

Receiving a first audio file, wherein the first audio file is generated by the sound collector collecting the preset standard sound;

calculating a first energy value of a preset frequency point based on the first audio file, and determining a first quantity of target-size audio data in the first audio file;

determining a first sound gain of the preset frequency point according to the first energy value, the first quantity, a preset target gain, a bandwidth and a manual adjustment offset;

and calibrating a frequency response curve corresponding to the first sound intensity based on the first sound gain.

Some embodiments of the present application provide an intelligent device and a space sound field calibration method, after receiving a command for starting space sound field calibration input by a user, the intelligent device collects a preset standard sound corresponding to a first sound intensity to be played, and generates an audio file. After receiving the audio file, the intelligent equipment processes the audio file by using a room acoustic correction algorithm, specifically, calculates a first energy value of a preset frequency point based on the audio file and determines the number of audio data with a target size in the audio file; and determining a first sound gain of a preset frequency point according to the first energy value, the number of the audio data of the target size, the preset target gain, the bandwidth and the manual adjustment offset. The frequency response curve of the smart device is calibrated based on the first sound gain. According to the method and the device, through collecting the sound attenuated by the room, the sound of the intelligent device is adjusted according to the room acoustic correction algorithm, so that a user can enjoy better sound effects in any room with different decorations, and user experience is improved.

Drawings

FIG. 1 illustrates an operational scenario between a display device and a control apparatus according to some embodiments;

fig. 2 shows a hardware configuration block diagram of the control device 100 according to some embodiments;

fig. 3 illustrates a hardware configuration block diagram of a display device 200 according to some embodiments;

FIG. 4 illustrates a software configuration diagram in a display device 200 according to some embodiments;

FIG. 5 illustrates a flow chart of a method for a controller to perform spatial sound field calibration, provided in accordance with some embodiments;

FIG. 6 illustrates a schematic diagram of a spatial sound field interface provided in accordance with some embodiments;

FIG. 7 illustrates a schematic diagram of a prompt interface for spatial sound field calibration provided in accordance with some embodiments;

FIG. 8 illustrates a schematic diagram of an audio playback interface provided in accordance with some embodiments;

FIG. 9 illustrates a flow chart of a method for a controller to perform calculating a first energy value for a preset frequency point based on a first audio file, in accordance with some embodiments;

FIG. 10 illustrates a schematic diagram of a frequency response curve provided in accordance with some embodiments;

FIG. 11 illustrates a schematic diagram of a location hint page provided in accordance with some embodiments;

FIG. 12 illustrates a schematic diagram of another location hint page provided in accordance with some embodiments;

FIG. 13 illustrates a schematic diagram of yet another location hint page provided in accordance with some embodiments;

FIG. 14 illustrates a schematic diagram of a prompt interface provided in accordance with some embodiments;

FIG. 15 illustrates a schematic diagram of another prompt interface provided in accordance with some embodiments.

Detailed Description

For purposes of clarity and implementation of the present application, the following description will make clear and complete descriptions of exemplary implementations of the present application with reference to the accompanying drawings in which exemplary implementations of the present application are illustrated, it being apparent that the exemplary implementations described are only some, but not all, of the examples of the present application.

It should be noted that the brief description of the terms in the present application is only for convenience in understanding the embodiments described below, and is not intended to limit the embodiments of the present application. Unless otherwise indicated, these terms should be construed in their ordinary and customary meaning.

The terms first and second and the like in the description and in the claims and in the above-described figures are used for distinguishing between similar or similar objects or entities and not necessarily for limiting a particular order or sequence, unless otherwise indicated. It is to be understood that the terms so used are interchangeable under appropriate circumstances.

The terms "comprises," "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements is not necessarily limited to all elements explicitly listed, but may include other elements not expressly listed or inherent to such product or apparatus.

The intelligent device provided by the embodiment of the application can have various implementation forms, for example, a display device, an audio output device and the like. The audio output device comprises an intelligent sound box and other devices for playing audio.

The display device provided in the embodiment of the application may have various implementation forms, for example, may be a television, an intelligent television, a laser projection device, a display (monitor), an electronic whiteboard (electronic bulletin board), an electronic desktop (electronic table), and the like. Fig. 1 and 2 are specific embodiments of a display device of the present application.

Fig. 1 is a schematic diagram of an operation scenario between a display device and a control apparatus according to an embodiment. As shown in fig. 1, a user may operate the display device 200 through the smart device 300 or the control apparatus 100.

In some embodiments, the control apparatus 100 may be a remote controller, and the communication between the remote controller and the display device includes infrared protocol communication or bluetooth protocol communication, and other short-range communication modes, and the display device 200 is controlled by a wireless or wired mode. The user may control the display device 200 by inputting user instructions through keys on a remote control, voice input, control panel input, etc.

In some embodiments, a smart device 300 (e.g., mobile terminal, tablet, computer, notebook, etc.) may also be used to control the display device 200. For example, the display device 200 is controlled using an application running on a smart device.

In some embodiments, the display device may receive instructions not using the smart device or control device described above, but rather receive control of the user by touch or gesture, or the like.

In some embodiments, the display device 200 may also perform control in a manner other than the control apparatus 100 and the smart device 300, for example, the voice command control of the user may be directly received through a module configured inside the display device 200 device for acquiring voice commands, or the voice command control of the user may be received through a voice control device configured outside the display device 200 device.

In some embodiments, the display device 200 is also in data communication with a server 400. The display device 200 may be permitted to make communication connections via a Local Area Network (LAN), a Wireless Local Area Network (WLAN), and other networks. The server 400 may provide various contents and interactions to the display device 200. The server 400 may be a cluster, or may be multiple clusters, and may include one or more types of servers.

