KR102072920B1 - Speaker device with visualization function and control method of visualization function - Google Patents

Abstract

The present invention discloses a speaker device with a visualization function and a control method of the visualization function. According to one aspect of the present invention, the speaker device with the visualization function classifies sounds into frequency domains using a Fourier transform and visualizes the classified frequency domains using liquid and/or light such as water, thereby providing a user with sounds to express an emotional sense.

Description

Speaker device with visualization function and control method of visualization function

The present invention relates to a speaker device having a visualization function and a control method of the visualization function, and more particularly, not only provides a sound such as music through an output unit, but also converts an output voice signal into a frequency domain, The present invention relates to a speaker device having a visualization function for visualizing and expressing a voice signal through water and / or light according to a frequency domain, and a method of controlling the visualization function.

Generally, a speaker is a device that converts an electrical signal generated by an audio device into sound. Such a speaker includes a frame, a magnetic circuit installed in the frame, and a vibrometer vibrating by the magnetic circuit.

The magnetic circuit is for forming a magnetic field, which has a coil in the magnet portion and allows a current to flow therethrough, and the center pole, yoke and plate are magnetized by the magnet to guide the magnetic flux from the magnet into the gap (between the bobbin and the plate). .

The voice coil is wound around the voice coil bobbin, and the hollow part of the voice coil bobbin inserts a center pole and receives the electric input from the amplifier to operate the voice coil bobbin up and down.

The damper connecting the outer circumferential surface of the upper end of the voice coil bobbin and the inner circumferential surface of the frame allows the voice coil to move in the center of the gap, and the voice coil and the diaphragm are in the correct position in the stopped state.

By such a configuration, when the AC current signal output through the amplifier is conducted to the voice coil, the voice coil bobbin moves up and down, the diaphragm vibrates, and the air facing the diaphragm moves according to the vibration of the diaphragm.

This movement of air is transmitted to the human ear as sound waves, and the human ear perceives these sound waves as sounds.

In listening to the sound through such a speaker, many attempts have been made to visualize the sound in order to enhance the inspiration, and a representative one of them is displayed through an equalizer. For example, when the player provided in the main body screen and / or computer of the audio device as shown in FIG. 1 is displayed, the frequency of sound is visualized and expressed according to the frequency domain while music is output, or as shown in FIG. 2. When the media player is running, the sound pressure level may be displayed on the equalizer as music is output.

However, there is a limit to expressing the emotional sense of music in the same way as the conventional method, and a situation in which a speaker of a form is required to further stimulate human emotion.

Korea Patent Registration No. 10-1874752 (July 4, 2018 notification)

The present invention has been proposed to solve the above problems, and provides a speaker device and a method of controlling the visualization function, which is capable of expressing a sound such as music emotionally as well as through the hearing. There is this.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by one embodiment of the present invention. It will also be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof indicated in the claims.

According to an aspect of the present invention, there is provided a speaker device having a visualization function, including: a housing member; Liquid and LED appearance protection unit installed on the upper side of the housing member; A speaker unit installed at one side of the housing member to convert an input electrical signal into a form of sound wave and output the sound wave; An LED unit installed at an upper side of the housing member and emitting different colors according to the converted frequency region of the output voice signal; A liquid ejecting unit positioned at the center of the LED unit for ejecting liquids present at different positions according to the converted frequency range of the output voice signal; And a liquid recovery part located at a circumference of an outer region of the upper side of the housing member to recover the injected liquid.

The liquid recovery part is positioned around the outer region of the upper side of the housing member, and is inclined so as to have a predetermined inclination toward the outer side from the inner side.

The liquid recovery part is located around the outer region of the upper side of the housing member, characterized in that formed in the 'V' shape.

When the user manipulates the volume control unit before the user turns on the power supply unit, the liquid ejection unit sprays the liquid in proportion to the intensity of the sound output through the speaker unit using standby power.

When the user turns on the power supply unit (ON), it checks the remaining charge of the battery unit, characterized in that to emit in a predetermined color through the LED unit.

