Method for sleep music playback based on sleep brainwave timeline

Abstract

The present invention relates to a method and apparatus for generating and playing user-customized sleep music based on a sleep brainwave timeline. The method of the present invention is based on a first sound source input from a user terminal and a sleep target time, and includes the following steps. First, a processor obtains the first sound source and the sleep target time from the user terminal and selects one of a plurality of second sound sources composed of an ordered combination of multiple types of sub-sound sources determined according to the length of the sleep target time. Subsequently, the processor generates and configures a third sound source based on the combination and order of sub-sound sources of the first sound source and the selected second sound source, having a length corresponding to the sleep target time and having a sleep start sub-sound source (SA) placed at the forefront. The generated third sound source is first output through the user terminal, and is configured to subsequently output an alarm sub-sound source (SW) after the playback of the sound source is completed. The present invention improves sleep quality by providing acoustic stimuli optimized for each stage of sleep and can maximize the user's sleep efficiency through a personalized sleep environment. Furthermore, the present invention supports the user in monitoring their sleep process by providing the remaining sleep time and the status of the currently playing sound source in real time through a user interface (UI). This system can contribute to the generation of user-customized sleep music, increased sleep efficiency, and the promotion of natural waking.

Description

Technology Field

[0001] The present invention relates to a method for playing sleep music, and more specifically, to a technology for inducing and optimizing sleep by generating and playing user-customized music based on a sleep brainwave timeline. The present invention can contribute to improving the quality of sleep by utilizing a user terminal and a processor to generate a combination of sub-sound sources suitable for the target sleep time and the user's condition. Background Technology

[0003] In modern society, sleep quality is emerging as a crucial factor in maintaining physical and mental health, leading to the development of various technologies to induce or improve sleep. In particular, technologies that induce or deepen sleep by stimulating brainwaves using sound sources of specific frequencies are garnering attention.

[0004] Existing sleep induction technologies are generally limited to playing music with fixed patterns or frequency-based sound sources, and have limitations in that they fail to adequately reflect the user's target sleep time or individual sleep needs. Furthermore, these technologies often struggle to achieve effective sleep induction because they do not account for the changes in brainwaves according to sleep stages.

[0005] To overcome these limitations, the present invention proposes a technology that can improve sleep quality and provide a personalized sleep experience by generating a combination of sub-sound sources appropriately configured according to the user's sleep target time and playing them based on a sleep brainwave timeline.

[0006] The prior art Korean Patent Publication KR20110050403A describes a "method and system for brain synchronization." The problem to be solved

[0008] The present invention has as its main objective the improvement of sleep quality by generating and playing sub-sound sources suitable for the user's target sleep time and each sleep stage. Existing technologies have the problem of not sufficiently reflecting the individual sleep needs of users and not considering sleep stages based on brainwave changes.

[0009] The present invention proposes a method for effectively inducing a sleep state by generating a combination of sub-sound sources customized for the user according to a target sleep time. This provides the user with an optimized sleep experience and can increase sleep efficiency.

[0010] Furthermore, by providing frequencies and sound patterns suitable for each sleep stage—such as onset, deep sleep, and REM sleep—it optimizes sleep stages and supports natural transitions during sleep. This helps users achieve deeper and more stable sleep.

[0011] In addition, an interface that provides visual feedback to the user device during sleep music playback is implemented to enhance the user experience and enable effective monitoring of sleep stages. This allows for the provision of a more intuitive and useful sleep management tool to the user. means of solving the problem

[0013] The above method begins with a step in which a processor obtains a first sound source and a sleep target time from a user terminal. Subsequently, depending on the length of the sleep target time, one of a plurality of second sound sources is selected, each consisting of a sleep brainwave timeline, i.e., an ordered combination of multiple types of predetermined sub-sound sources. The selected second sound source is designed to satisfy the sleep target time and the user's requirements.

[0014] The processor generates and configures a third sound source based on the combination and sequence of sub-sound sources of the first sound source and the selected second sound source, wherein the third sound source has a length corresponding to the target sleep time and a sleep start sub-sound source (SA) is positioned at the forefront. The generated third sound source is a customized sound source designed to induce and maintain the user's sleep and has a structure suitable for the sleep process.

[0015] Finally, the processor controls the user terminal to output a generated third sound source, and after the output of the third sound source is completed, to subsequently output an alarm sub-sound source (SW). Through this, the user can effectively receive support for all stages from sleep induction to waking.

[0016] However, the means for solving the problem of the present invention are not limited thereto and are further explained in the specific details for implementing the present invention. Effects of the invention

[0018] According to the present invention, the quality of a user's sleep can be improved by combining and generating sub-sound sources suitable for the target sleep time and each sleep stage. The method of the present invention provides personalized sleep music based on a sleep brainwave timeline, thereby inducing a natural and efficient sleep process from the onset of sleep to deep sleep and wakefulness.

[0019] Since the order and combination of sub-sound sources are dynamically configured according to the user's target sleep time, it offers the flexibility to meet individual needs. This provides users with a more suitable sleep environment, allowing them to maximize sleep efficiency and the effects of relaxation.

[0020] In addition, visual feedback provided to the user device alongside sleep music playback allows for an intuitive understanding of the sleep state, enhancing the convenience of sleep management. The user experience is improved by enabling real-time checking of the frequency information of the currently playing sub-track and the remaining sleep time through the user interface (UI).