Fig. 2 exemplarily shows a block diagram of a configuration of the control apparatus 100 in accordance with an exemplary embodiment. As shown in fig. 2, the control device 100 includes a controller 110, a communication interface 130, a user input/output interface 140, a memory, and a power supply. The control apparatus 100 may receive an input operation instruction of a user and convert the operation instruction into an instruction recognizable and responsive to the display device 200, and function as an interaction between the user and the display device 200.

As shown in fig. 3, the display apparatus 200 includes at least one of a modem 210, a communicator 220, a detector 230, an external device interface 240, a controller 250, a display 260, an audio output interface 270, a memory, a power supply, and a user interface.

In some embodiments the controller includes a processor, a video processor, an audio processor, a graphics processor, RAM, ROM, a first interface for input/output to an nth interface.

The display 260 includes a display screen component for presenting a picture, and a driving component for driving an image display, a component for receiving an image signal from the controller output, displaying video content, image content, and a menu manipulation interface, and a user manipulation UI interface.

The display 260 may be a liquid crystal display, an OLED display, a projection device, or a projection screen.

The display 260 further includes a touch screen, and the touch screen is used for receiving an action input control instruction such as sliding or clicking of a finger of a user on the touch screen.

The communicator 220 is a component for communicating with external devices or servers according to various communication protocol types. For example: the communicator may include at least one of a Wifi module, a bluetooth module, a wired ethernet module, or other network communication protocol chip or a near field communication protocol chip, and an infrared receiver. The display device 200 may establish transmission and reception of control signals and data signals with the external control device 100 or the server 400 through the communicator 220.

A user interface, which may be used to receive control signals from the control device 100 (e.g., an infrared remote control, etc.).

The detector 230 is used to collect signals of the external environment or interaction with the outside. For example, detector 230 includes a light receiver, a sensor for capturing the intensity of ambient light; alternatively, the detector 230 includes an image collector such as a camera, which may be used to collect external environmental scenes, user attributes, or user interaction gestures, or alternatively, the detector 230 includes a sound collector such as a microphone, or the like, which is used to receive external sounds.

The external device interface 240 may include, but is not limited to, the following: high Definition Multimedia Interface (HDMI), analog or data high definition component input interface (component), composite video input interface (CVBS), USB input interface (USB), RGB port, or the like. The input/output interface may be a composite input/output interface formed by a plurality of interfaces.

The modem 210 receives broadcast television signals through a wired or wireless reception manner, and demodulates audio and video signals, such as EPG data signals, from a plurality of wireless or wired broadcast television signals.

In some embodiments, the controller 250 and the modem 210 may be located in separate devices, i.e., the modem 210 may also be located in an external device to the main device in which the controller 250 is located, such as an external set-top box or the like.

The controller 250 controls the operation of the display device and responds to the user's operations through various software control programs stored on the memory. The controller 250 controls the overall operation of the display apparatus 200. For example: in response to receiving a user command to select a UI object to be displayed on the display 260, the controller 250 may perform an operation related to the object selected by the user command.

In some embodiments the controller includes at least one of a central processing unit (Central Processing Unit, CPU), video processor, audio processor, graphics processor (Graphics Processing Unit, GPU), RAM Random Access Memory, RAM), ROM (Read-Only Memory, ROM), first to nth interfaces for input/output, a communication Bus (Bus), and the like.

The user may input a user command through a Graphical User Interface (GUI) displayed on the display 260, and the user input interface receives the user input command through the Graphical User Interface (GUI). Alternatively, the user may input the user command by inputting a specific sound or gesture, and the user input interface recognizes the sound or gesture through the sensor to receive the user input command.

A "user interface" is a media interface for interaction and exchange of information between an application or operating system and a user, which enables conversion between an internal form of information and a user-acceptable form. A commonly used presentation form of the user interface is a graphical user interface (Graphic User Interface, GUI), which refers to a user interface related to computer operations that is displayed in a graphical manner. It may be an interface element such as an icon, a window, a control, etc. displayed in a display screen of the electronic device, where the control may include a visual interface element such as an icon, a button, a menu, a tab, a text box, a dialog box, a status bar, a navigation bar, a Widget, etc.

Referring to FIG. 4, in some embodiments, the system is divided into four layers, from top to bottom, an application layer (referred to as an "application layer"), an application framework layer (Application Framework layer) (referred to as a "framework layer"), a An Zhuoyun row (Android run) and a system library layer (referred to as a "system runtime layer"), and a kernel layer, respectively.

In some embodiments, at least one application program is running in the application program layer, and these application programs may be a Window (Window) program of an operating system, a system setting program, a clock program, or the like; or may be an application developed by a third party developer. In particular implementations, the application packages in the application layer are not limited to the above examples.

The framework layer provides an application programming interface (application programming interface, API) and programming framework for the application. The application framework layer includes a number of predefined functions. The application framework layer corresponds to a processing center that decides to let the applications in the application layer act. Through the API interface, the application program can access the resources in the system and acquire the services of the system in the execution.

As shown in fig. 4, the application framework layer in the embodiment of the present application includes a manager (manager), a Content Provider (Content Provider), and the like, where the manager includes at least one of the following modules: an Activity Manager (Activity Manager) is used to interact with all activities that are running in the system; a Location Manager (Location Manager) is used to provide system services or applications with access to system Location services; a Package Manager (Package Manager) for retrieving various information about an application Package currently installed on the device; a notification manager (Notification Manager) for controlling the display and clearing of notification messages; a Window Manager (Window Manager) is used to manage bracketing icons, windows, toolbars, wallpaper, and desktop components on the user interface.

