KR102035856B1 - Volume control apparatus and system for preventing music-induced hearing loss - Google Patents

Abstract

According to an embodiment of the present invention, a user terminal for performing volume control for preventing hearing loss may include a communication unit communicating with a server supporting a volume control application, a storage unit storing information required for executing the volume control application, and a sound. Outputs the volume at the user's request and determines whether to connect the earphone when playing the content including the sound under the execution of the volume control application and the audio module receiving the external noise in order to measure the external noise, Control unit that measures the volume of the content and the volume of the external noise at the same time, calculates the user's noise exposure based on the measured volume level, and controls to output sound at an appropriate volume when the calculated noise exposure exceeds the reference value It may include.

Description

VOLUME CONTROL APPARATUS AND SYSTEM FOR PREVENTING MUSIC-INDUCED HEARING LOSS}

The present invention relates to a volume control device and system for preventing music hearing loss, and more particularly, to a device and system related to collecting volume information while executing sound content and adjusting the sound of the output content to an appropriate level. It is about.

Due to the wide spread and widespread use of smartphones, modern people can easily listen to music and watch videos by utilizing the built-in MP3 player function in their daily lives without purchasing a separate audio device. Like this, listening to music using a smart phone is mostly using earphones and has been continuously exposed to sound for a certain intensity or more. Therefore, modern people's smart phone listening method is increasing the risk of hearing loss.

In general, continuous exposure to noise with a certain level of intensity increases the risk of hearing loss. Noise-induced hearing loss caused by continuous exposure to high-intensity noise can be classified into three categories depending on the type of exposure. First, transient threshold fluctuations are temporary hearing loss caused by moderately loud noise exposure, which can restore hearing in minutes to days. Second, permanent threshold fluctuations may be applicable if hearing does not recover within three weeks without exposure to additional noise within the recovery period after a temporary threshold fluctuation. The third is hearing loss caused by strong noise exposure of more than 120dB, such as explosions, which is defined as acoustic trauma.

Recently, studies have reported that excessive noise exposure can cause hearing loss, as well as secondary effects such as headache, anxiety and sleep disorders. This problem caused by noise-induced hearing loss has reached a very serious situation, and accurate investigations and preventions are required to cope with such problems. However, the conventional research has shown that the strength of music by earphones to check earphone performance rather than the user's listening volume measurement. The subject of confirmation is dominant.

On the other hand, the prior art related to adjusting the output sound is disclosed in Korean Patent Laid-Open Publication No. 10-2005-0091460 (apparatus and method for adjusting the output volume of a mobile communication terminal sound file).

The present invention has been devised for the purpose of tracking and tracking information about a user's listening volume through earphones. Furthermore, the present invention is designed to analyze the intensity of individual music exposure, induce proper listening habits, and ultimately prevent musical hearing loss based on information about the listening volume of users collected through the application.

According to an embodiment of the present invention, a user terminal for performing volume control for preventing hearing loss may include a communication unit communicating with a server supporting a volume control application, a storage unit storing information required for executing the volume control application, and a sound. Outputs the volume in accordance with the user's request, and determines whether to connect the earphone when playing the content including the sound under the execution of the volume control application and the audio module receiving the external noise to measure the external noise, the content The controller controls the volume of the sound and the volume of external noise at the same time, calculates the user's noise exposure based on the measured volume, and outputs the sound at the appropriate volume when the calculated noise exposure exceeds the threshold. It may include.

The embodiment of the present invention makes it easy for a user to check his or her music listening pattern, and induces a restraint of listening habits that may be problematic, thereby preventing musical hearing loss.

In addition, the embodiment of the present invention not only determines the appropriate volume level and provides information on the user based on the user's usual listening pattern and external noise, but also automatically determines that the noise exposure level is unreasonable. It can be set to output sound at the volume level. Through this, the user can avoid a hearing operation that impairs the hearing that can not be perceived, and can prevent the hearing loss.

1 is a block diagram illustrating a structure of a user terminal according to an exemplary embodiment of the present invention.
2 is a diagram illustrating a configuration of a server according to an exemplary embodiment of the present invention.
3 is a view for explaining the configuration of the volume control application according to an embodiment of the present invention.
4 is a diagram illustrating an operation and a signal transmission method performed in a server according to an exemplary embodiment of the present invention.
5 is a flowchart illustrating an operation sequence of the volume control application according to an embodiment of the present invention.
6 is a view for explaining a noise exposure calculation method according to an embodiment of the present invention.
7A and 7B are diagrams for describing reliability of an application according to an exemplary embodiment of the present invention.
8A to 10B are diagrams for describing a screen configuration in an application according to an exemplary embodiment of the present invention.
11 is a diagram illustrating a data storage result screen of a server system according to an exemplary embodiment of the present invention.
12 is a block diagram showing the detailed configuration of the appropriate volume recommendation unit according to an embodiment of the present invention.
FIG. 13 is a diagram illustrating an operation of performing volume control by an appropriate volume recommending unit according to an exemplary embodiment of the present invention.

As the present invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description.

However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the drawings, similar reference numerals are used for similar elements.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may exist in the middle. Should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Also, in the present specification, the device may be a general apparatus (or thing) connected to a gateway and applied to the Internet of Things (IoT). For example, the device may be a wireless pager, smartphone, tablet PC, computer, temperature sensor, humidity sensor, acoustic sensor, motion sensor, proximity sensor, gas sensor, heat sensor, refrigerator, CCTV, TV, washing machine, dehumidifier , Lights, fire alarms, and the like. However, this is not limitative.

In this specification, a device may be used interchangeably with “device” or “device”, and “device”, “device”, and “device” may be described with the same expression.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention. Hereinafter, the same reference numerals are used for the same components in the drawings, and duplicate descriptions of the same components are omitted.

1 is a block diagram illustrating a structure of a user terminal according to an exemplary embodiment of the present invention.

Referring to FIG. 1, a user terminal 100 according to an exemplary embodiment of the present invention may include a communication unit 110, a storage unit 120, an input unit 130, a display unit 140, an audio module 150, and a camera unit 160. ), And a controller 170, and the storage unit 120 may include a sound content 121, a sound play program 122, and an earphone set value 123. The controller 170 may include an output volume measurer 171, an output corrector 172, an external noise measurer 173, a rest measurer 174, and a noise exposure calculator 175. have.