[0021] In addition, the technology of the present invention supports the user's psychological stability and physical recovery by optimizing sleep stages through the design and placement of sound sources based on brainwave stimulation. Brief explanation of the drawing

[0023] FIG. 1 is an exemplary diagram illustrating the components of a sleep music playback device based on a sleep brainwave timeline according to one embodiment of the present invention. FIG. 2 is a drawing for explaining a sub-sound source according to an embodiment of the present invention. FIG. 3 is a drawing for explaining a second sound source according to an embodiment of the present invention. FIG. 4 is a drawing for explaining a third sound source according to an embodiment of the present invention. FIG. 5 is a flowchart for explaining the first embodiment of generating a third sound source according to one embodiment of the present invention. FIG. 6 is a flowchart for explaining a second embodiment of generating a third sound source according to one embodiment of the present invention. FIG. 7 is a diagram illustrating a method for generating a third sound source by taking into account deep sleep and daytime sleep according to an embodiment of the present invention. FIG. 8 is an illustrative diagram for explaining a UI according to an embodiment of the present invention. FIG. 9 is a flowchart illustrating a sleep music playback method based on a sleep brainwave timeline according to an embodiment of the present invention. Specific details for implementing the invention

[0024] Various embodiments are described with reference to the drawings. In the present invention, various descriptions are provided to facilitate an understanding of the invention. However, it is evident that these embodiments can be practiced without such specific descriptions.

[0025] The term "or" is intended to mean an implicit "or" rather than an exclusive "or." That is, unless otherwise specified or evident from the context, "X uses A or B" is intended to mean one of the natural implicit substitutions. In other words, if X uses A; if X uses B; or if X uses both A and B, "X uses A or B" may apply to any of these cases. Furthermore, the term "and / or" as used in this invention should be understood to refer to and include all possible combinations of one or more of the enumerated related items.

[0026] Furthermore, the terms “comprising” and / or “comprising” should be understood to mean that such features and / or components are present. However, the terms “comprising” and / or “comprising” should be understood not to exclude the presence or addition of one or more other features, components and / or groups thereof. Additionally, unless otherwise specified or clearly evident from the context to indicate a singular form, the singular in the present invention and claims should generally be interpreted to mean “one or more.”

[0027] And, the term "at least one of A or B" should be interpreted to mean "a case including only A," "a case including only B," and "a case combined with the composition of A and B."

[0029] FIG. 1 is an exemplary diagram illustrating the components of a sleep music playback device (100) based on a sleep brainwave timeline according to an embodiment of the present invention. The present invention aims to effectively induce sleep in a user and improve the quality of sleep by generating and playing user-customized sleep music based on a sleep brainwave timeline.

[0030] To this end, the present invention configures the system by selecting a suitable combination from a preset combination of sub-sound sources based on the sleep target time entered by the user and a first sound source, and generating a third sound source suitable for sleep based on this. The generated sleep music is designed to support the entire process from the onset of sleep to waking up, and maximizes sleep efficiency by providing sound source patterns suitable for each stage.

[0031] In addition, the present invention provides visual feedback to a user terminal (200) to enable monitoring of the sleep process and to be utilized as an intuitive sleep management tool. Through this, the user is provided with a personalized sleep experience and can get higher quality sleep.

[0032] A device (100) designed to describe components for implementing the sleep music playback method described in claim 1 of the present invention may be configured to include a processor (110), memory (120), and network (130), as in a conventional computing device.

[0033] The processor (110) is a device that performs the core operation of the present invention, and acquires a first sound source and a sleep target time input from a user terminal (200), and performs the role of generating optimized sleep music by selecting a combination of suitable sub-sound sources according to the sleep target time. In addition, it transmits the generated sleep music to the user terminal (200) to control playback and executes a command to output an alarm sub-sound source subsequently.

[0034] The memory (120) serves to store and manage data necessary for the process in which the processor (110) generates and plays sleep music. This may include data of multiple types of sub-sound sources determined in advance, rules for the combination of sub-sound sources, and data on the first sound source and sleep target time input by the user. The memory (120) supports efficient data access during the sleep music generation process and contributes to the dynamic generation of user-customized sound sources.

[0035] The network (130) supports data transmission and interaction between the user terminal (200) and the device (100). Through this, it can receive a first sound source and sleep target time information from the user, and provide the generated sleep music and alarm sound source to the user terminal (200). In addition, the network (130) enables additional sound source data or algorithm updates through a connection with an external data source.

[0036] These components interact to implement the sleep brainwave timeline-based sleep music playback method of the present invention, and contribute to providing user-customized sleep music and improving the quality of sleep.

[0037] Hereinafter, embodiments of the present invention will be described in detail together with the drawings. Prior to the description, the present invention relates to a sleep music playback method and apparatus based on a sleep brainwave timeline, and is intended to improve the user's sleep quality through sound sources adaptively designed according to the sleep state.

[0038] It is known that the average sleep brainwave cycle occurs in a period of about 90 minutes. This is a general periodic pattern observed during the repetition of various sleep stages, such as wakefulness, REM sleep, light sleep, and deep sleep. In the present invention, based on this average sleep brainwave cycle, a second sound source and a third sound source can be configured according to the sleep brainwave timeline.

[0039] To predict the average sleep brainwave cycle, the present invention can learn individual sleep patterns by collecting and analyzing the user's existing sleep data. In addition, it is preferable to apply a default value of approximately 90 minutes based on general demographic data. This is because most users tend to follow a sleep cycle of approximately 90 minutes.

[0040] The reason a specific 90-minute cycle is desirable is that designing a sleep timeline based on it allows for the provision of stimulation optimized for each sleep stage without disrupting the user's natural sleep cycle. This design improves sleep quality and helps users wake up more naturally and comfortably.

[0041] A third sound source configured based on the sleep brainwave timeline of the present invention designed in this manner may consist of a sleep start sub-sound source (SA), an intermediate sub-sound source (SM1, SM2, etc.), and an alarm sub-sound source (SW). Each sub-sound source can be adjusted according to the user's target sleep time and brainwave cycle, and is provided in a customized manner according to the user's characteristics.