In some embodiments, the activity manager is used to manage the lifecycle of the individual applications as well as the usual navigation rollback functions, such as controlling the exit, opening, fallback, etc. of the applications. The window manager is used for managing all window programs, such as obtaining the size of the display screen, judging whether a status bar exists or not, locking the screen, intercepting the screen, controlling the change of the display window (for example, reducing the display window to display, dithering display, distorting display, etc.), etc.

In some embodiments, the system runtime layer provides support for the upper layer, the framework layer, and when the framework layer is in use, the android operating system runs the C/C++ libraries contained in the system runtime layer to implement the functions to be implemented by the framework layer.

In some embodiments, the kernel layer is a layer between hardware and software. As shown in fig. 4, the kernel layer contains at least one of the following drivers: audio drive, display drive, bluetooth drive, camera drive, WIFI drive, USB drive, HDMI drive, sensor drive (e.g., fingerprint sensor, temperature sensor, pressure sensor, etc.), and power supply drive, etc.

At present, televisions are widely applied to families, work and life, the sound and sound effect of the televisions are fixed after the user adjusts, namely, the sound and sound effect processing of the televisions can only be changed by manually adjusting the volume of a remote controller and selecting sound effects and sound modes from a setting menu. But different users' home decorations, such as different indoor structures, different decoration materials and different furniture placement positions, have different degrees of attenuation on sound. When watching television, there is a certain degree of tone quality loss or uncomfortable volume, and the user experience is reduced.

In order to solve the above technical problems, the present embodiment provides an intelligent device, and the present embodiment further improves some functions of the intelligent device, as shown in fig. 5, the controller 250 performs the following steps:

step S501: receiving an instruction for starting the spatial sound field calibration input by a user;

in some embodiments, a user enters a setup interface through a menu key of a control device, and selects a space sound field control in the setup interface to enter the space sound field interface, the space sound field interface including a space sound field calibration control, the user selecting the space sound field calibration control to input an instruction to initiate space sound field calibration. Illustratively, as shown in FIG. 6, the spatial sound field interface includes a spatial sound field on-off control 61 and a spatial sound field calibration control 62, with user selectable spatial sound field calibration control 62 inputting an instruction to initiate spatial sound field calibration.

In some embodiments, the user may press a voice key of the control device and speak "open space sound field calibration" to input instructions to initiate the space sound field calibration.

In some embodiments, the user may initiate a voice function by speaking a far field wake-up word and speak "open space sound field calibration" when the display device or audio output device begins to sound to input instructions to initiate space sound field calibration.

Step S502: responding to an instruction input by a user for starting the calibration of the space sound field, and controlling the display to display a prompt interface for the calibration of the space sound field, wherein the prompt page comprises prompt information and a calibration starting control;

in some embodiments, in response to a user input instruction to initiate spatial sound field calibration, an application of spatial sound field calibration is opened while a prompt page of the spatial sound field calibration application is displayed. The prompt information comprises an operation mode and notes of the space sound field calibration. The operation mode of the spatial sound field calibration includes capturing the played sound at a designated location using the control apparatus 100 or the smart device 300. Note that the spatial sound field calibration needs to be performed in a quiet environment, and in a case where the control apparatus 100 or the smart device 300 is connected to the display device 200. For example: the bluetooth remote control needs to perform spatial sound field calibration in the case of already paired with the display device. Both the handset and the display device need to be connected to a network and an application program for controlling the display device 200 is installed on the handset.

Illustratively, in FIG. 6, a user selects the spatial sound field calibration control 61 and, in response to a user entered instruction, a user interface such as that shown in FIG. 7 is displayed. Included in fig. 7 are prompt 71, start calibration control 72, cancel calibration control 73, bluetooth control 74, and focus 75. When the bluetooth remote controller and the display device are successfully paired, the successfully paired information can be displayed on the bluetooth control 74, if the unpaired information is displayed on the bluetooth control 74 when the bluetooth remote controller and the display device are unpaired, the user can move the focus 75 to the position of the bluetooth control 74, and the bluetooth control 74 is selected so that the display device searches the current bluetooth device and realizes pairing with the bluetooth remote controller. After the pairing is completed, an instruction that the user selects to start the calibration control 72 is received, and a spatial sound field calibration process is performed.

In some embodiments, the form of identification of the focal point is generally varied. For example, the position of the focus object may be achieved or identified by zooming in on the item, and also by setting the background color of the item, or may be identified by changing the border line, size, color, transparency, outline, and/or font of the text or image of the focus item.

Step S503: receiving an instruction which is input by a user and is selected to start a calibration control;

in some embodiments, the user may input a start calibration instruction to the controller by selecting the start calibration control.

Step S504: responding to an instruction of starting calibration control input by a user, and controlling the loudspeaker to play a preset standard sound with a first sound intensity;

in some embodiments, when the speaker plays the preset standard sound, the user needs to collect the preset standard sound played by the speaker through the control apparatus 100 or the smart device 300.

In some embodiments, when the speaker is controlled to play a preset standard sound with a first sound intensity, the display is controlled to display an audio playing interface, and the audio playing interface comprises a playing progress bar. The playing progress bar can facilitate the user to know the playing progress of the current audio. An exemplary audio playback interface is shown in fig. 8.

Step S505: receiving a first audio file, wherein the first audio file is generated by a user collecting the preset standard sound at a first position through a control device;

in some embodiments, the user may collect by pressing a voice key of the bluetooth remote control while the speaker plays a preset standard sound. After the loudspeaker stops playing the preset standard sound, the user can finish acquisition by loosening the voice key of the Bluetooth remote controller. The Bluetooth remote controller sends the collected first audio file to the controller through Bluetooth.