The communication unit 110 may include, for example, a cellular module, a WiFi module, a Bluetooth module, a GPS module (eg, a GPS module, a Glonass module, a Beidou module, or a Galileo module), an NFC module, and a radio frequency (RF) module. have.

The cellular module may provide, for example, a voice call, a video call, a text service, or an internet service through a communication network. According to an embodiment of the present disclosure, the cellular module may perform identification and authentication of an electronic device in a communication network using a subscriber identification module (eg, a SIM card). According to an embodiment of the present disclosure, the cellular module may perform at least some of the functions that the processor may provide. According to an embodiment, the cellular module may include a communication processor (CP).

Each of the WiFi module, the Bluetooth module, the GPS module, or the NFC module may include, for example, a processor for processing data transmitted and received through the corresponding module. According to some embodiments, at least some (eg, two or more) of the cellular module, WiFi module, Bluetooth module, GPS module, or NFC module may be included in one integrated chip (IC) or IC package.

The RF module may transmit / receive, for example, a communication signal (eg, an RF signal). The RF module may include, for example, a transceiver, a power amp module (PAM), a frequency filter, a low noise amplifier (LNA), an antenna, or the like. According to another embodiment, at least one of the cellular module, the WiFi module, the Bluetooth module, the GPS module, or the NFC module may transmit and receive an RF signal through a separate RF module.

The communication unit 110 according to an embodiment of the present invention may perform communication with a server that supports an application for volume control. The communication unit 110 may receive data and information required for the operation of the application from the server. In addition, the communication unit 110 may transmit data measured by the user terminal to the server side. In addition, the communication unit 110 may collect the location information of the user terminal and transfer it to the control unit 170 to the server 200.

The storage unit 120 may include, for example, an internal memory or an external memory. The internal memory may be, for example, volatile memory (for example, dynamic RAM (DRAM), static RAM (SRAM), or synchronous dynamic RAM (SDRAM), etc.), non-volatile memory (for example, OTPROM (one). time programmable ROM (PROM), programmable ROM (PROM), erasable and programmable ROM (EPROM), electrically erasable and programmable ROM (EEPROM), mask ROM, flash ROM, flash memory (such as NAND flash or NOR flash), hard drives, Or it may include at least one of a solid state drive (SSD).

The external memory may be a flash drive such as compact flash (CF), secure digital (SD), micro secure digital (Micro-SD), mini secure digital (Mini-SD), extreme digital (XD), It may further include a multi-media card (MMC) or a memory stick. The external memory may be functionally and / or physically connected to the electronic device through various interfaces.

The storage unit 120 according to an embodiment of the present invention may store the sound content 121, the sound playback program 122, and the earphone set value 123. The sound content 121 may mean all types of content including sound, and may include both music and a video. The sound content 121 may be separately downloaded and stored by a user, but may be temporarily stored for streaming such as a DMB according to various embodiments.

The sound reproducing program 122 refers to a reproducing program capable of reproducing content including a sound, and may include a DMB, a music reproducing program, a video executing program, and the like. According to various embodiments of the present disclosure, information on the volume adjusting step of the sound reproduction program 122 may be collected by the adjustment application, and the volume of the sound reproduction program 122 may be adjusted under the control of the volume adjustment application. For example, the sound reproduction program 122 may be classified into a program (A) in which the volume adjustment step is set in five levels and a program (B) in which the volume adjustment step is set in ten steps. Information about the volume control step that is set differently (for example, A may be 5 steps and B is 10 steps) may be collected.

The earphone set value 123 refers to a coefficient for each earphone type, and is calculated to compensate for the degree of sound recognition of the user for each earphone in consideration of characteristics that may vary depending on the contact shape of the user's ear according to the shape of the earphone. . The earphone set value 123 may mean a value for compensating for the difference in recognition volume for each earphone type measured in an artificial ear simulator (AES). Earphone type can be largely divided into kernel type, open type, etc., each of the kernel type and open type can be classified. In addition, the earphone set value 123 may include a set value for the headphones in addition to the earphone, and the headphone may have a set value that is divided according to its shape, like the earphone. The headphones may be classified into, for example, an open type or a closed type. At this time, it is very clear that there will be a difference in coefficients between the earphones and the headphones.

The earphone set value 123 is a value calculated by considering that the volume recognized by the user with respect to the same sound pressure output from the user terminal may vary depending on the type of earphone worn. Therefore, the earphone set value 123 may be presented in the form of a coefficient to be multiplied by the same sound pressure output from the user terminal side, for example, than in the case of an open earphone having a large loss rate generated during the transfer process (for example, 0.8). The coefficient (eg, 0.9) of the kernel earphone having a small loss rate may be set to have a larger value.

According to various embodiments of the present disclosure, the earphone set value may be set according to the model name of the earphone or the headphone and may include image information. And even in the case of the same kernel type or open type earphone, the earphone setting value 123 may be set differently according to the model or specific type of the earphone or the headphone, and the user may input the model name or the image to select the earpiece or the headphone that he or she uses most. Similar setpoint information can be applied.

The earphone set value 123 may be stored in the user terminal 100 in which the application is installed, but is not limited thereto and may be stored only in the server 200 side.

The input unit 130 may include, for example, a touch panel, a pen sensor, a key, or an ultrasonic input device. For example, at least one of capacitive, resistive, infrared, or ultrasonic methods may be used, and the touch panel may further include a control circuit, and the touch panel may further include a tactile layer. Thereby providing a tactile response to the user.

The input unit 130 according to an embodiment of the present invention may receive a user request related to application execution. In addition, the input unit 130 may receive information regarding the shape of the earphone connected to the user terminal for specifying the earphone set value 123 from the user. In addition, the input unit 130 may receive a user input for executing content including a sound.

The display unit 140 may include a panel, a hologram device, or a projector. The panel may, for example, be implemented to be flexible, transparent, or wearable. The panel may be composed of a touch panel and one module. The hologram device may show a stereoscopic image in the air by using interference of light. The projector may display an image by projecting light onto a screen. The screen may be located, for example, inside or outside the electronic device. According to an embodiment of the present disclosure, the display unit may further include a control circuit for controlling a panel, a hologram device, or a projector.