[0043] FIG. 2 is a drawing for explaining a sub-sound source according to an embodiment of the present invention.

[0044] This describes the composition and role of sub-sound sources used in a sleep music playback method based on a sleep brainwave timeline. The sub-sound sources used in this invention are designed to provide optimized acoustic stimulation for all sleep stages, including the onset, maintenance, and awakening of sleep.

[0045] The Sleep Initiation Sub-sound (SA) is a sound source designed to induce sleep onset in users, featuring a stable frequency band and soft sound patterns. This provides users with a sense of psychological stability, contributing to the relief of tension and the induction of a relaxed state during the early stages of sleep.

[0046] Specifically, the frequencies for the specific brainwave stimulation described above are designed to provide appropriate stimulation according to the user's sleep state, and each frequency has the following characteristics as shown in [Table 1] below.

[0047] [Table 1]

[0048]

[0049] It includes alpha waves to induce a state of relaxation during sleep. Alpha waves have a frequency range of 8Hz to 14Hz, which are effective in relieving physical tension and inducing a sense of psychological stability. Alpha waves play a role in reducing stress and leading the user to a relaxed state during the pre-sleep phase.

[0050] Theta waves are utilized to induce REM sleep. With a frequency of 4 to 8 Hz, theta waves provide a deep sense of psychological stability and naturally induce a dreaming state. They facilitate the transition to the REM sleep stage and play an important role in memory processing and emotional stability.

[0051] It includes delta waves to enhance deep sleep. Delta waves consist of frequencies ranging from 0.5 Hz to 4 Hz and promote the body's recovery and regeneration. Delta waves are activated during the deep sleep stage and contribute to recovering from fatigue and increasing nervous system stability.

[0052] Beta waves are used to induce wakefulness and REM sleep simultaneously. Beta waves have a frequency of 12 Hz to 30 Hz and support the activity of maintaining a state of wakefulness or dreaming during REM sleep. By stimulating high brainwave activity, it is possible to promote mental alertness and harmoniously regulate circadian rhythms.

[0053] These frequencies may be applied individually, or, if necessary, at least one frequency may be arranged repeatedly or configured in an ordered combination. This design is intended to provide the user with an optimal sleep environment, improve sleep quality, and maintain circadian rhythms in harmony.

[0054] The first intermediate sub-sound source (SM1) includes a frequency for specific brainwave stimulation and pink noise, and is played in combination with the first sound source input by the user. The specific brainwave stimulation frequency consists of alpha waves, theta waves, etc., and is used to induce the user's brainwaves into a relaxed state or transition them into a deep sleep state. Pink noise is included throughout the sleep music (sub-sound source) to contribute to enhancing mental and physical stability.

[0055] The second intermediate sub-source (SM2), similar to the first intermediate sub-source, contains specific brainwave stimulation frequencies and pink noise, but focuses on maintaining and stabilizing sleep. It provides a more continuous and stable frequency pattern, helping users naturally transition between sleep stages and maintain a deep sleep state.

[0056] The third intermediate sub-sound source (SM3) consists solely of pink noise, maximizing mental and physical stability. This sub-sound source is designed to ensure that sleep is not disturbed even during changes in sleep stages, providing continuous and comfortable sleep.

[0057] The alarm sub-sound source (SW) is designed to induce user arousal and includes specific brainwave stimulation frequencies, such as beta waves, suitable for wakefulness. This sound source supports a gentle awakening, minimizing stress during the process of waking up from sleep.

[0058] The present invention supports all stages from the onset of sleep to waking up through the combination and configuration of such sub-sound sources, and provides a user-customized sleep environment through the harmony of specific brainwave stimulation and pink noise. Figure 2 visually illustrates the interaction of these sub-sound sources and the roles of each component, helping the user to clearly understand the operating principle of the present invention.

[0060] FIG. 3 is a drawing for explaining a second sound source according to an embodiment of the present invention.

[0061] The second sound source consists of sub-sound sources that can be included in the third sound source, which is the final result generated in the method of the present invention. The second sound source is designed to be suitable for the characteristics of each sleep stage and is a result of combining sub-sound sources to match the user's sleep target time.

[0062] The second sound source is designed to meet the requirements of sleep stages, such as sleep onset, maintenance, deep sleep, and REM sleep. To this end, each sub-sound source of the second sound source has a unique playback length and characteristics and may include pink noise, whether combined with the first sound source, and a frequency for specific brainwave stimulation.

[0063] Some sub-sounds included in the second sound source can be played in combination with the first sound source. This supports the personalization of the sleep experience by utilizing sounds preferred or familiar to the user. Whether or not to combine with the first sound source is determined by reflecting the design purpose of the sub-sounds and the requirements of each sleep stage.

[0064] The frequency for specific brainwave stimulation is one of the important components of the second sound source and is designed to suit each stage of sleep. Alpha waves induce a state of relaxation during the onset of sleep, while theta and delta waves support deep sleep. Beta waves can be utilized during REM sleep and the wakefulness stages. These brainwave stimulation frequencies regulate the user's brainwave state to induce responses appropriate for each sleep stage.

[0065] The second sound source is designed to meet the user's sleep target time and sleep stage requirements through the combination and sequence of sub-sound sources. These sub-sound sources provide an optimized sleep environment throughout the entire process, from sleep onset to maintenance, deep sleep, and wakefulness, supporting a personalized sleep experience.

[0066] A sub-sound source is a component included in a third sound source, which is the final result generated in the method of the present invention, and may be composed of elements of a second sound source designed to be suitable for the characteristics of each stage of sleep. Such a sub-sound source is designed to suit each sleep stage, such as REM sleep or deep sleep, and can provide an optimal sleep environment for each stage.