In some embodiments, the user may begin capturing by clicking a voice control in a user interface of the mobile phone control display device while the speaker plays a preset standard sound. After the loudspeaker stops playing the preset standard sound, the user can control the end acquisition control in the user interface of the display device to end acquisition by clicking the mobile phone. After receiving an instruction of ending the acquisition input by a user, the mobile phone sends the acquired first audio file to the controller through a network.

In some embodiments, the first position where the user is located may not be limited, that is, the user may collect the preset standard sound played by the display device at any position in front of the display device.

In some embodiments, the first position of the user is directly in front of the display device, or the first position of the user is within a preset distance from the display device. The prompt for the first position where the user is located can be displayed in a prompt page or in an audio playing interface.

In some embodiments, after receiving an instruction to initiate spatial sound field calibration, controlling a speaker to play a preset standard sound with a first sound intensity; and when the preset standard sound is played, acquiring the preset standard sound by using a sound acquisition device of the display device or the audio output device, and generating a first audio file.

Step S506: and calculating a first energy value of a preset frequency point based on the first audio file, and determining a first quantity of target-size audio data in the first audio file.

In some embodiments, preset frequency points to be adjusted can be set according to actual needs, and the number of the preset frequency points is the number of the frequency points. For example: the preset frequency points can be 120Hz,500Hz,1500Hz,5000Hz and 10000Hz, the expression mode of the frequency points can be simplified, and the frequency points are correspondingly expressed by numbers 0,1,2,3 and 4. The number of frequency points is 5. The frequency and the number of the preset frequency points are not limited.

In some embodiments, the step of calculating a first energy value for a preset frequency point based on the first audio file, and determining a first amount of target size audio data in the first audio file comprises:

reading buffer-sized audio data from an audio file;

the audio data is stored in an audio file and needs to be read using a fread function, and the buffer size (buffer size) is one of the parameters of the function, and this value can be set according to the situation. If the audio data in the audio file is less, the audio data can be read out once; if the amount of audio data in the audio file is large, the audio data is read in several times. The buffer size audio data is a target number of target size audio data. The target size may be 2, 4, 8 bytes.

fread is a function that reads data from a file stream, reads a maximum of count entries, each entry size of bytes, returns 0 if the call succeeds in returning the number of entries actually read (less than or equal to count), if unsuccessful or reads to the end of the file.

In some embodiments, the target number is 640, the target size is 2 bytes, and the buffer size audio data is read from the audio file as 640 2 byte size audio data.

Calculating a result value of the audio data with the preset frequency point corresponding to the target size by using a second-order filter difference equation;

in some embodiments, the second order filter differential equation: y (n) =b0 x (n) +b1 x (n-1) +b2 x (n-2) +a1 y (n-1) +a2 y (n-2);

where b0, b1, b2, a1 and a2 are coefficients of the filter, x (n) represents a data value (decimal representation) of the target size audio data of n times of processing; y (n) represents a result value obtained after n times of calculation; x (n-1) represents a data value of the target-size audio data processed n-1 times; x (n-2) represents a data value of the n-2 times processing target size audio data; y (n-1) represents a result value obtained after n-1 times of calculation; y (n-2) represents the result value obtained by n-2 times of calculation, and n represents the number of times of calculation.

Calculating a first energy value of a preset frequency point according to a result value of audio data of a target size corresponding to the preset frequency point;

in some embodiments, the first energy value of the preset frequency point is an accumulated result of squares of result values of the preset frequency point corresponding to all the audio data with the target size.

First energy value of frequency point

Wherein y (j) represents a result value obtained after the jth calculation, n is a first number of audio data with a target size in the audio file, and i represents a frequency point.

It should be noted that, in the embodiment of the present application, after reading audio data of a buffer size, a result value of each audio data of a target size is calculated and the squares of the result values are accumulated. After the audio data of the buffer size is calculated, whether the audio file is read is required to be judged; if the audio file is not read, the audio data of the next buffer size is read continuously and relevant calculation is carried out. If the audio file is read, step S507 is executed.

After the accumulated value of each frequency point in the audio data with one buffer size is calculated, the number of the audio data with the target size which is calculated, and the first number of the audio data with the target size in the first audio file can be counted after the audio file is read.

In some embodiments, an implementation method of calculating a first energy value of a preset frequency point based on a first audio file and determining a first amount of target size audio data in the first audio file is shown in fig. 9.

Initializing, and setting various parameters, wherein the parameters comprise the number of frequency points and various coefficients of second-order filtering. The initial value of the frequency point is 0, the number of the processed target byte audio data is 0, and the number of the calculated target size audio data is 0; wherein the number of frequency points is represented by a bandcount, the target number is represented by Q, the coefficients of the second-order filtering are represented by b0, b1, b2, a1 and a2, the number of frequency points is represented by i, the number of processed target byte audio data is represented by j, the number of target size audio data which has been calculated is represented by count, i.e., i=0, j=0, and count=0.

Step S901: reading the audio data with the target number and the target size from the audio file;

step S902: judging whether the frequency points are smaller than the number of the frequency points or not; i.e. determine i < bandcount?

If the number of frequency points is smaller than the number of frequency points, step S903 is performed: judging whether the number of the processed target byte audio data is smaller than the target number; i.e. if i < bandcount, then j < Q?