The display unit 140 according to an embodiment of the present invention may display an execution screen of the volume control application. For example, the display unit 140 may display a graph generated from the volume listening data of the user provided by the volume control application.

The audio module 150 may bidirectionally convert, for example, a sound and an electrical signal. At least some components of the audio module may be included in the input / output interface. The audio module may process sound information input or output through, for example, a speaker, a receiver, an earphone, a microphone, or the like.

The audio module 150 according to an embodiment of the present invention may output the sound of the corresponding content at a predetermined volume when executing the content including the sound at the request of the user. In addition, the audio module 150 may activate a microphone function to measure external noise when playing content including sound.

The camera unit 160 is, for example, a device capable of capturing still images and moving images. According to an embodiment, the camera unit 160 includes one or more image sensors (eg, a front sensor or a rear sensor), a lens, and an image signal processor (ISP). Or flash (eg, LED or xenon lamp, etc.).

The camera unit 160 according to an embodiment of the present invention is a front camera function of the user terminal at predetermined time intervals to determine whether the user is continuously listening to the sound of the corresponding content or resting while playing the content including the sound. Can be activated. According to various embodiments of the present disclosure, when a user's face is identified through the front camera when playing a video, it may be determined that this is a listening period, and a period during which the user's face is not confirmed may be determined as a rest period.

The controller 170 may also be referred to as a processor, a controller, a microcontroller, a microprocessor, a microcomputer, or the like. On the other hand, the control unit may be implemented by hardware (hardware) or firmware (firmware), software, or a combination thereof.

In the case of implementation by firmware or software, an embodiment of the present invention may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above. The software code may be stored in a memory and driven by the controller. The memory may be located inside or outside the user terminal and the server, and may exchange data with the controller by various known means.

According to an embodiment of the present invention, the control unit 170 may include an output volume measuring unit 171, an output correcting unit 172, an external noise measuring unit 173, a rest measuring unit 174, and a noise exposure calculating unit 175. It may be configured to include.

First, the output volume measuring unit 171 may perform an operation of measuring the output volume of the content executed in response to a user request. At this time, the output volume measuring unit 171 can measure the volume of the sound output to the earphone connected to the user terminal, the output volume measuring unit 171 is the sound pressure expressed in dB (decibel) unit of sound It can be measured by (Sound Pressure Level).

The output corrector 172 may control the volume size output from the user terminal 100 based on the appropriate volume information received from the server 200 supporting the volume control application. The output corrector 172 may determine whether the noise exposure amount of the user measured by the user terminal 100 exceeds a reference value. If it is determined that the measured noise exposure amount of the user exceeds the reference value, the output corrector 172 may adjust the output sound size based on the appropriate volume information for each user received from the server 200. At this time, the output correction unit 172 may display a guide message requesting to adjust the sound for adjusting the output sound of the user terminal on the screen. In addition, the output correction unit 172 may automatically adjust the output sound of the user terminal, and display a message indicating that the sound is automatically adjusted on the screen. In addition, the output corrector 172 may control the sound output value provided from the user terminal to an appropriate volume by various methods.

According to an embodiment of the present invention, the external noise measurement unit 173 measures the external noise input from the microphone of the user terminal when the earphone is connected to the user terminal and the content including the sound is reproduced in the user terminal. can do. At this time, the magnitude of the external noise may be measured by a sound pressure level. The external noise measurement operation calculates the amount of noise exposure perceived by the user by considering external noise, which is an additional noise generated in addition to the volume of the sound output through the earphone, when the user listens to the sound of the content being executed through the earphone. Can be performed.

The rest measuring unit 174 may measure a rest period during which the user stops listening to the sound during the time that the content including the sound is played. The rest measuring unit 174 may measure, for example, a period in which the earphone and the user terminal are separated while the sound content is executed as the rest period. Alternatively, the rest measuring unit 174 controls to activate the front camera when playing a video including image information and sound, and listens to the user's proximity position and sound based on the user's face information collected from the front camera. Can be determined. If the user's face is not recognized in front of the display unit of the user terminal while playing the video, the user's face may be checked and the corresponding time may be determined as the rest period. In this case, the method of recognizing the user's face may be a method of checking whether the user's face is recognized by activating the front camera at a predetermined time interval.

The noise exposure calculation unit 175 may provide information on an output volume (eg, sound pressure) of content being played back measured by the output volume measurement unit, and a volume (eg, sound pressure) of external noise measured by an external noise measurement unit. Based on this, the user's noise exposure can be calculated. The noise exposure amount may be calculated by multiplying the volume level by the time of listening to the volume. However, the present invention is not limited thereto, and the noise exposure amount may be calculated by a method including additional component factors (eg, time zone, place information, etc.) in addition to the two factors. For example, the noise exposure amount can be calculated in the manner of (time coefficient) * (duration time) * (volume size) * (place coefficient) = (noise exposure amount). At this time, the time zone coefficient may be, for example, a value in which the day time zone coefficient is set to a larger value than the night time zone coefficient. More specifically, in the time zone coefficient setting, the period from 9:00 am to 9:00 pm during the day may be regarded as a period in which the background noise is higher than the other periods. It can be set to a value.

The loudness included in the noise exposure amount calculation may be the volume information calculated by considering both the output volume information for each content applying the earphone type coefficient and the external noise measurement.

The noise exposure calculation unit 175 may calculate only the volume of the sound volume provided for the time except for the rest period measured by the break measurement unit 174 as the noise exposure amount.

As such, the noise exposure amount calculated by the noise exposure calculator 175 may be provided to the output corrector 172.

According to various embodiments of the present disclosure, the operation of the noise exposure calculation unit 175 may receive only the result value (noise exposure amount) calculated after being performed by the server 200 in the user terminal 100.

2 is a diagram illustrating a configuration of a server according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the server 200 may include a communication unit 210, a storage unit 220, and a control unit 230. The storage unit 220 may store user-specific volume information 221 and standard volume information 222. The controller 230 may include a graph generator 231, a noise manager 232, a hearing loss determiner 233, and a proper volume recommender 234.

The communication unit 210 according to an embodiment of the present invention may perform communication with the user terminal 100. The communication unit 210 may receive information related to the location of the user terminal, for example, from the user terminal 100. In addition, the communication unit 210 may receive sound-related information (content output volume information, external noise volume information, noise exposure amount information, listening time information, etc.) measured by the user terminal required for graph generation and proper volume calculation. In addition, the communication unit 210 may transmit a value calculated by the server 200 to the user terminal 100.