[0067] Each sub-sound source has a unique playback length and may include pink noise, whether it is combined with a first sound source, and a frequency for specific brainwave stimulation. Pink noise provides mental and physical stability, while the frequency for specific brainwave stimulation is used to induce or adjust the user's brainwave state to elicit responses suitable for sleep stages. Additionally, some sub-sound sources are combined with the first sound source input by the user and played back, thereby providing a user-customized sleep experience.

[0069] FIG. 4 is a drawing for explaining a third sound source according to an embodiment of the present invention. The third sound source is generated by a combination of a second sound source and a first sound source and is a result designed to provide user-customized sleep music. The third sound source is configured to satisfy a sleep target time set by the user, and an alarm sub-sound source (SW) may be played after the playback of the third intermediate sub-sound source (SM3) or the second sound source is finished.

[0070] The third sound source has a length corresponding to the sleep target time and includes components suitable for each sleep stage, such as sleep onset, maintenance, deep sleep, and REM sleep. These components are dynamically combined according to the sleep target time, and the sub-sound source of the second sound source and the first sound source are harmoniously combined to provide an optimal environment for sleep induction and maintenance. For example, the third sound source may include a portion in which the first sound source and the second sound source are played simultaneously.

[0071] The structure of the third sound source has the following characteristics. First, the Sleep Initiation Sub-sound Source (SA) is located at the forefront of the third sound source and induces the user to fall asleep. The SA provides a sense of psychological stability through stable frequencies and soft sound patterns, and supports the initial stages of sleep by inducing a state of relaxation.

[0072] Intermediate sub-sound sources (SM1, SM2, SM3) of the second source are positioned behind the sleep initiation sub-sound source, and these sub-sound sources support sleep maintenance and deep sleep. The intermediate sub-sound sources are designed based on specific brainwave stimulation frequencies, pink noise, and whether they are combined with the first source, satisfying the user's needs for each sleep stage. The first source is a user-customized element, and the source selected by the user is combined with the characteristics of the sub-sound sources to provide personalized sleep music.

[0073] The third sound source plays in timed with the sleep target, and playback of the sleep music stops when the target time is reached. The third sound source contributes to improving sleep quality by providing the user with optimal acoustic stimulation for each sleep stage. For example, the user experiences a calming sleep sub-sound at the onset of sleep, recovers mind and body through sub-sounds that support deep and restful sleep during the middle stage, and can naturally wake up through a gentle alarm sound during the final stage. Through this, the user can achieve healthier sleep in a personalized sleep environment. However, depending on the user's needs, if the sleep target time is exceeded, the third sound source may play the included alarm sub-sound (SW). The alarm sub-sound (SW) is designed to induce the user's awakening and includes awakening frequencies such as beta waves to enable a smooth and natural wake-up.

[0074] However, the components of the aforementioned sub-sound sources may be modified at any time at the discretion of the designer. For example, the frequency range required for a specific sleep stage, whether or not pink noise is used, and the method of combination with the first sound source may be adjusted according to the characteristics and purpose of the user. In addition, the playback length and arrangement order of the sub-sound sources may be modified to suit the target sleep time and the requirements of each sleep stage.

[0076] FIG. 5 is a flowchart for explaining the first embodiment of generating a third sound source according to one embodiment of the present invention.

[0077] FIG. 5 can explain in detail the process of generating a third sound source according to an embodiment of the present invention. The generation of the third sound source is carried out based on the user's sleep target time and a combination of predetermined sub-sound sources, which corresponds to the detailed process of step (d) described in claim 3.

[0078] First, in the D100 stage, a repetition value is calculated as the quotient obtained by dividing the sleep target time by the sum of the playback times of the first intermediate sub-sound source (SM1) and the second intermediate sub-sound source (SM2). This repetition value can determine the number of repetitions for the subsequent sub-sound source combinations, and enables precise placement of the third sound source in accordance with the sleep target time. The repetition value plays a key role in ensuring the continuity of acoustic stimulation suitable for each sleep stage. This repetition value determines the number of repetitions of the sub-sound source to be repeatedly placed in the third sound source.

[0079] Next, in step D110, the Sleep Initiation Sub-source (SA) is placed at the forefront of the third source. This step is designed to provide the necessary acoustic stimulation during the initial stages of the user falling asleep.

[0080] Finally, in the D120 stage, a combination of the first intermediate sub-sound source (SM1) and the second intermediate sub-sound source (SM2) is sequentially placed behind the sleep initiation sub-sound source (SA) and repeated for a specified number of repetitions. This makes it possible to continuously provide appropriate acoustic stimulation during the target sleep time.

[0081] Specifically, the processor performs the following steps to generate a third sound source.

[0082] First, in step D100, a repeat value is calculated using the sleep target time and the playback time of the sub-sound source. The repeat value is calculated as the quotient obtained by dividing the sleep target time by the sum of the playback time of the first intermediate sub-sound source (SM1) and the playback time of the second intermediate sub-sound source (SM2). For example, if the sleep target time is 3600 seconds, the playback time of the first intermediate sub-sound source is 600 seconds, and the playback time of the second intermediate sub-sound source is 300 seconds, the repeat value can be calculated as follows.

[0083] Repeat Value = Target Sleep Time / (1st Intermediate Sub-track Playback Time + 2nd Intermediate Sub-track Playback Time)

[0084] For example, the repetition value could be = 3600 / (600 + 300) = 4.

[0085] This determines the number of times the sub-sound combination will be repeated during the target sleep time. In this step, to verify that the additionally calculated repetition value is appropriate, the processor makes adjustments to minimize the discrepancy between the target sleep time and the playback time of the sub-sound combination.