According to another aspect of the present invention, there is provided a method of controlling a visualization function in a speaker device, the method including: converting and outputting an input electrical signal into a form of sound wave; Classifying the output voice signal into different frequency domains using a Fourier transform; Injecting liquid by operating the liquid ejecting unit according to a preset condition based on the classified different frequency ranges; And emitting the predetermined color by operating the LED unit based on the classified different frequency ranges.

Before converting and outputting the input electrical signal in the form of sound waves, further comprising the step of applying a power, the step of applying the power, when electricity is continuously applied through a power connection is in a charged state Emitting a predetermined color through the LED unit; And checking the remaining charge amount of the battery unit when electricity is not continuously applied through the power connection unit, comparing the remaining charge amount with a preset threshold value, and emitting a predetermined color through the LED unit according to the result. It is characterized by.

Prior to the step of applying the power, when the user manipulates the volume control unit before turning on the power supply unit, spraying liquid in proportion to the intensity of sound output through the speaker unit using standby power; Characterized in that it comprises a.

According to an aspect of the present invention, the sound is classified by frequency domain using a Fourier transform, and the classified frequency domain may be visualized using a liquid and / or light, such as water, and provided to the user to express an emotional sense. have.

In addition, when the classified frequency region is visualized through a liquid such as water and provided to the user, there is an effect of making the user feel a refreshing feeling.

In addition, the speaker device according to the present invention can be used for interior decoration by visualizing sound through water and / or LED as well as a sound device, and can also be used as a lighting device in a dark room through LED.

Effects obtained in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the following description. .

The following drawings attached to this specification are illustrative of the preferred embodiments of the present invention, and together with the specific details for carrying out the invention serve to further understand the technical spirit of the present invention, the present invention to such drawings It should not be construed as limited to the matters described.
1 to 2 are diagrams showing an example of a general sound pressure display method;
3 is a diagram schematically illustrating a configuration of a speaker device to which a visualization function is added according to an embodiment of the present invention;
4 is a cross-sectional view of the liquid recovery unit according to an embodiment of the present invention;
5 is a cross-sectional view of a liquid recovery unit according to another embodiment of the present invention;
6 is a rear view of the speaker device according to an embodiment of the present invention;
7 is a schematic flowchart of a control method of a visualization function according to an embodiment of the present invention.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, except to exclude other components unless specifically stated otherwise. In addition, the “…” described in the specification. “Unit” refers to a unit that processes at least one function or operation, which may be implemented in hardware, software, or a combination of hardware and software.

3 is a diagram schematically illustrating a configuration of a speaker device to which a visualization function is added according to an embodiment of the present invention.

Referring to FIG. 3, the speaker device 100 according to the present embodiment includes a housing member 110, a liquid and LED appearance protection unit 120, a speaker unit 130, an LED unit 140, and a liquid injection unit ( 150 and a liquid recovery part 160.

The housing member 110 may form a space in which a plurality of electronic components and / or components may be installed in relation to the speaker device 100, and may have a rectangular shape having a predetermined length in one direction.

The liquid and LED appearance protection part 120 may be installed on the housing member 110. The liquid and LED appearance protection unit 120 is installed on the housing member 110 to serve to protect the LED unit 140 and the liquid injection unit 150 to be described later. According to the present embodiment, since the sound, such as music, is visually represented through the water of the liquid ejecting unit 150, which will be described later, a liquid to prevent foreign matter such as dust from being caught in the liquid ejecting unit 150 from the outside. And it is preferable to include the LED appearance protection unit 120 on the housing member 110. In addition, the liquid and LED appearance protection unit 120 serves to prevent the liquid ejected from the liquid jet unit 150 to be described later do not leak to the outside. In order to perform the above-described function, the liquid and LED appearance protection unit 120 is preferably formed of a transparent acrylic material. That is, the liquid and the LED appearance protection unit 120 is transparent so that a person of the water emitted through the LED unit 140 and / or the liquid ejecting unit 150 to be described later can be visually confirmed, the external impact It is preferable that it is formed of a safe material that is not easily broken even when receiving.

