Earphone system, earphone box, earphone and control method thereof

Abstract

The application discloses an earphone system, an earphone box, an earphone and a control method thereof. The earphone system comprises an earphone box, a microphone and a first control chip. The microphone is used for acquiring environmental sound information, and the first control chip is used for calculating an environmental volume according to the environmental sound information. The earphone is wirelessly connected with the earphone box, and is used for adjusting a current playing volume when the environmental volume is less than or equal to a preset volume threshold, or is used for carrying out noise reduction when the environmental volume is greater than the preset volume threshold. According to the earphone system, the earphone box, the earphone and the control method thereof, the hearing experience of a user can be effectively improved, a microphone does not need to be arranged on the earphone, the volume and the weight of the earphone can be reduced, and the endurance of the earphone is improved.

Description

Technical Field

[0001] This application relates to the field of electronic device technology, and more specifically to an earphone system, earphone case, earphones, and control method thereof. Background Technology

[0002] Conventional sleep aid headphones typically play music at a fixed volume set by the user (e.g., sleep-inducing music). They cannot adaptively adjust the volume according to ambient noise levels. Therefore, in noisy environments, users will hear loud noise instead of sleep-inducing music. Furthermore, due to limitations in size, weight, battery capacity, and the need for long battery life, sleep aid headphones cannot easily incorporate microphones to collect ambient noise and maintain noise cancellation for extended periods.

[0003] Therefore, improvements are needed to address the aforementioned issues. Summary of the Invention

[0004] This application provides a headphone system, headphone case, headphones, and control method thereof, which can solve the technical problem of poor listening experience of conventional headphones when there is a lot of ambient noise.

[0005] According to a first aspect of the present invention, a headphone system is provided, comprising:

[0006] The earphone case includes a microphone and a first control chip. The microphone is used to acquire ambient sound information, and the first control chip is used to calculate the ambient volume based on the ambient sound information.

[0007] The earphones are wirelessly connected to the earphone case and are used to adjust the current playback volume when the ambient volume is less than or equal to a preset volume threshold, or to perform noise reduction when the ambient volume is greater than the preset volume threshold.

[0008] For example, the headphones include a second control chip and a speaker;

[0009] The second control chip is used to receive the ambient volume, and when the ambient volume is less than or equal to a preset volume threshold, to determine the target playback volume according to the preset volume range to which the ambient volume belongs, with each preset volume range corresponding to a target playback volume;

[0010] The speaker is used to adjust the current playback volume to the target playback volume;

[0011] or,

[0012] The first control chip is used to send the raw data of the ambient sound information to the headphones when the ambient volume is greater than the preset volume threshold and the duration of the ambient volume being greater than the preset volume threshold exceeds a preset time threshold;

[0013] The second control chip is used to receive the raw data of the ambient sound information and to invert the raw data of the ambient sound information to obtain an inverted sound information.

[0014] The speaker is used to play the inverted sound information for noise reduction.

[0015] According to a second aspect of the present invention, an earphone case is provided, comprising:

[0016] A microphone, used to acquire ambient sound information;

[0017] A first control chip is configured to calculate the ambient volume based on the ambient sound information and send the ambient volume to the earphones wirelessly connected to the earphone box, so that the earphones can adjust the current playback volume when the ambient volume is less than or equal to a preset volume threshold, or perform noise reduction when the ambient volume is greater than the preset volume threshold.

[0018] According to a third aspect of the present invention, an earphone is provided, which includes a second control chip and a speaker;

[0019] The second control chip is used to receive the ambient volume sent by the earphone box which is wirelessly connected to the earphone, and adjust the current playback volume of the speaker when the ambient volume is less than or equal to a preset volume threshold, or to perform noise reduction when the ambient volume is greater than the preset volume threshold.

[0020] For example, the second control chip is used to determine the target playback volume according to the preset volume range to which the ambient volume belongs when the ambient volume is less than or equal to a preset volume threshold, and each preset volume range corresponds to a target playback volume;

[0021] The speaker is used to adjust the current playback volume to the target playback volume; or...

[0022] The second control chip is used to receive the raw data of the ambient sound information sent by the earphone box, and to invert the raw data of the ambient sound information to obtain an inverted sound information.

[0023] The speaker is used to play the inverted sound information for noise reduction.

[0024] According to a fourth aspect of the present invention, a control method for an earphone system is provided, the control method being based on an earphone and an earphone case connected by wireless communication, comprising the following steps:

[0025] Ambient sound information is acquired through the earphone box;

[0026] Calculate the ambient volume based on the ambient sound information, and determine the relationship between the ambient volume and a preset volume threshold.