[0086] Second, in the D110 stage, a Sleep Initiation Sub-sound (SA) is placed at the forefront of the third sound source. The Sleep Initiation Sub-sound (SA) is a sound source with characteristics that induce relaxation and a sense of calm to create an environment suitable for the user to enter sleep. Through this, the user can effectively reach a sleep state during the initial sleep stage. For example, the Sleep Initiation Sub-sound includes frequencies composed primarily of alpha waves, which relieve physical tension and induce a stable psychological state.

[0087] Third, in step D120, a combination of sub-sound sources formed by sequentially combining the first intermediate sub-sound source (SM1) and the second intermediate sub-sound source (SM2) is repeatedly placed after the sleep start sub-sound source (SA). The number of repetitions is determined by the repetition value calculated in step D100. For example, if the repetition value is 4, the third sound source may be composed as follows.

[0088] SA + n × (SM1 + SM2)

[0089] Here, n is the repetition value calculated in step D100, which can be defined as sleep target time / (first intermediate sub-sound playback time + second intermediate sub-sound playback time). For example, it could be SA + (SM1 + SM2) + (SM1 + SM2) + (SM1 + SM2) + (SM1 + SM2).

[0090] The first intermediate sub-sound source (SM1) contains pink noise and frequencies designed for specific brainwave stimulation, and the second intermediate sub-sound source (SM2) also possesses similar brainwave stimulation characteristics. This arrangement provides appropriate acoustic stimulation for each sleep stage, helping the user maintain stable sleep. Additionally, optimization is performed to prevent unnatural gaps or overlaps at the connection points of the additionally placed sub-sound sources.

[0091] Of course, steps D100 to D120 are alternative embodiments, in which the sleep target time is divided into units of 90 minutes (the average value of a person's sleep cycle time and the length of each sub-sound source), which is the standard for the sleep brainwave timeline, and the remaining time outside the 90-minute units can be filled with SM3. The value divided by 90 minutes can be limited to a maximum of 8 (currently the sleep brainwave timeline is a maximum of 8 cycles), and individual files of sub-sound sources can be placed redundantly.

[0093] FIG. 6 is a flowchart for explaining a second embodiment of generating a third sound source according to one embodiment of the present invention.

[0094] It includes a step to configure a third sound source more precisely based on the combination of the sleep target time and the sub-sound source.

[0095] At this time, the processor can perform the following detailed steps.

[0096] First, in the D200 stage, the sleep target time ( ) is the first intermediate sub-sound source ( ) playback time and 2nd intermediate sub-sound source( The repeat value and remainder value are calculated by dividing by the sum of the playback times of ). Here, the repeat value represents the number of times the sub-sound combination is repeated in the third sound source, and the remainder value represents the time remaining after the repeat combination. These values ​​serve as key factors to ensure a precise match between the composition of the third sound source and the sleep target time. The repeat value represents the number of times (R) the sub-sound combination is repeated in the third sound source, and the remainder value (M) corresponds to the time remaining excluding the repeat combination. Mathematically, this can be expressed as follows.

[0098] [Mathematical Formula 1]

[0099] In this case, the remainder in the solution of the R operation is M.

[0100] For example, if the sleep target time is 3700 seconds, the playback time of SM1 is 600 seconds, and the playback time of SM2 is 300 seconds, the repetition value = 3700 / / (600 + 300) = 4 and the remainder value = 100.

[0101] Second, in the D210 stage, a sleep-initiating sub-sound source (SA) is placed at the forefront of the third sound source. The sleep-initiating sub-sound source (SA) is a sound source designed to help the user enter sleep and includes a frequency that induces a state of relaxation.

[0102] Third, in step D220, a combination of sub-sounds formed by combining the first intermediate sub-sound (SM1) and the second intermediate sub-sound (SM2) in sequence is repeatedly placed behind the sleep start sub-sound (SA) for a number of repetitions. After the repetition placement is completed, if a remaining value exists, it can be utilized to perform additional sub-sound placements. This process is configured to harmonize with the placement of the third intermediate sub-sound (SM3), which is described in step D230, to satisfy the total sleep target time. For example, if the repetition value is 4, it may be as follows.

[0103] SA + (SM1 + SM2) + (SM1 + SM2) + (SM1 + SM2) + (SM1 + SM2)

[0104] Fourth, in step D230, a third intermediate sub-sound source (SM3) is placed at the rear end of the third sound source. In this step, the length of the third intermediate sub-sound source (SM3) is adjusted to process the remaining value after the sub-sound source combination repeatedly placed in step D220. The playback time of SM3 is set according to the remaining value, thereby completing the configuration of the third sound source to satisfy the total sleep target time. In this step, the length of the third intermediate sub-sound source is adjusted based on the remaining value to satisfy the total sleep target time. The third intermediate sub-sound source (SM3) includes pink noise and specific brainwave stimulation and may have a length corresponding to the remaining value.

[0106] FIG. 7 is a diagram illustrating a method for generating a third sound source by considering a deep sleep mode and a nap mode according to an embodiment of the present invention. This diagram visually represents the process of setting a sleep target time and configuring the sound source accordingly, and specifically explains the detailed operation of the processor.

[0107] First, the processor provides an interface that allows the user to select either a nap mode or a deep sleep mode via the user terminal. If the user selects nap mode, the processor can be set to either 15 minutes or 30 minutes, and 15 minutes may be selected when nap mode is initially chosen. This setting is designed to provide effective rest within a short period of time. On the other hand, if deep sleep mode is selected, the processor proceeds with subsequent processes based on the sleep target time entered directly by the user.