The speaker unit 130 is installed at one side of the housing member 110 to convert the input electrical signal into the form of sound waves and output the same. That is, the speaker unit 130 converts the input electrical signal into a voice signal through an internal circuit and outputs it for the user to hear.

The LED unit 140 may emit different colors according to the converted frequency region of the voice signal that is installed and output on the upper side of the housing member 110. In more detail, the controller (not shown) may classify the voice signal output in the form of sound waves by the speaker unit 130 into different frequency domains using a Fourier transform, and different colors according to the classified frequency domains. Can emit. On the other hand, since the Fourier transform is a known technique, a detailed description thereof will be omitted. In this case, different colors emitted may be preset in each frequency region and stored in a storage unit (not shown), and the controller may match colors matched for each frequency region stored in the storage unit (not shown) according to the classified frequency region. With reference to the corresponding color can be controlled to be emitted through the LED unit 140.

On the other hand, the LED unit 140 starts from the RGB standard R: 255 G: 0 B: 0, G increases from 0 to 255 gradually becomes red to yellow, and then R falls from 255 to 0 gradually green Then, B rises from 0 to 255 and becomes sky blue, and G falls from 255 to 0 and gradually becomes blue. Finally, R rises from 0 to 255 and becomes purple, and finally R: 255 G: 0 B: 0 becomes red. At this time, the change in color emitted from the LED unit 140 takes 20 seconds in one cycle.

The liquid ejection unit 150 may inject the liquid according to the converted frequency region of the voice signal output by being positioned at the center of the LED unit 140. In more detail, the controller (not shown) may classify the voice signal output in the form of sound waves by the speaker unit 130 into different frequency domains using a Fourier transform, and may determine a predetermined position according to the classified frequency domains. The liquid jet unit 150 may operate to eject water to visually display a voice signal. On the other hand, since the Fourier transform is a known technique, a detailed description thereof will be omitted. For example, when the liquid injection unit 150 is composed of all six, the liquid injection unit 150 from the first liquid injection unit 150 to the sixth liquid injection unit 150 according to the classified frequency range is one of the liquid injection unit 150 It can work. That is, when the first liquid injection unit 150 is 16 Hz to 60 Hz (ultra-low range, sub-bass), the second liquid injection unit 150 is 60 Hz to 250 Hz (low frequency, bass), and the third liquid When the injection unit 150 is 250Hz ~ 2kHz (medium-low range, Low-Mids), the fourth liquid injection unit 150 is 2kHz ~ 4kHz (medium-high range, High -Mids), the liquid injection unit 5 150 is a case of 4kHz ~ 6kHz (high range, Presense) and the sixth liquid injection unit 150 may spray a liquid (for example, water) in the case of 6kHz ~ 20kHz (ultra-high range, Brilliance). In this case, since the frequency range that can be heard by humans is 20 Hz to 20 kHz, the frequency domain is classified by frequency domain within the region.

The liquid recovery unit 160 performs dynamics to recover the liquid injected from the liquid injection unit 150. In detail, the liquid recovery unit 160 is positioned around the outer region of the upper side of the housing member 110, but is preferably inclined to have a constant inclination toward the outer side from the inner side. That is, the liquid recovery unit 160 may be located at a different height from the liquid injection unit 150, so that when the liquid is injected, it is possible to more efficiently recover the injected liquid. At this time, the liquid recovery unit 160 may be formed with a hole (not shown) formed so that the recovered liquid flows to the liquid storage unit (not shown). At this time, although there may be one hole (not shown), it is preferable that a plurality of holes are formed for smooth recovery of the liquid. On the other hand, the liquid recovered from the liquid recovery unit 160 may be recovered to a liquid storage unit (not shown) located inside the housing member 110, the liquid recovered in the liquid storage unit (not shown) It may be injected through the sand 150.

Meanwhile, the liquid recovery unit 160 may be configured in various forms to efficiently recover the liquid injected from the liquid injection unit 150.

4 to 5 show various examples of the liquid recovery unit 160 according to the present embodiment.