The storage unit 220 according to an embodiment of the present invention may store the volume information 221 and the standard volume information 222 for each user. The volume information 221 for each user may refer to volume-related information for each user received from a user terminal. The volume information 221 for each user may include, for example, average noise exposure amount for each user, initial volume level for each user, and time zone information for which the user's external noise level is greater than or equal to a reference value.

The standard volume information 222 may refer to volume information that is determined not to affect the hearing function of the user. The standard volume information 222 may be classified according to the situation, the external noise intensity, and the degree of hearing loss. The controller 230 may calculate an appropriate volume level recommended according to a user's situation by referring to the standard volume information 222 when calculating an appropriate volume for each user. For example, an appropriate volume recommended for a user who is determined to be a deafness stage 1 may be calculated to be larger than a user whose hearing ability is normal.

The controller 230 may include a graph generator 231, a noise manager 232, a hearing loss determiner 233, and an appropriate volume recommender 234.

The graph generator 231 may generate a graph that is visual data based on the volume related information received from the user terminal. According to various embodiments of the present disclosure, the graph generator 231 may generate color information of a method of displaying a color by applying a color corresponding to a risk level for each date in addition to a graph. The graph generator 231 may generate color information in a manner of matching a color corresponding to a risk based on the user's listening information for each date. Since the color information visually displays the risk of the individual listening level, the user can determine the risk at a glance.

The graph generator 231 accumulates and records volume information for each user and generates a graph based on the volume information, and displays the generated graph together with at least one of an average listening volume, a maximum listening volume, a volume level, and an ambient background noise intensity. And, the graph generated by the graph generator 231 may be provided to be displayed for each period unit (eg, hourly, daily, weekly, monthly). According to various embodiments of the present disclosure, when the change in the sound listening pattern of the user changes to a desirable level and maintains a proper level, the graph generator 231 may inform the user of this information. For example, when the generated graph reaches the recommended listening pattern and the positive change rate is greater than or equal to a predetermined value, the graph generator 231 may view the change in the listening pattern of the user by providing a reward such as a new graph background. It can be actively induced. Alternatively, the graph generator 231 may compare the graphs generated for each user, extract users who have the highest rate of change of the listening pattern, or users who observe the recommended listening pattern on a monthly or weekly basis, and provide the result to the user. In addition, the results can be ranked in account rankings to encourage users to comply with the recommended listening patterns.

The noise management unit 232 may determine a user's noise exposure status and the like based on the volume related information received from the user terminal 100 and generate data related thereto. The noise manager 232 may calculate, for example, time-average information in which the average noise exposure amount for each user, the initial volume level for each user, and the external noise size for each user are greater than or equal to a reference value. In addition, the noise management unit 232 may determine the user's noise exposure-related lifestyle patterns or habits. As the noise management unit 232 receives the real-time noise volume information and location information received from the user terminal 100, the noise management unit 232 may determine the place information that the user regularly visits and moves and the external noise information of the place where the user is going. . Accordingly, the time zone and place information where the user is most exposed to noise may be determined. For example, the noise management unit 232 according to the information received from the user terminal 100, if the intensity of noise is the strongest in the time zone from 6 am to 7:30 am and the path from subway A station to station B. Based on the user's noise exposure pattern can be calculated and information about it can be managed.

In addition, the noise management unit 232 collects the listening time zone and the location information of the user terminal in the corresponding time zone, when the sound listening time continues to exceed the preset criteria when playing the content including the sound in the user terminal; In addition, a condition for prolonging the sound listening time of the user may be calculated and provided to the user terminal. In this case, the information on the condition of the longer sound listening period may be calculated as location information, time zone information, and the like. Through this, the noise manager 232 may help the user to recognize the noise exposure pattern, and further, the noise manager 232 may control the volume output of the user terminal based on the calculated information.

The deafness determining unit 233 may perform an operation of determining whether the user is deaf or hard of hearing. The hearing loss determiner 233 may support testing a user's hearing ability on a volume adjusting application according to various embodiments of the present disclosure. In this case, the hearing loss determiner 233 may determine whether the hearing loss and the hearing loss level based on the user's hearing loss test result. In addition, the hearing loss determiner 233 may determine whether or not to hear the hearing based on the user's call information, sound content listening pattern without a separate test.

The appropriate volume recommendation unit 234 may collect information on the external noise level for each location based on real-time location information and external noise information of the user terminal received by the communication unit. According to various embodiments of the present disclosure, the appropriate volume recommendation unit 234 may provide a notification to refrain from using the earphone when approaching a specific location or a specific place section in which a noise higher than a predetermined reference value is generated.

The appropriate volume recommendation unit 234 may also adjust the individual appropriate volume based on the user's personal information (eg, average listening volume, maximum listening volume, hearing loss, hearing loss level, preferred volume level, external noise level at the current user location, etc.). Can be calculated. The appropriate volume recommendation unit 234 may calculate a recommendation value based on the user's listening pattern (eg, the usual listening volume size).

In addition, the appropriate volume recommendation unit 234 may calculate the appropriate volume of each user by adding the individual change index as a configuration factor as well as the above-mentioned individual information according to various embodiments. The change index for each individual may be determined according to a period during which the volume control is applied by the volume control application and a type of the user's response to the volume control by the volume control application. An operation of calculating an appropriate volume by applying the individual change index will be described with reference to FIGS. 12 and 13.

12 is a block diagram showing the detailed configuration of the appropriate volume recommendation unit according to an embodiment of the present invention.

FIG. 13 is a diagram illustrating an operation of performing volume control by an appropriate volume recommending unit according to an exemplary embodiment of the present invention.

Referring to FIG. 12, the appropriate volume recommendation unit 234 according to an embodiment of the present invention includes a user operation type determination unit 2341, an individual change index calculation unit 2234, and an additional operation volume recommendation unit 2343. Can be configured.