[0108] Depending on the selected mode and sleep target time, the processor selects one of a plurality of second sound sources composed of a combination of multiple types of sub-sound sources that are predetermined. For example, in the case of a nap mode, a combination of sub-sound sources designed to help the user quickly reach a relaxed state within a short period of time is selected, and in the case of a deep sleep mode, a combination of sub-sound sources designed to induce stable sleep for a long period of time is selected.

[0109] The processor places a sleep start sub-sound source (SA) at the forefront based on the combination and sequence of sub-sound sources of the selected second sound source, and generates and configures a third sound source having a length corresponding to the sleep target time. At this time, the sub-sound sources of the third sound source may be composed of sub-sound sources with a length of approximately 90 minutes determined based on the sleep cycle.

[0110] In nap mode, the repeated placement of sub-sound sources is minimized to effectively utilize short sleep times, while in deep sleep mode, the repeated placement of sub-sound source combinations may be included to induce stable deep sleep.

[0111] Finally, the processor outputs the generated third sound source through the user terminal. Once the output of the third sound source is complete, an alarm sub-sound source (SW) for user awakening is subsequently output. In nap mode, a soft alarm sound source is used to induce natural awakening, and in deep sleep mode, a stronger stimulus is provided to help the user wake up clearly.

[0113] FIG. 8 is an illustrative diagram for explaining a UI according to an embodiment of the present invention.

[0114] FIG. 8 is an example for explaining a user interface (UI) according to an embodiment of the present invention, illustrating the configuration and operation of the UI to improve the user experience step by step from FIG. 8a to FIG. 8f. The UI is closely linked with the output process of the third sound source to provide real-time feedback to the user. For example, the visual representation of the alpha wave-based sound source output at the start of sleep in FIG. 8a is connected to the sleep start sub-sound source (SA) of the third sound source described in FIG. 4. Subsequently, the UI from FIG. 8b to FIG. 8e is linked with the step-by-step sub-sound source arrangement of FIG. 5 and FIG. 6, designed so that the user can obtain clear information about the current sleep stage. FIG. 8f visually represents the termination of the third sound source and the output status of the alarm sub-sound source (SW), and strengthens the organic connection with the final awakening stage described in FIG. 9. FIG. 8a represents the sleep stage in which the user enters sleep, and the UI clearly conveys the current state to the user by highlighting the remaining sleep time along with soft background graphics. In this stage, frequency information is set based on alpha waves (8Hz–13Hz) that induce a relaxed state, and the background graphics display gentle waveforms to provide a sense of relaxation.

[0115] Figure 8b indicates that the user has reached a light sleep state, and the UI provides text indicating that breathing and heart rate have stabilized. The background graphic for this stage includes a slow waveform at a speed similar to the breathing rate, and frequency information is conveyed to the user, centering on theta waves (4Hz–8Hz). The remaining sleep time is displayed as an updated value to help the user understand the current state.

[0116] Figure 8c illustrates a deep sleep state. The UI emphasizes that this is an important stage for physical recovery, and the background graphic transitions into a gentle, very slow waveform. During this stage, frequency information displays delta waves (0.5Hz to 4Hz), maximizing the user's psychological sense of calm along with information on remaining sleep time.

[0117] Figure 8d indicates that the user has entered a REM sleep state. The UI describes the dreaming state, which affects creativity and memory, in text, and the background graphics change into active waveforms. Frequency information is provided based on beta waves (13Hz–30Hz), highlighting the unique characteristics of this stage.

[0118] Figure 8e describes the state just before the user wakes up from sleep. The UI informs the user via text that there are only a few minutes left of sleep time, and the frequency gradually changes from alpha waves to beta waves to induce a gentle awakening of the user.

[0119] Figure 8f indicates that the user has transitioned to an awakened state. The UI provides the alarm music playback status as text, and at this stage, the frequency information is adjusted from alpha waves to beta waves in accordance with the alarm sub-sound source (SW), helping the user to clearly wake up.

[0120] The above description supports the fact that, as described in claim 6, when a user terminal outputs a third sound source, a UI including background graphics, frequency information, and remaining sleep time is output together. Additionally, the background graphics and frequency information of the UI vary according to the frequency of the third sound source currently being output, thereby enhancing the user experience.

[0122] FIG. 9 is a flowchart illustrating the entire process of a sleep music playback method based on a sleep brainwave timeline according to an embodiment of the present invention. This figure systematically illustrates the process of generating a third sound source in accordance with the sleep target time, taking into account the user's sleep state, and playing it to provide an optimal sleep environment.

[0123] First, the user device provides an initial step for setting the sleep target time. The device is configured to allow the user to select between Nap Mode and Deep Sleep Mode. If Nap Mode is selected, the sleep target time is automatically set to 15 minutes, which can be selected as 15 minutes, 30 minutes, or other times depending on the needs of the user or administrator. In Deep Sleep Mode, the target time entered directly by the user is reflected. This setting provides reference data for the sleep music playback process.

[0124] The processor acquires the sleep target time selected by the user and the first sound source. The first sound source may be a sound source stored in the system by default. This sound source constitutes the basic data for sleep music and is subsequently converted into an optimal combination of sub-sound sources through the operation of the processor.

[0125] In the next step, the processor selects one of a plurality of second sound sources composed of combinations of multiple types of predefined sub-sound sources based on the length of the target sleep time. The second sound sources consist of a sleep start sub-sound source (SA), a first intermediate sub-sound source (SM1), a second intermediate sub-sound source (SM2), a third intermediate sub-sound source (SM3), and an alarm sub-sound source (SW). Each sub-sound source includes a frequency for specific brainwave stimulation, which provides brainwave stimulation tailored to the user's sleep state. For example, the sleep start sub-sound source (SA) is based on alpha waves to relieve tension and aid in entering sleep, while the first intermediate sub-sound source (SM1) and the second intermediate sub-sound source (SM2) include theta and delta waves to induce stable deep sleep. Additionally, the length of the third intermediate sub-sound source (SM3) is adjusted according to the remaining sleep time, and the alarm sub-sound source (SW) is based on beta waves to aid the user's wakefulness.