First, referring to FIG. 4, the liquid recovery unit 160 may be formed to be inclined to have a predetermined inclination from the inner side to the outer side, but may be formed to be inclined so that the inner side where the liquid injection unit 150 is located is lower than the outer side. have. In this case, a hole A connected to the liquid storage unit (not shown) may exist in the inner region where the liquid ejecting unit 150 is positioned and the boundary region where the inclination of the liquid recovery unit 160 ends. In this case, although the number of holes A may be singular, it is preferable that a plurality of holes A be provided along the upper outer region of the housing member 110.

Next, referring to FIG. 5, the liquid recovery part 160 may be formed around the outer region of the upper side of the housing member 110, and may have a 'V' shape. In this case, a hole A connected to the liquid storage part (not shown) may exist in the fine area of the liquid recovery part 160 having a 'V' shape. In this case, although the number of holes A may be singular, it is preferable that a plurality of holes A be provided along the upper outer region of the housing member 110.

As described above, the liquid recovery part 160 is described as being formed in an inclined plate shape to have a predetermined inclination around the upper outer region of the housing member 110, but is not limited thereto, and the entire liquid recovery part 160 is described. May be formed in a hole shape.

Meanwhile, the speaker device 100 according to the present embodiment may include various components related to the operation and / or control of the speaker device 100 on one side of the rear part of the housing member 110 described above.

6 is a rear view of the speaker device according to an embodiment of the present invention.

Referring to FIG. 6, the speaker device 100 according to the present exemplary embodiment includes a volume adjusting unit 610, a wireless communication unit 620, a power connection unit 630, a wired communication unit 640, and a power supply unit 650.

The volume controller 610 adjusts the output voice signal, that is, the pitch of the sound. The volume adjusting unit 610 may decrease the volume of the variable resistor when the clock is turned clockwise to increase the volume, and increase the volume of the variable resistor when the clock is turned counterclockwise.

The wireless communication unit 620 may enable the speaker device 100 and the user terminal to perform Bluetooth communication. At this time, the wireless communication unit 620 is composed of a button, when the user presses the button is in a pairing standby state with the user terminal existing within the communication range, when the user terminal accepts the pairing, the speaker device 100 and the user terminal Can be connected via Bluetooth communication. At this time, a sound such as music may be played through the user terminal connected through Bluetooth.

The power connection unit 630 may receive power from the outside to charge the battery unit installed inside the housing member 110 or to supply power to the speaker device 100 while charging. In this case, the power connection unit 630 may be a terminal having a specification of a 5-pin Micro-USB (5V 2A) that can also be used as an Android mobile phone charger. In this case, when the power connection unit 630 is connected, the green unit may be output to the LED unit 140 to inform the user that the speaker device 100 is being charged.

The wired communication unit 640 supports a 3.5 stereo Aux cable and can receive an electric signal by connecting a wire without using a Bluetooth function.

The power supply unit 650 may be in the form of a push button, and may control on / off of the speaker device 100. When the power unit 650 is turned on, the power charged in the battery unit is supplied to the speaker device 100, and when the power unit 650 is off, the power supply to the speaker device 100 may be disassembled. have. On the other hand, when the power supply unit 650 is turned on by the user, it is possible to emit a predetermined color through the LED unit 140 by checking the remaining charge amount of the battery unit. For example, when the power supply unit 650 is turned on by the user, the controller (not shown) may check the remaining charge amount of the battery unit, and compare the residual charge amount with a preset threshold value to the LED unit 140. Can be output via That is, when the preset threshold value is 50, the controller (not shown) may output green through the LED unit 140 to notify the user that the battery unit is sufficiently charged when the remaining charge amount of the battery exceeds 50. When the remaining charge amount of the battery is less than 50, a red color may be output through the LED unit 140 to inform the user that the battery unit needs to be charged.