The user manipulation type determination unit 234 may perform an operation of determining whether a user has an additional manipulation and an additional manipulation type after volume control by the volume control application is performed. Referring to FIG. 13, for example, as illustrated in 1310, the volume set in the user terminal may be set in five levels (Vol. 5). The appropriate volume recommendation unit 234 may calculate an appropriate volume (volume) for each user based on configuration factors such as the volume level received from the user terminal and the time, time zone, and location of the sound output. In this case, the appropriate volume recommendation unit 234 may provide the user terminal with information on the appropriate volume for each user calculated using the factors (volume size, duration, time zone, place, etc.) shown in 1315.

When the output volume of the user terminal is automatically controlled by the calculated appropriate volume (eg, Vol. 2) (1320), the user manipulation type determination unit 2341 of the appropriate volume recommendation unit 234 may perform additional user operations 1325. ) Can determine what type it is. The type of additional operation 1325 of the user is an upward operation (e.g., Vol. 6) 1330 that is above (or above) the existing output value, or an upward operation (e.g., Vol. 4) 1345 that is below (or below) the existing output value Alternatively, if there is no additional user operation, it may be determined whether or not it is 1355.

The individual change index calculator 2234 may calculate a change index to be included in a later calculation of the appropriate volume according to the type of additional operation of the user determined by the user operation type determination unit 2341. According to various embodiments of the present disclosure, the individual change index may be generated and applied only when an additional operation 1325 occurs after the automatic volume control 1320 is performed per content. The personal change index calculator 2234 may set the change index 1350 so as not to change the change index when the additional manipulation of the user is performed by an upward manipulation (eg, Vol. 4) 1345 below the existing output value. Accordingly, the appropriate volume of the corresponding user may be controlled to the same value as the initial automatic volume control 1320. That is, if the change index is not changed, the appropriate volume may be calculated based on the same criteria as at the time of initial control.

On the other hand, if the user manipulation type determination unit 2341 determines that there is no additional manipulation by the user (for example, Vol. 2), the individual change index calculation unit 2342 may control to increase the change index of the user (1360). Can be. On the other hand, if the change index is increased, the appropriate volume recommendation unit 234 may calculate the appropriate volume for each user later to be closer to the standard volume than the previously calculated proper volume. For example, assuming that the standard volume is 0.5, but the appropriate volume for each user is calculated as 2, the appropriate volume may be adjusted from 2 to 1 as the change index increases. The index of change can be increased until the standard volume of 0.5 is calculated to be the appropriate volume.

If the user's additional operation type is an upward operation (eg, Vol. 6) 1330 that is greater than or equal to an existing output value, the additional operation volume recommendation unit 2343 may immediately control the additional operation. If the additional operation volume recommending unit 2343 determines that the additional operation is performed by an upward operation that is equal to or greater than the existing output value (eg, Vol. 5), the additional operation volume recommendation unit 2343 performs an operation of negotiating the output value to an average of the appropriate volume and the volume value requested by the user. can do. The result of the trade-off of output value for the first addition operation (eg operation with Vol. 6) is Vol. If it is 4, the existing output value (value requested by the user before the second additional operation) is Vol. 6 when the user adds the secondary additional operation (upwards over the existing output value, eg, Vol.8). Is vol. 8, the result of the tradeoff of output value is Vol. Can be 7. As such, when the additional manipulation is an upward manipulation above the existing output value, the additional manipulation volume recommending unit 2343 may apply the following Equation 1 for the compromise of the output value.

(Vol _a is the existing output volume value, Vol _b is additional control volume value, Vol _c is a compromised output value)

Further, the additional fine volume recommending unit 2343 may make an output value trade-off by applying Equation 1 even after the user further manipulates the output value of the user terminal after the user's output value is controlled by the negotiated output value. . According to various embodiments of the present disclosure, an output value compromise performed by the additional manipulation volume recommending unit 2343 may be set not to exceed a predetermined number of times in the same content. Alternatively, the output value compromise performed by the additional manipulation volume recommending unit 2343 may be set not to exceed a predetermined number of times (eg, three times) within a preset time (eg, one minute). When the output value compromise is generated by the additional manipulation volume recommending unit 2343, the individual change index calculator 2342 may control 1340 to lower the change index.

If the individual change index calculator 2234 lowers the change index as in 1240, the proper volume recommendation unit 234 may later reduce the adjustment level when calculating the appropriate volume for each user. That is, as the value of the change index increases, an appropriate volume close to the standard volume may be calculated, and as the value of the change index increases, an appropriate volume close to the user's listening volume may be calculated. For example, assuming that the standard volume is 2, the user's listening volume is 6, and the change volume is 0, the proper volume is calculated as 4, and the change index value is increased from 0 to 1 for more powerful control. By performing the appropriate volume can be calculated as 3. In the same assumption, if the value of the change index is lowered from 0 to -1, the control level may be relaxed to yield an appropriate volume of 5.

Hereinafter will be described the operation and data configuration of the volume control application according to an embodiment of the present invention.

3 is a view for explaining the configuration of the volume control application according to an embodiment of the present invention.

The application according to an embodiment of the present invention, for example, Android Studio 2.2.1 and Android software object-oriented language (Java Development Kit, JDK; Oracle, San Francisco, CA, USA) ) It can be designed by applying Android Software Development Kits (SDK, ver. 5.1.1 and ver. 4.4.2, Google, Mountain View, CA, USA) based on 1.8.0_66b-18 amd64. The application according to an embodiment of the present invention measures the average intensity (LZeq), the maximum sound pressure intensity (LCpeak), the background noise intensity (dB SPL) of the sound output through the earphone connected to the Android smartphone and store in the database The stored data may be designed to analyze the volume heard by the user on a daily / weekly / monthly basis.

Specifically, the average intensity of the sound source is divided into hours of use by quantifying the sound pressure coming out of the earphone when the music file such as mp3 or wav is reproduced in dB SPL, and the maximum sound pressure intensity is the corresponding time (the time when the earphone is running and running. DB SPL (Sound Pressure Level), which is the highest value, can be obtained by quantifying. This algorithm is similar to the existing noise measuring system, so detailed description thereof will be omitted. According to various embodiments of the present disclosure, the stored data may be designed to be easily understood by the user by analyzing the actual exposure of each user based on the date of use in real time and displaying the result in a graph and text format.

Referring to the design of the application in more detail as shown in Figure 3, the application may be largely composed of a service (Service) and activity (Activity). The service is a component that runs indefinitely regardless of whether an application is displayed or not, and may be responsible for data measurement and data transmission. An activity acts as a display of an application and can be largely composed of a main activity and a fragment.