If the number of processed target bytes of audio data is smaller than the target number, step S904 is performed: calculating a target value by using a second-order filter difference equation, and calculating an accumulated value of target value squares according to the target value;

that is, if j < Q, processing the audio data of the target size: y=x×b0+ff0×b1+ff1×b2+fb0×a1+fb1×a2;

each coefficient in the above formula is a preset parameter set at the time of initialization, after each operation, the value of ff0 is assigned to ff1, the value of x is assigned to ff0, the value of fb0 is assigned to fb1, and the value of y is assigned to fb0.

power[i]＝power[i]+y*y

Step S905: adding 1 to the number of processed target byte audio data; i.e., j=j+1;

step S903 is performed after step S905;

if the number of processed target byte audio data is greater than or equal to the target number, step S906 is performed: adding 1 to the numerical value of the frequency point; i.e. if j is greater than or equal to Q, i=i+1;

Step S902 is performed after step S906;

if the number of frequency points is greater than or equal to the number of frequency points, step S907 is executed: adding the number of the calculated target-size audio data to the target number; i.e. if i is not less than the bandcount, count=count+q;

step S908: determine if the audio file is read?

If the audio file is not read, executing step S901;

if the audio file is read, determining that the first energy value of the preset frequency point is an accumulated value of target value square, wherein the first quantity of the audio data with the target size in the first audio file is the quantity of the audio data with the calculated target size, and ending the flow.

Taking five frequency points as an example, the first energy values corresponding to the frequency points 0, 1, 2, 3 and 4, namely, power [0], power [1], power [2], power [3], power [4] and the first quantity count of the target-size audio data in the first audio file, can be calculated from the above method.

Step S507: determining a first sound gain of the preset frequency point according to the first energy value, the first quantity, a preset target gain, a bandwidth and a manual adjustment offset;

in some embodiments, the step of determining the first sound gain of the preset frequency point according to the first energy value, the first number, the preset target gain, the bandwidth, and the manually adjusted offset comprises:

Converting the first energy value of the preset frequency point into a first gain of the preset frequency point according to the first quantity;

in some embodiments, the method for converting the first energy value of the preset frequency point into the first gain is as follows:

powerdb[i]＝10*log10(power[i]/count/4e-10)；

wherein, powerdb is a first gain, power is a first energy value, count is a first amount of audio data of a target size in the first audio file, and i is a frequency point.

The first gain of each preset frequency point is calculated by adopting the method. For example: powerdb [0], powerdb [1], powerdb [2], powerdb [3], powerdb [4].

Calculating a measurement gain sum according to the first gain of the preset frequency point and the bandwidth of the preset frequency point;

in some embodiments, the product of the first gain of a frequency bin and the bandwidth of the frequency bin is the sum of the gains of the frequency bin, and the sum of the gains of all the frequency bins is added to be the sum of the measured gains. For example: the gain sum sumtest = powerdb [0] +powerdb [1] +bandweight [1] +powerdb [2] +bandweight [2] +powerdb [3] +powerdb [4]. Wherein bandweight is the bandwidth.

Calculating a target gain sum according to the preset target gain of the preset frequency point and the bandwidth of the preset frequency point;

In some embodiments, the product of the preset target gain of the frequency point and the bandwidth of the frequency point is the target gain sum of the frequency point, and the target gain sum of all the frequency points is added to be the target gain sum. For example: the target gain sum sumtarget=targetdb [0] +targetdb [1] +targetdb [2] +targetdb [3] +targetdb [4]. The preset target gain and bandwidth are values set during initialization.

Calculating the ratio of the sum of the measured gains to the sum of the target gains;

ratio f1=sumetest/sumtarget;

determining a target adjustment gain of the preset frequency point based on the ratio and the preset target gain of the preset frequency point;

the target adjustment gain of the preset frequency point is the product of the ratio and the preset target gain of the preset frequency point, namely the target adjustment gain f2=f1 of the preset frequency point is targetdb [ i ].

And determining the first sound gain of the preset frequency point based on the target adjustment gain, the first gain and the manual adjustment offset.

In some embodiments, the difference between the target adjustment gain and the first gain is calculated, and the gain to be adjusted of the preset frequency point is determined, that is, the gain f3=f2-powerdb [ i ] to be adjusted of the preset frequency point. When the offset is manually adjusted to 0, the gain to be adjusted of the preset frequency point is the first sound gain of the preset frequency point.

In some embodiments, the manually adjusted offset is an offset that is manually adjustable according to the actual effect, which also needs to be considered when calculating the first sound gain. And adding the gain to be adjusted of the preset frequency point and the manual adjustment offset to obtain a first sound gain, namely, the first sound gain correctiondb [ i ] =f3+maniladjust offset [ i ], and the maniladjust offset is the manual adjustment offset.

The first sound gain may be a positive number, a negative number, or 0, as the deviation value of the sound gain.

Step S508: and calibrating a frequency response curve corresponding to the first sound intensity based on the first sound gain.

The frequency response curve is a curve which is recorded at the output end of the signal generator and generates different frequency response values along with the frequency change of the input signal. Where "frequency" refers to frequency and "response" refers to response. The abscissa of the frequency response curve is frequency, the ordinate is sound gain or sound intensity, and the unit is decibel.

And storing a frequency response curve for playing the preset standard sound with the first sound intensity in the display device.

The step of calibrating the frequency response curve corresponding to the first sound intensity based on the first sound gain comprises:

Determining an original sound gain corresponding to a preset frequency point in a frequency response curve;

calculating the sum of the original sound gain and the first sound gain of the preset frequency point to obtain a calibrated sound gain;

and drawing a calibrated frequency response curve based on the calibrated sound gain of the preset frequency point.

In some embodiments, the pre-calibration and post-calibration frequency response curves are as shown in fig. 10.

In some embodiments, spatial sound field calibration may be achieved by receiving an audio file collected by a user once.