On the other hand, when the user operates the volume control unit 610 before turning on the power supply unit 650, the liquid is sprayed in proportion to the intensity of the sound output through the speaker unit 130 using the standby power You can. Devices that emit sound, such as the speaker device 100, may be output when the power is turned on in a set volume state before the power is turned off. At this time, when the volume state previously set is very large, when the speaker device 100 is turned on without the user's knowledge, the user may be surprised at the sound, but as described above, the power unit 650 is turned on. When the volume control unit 610 is operated before the liquid is injected in proportion to the intensity of the sound output through the speaker unit 130, the volume state is intuitively checked before the speaker device 100 is turned on. If the set volume state is very large, the volume state may be set low through the volume control unit 610. In other words, when the state of the volume is set very loud without the user knowing himself, it is possible to prevent surprise due to loud sound when the speaker device 100 is operated.

Meanwhile, in the present embodiment, the components included in the speaker device 100 are described as operating individually, but the present invention is not limited thereto and may be controlled by a controller (not shown).

Hereinafter, a method of controlling a visualization function in the speaker device 100 described above with reference to FIG. 7 will be described.

7 is a schematic flowchart of a control method of a visualization function according to an embodiment of the present invention.

In describing the present embodiment, since the Fourier transform is a known technique, detailed description thereof will be omitted.

Referring to FIG. 7, first, the speaker device 100 converts an input electric signal into a sound wave form and outputs the sound wave (S710).

Next, the speaker device 100 classifies the output voice signal into different frequency domains using a Fourier transform (S720).

Next, the speaker device 100 injects the liquid by operating the liquid ejecting unit 150 according to a preset condition based on the classified different frequency ranges (S730). The speaker device 100 may visually display a voice signal by operating the liquid ejecting unit 150 at a predetermined position according to the classified frequency region to eject water.

Next, the speaker device 100 emits a predetermined color by operating the LED unit 140 based on the classified different frequency ranges (S740). In this case, different colors emitted may be preset in each frequency region and stored in the storage unit (not shown), and the speaker device 100 may store the frequency region stored in the storage unit (not shown) according to the classified frequency region. The corresponding color may be controlled to be emitted through the LED unit 140 by referring to the matched color.

8 is a view showing in more detail the flow of the operation of the liquid jet in accordance with the classified frequency according to an embodiment of the present invention.

Referring to FIG. 8, first, the speaker device 100 converts an input electrical signal into a sound wave form and outputs the sound wave (S810).

Next, the speaker device 100 classifies the output voice signal into different frequency domains using a Fourier transform (S820).

At this time, the liquid jet unit 150 at a predetermined position is operated according to the classified frequency range to eject water to visually display a voice signal. According to this embodiment, the liquid injection unit 150 may be composed of all six, and the liquid injection unit 150 from the liquid injection unit 150 to the sixth liquid injection unit 150 according to the classified frequency range of any one liquid The sander 150 may operate. For example, when the first liquid injection unit 150 is 16 Hz to 60 Hz (ultra-low range, Sub-Bass), the second liquid injection unit 150 is 60 Hz to 250 Hz (low range, Bass), the third liquid When the injection unit 150 is 250Hz ~ 2kHz (medium-low range, Low-Mids), the fourth liquid injection unit 150 is 2kHz ~ 4kHz (medium-high range, High -Mids), the liquid injection unit 5 150 is a case of 4kHz ~ 6kHz (high range, Presense) and the sixth liquid injection unit 150 may spray a liquid (for example, water) in the case of 6kHz ~ 20kHz (ultra-high range, Brilliance).

Therefore, the speaker device 100 injects liquid by operating the liquid ejecting unit 150 when the classified frequency region is included in 16 Hz to 60 Hz, and twice when the classified frequency region is included in 60 Hz to 250 Hz. Inject the liquid by operating the liquid injector 150, and when the classified frequency range is included in the 250Hz ~ 2kHz 3 operating the liquid injector 150 to inject the liquid, the classified frequency range is 2kHz ~ 4kHz When included in the liquid injection unit 150 to operate the liquid jet unit 150, if the classified frequency range is included in the 4kHz ~ 6kHz operating the liquid injection unit 150 to spray the liquid 5, and the classified When the frequency domain is included in the 6kHz ~ 20kHz it is possible to spray the liquid by operating the liquid injection unit 150 (S831 to S836).

Next, the speaker device 100 emits a predetermined color by operating the LED unit 140 based on the classified different frequency ranges (S840).