First, a service may include a measurement and correction part and a presence or absence of earphone connection. In more detail, the service part may be in charge of measuring and correcting the volume of the sound being heard by the user, checking whether the earphone is connected, component communication, and server communication. The Sampling Meter can also perform volume measurement, data correction, transmission and stop functions. In the case of the measurement function, the volume data output from the actual Android to the earphone is measured, and data correction can calculate the difference between the volume output from the earphone and the volume data value output from the Android, and calculate the current volume level value. The presence of earphone connection is to check the earphone connection status of Android. Finally, component communication transmits the volume data measured by the service to the activity, and server communication transmits the measured volume data to the server in real time. The user's data may be measured, for example, at 1 second intervals and set to communicate at 5 second intervals.

The activity may be responsible for the overall screen configuration of Android, and may play a role of executing a background service. In addition, the activity manages a lower fragment (Fragment) and may be responsible for the movement between the fragments. The activity of the developed application can be composed of one main activity, and the tab view can be used to move the lower fragments. Each tab can consist of headphones, graphs, calendars, and setup images.

The main activity may manage the activities and fragments in total, and may start a service and communicate through an intent. The screen of the Main Activity may consist of an option bar and two image bars, and the lower fragment may be set to four. Service startup can be started automatically when the activity is activated. Volumes measured in a service may be received through an intent, and the values may be transmitted to a sampling fragment in real time and displayed on a screen. In addition, the user's account information may be designed to register with the server to distinguish the users. That is, according to an embodiment of the present invention, the main activity (main activity) can be designed to automatically identify the user and transmit the user information to the server system, and to check and register the server registration.

Fragment components are sub-concepts of activities, which allow you to organize multiple screens from one activity. This application is a sampling fragment that can check the current measurement (Sampling Fragment), a graph fragment (Graph Fragment) that can check the measured values so far, a calender fragment that tells you whether you belong to the risk group based on the user's measurements (Calendar Fragment), may be configured as a setting fragment (Setting Fragment) that can check the user's account information.

4 is a diagram illustrating an operation and a signal transmission method performed in a server according to an exemplary embodiment of the present invention.

Referring to FIG. 4, a server system according to an embodiment of the present invention may include Apache (server system), Hypertext Preprocessor (PHP), and Application Performance Management of My Structured Query Language (MySQL). It can mean the server PC installed. The server system may be largely composed of a data receiving portion and a transmitting portion. The data receiving portion may be configured to receive and store data transmitted from the client system in real time, and the data transmitting portion may request data requested from the client system. You can inquire according to the format and send it to the client system.

The Apache server is a server that connects PHP pages between the client system and the server system. The Apache server may serve to connect the requested part of the client system to the PHP page.

The database system (storage unit) required to store and manage data can be configured using MySQL, and each data can be configured as shown in Table 1.

Column name Date type AVGSPL Double PEAKSPL Double Volume Intent User Varchar (255 bytes) Time Date time

(AVGSPL; average sound preesure level, PEAKSPL; peak sound pressure level)

In this case, in order to prevent collision of various data, each user may be designed to generate one table. In order to distinguish users, the table name may be set as, for example, an ID of a user's Google account.

Hereinafter, referring to FIGS. 5 and 6 to describe the operation sequence through the application.

5 is a flowchart illustrating an operation sequence of the volume control application according to an embodiment of the present invention. Specifically, FIG. 5 illustrates a sequence of operations in which the noise exposure amount measurement and the volume control operation of the user are performed through the volume control application.

In the user terminal 100, the controller 170 may check an application request for volume control according to an embodiment of the present invention and perform operation 510 of executing the corresponding application. Thereafter, the controller 170 may perform operation 515 for checking the earphone connection. Thereafter, the controller 170 may perform operation 520 of executing content including sound according to a user request. At this time, the content including the sound may include music, video, and the like.

The controller 170 may perform operation 525 of measuring output sound and external elements. In this case, since the controller 170 confirms that the earphone is connected to the user terminal in operation 515, the controller 170 may measure the sound volume of the content output through the earphone in operation 525. In addition, during operation 525, the controller 170 may collect volume (sound pressure) information of the external noise, user location information, and the like that are external elements.

Thereafter, the controller 170 may perform operation 530 of calculating a sound volume recognized by an actual user. The sound volume recognized by the actual user may be calculated by multiplying the type-specific coefficient of the earphone by the output content volume.

Thereafter, the controller 170 may perform operation 535 for determining whether the corresponding volume is maintained for a predetermined period or more. As such, if the volume is not maintained for more than a predetermined period, it may not be regarded as a valid sound listening function. If the result of operation 535 corresponds to Yes, the controller 170 may perform operation 540 to measure the noise exposure amount. The noise exposure amount may mean a volume level in consideration of a user's sound listening time. The controller 170 may consider only the listening time excluding the rest period when measuring the user's noise exposure amount. This will be described in more detail with reference to FIG. 6.

6 is a view for explaining a noise exposure calculation method according to an embodiment of the present invention.

In the noise exposure calculation method according to the embodiment of the present invention, as shown in FIG. 6B, the rest period 613 is checked, and the volume information measured during the rest period is not considered when calculating the noise exposure amount. If the noise exposure amount is calculated without checking the rest period during the sound listening period, the noise exposure amount will be measured as shown in A of FIG. 6, and thus the measured noise exposure amount (area of the graph) is determined by the area shown in 612 and 611. As much as difference can occur.

 The controller 170 may perform operation 545 for accumulating and recording measurement information after operation 540 for measuring the noise exposure amount. According to various embodiments of the present disclosure, the measurement information may be transmitted to the server 200 and managed. Thereafter, the controller 170 may perform operation 550 to determine whether hearing loss and provide appropriate volume information. According to various embodiments of the present disclosure, operation 550 may be an operation of receiving and displaying a result of the analysis and calculation at the server 200 based on the information measured by the user terminal.

7A and 7B are diagrams for describing reliability of an application according to an exemplary embodiment of the present invention.