[0126] Based on the selected second sound source, the processor generates and configures a third sound source. During this process, a repeat value and a remainder value are calculated. The repeat value is the quotient obtained by dividing the sleep target time by the sum of the playback times of the first and second intermediate sub-sound sources, and the remainder value is the remaining time. For example, if the sleep target time is 3600 seconds, the playback time of the first intermediate sub-sound source (SM1) is 600 seconds, and the playback time of the second intermediate sub-sound source (SM2) is 300 seconds, the repeat value becomes 3600 / (600+300) = 4, and the remainder value becomes 3600%(600+300) = 0. This value is directly reflected in the configuration of the third sound source.

[0127] The third sound source consists of the following stages. At the forefront, a sleep start sub-sound source (SA) is placed, which provides the user with a sense of relaxation to induce entry into sleep. Behind it, a combination of sub-sound sources (SM1 + SM2) is placed according to the repetition value. If a remainder value exists, a third intermediate sub-sound source (SM3) is placed behind it, and the playback time of this sub-sound source is adjusted according to the remainder value. At the end of the third sound source, an alarm sub-sound source (SW) is placed to support the user's awakening.

[0128] The generated third sound source is output through a user terminal, and a user interface (UI) is provided during the output process. The UI includes frequency information of the third sound source currently being output, remaining sleep time, and background graphics, which help the user visually understand their sleep state. For example, at the start of sleep, graphics and information based on alpha waves are provided, while during the deep sleep stage, stable background graphics reflecting delta waves are displayed. The UI is updated in real-time according to the output status of the third sound source, and the speed of the waveform increases as the user approaches the wakefulness stage.

[0129] Additionally, the second sound source can be configured by separating it into a left channel and a right channel. The left and right channels contain different sub-sound sources, and are designed so that the other channel complements the frequency output from a specific channel. For example, if alpha waves are output from the left channel, beta waves are placed in the right channel to balance the brainwaves. Furthermore, specific brainwaves, such as delta waves, can enhance sleep stability by being output in synchronization across both channels.

[0130] Finally, once the output of the third sound source is complete, the alarm sub-sound source (SW) is played. The alarm sub-sound source is designed differently depending on the nap mode and deep sleep mode. In nap mode, a gentle stimulus that gradually intensifies is used, while in deep sleep mode, a strong acoustic stimulus is provided for clearer awakening.

[0132] Meanwhile, in the embodiments related to the above left and right channels, the following embodiments may be considered.

[0133] In one embodiment, the left channel outputs a sleep-initiating sub-sound source (SA) containing alpha waves to induce a relaxed state at the beginning of sleep, and the right channel contains a low proportion of beta waves to compensate for wakefulness. For example, a soft wave sound is output from the left channel, and a faint nature whisper is additionally output from the right channel. This allows the user to relax and naturally enter sleep.

[0134] In one embodiment, the left channel may output a first intermediate sub-sound source including delta waves to induce deep sleep. The right channel outputs a mixture of delta waves and pink noise. For example, stable low-frequency vibrations are played on the left channel, while softly repeating white noise is output together on the right channel. Through this, physical recovery and stability during the deep sleep stage can be maximized by synchronized delta wave output from both channels.

[0135] Additionally, in one embodiment, the left channel outputs a second intermediate sub-sound source including theta waves to maintain a light sleep state, and the right channel outputs a mixture of theta waves and alpha waves. For example, a quiet wind sound is output from the left channel, and a faint wave sound is played together from the right channel. Through this, the user can maintain a stable state during the light sleep stage and be induced to transition to deep sleep without interruption.

[0136] Additionally, in one embodiment, the left channel outputs a sound source mixing theta and beta waves to induce REM sleep, while the right channel outputs a sound source based on beta waves. For example, a light bird sound is heard from the left channel, and a deep, soft heartbeat sound is output from the right channel. This stimulates creativity and memory during the REM sleep stage and helps maintain brainwave balance.

[0137] In addition, as an embodiment, a third intermediate sub-sound source containing the same delta wave is output for both the left channel and the right channel, wherein the left channel may be mixed with pink noise and the right channel may be mixed with blue noise. For example, the processor may output a sound similar to "the sound of a gently flowing river" or "a deep, low buzzing sound" by combining low frequency and pink noise in the left channel, and a clear and vivid sound with relatively emphasized high frequency components by mixing blue noise with delta waves.

[0138] Additionally, in one embodiment, the left channel outputs a sub-sound source for an alarm just before sleep ends and consists of a sound that gradually increases beta waves. The right channel contains the same beta waves, but the volume increase is adjusted more smoothly. For example, a gradually intensifying bell sound is output from the left channel, while a faint dawn bird sound is output from the right channel. This helps the user wake up smoothly and naturally.

[0139] In addition, in one embodiment, the left channel outputs a sound source that mixes alpha and theta waves in nap mode, while the right channel outputs the same sound source with added pink noise. For example, the sound of a slow river is output from the left channel, and the sound of leaves rustling in the wind is played from the right channel. This allows for the simultaneous provision of relaxation and recovery within a short period of time, thereby maximizing the effects of a nap.

[0140] Additionally, in one embodiment, in deep sleep mode, the left channel outputs a first intermediate sub-sound source including delta and theta waves, and the right channel outputs only delta waves. For example, a deep and continuous drone sound is output from the left channel, and a faintly resonating river vibration sound is played from the right channel. Through this, brainwaves can be stably maintained during the deep sleep stage, and an optimal state of physical recovery can be induced.