Methods according to an embodiment of the present invention can be implemented in the form of program instructions that can be implemented as an application or executed through various computer components, and recorded on a computer readable recording medium. The computer-readable recording medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the computer-readable recording medium may be those specially designed and configured for the present invention, and may be known and available to those skilled in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical recording media such as CD-ROMs, DVDs, and magneto-optical media such as floptical disks. media) and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device may be configured to operate as one or more software modules to perform the process according to the invention, and vice versa.

While this specification contains many features, such features should not be construed as limiting the scope of the invention or the claims. In addition, the features described in the individual embodiments herein can be implemented in combination in a single embodiment. Conversely, various features described in a single embodiment of the present specification can be implemented individually in various embodiments or in combination as appropriate.

Although the operations have been described in a particular order in the drawings, they should not be understood as being performed in a particular order as shown or in a sequence of successive orders, or all of the described actions being performed to obtain a desired result. Multitasking and parallel processing may be advantageous in certain circumstances. In addition, it should be understood that the division of various system components in the above-described embodiments does not require such division in all embodiments. The app components and systems described above may generally be packaged in a single software product or multiple software products.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawing.

100: speaker device
110: housing member
120: liquid and LED appearance protection
130: speaker unit
140: LED part
150: liquid jet
160: liquid recovery unit
610: volume control
620: wireless communication unit
630: power connection
640: wired communication unit
650: power supply

Claims (8)

A housing member;
Liquid and LED appearance protection unit installed on the upper side of the housing member;
A speaker unit installed at one side of the side surface of the housing member to convert an input electrical signal into a form of sound wave and output the sound wave;
A plurality of LED units disposed at an upper side of the housing member at predetermined intervals and emitting different colors according to the converted frequency range of the output voice signal;
A liquid ejecting unit which is located at the center of the LED unit and injects liquid according to the converted frequency range of the output audio signal; And
And a liquid recovery part located at a circumference of an outer region of the upper side of the housing member to recover the injected liquid.
The plurality of LED units and the liquid ejecting unit positioned at the center of the plurality of LED units and the liquid ejecting unit may emit a specific color and liquid, respectively, according to the converted frequency range of the output audio signal to visually generate the voice signal. Speaker device with a visualization function, characterized in that for representing. The method of claim 1,
The liquid recovery unit,
Located around the outer region of the upper side of the housing member,
Speaker device with a visualization function, characterized in that formed inclined so as to have a predetermined inclination from the inner side to the outer direction. The method of claim 1,
The liquid recovery unit,
Located around the outer region of the upper side of the housing member,
Speaker device with a visualization function, characterized in that formed in the 'V' shape. The method of claim 1,
The liquid jet unit,
When the user manipulates the volume control unit before turning on the power unit, the speaker device with visualization function, wherein the liquid is sprayed in proportion to the intensity of the sound output through the speaker unit using standby power. . The method of claim 1,
When the user turns on the power supply,
Speaker device with a visualization function, characterized in that for checking the remaining charge amount of the battery unit and emitting in a predetermined color through the LED unit. delete In the control method of the visualization function in the speaker device to which the visualization function is added,
Converting the input electrical signal into a sound wave and outputting the sound wave;
Classifying the output voice signal into different frequency domains using a Fourier transform;
Injecting liquid by operating a liquid ejecting unit according to a preset condition based on the classified different frequency ranges; And
And emitting a predetermined color by operating the LED unit based on the classified different frequency ranges.
Before the step of converting the input electrical signal into the form of sound waves and outputting,
Further comprising applying power;
Applying the power,
Emitting a preset color through the LED unit when electricity is continuously applied through the power connection unit in a charged state; And
And checking the remaining charge amount of the battery unit when the electricity is not continuously applied through the power connection unit, comparing the remaining charge amount with a preset threshold value, and emitting a predetermined color through the LED unit according to the result. The control method of the visualization function characterized by the above-mentioned. The method of claim 7, wherein
Before the step of applying the power,
When the user manipulates the volume control unit before turning on the power supply unit, spraying the liquid in proportion to the intensity of the sound output through the speaker unit by using standby power; Control method.

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