When the application according to the embodiment of the present invention is reproduced through the earphone connected to the user terminal, whether the sound pressure intensity of the sound source is accurately represented according to the volume level may be confirmed as shown in FIGS. 7A and 7B. When the sound content is played, the value measured by the sound level meter and the artificial ear simulator after connecting the earphone to the smartphone is calculated according to whether the application is executed or the application itself. Sound pressure intensities can be measured by simulation techniques to ensure that they match. For example, using a noise meter (type # 2250, Bruel & Kjær, Denmark) and a half-inch microphone (type # 4192, Bruel & Kjær), the sound pressure intensity from the earphones (Xiaomi PISTON 3, Beijing, China) is artificial. It can be measured by connecting to an ear simulator (type # 4153, Bruel & Kjær) and a 2 cc coupler (type # 4946, Bruel & Kjær). In addition, for example, a noise measuring instrument and a 1 / 2-inch microphone for free-field (type # 4189, Bruel & Kjær) may be applied to check whether the external noise coming from the smartphone's microphone is accurately represented.

Alternatively, according to an embodiment of the present invention, as the volume is increased by one step in a smartphone composed of a total of 16 steps (0 to 15 volumes), does the intensity of sound output through the earphone match the value measured by the sound level meter? You can ensure the reliability of the values measured by the application by checking whether or not. Figure 7a shows the mean intensity (LZeq) when (1) measured directly in the noise meter and the artificial ear simulator during music playback, (2) measured in the noise meter and the artificial ear simulator during application execution, and (3) applying the values measured in the application. ) And the maximum intensity (LCpeak) of the sound are within 5 dB. Figure 7b shows that the measured value of the external noise is within 5 dB as a result of checking in five places whether the difference in the measured value in the smartphone microphone through the noise measuring system and the developed application.

8A to 10B are diagrams for describing a screen configuration in an application according to an exemplary embodiment of the present invention.

8A and 8B, an initial screen of a developed application may be largely classified into five types (image bar, option bar, graph view, seek bar, and text view). The image bar on the operation and stop screens can be used to show whether the volume data is measured in the application service. When listening to music using the application, the option bar can be used to select the criteria for outputting the graph so that the button functions as a color button and a white button when the music is stopped.The graph can be output hourly, daily, weekly or monthly. Can be. In addition, the graph view, which serves to output the average volume data currently being measured to the equalizer, can be operated according to the volume level and listening environment, and seeks to output differently as the volume level value of the Android smartphone changes in real time. bar can be used. A text view can be displayed to display the measurement data on the screen so that the user can easily understand the current listening condition, as shown in the average listening volume, peak listening volume, volume level, and ambient background noise intensity. It can be represented by text. FIG. 8A shows a screen in an active state and FIG. 8B shows a screen in a stationary state, which can be confirmed by a difference (eg, color difference) of button states of an option bar.

9A to 9D, an average and maximum listening volume of the accumulated listening volume are displayed in a graph for easy understanding by the hourly, daily, weekly, and monthly by operating the application. In the case of Figure 9a shows the hourly graph, the hourly graph is a total of 24 hours in one hour unit 24 hours from 5:00:00 am to 4:59:59 am the next day in consideration of the user's life patterns Can be presented as bar graphs and data. In the daily graph illustrated in FIG. 9B, a total of 31 data from the first day to the last day of each month may be displayed in the same manner as the hourly. As shown in FIG. 9C, the weekly graph may show weekly average data from the first week to the last week of each month. As illustrated in FIG. 9D, the monthly graph may display the average volume of each month corresponding to January through December of each year in the same manner.

10A and 10B illustrate a calendar screen and a setting view screen according to an embodiment of the present invention.

According to various embodiments of the present disclosure, in the application, the average volume intensity heard during the day based on the corresponding date may be analyzed and presented in a plurality of colors (eg, three colors) by using a calendar notation method. . This allows the user to check his listening habits at a glance. For example, the first color (e.g. green) means listening to music at a safe listening volume with an intensity of 0 to 50 dB SPL or less, and the second color (e.g. yellow) to less than 51 to 85 dB SPL (warning). Level), and the third color (eg, red) may indicate differently by color coding that music has been listened to above 85 dB SPL (danger level), so that the user can identify the individual listening pattern by themselves.

As shown in FIG. 10B, the user account information may be loaded in preset storage information (eg, Google account information linked to the Android of each user) and output to the text view.

11 is a diagram illustrating a data storage result screen of a server system according to an exemplary embodiment of the present invention.

According to an embodiment of the present invention, as shown in FIG. 11, the server may store the average listening volume, the highest listening volume, the volume level, the user account, and the time data item of the data transmitted from the client system. The received data may be stored according to the database table structure through the save.php page every predetermined transmission period (for example, once every 5 seconds).

Although the present invention has been described in detail with reference to the above examples, those skilled in the art can make modifications, changes, and variations to the examples without departing from the scope of the invention. In short, in order to achieve the intended effect of the present invention, it is not necessary to separately include all the functional blocks shown in the drawings or to follow all the orders shown in the drawings in the order shown; Note that it may fall within the scope.

100: user terminal
110: communication unit
120: storage unit
130: input unit
140: display unit
150: audio module
160: camera unit
170: control unit
171: output volume measurement unit
172: output correction unit
173: external noise measuring unit
174: break measurement unit
175: noise exposure calculation unit
230: control unit of the server
231: graph generator
232: Noise management unit
233: hearing loss judgment
234: proper volume recommendation unit

Claims (11)