In some embodiments, spatial sound field calibration may be performed by receiving a user-captured audio file multiple times.

In some embodiments, after the step of determining the first sound gain of the preset frequency point, the controller further performs the steps of:

receiving a second audio file sent by the control device, wherein the second audio file is generated by collecting the preset standard sound at a second position by a user through the control device;

calculating a second energy value of the preset frequency point based on the second audio file, and determining a second quantity of target-size audio data in the second audio file;

and determining a second sound gain of the preset frequency point according to the second energy value, the second quantity, the preset target gain, the bandwidth and the manual adjustment offset.

The second sound gain is the same as the first sound gain, and is not described herein.

In some embodiments, after the step of calculating the first and second sound gains, calculating an average sound gain of the first and second sound gains;

illustratively, the average sound gain of the preset frequency point= (first sound gain of the preset frequency point + second sound gain of the preset frequency point)/2.

In some embodiments, the user may be allowed to repeatedly collect 3-6 audio files, calculate the sound gain for each audio file, and calculate the average of all sound gains.

And calibrating a frequency response curve corresponding to the first sound intensity based on the average sound gain.

In some embodiments, the display is controlled to display a position prompt page after receiving a user entered instruction to select a start calibration control.

In some embodiments, the location hint page includes a user's location relationship with the display device and a start acquisition control, the user's location relationship with the display device being included directly in front of, left or right of the display device.

In some embodiments, the location hint page includes a distance of the user from the display device that includes 10cm, 50cm, and 100cm in front of the display device and a start acquisition control.

After the user finishes acquisition at the first position and the second position, respectively calculating to obtain a first sound gain and a second sound gain;

determining a first weight corresponding to the first position and a second weight corresponding to the second position;

in some embodiments, the weight directly in front of the display device is greater than the weight to the left or right of the display device.

In some embodiments, the closer to the display device the greater the weight, or the distance from the display device the greatest weight within a range that is comfortable to the user, less than that range or relatively less than that range.

Calculating a weighted average sound gain of the first sound gain and the second sound gain according to the first weight and the second weight;

for example, the weighted average sound gain of the preset frequency point= (first sound gain of the preset frequency point + second sound gain of the preset frequency point)/(first weight + second weight).

And calibrating a frequency response curve corresponding to the first sound intensity based on the weighted average sound gain.

In some embodiments, in FIG. 7, after the user selects the start calibration control 72, a location prompt page is displayed as shown in FIG. 11, after the user selects the start acquisition control 111 to start the first sound file acquisition at a location directly in front of the display device. After the acquisition is completed, a position prompt page is displayed as shown in fig. 12, and the user selects the acquisition start control 121 to start the acquisition of the second sound file after displaying the position on the left side of the device. And calculating weighted average sound gain according to the two acquisition files, and calibrating a frequency response curve corresponding to the first sound intensity based on the weighted average sound gain.

In some embodiments, the user may not be able to select the appropriate location well based on the direction of the location hint interface. The display device further comprises a camera, wherein the camera can be an external camera or a built-in camera. When receiving an instruction of starting to calibrate the control selected by a user, controlling the camera to acquire a current indoor image; drawing a preset area in the indoor image according to image coordinates, and controlling a display to display a position prompt page, wherein the position prompt page comprises a drawn indoor image, and the drawn indoor image comprises a first area control and a second area control;

in some embodiments, the camera angle of the camera may be turned downward, so that more ground images may be obtained, and a user may select a suitable position to perform spatial sound field calibration.

Receiving an instruction of a user for selecting a first area control after moving to a position corresponding to the first area control, controlling the loudspeaker to play a preset standard sound with a first sound intensity, and receiving a first audio file sent by a control device to obtain a first sound gain;

receiving an instruction of selecting a second area control after a user moves to a position corresponding to the second area control, controlling the loudspeaker to play a preset standard sound with the first sound intensity, and receiving a second audio file sent by a control device to obtain a second sound gain;

Determining a first weight corresponding to the first area control and a second weight corresponding to the second area control;

calculating a weighted average sound gain of the first sound gain and the second sound gain according to the first weight and the second weight;

and calibrating a frequency response curve corresponding to the first sound intensity based on the weighted average sound gain.

In some embodiments, in FIG. 7, after the user selects the start calibration control 72, a position prompt page is displayed as shown in FIG. 13, the position prompt page including a rendered indoor image 131 including zone controls 1311-1319 and focus 132, one for each zone control. Indoor furniture is variously arranged, and a user can select a plurality of proper positions according to the situation of the user and select a control corresponding to the positions to perform space sound field calibration operation.

In some embodiments, the camera is a depth camera. The distance and the azimuth of the user and the camera can be determined through the user image acquired by the depth camera. And determining the weight according to the distance and the direction between the user and the camera.

In some embodiments, after the step of determining the first sound gain of the preset frequency point, determining whether the first sound gain is greater than an adjustable maximum gain;

In order to protect the loudspeaker, i.e. the output power of the loudspeaker, from being too high, it is necessary to set an adjustable maximum gain value: protectitlimit, for example: the adjustable maximum gain value protectilimit is 6 db.

If the first sound gain is larger than the adjustable maximum gain, the noise is serious when the standard sound is collected. If the first sound gain is smaller than or equal to the adjustable maximum gain, the result of spatial sound field calibration is not affected enough by the absence or smaller noise and noise when standard sound is collected.

In some embodiments, if the first sound gain is greater than the adjustable maximum gain, the control display displays a first cue including a failure to calibrate the spatial sound field due to severe noise.