[0141] In addition, in one embodiment, the left channel outputs a sound source that gradually changes from alpha waves to delta waves to smooth the transition between sleep stages, and through this process, the user can experience a natural and continuous transition between sleep stages, and the right channel outputs a similar change from theta waves to delta waves. For example, a gradually subsiding wave sound is output from the left channel, and a gradually slowing natural heartbeat sound is heard from the right channel. This induces a natural transition between sleep stages and maintains the continuity of sleep.

[0142] In addition, in one embodiment, both the left and right channels output sub-sound sources for alarms, but the left channel emphasizes beta waves, while the right channel outputs a mixture of pink noise and alpha waves. For example, the sound of a clear dawn bell is played on the left channel, and the sound of soft water droplets is heard on the right channel. This promotes alertness while minimizing stress, thereby helping to ensure a pleasant wake-up.

[0144] The embodiments of the present invention are presented merely for illustrative purposes, and the full scope of the present invention is not limited to specific embodiments. In addition to the exemplified embodiments, the present invention is applicable in various technical fields and may be implemented, for example, as a medical device for treating sleep disorders, a personalized sleep management system, or a sleep assistance technology combined with a wearable device. Such modifications and extensions fall within the technical spirit and scope of the present invention and may be implemented in various ways within the scope of the claims. The present invention is capable of various modifications and variations based on the embodiments described above, and such modifications also fall within the technical spirit and scope of the present invention. Therefore, the present invention may be implemented in various ways within the scope described in the claims and is not limited to the embodiments presented in this specification, but allows for various applications.

Claims

Claim 1 A method for playing sleep music based on a sleep brainwave timeline performed by a processor, comprising: (a) a step in which the processor obtains a first sound source and a sleep target time from a user terminal; (b) a step in which the processor selects one of a plurality of second sound sources, each composed of a predetermined sequence of multiple types of sub-sound sources according to the length of the sleep target time; (c) a step in which the processor generates a third sound source having a length corresponding to the sleep target time and a sleep start sub-sound source (SA) placed at the forefront, based on the combination and sequence of sub-sound sources of the first sound source and the selected second sound source; and (d) a step in which the processor causes the user terminal to output the third sound source first, and when the output of the third sound source is completed, subsequently outputs an alarm sub-sound source (SW). Claim 2 A method according to claim 1, wherein the plurality of sub-sound sources comprises: a sleep start sub-sound source (SA); a first intermediate sub-sound source (SM1) combined with the first sound source and including a frequency for specific brainwave stimulation and pink noise (PN); a second intermediate sub-sound source (SM2) including a frequency for specific brainwave stimulation and pink noise (PN); a third intermediate sub-sound source (SM3) including pink noise (PN); and an alarm sub-sound source (SW). Claim 3 A method according to claim 2, wherein step (d) performed by the processor comprises: (d-1) calculating a repetition value which is the quotient of dividing the sleep target time by the playback time of the first intermediate sub-sound source (SM1) + the playback time of the second intermediate sub-sound source (SM2); (d-2) placing the sleep start sub-sound source (SA) at the forefront of the third sound source; and (d-3) placing the first intermediate sub-sound source (SM1) and the second intermediate sub-sound source (SM2) at the rear of the sleep start sub-sound source (SA) in the third sound source repeatedly by the repetition value. Claim 4 In claim 2, the step (d) performed by the processor comprises: (d-1) calculating a repeat value and a remainder value which is the quotient of dividing the sleep target time by the sum of the playback time of the first intermediate sub-sound source (SM1) and the playback time of the second intermediate sub-sound source (SM2); (d-2) placing the sleep start sub-sound source (SA) at the forefront of the third sound source; (d-3) placing the first intermediate sub-sound source (SM1) and the second intermediate sub-sound source (SM2) at the rear of the sleep start sub-sound source (SA) at the third sound source repeatedly by the repeat value; and (d-4) placing the third intermediate sub-sound source (SM3) at the rearmost position of the third sound source and adjusting the length of the third intermediate sub-sound source (SM3) based on the remainder value. Claim 5 A method according to claim 2, wherein the frequency for the specific brainwave stimulation is composed of at least one repeatable and sequential combination of alpha waves that induce a relaxed state during sleep, theta waves that induce REM sleep, delta waves that induce deep sleep, and beta waves that induce wakefulness and REM sleep. Claim 6 A method according to claim 5, wherein when the user terminal outputs the third sound source, the processor outputs a UI including background graphics; frequency information; and remaining sleep time information to the user terminal together with the third sound source, and the UI is characterized in that the shape of the background graphics and the frequency information change according to the frequency of the third sound source currently being output. Claim 7 A method according to claim 5, characterized in that the sleep start sub-sound source (SA) has the highest proportion of alpha waves, and the alarm sub-sound source (SW) has the highest proportion of beta waves. Claim 8 A sleep music playback device based on a sleep brainwave timeline, wherein the device comprises a processor, memory, and a network, and the processor is configured to perform: (a) an operation of acquiring a first sound source and a sleep target time from a user terminal; (b) an operation of selecting one of a plurality of second sound sources, each composed of a sequenced combination of a plurality of predetermined types of sub-sound sources according to the length of the sleep target time; (c) an operation of generating a third sound source having a length corresponding to the sleep target time and having a sleep start sub-sound source (SA) placed at the forefront, based on the combination and sequence of sub-sound sources of the first sound source and the selected second sound source; and (d) an operation of causing the user terminal to output the third sound source first, and then output an alarm sub-sound source (SW) after the output of the third sound source is completed.

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