Communication unit for communicating with a server that supports the volume control application;
A storage unit which stores information required to execute the volume control application;
An audio module for outputting sound at a volume level according to a user's request, and receiving external noise to measure an external noise;
When playing content including sound under execution of the volume control application, it is determined whether the earphone is connected, the volume of the content and the volume of external noise are simultaneously measured, and the user's noise exposure is calculated based on the measured volume. And a controller configured to control to output sound at an appropriate volume when the calculated noise exposure amount exceeds a reference value.
The control unit
An output volume measuring unit measuring an output sound pressure level of the corresponding content in order to obtain an output volume level of the reproduced content;
An external noise measurement unit for measuring a sound pressure level of external noise input by the audio module to calculate a volume of external noise; And
A noise exposure calculator configured to calculate a user's noise exposure based on the sound pressure measured by the output volume measurer and the sound pressure measured by the external noise measurer;
When the video content is played while the earphone is connected, the rest measuring unit for determining whether the user's face is recognized as a rest period by determining whether the user's face is recognized according to whether the user's face is recognized; ,
The noise exposure calculation unit
The sound pressure of the content output during the content playback time is measured, and the user's noise exposure is calculated based on the playback time and the sound pressure output during the playback time.
When there is a rest period determined by the rest measuring unit, a noise exposure amount of the user is calculated based on the sound pressure output during a time other than the rest period,
The noise exposure amount according to the earphone type is calculated by applying coefficients for each earphone type to the output sound pressure measured by the output volume measuring unit,
The earphone type coefficient is
It is a value calculated to compensate for the difference in recognition volume for each earphone type measured by an artificial ear simulator (AES),
The server supporting the volume control application is
Based on the volume-related information provided from the communication unit, calculates the place information that the user regularly moves, the outside noise information of the place, the time zone and the place information that the user is exposed to noise above the reference value, and receives the real time received by the communication unit A device that collects information on the external noise level by location based on the location information and external noise information, and provides a notification to refrain from using the earphone when approaching a specific location or a section of a place where noise exceeding a preset threshold is generated. A user terminal for performing a volume control for preventing the hearing loss of music. delete delete delete delete The method of claim 1,
The control unit
Based on the appropriate volume for each user received from the server, it is determined whether the noise exposure of the user exceeds the reference value, and if the noise exposure of the user exceeds the reference value, the output volume is automatically changed to the appropriate volume for each user. A user terminal for performing a volume control for preventing hearing loss, characterized in that it comprises an output correction unit for providing a notification of the change. In the server supporting the volume control application of the user terminal,
A communication unit for receiving real-time location information and external noise information from the user terminal and receiving volume information of the content sound output when the content including the sound is reproduced in the user terminal in real time;
Generates the user's preferred volume information and graph based on the volume information for each user received through the communication unit, and compares the standard volume information with the received volume information for each user to determine the user's hearing loss level information, the hearing loss level And a controller configured to calculate an appropriate volume based on information and a user's noise exposure received from the user terminal in real time, and retransmit the calculated appropriate volume to the user terminal.
The control unit
Based on the volume-related information received from the user terminal, determine the place information that the user regularly moves and the external noise information of the place, and based on the place information and the external noise information of the place, the user noise above the reference value Noise management unit for calculating the time zone and place information exposed to the;
Collects information about the external noise level for each location based on real-time location information and external noise information of the user terminal received by the communication unit, and earphones when approaching a specific location or a specific place section where noise above a predetermined reference value occurs Proper volume recommender for providing a notification to refrain from using;
The user terminal
When playing a content including sound under execution of the volume control application, the output sound pressure level of the content and the sound pressure level of external noise are measured, and based on the measured output sound pressure and sound pressure of external noise. To calculate the user's noise dosage,
While the video content is being played while the earphone is connected, it is determined that the user's face is not recognized as the rest period, and when it is determined that the rest period exists, the sound pressure is output based on the sound pressure output during the rest period. To calculate your noise exposure
A server for calculating a noise exposure amount according to earphone type by applying a coefficient for each earphone type, which is a value calculated to compensate for the difference in recognition volume for each earphone type measured by an artificial ear simulator (AES). The method of claim 7, wherein
The control unit
Accumulate and record volume information for each user, and generate a graph based on the volume information, and display the generated graph together with at least one of an average listening volume, a maximum listening volume, a volume level, and an ambient background noise intensity, and displaying the generated graph for a period. And a graph generator for generating color information visually indicating the risk of individual listening level by matching a color corresponding to a risk level based on the user's date listening information. delete The method of claim 7, wherein
The appropriate volume recommendation unit
When playing the content including the sound in the user terminal, if the sound listening time is longer than the preset criteria, collecting the listening time zone and the location information of the user terminal in the corresponding time zone, the user long listening time A server, characterized in that to calculate the loss conditions provided to the user terminal. In the volume control system for preventing hearing loss composed of a user terminal and a server,
The user terminal
Communication unit for communicating with a server that supports the volume control application;
A storage unit which stores information required to execute the volume control application;
An audio module for outputting sound at a volume level according to a user's request, and receiving external noise to measure an external noise;
When playing content including sound under execution of the volume control application, it is determined whether the earphone is connected, the volume of the content and the volume of external noise are simultaneously measured, and the user's noise exposure is calculated based on the measured volume. And a controller configured to control to output sound at an appropriate volume when the calculated noise exposure amount exceeds a reference value.
The control unit
An output volume measuring unit measuring an output sound pressure level of the corresponding content in order to obtain an output volume level of the reproduced content;
An external noise measurement unit for measuring a sound pressure level of external noise input by the audio module to calculate a volume of external noise; And
A noise exposure calculator configured to calculate a user's noise exposure based on the sound pressure measured by the output volume measurer and the sound pressure measured by the external noise measurer;
When the video content is played while the earphone is connected, the rest measuring unit for determining whether the user's face is recognized as a rest period by determining whether the user's face is recognized according to whether the user's face is recognized; ,
The noise exposure calculation unit
The sound pressure of the content output during the content playback time is measured, and the user's noise exposure is calculated based on the playback time and the sound pressure output during the playback time.
When there is a rest period determined by the rest measuring unit, a noise exposure amount of the user is calculated based on the sound pressure output during a time other than the rest period,
A noise exposure amount according to the earphone shape is calculated by applying coefficients for each earphone type to the output sound pressure measured by the output volume measuring unit.
The earphone type coefficient is
Performing a volume control for the prevention of musical hearing loss, characterized in that it is a value calculated to compensate for the difference in recognition volume for each earphone type measured by an artificial ear simulator (AES),
The server is
Receive real-time volume information of the content sound output when the content including the sound in the user terminal, and generates the user's preferred volume information and graph based on the received volume information for each user, and the standard volume information and the Compare the received volume information for each user to determine the user's hearing loss level information, calculate an appropriate volume based on the hearing loss level information and the user's noise exposure received in real time from the user terminal, and calculates the appropriate volume Resend to the terminal,
Based on the volume-related information provided from the user terminal, calculates place information that the user regularly moves, external noise information of the place, time zone and place information where the user is exposed to noise above a reference value, and received from the user terminal. Collecting information on the external noise level by location based on real-time location information and external noise information, and providing a notification to refrain from using the earphone when approaching a specific location or a section of a place where noise exceeds a predetermined threshold. Volume control system for the prevention of musical deafness.

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