In some embodiments, if the first sound gain is greater than the adjustable maximum gain, the speaker is controlled to play the first alert audio whose content includes that spatial sound field calibration cannot be performed due to severe noise.

In some embodiments, after a preset time for controlling the display to display the prompt information, controlling the display to display a prompt interface for calibrating the spatial sound field,

it should be noted that, in the embodiment of the present application, the first sound gains corresponding to the plurality of frequency points are calculated, and as long as the first sound gain of one frequency point in all frequency points is greater than the adjustable maximum gain, the display is controlled to display the first prompt information.

In some embodiments, as shown in fig. 14, the alert interface includes a first alert 141 and a confirmation control 142, where the first alert 141 is to retry in a quiet environment because spatial sound field calibration cannot be performed due to serious noise.

And calibrating a frequency response curve corresponding to the first sound intensity based on the first sound gain if the first sound gain is smaller than or equal to an adjustable maximum gain.

In some embodiments, after the step of determining the first sound gain of the preset frequency point, determining whether a difference between the first gain and a preset target gain is greater than or equal to a preset gain difference;

the difference value between the first gain and the preset target gain is smaller than the preset gain difference value, which indicates that the volume of the current audio file is small and the spatial sound field calibration cannot be accurately performed. The difference value between the first gain and the preset target gain is larger than or equal to the preset gain difference value, which indicates that the volume of the current audio file can be used for calibrating the spatial sound field.

In some embodiments, if the difference between the first gain and the preset target gain is smaller than the preset gain difference, controlling the display to display second prompt information, wherein the second prompt information comprises that the spatial sound field calibration cannot be performed due to small volume;

In some embodiments, if the difference between the first gain and the preset target gain is smaller than the preset gain difference, controlling the speaker to play second prompt audio, wherein the content of the second prompt audio includes that the spatial sound field calibration cannot be performed due to small volume;

in some embodiments, after the display is controlled to display the second prompt information, the speaker is controlled to play the preset standard sound with a second sound intensity, and the second sound intensity is greater than the first sound intensity.

And storing frequency response curves corresponding to different sound intensities in the display equipment, and selecting lower sound intensity when the spatial sound field calibration is performed for the first time, namely playing preset standard sound with the first sound intensity. If the difference value between the first gain and the preset target gain is detected to be smaller than the preset gain difference value, selecting a higher level of sound intensity, namely playing a preset standard sound with a second sound intensity until the difference value between the first gain and the preset target gain is larger than or equal to the preset gain difference value.

In some embodiments, the prompt page also includes recalibration controls at the original sound intensity and boost sound intensity recalibration controls. If the problem of low volume is caused by the acquisition of the user, the user can select to recalibrate the control with the intensity of the original sound; if the user does not have a problem collecting himself, the increase sound intensity recalibration control may be selected.

And after the loudspeaker is controlled to play the preset standard sound with the second sound intensity, calculating a first sound gain by adopting the same method, and calibrating a frequency response curve corresponding to the second sound intensity based on the first sound gain.

It should be noted that, in the embodiment of the present application, the first gains corresponding to the multiple frequency points are calculated, and as long as the difference between the first gain of one frequency point and the preset target gain in all frequency points is smaller than the preset gain difference, the display is controlled to display the second prompt information.

In some embodiments, as shown in fig. 15, the alert interface includes a second alert information 151, an exit control 152, a recalibration control 153 for the original sound intensity, and a recalibration control 154 for the enhanced sound intensity, where the second alert information 152 is to be retried because the acquisition volume is small and the spatial sound field calibration cannot be performed. And receiving an instruction of selecting the sound intensity recalibration control 154 by a user, playing a preset standard sound with a second sound intensity, and calibrating the space sound field.

And calibrating a frequency response curve corresponding to the first sound intensity based on the first sound gain if the difference value between the first gain and the preset target gain is larger than or equal to the preset gain difference value.

In some embodiments, if the number of continuous spatial sound field calibration failures is detected to exceed a preset number, the application of the spatial calibration sound field is directly exited. The failure of the spatial sound field calibration means that the first sound gain is greater than the adjustable maximum gain or the difference between the first gain and the preset target gain is smaller than the preset gain difference.

In some embodiments, when files need to be acquired for multiple times, if one time of space sound field calibration fails, all data of the current round of space sound field calibration is deleted, and space sound field calibration is performed again. For example: the first sound gain is obtained by the first time of space sound field calibration, and the second sound gain is deleted and the first time of space sound field calibration is carried out again if the second time of space sound field calibration fails.

In some embodiments, when files need to be acquired for multiple times, if one time of space sound field calibration fails, deleting the data of the current space sound field calibration, and continuing the space sound field calibration. For example: the first sound gain is obtained by the first space sound field calibration, and the second sound gain is deleted and the second space sound field calibration and the calculation of the second sound gain are carried out again if the second space sound field calibration fails.

In some embodiments, if the spatial sound field calibration fails due to the first sound gain being greater than the adjustable maximum gain, i.e. the noise is severe, the data of the current spatial sound field calibration is deleted and the spatial sound field calibration is continued. If the first sound gain is larger than the adjustable maximum gain, namely the volume is small, the space sound field calibration fails, all data of the space sound field calibration of the round are deleted, the sound intensity is increased, the preset standard sound is played, and the space sound field calibration is carried out again.

In some embodiments, if it is detected that the user inputs an instruction to restore factory settings, the frequency response curve is restored to the factory reference value.

Some embodiments of the present application provide a method of spatial sound field calibration, the method being applicable to a smart device comprising a speaker, a sound collector, and a controller configured to: responding to an instruction input by a user for starting the calibration of the spatial sound field, and controlling the loudspeaker to play a preset standard sound with a first sound intensity; receiving a first audio file, wherein the first audio file is generated by the sound collector collecting the preset standard sound; calculating a first energy value of a preset frequency point based on the first audio file, and determining a first quantity of target-size audio data in the first audio file; determining a first sound gain of the preset frequency point according to the first energy value, the first quantity, a preset target gain, a bandwidth and a manual adjustment offset; and calibrating a frequency response curve corresponding to the first sound intensity based on the first sound gain. According to the method and the device, through collecting the sound attenuated by the room, according to the room acoustic correction algorithm, the sound of the intelligent device is adjusted, so that a user can enjoy better sound effects in any room with different decorations, and user experience is improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

The foregoing description, for purposes of explanation, has been presented in conjunction with specific embodiments. However, the illustrative discussions above are not intended to be exhaustive or to limit the embodiments to the precise forms disclosed above. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles and the practical application, to thereby enable others skilled in the art to best utilize the embodiments and various embodiments with various modifications as are suited to the particular use contemplated.

Claims (10)

1. An intelligent device, comprising:

a speaker;

a sound collector;

A controller configured to:

responding to an instruction input by a user for starting the calibration of the spatial sound field, and controlling the loudspeaker to play a preset standard sound with a first sound intensity;

receiving a first audio file, wherein the first audio file is generated by the sound collector collecting the preset standard sound;

calculating a first energy value of a preset frequency point based on the first audio file, and determining a first quantity of target-size audio data in the first audio file;

determining a first sound gain of the preset frequency point according to the first energy value, the first quantity, a preset target gain, a bandwidth and a manual adjustment offset;

and calibrating a frequency response curve corresponding to the first sound intensity based on the first sound gain.

2. The intelligent device of claim 1, wherein the sound collector comprises a control device, and the first audio file is a file generated by collecting the preset standard sound at the first position by the user through the control device.

3. The smart device of claim 2, wherein the controller is configured to:

receiving a second audio file, wherein the second audio file is generated by a user collecting the preset standard sound at a second position through a control device;

Calculating a second energy value of the preset frequency point based on the second audio file, and determining a second quantity of target-size audio data in the second audio file;

and determining a second sound gain of the preset frequency point according to the second energy value, the second quantity, the preset target gain, the bandwidth and the manual adjustment offset.

4. The smart device of claim 3, wherein the controller performs adjusting the frequency response curve corresponding to the first sound intensity based on the first sound gain to obtain a calibrated frequency response curve, and is further configured to:

calculating an average sound gain of the first sound gain and the second sound gain;

and calibrating a frequency response curve corresponding to the first sound intensity based on the average sound gain.

5. The smart device of claim 3, wherein the controller performing calibration of the frequency response curve corresponding to the first sound intensity based on the first sound gain is further configured to:

determining a first weight corresponding to the first position and a second weight corresponding to the second position, wherein the first position is different from the second position;

Calculating a weighted average sound gain of the first sound gain and the second sound gain according to the first weight and the second weight;

and calibrating a frequency response curve corresponding to the first sound intensity based on the weighted average sound gain.

6. The smart device of claim 1, wherein the controller performing calibration of the frequency response curve corresponding to the first sound intensity based on the first sound gain is further configured to:

and if the first sound gain of the preset frequency point is smaller than or equal to the adjustable maximum gain, calibrating a frequency response curve corresponding to the first sound intensity based on the first sound gain.

7. The smart device of claim 1, wherein the controller performs determining a first sound gain for the preset frequency point based on the first energy value, the first number, a preset target gain, a bandwidth, and a manually adjusted offset, and is further configured to:

converting the first energy value of the preset frequency point into a first gain of the preset frequency point according to the first quantity;

calculating a measurement gain sum according to the first gain of the preset frequency point and the bandwidth of the preset frequency point;

Calculating a target gain sum according to the preset target gain of the preset frequency point and the bandwidth of the preset frequency point;

calculating the ratio of the sum of the measured gains to the sum of the target gains;

determining a target adjustment gain of the preset frequency point based on the ratio and the preset target gain of the preset frequency point;

and determining the first sound gain of the preset frequency point based on the target adjustment gain, the first gain and the manual adjustment offset.

8. The smart device of claim 7, wherein the controller performing calibration of the frequency response curve corresponding to the first sound intensity based on the first sound gain is further configured to:

and calibrating a frequency response curve corresponding to the first sound intensity based on the first sound gain if the difference value between the first gain of the preset frequency point and the preset target gain of the preset frequency point is larger than or equal to the preset gain difference value.

9. The smart device of claim 8, wherein the controller is configured to:

if the difference value between the first gain of the preset frequency point and the preset target gain of the preset frequency point is smaller than the preset gain difference value, controlling the loudspeaker to play prompt audio, wherein the content of the prompt audio comprises that the spatial sound field calibration cannot be carried out due to small volume;

And controlling the loudspeaker to play the preset standard sound with a second sound intensity, wherein the second sound intensity is larger than the first sound intensity.

10. A method of calibrating a spatial sound field, comprising:

responding to an instruction input by a user for starting the calibration of the spatial sound field, and controlling the loudspeaker to play a preset standard sound with a first sound intensity;

receiving a first audio file, wherein the first audio file is generated by the sound collector collecting the preset standard sound;

calculating a first energy value of a preset frequency point based on the first audio file, and determining a first quantity of target-size audio data in the first audio file;

determining a first sound gain of the preset frequency point according to the first energy value, the first quantity, a preset target gain, a bandwidth and a manual adjustment offset;

and calibrating a frequency response curve corresponding to the first sound intensity based on the first sound gain.

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