[0027] When the ambient volume is less than or equal to the preset volume threshold, the current playback volume of the headphones is adjusted according to the ambient volume; or, when the ambient volume is greater than the preset volume threshold, noise reduction is performed according to the ambient sound information.

[0028] According to a fifth aspect of the present invention, a method for controlling an earphone case is provided, comprising the following steps:

[0029] Acquire ambient sound information;

[0030] Calculate the ambient volume based on the ambient sound information;

[0031] The ambient volume is sent to the earphones wirelessly connected to the earphone box, so that the earphones adjust the current playback volume when the ambient volume is less than or equal to a preset volume threshold, or perform noise reduction when the ambient volume is greater than the preset volume threshold.

[0032] For example, calculating the ambient volume based on the ambient sound information includes:

[0033] Calculate the ambient volume in decibels based on the ambient sound information;

[0034] Calculate the average value of the ambient volume in decibels within a preset time period, where the average value is the ambient volume.

[0035] According to a sixth aspect of the present invention, a method for controlling headphones is provided, comprising the following steps:

[0036] The system receives ambient volume data sent by the earphone box, which is wirelessly connected to the earphones. The ambient volume data is calculated by the earphone box based on ambient sound information.

[0037] Determine the relationship between the ambient volume and the preset volume threshold;

[0038] When the ambient volume is less than or equal to the preset volume threshold, the current playback volume of the headphones is adjusted according to the ambient volume; or, when the ambient volume is greater than the preset volume threshold, noise reduction is performed based on the original data of the ambient sound information.

[0039] For example, adjusting the current playback volume of the headphones according to the ambient volume includes:

[0040] Determine the preset volume range to which the ambient volume belongs, where each preset volume range corresponds to a target playback volume, and determine the target playback volume based on the preset volume range to which the ambient volume belongs;

[0041] Adjust the current playback volume of the headphones to the target playback volume at a preset adjustment rate.

[0042] For example, the noise reduction based on the ambient sound information includes:

[0043] Determine whether the duration for which the ambient volume is greater than the preset volume threshold exceeds a first preset time threshold;

[0044] When the determination is yes, the original data of the ambient sound information sent by the earphone box is received, and the original data of the ambient sound information is inverted to obtain an inverted sound information.

[0045] Play the inverted audio information for noise reduction.

[0046] According to the headphone system, headphone case, headphones and control method of this application, the headphone case acquires ambient sound information and adjusts the current playback volume of the headphones and / or performs noise reduction accordingly. This allows the volume of music played by the headphones to be adjusted according to the volume of ambient noise, improving the user's listening experience. Furthermore, it eliminates the need for a microphone on the headphones, reducing their size and weight and improving their battery life. Attached Figure Description

[0047] The following drawings, which are incorporated herein by reference and are used to understand this application, illustrate embodiments of the invention and their descriptions, thereby explaining the apparatus and principles of the invention. In the drawings,

[0048] Figure 1 A schematic block diagram of a headphone system according to an embodiment of this application is shown;

[0049] Figure 2 A schematic diagram showing the correspondence between a preset volume range and a target playback volume in one embodiment of this application is illustrated.

[0050] Figure 3 This illustration shows a schematic diagram of the relationship between ambient volume and the current playback volume of the headphones under different sleep states, according to an embodiment of this application.

[0051] Figure 4 A schematic flowchart of a control method for an earphone system according to an embodiment of this application is shown.

[0052] Explanation of reference numerals in the attached figures:

[0053] 100 - Earphone case, 110 - Microphone, 120 - First control chip, 200 - Earphone, 210 - Second control chip, 220 - Speaker. Detailed Implementation

[0054] The following description provides numerous specific details to offer a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with this application.

[0055] It should be understood that this application can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of this application to those skilled in the art.

[0056] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0057] To fully understand this invention, detailed structures and steps will be presented in the following description to illustrate the technical solution proposed by this invention. Preferred embodiments of the invention are described in detail below; however, in addition to these detailed descriptions, the invention may have other embodiments.

[0058] To at least partially resolve the aforementioned technical problems, see Appendix Figure 1 According to a first aspect of this application, an earphone system is provided. The earphone system includes an earphone case 100 and earphones 200. The earphone case 100 includes a microphone 110 and a first control chip 120. The microphone 110 is used to acquire ambient sound information, and the first control chip 120 is used to calculate the ambient volume based on the ambient sound information. The earphones 200 are wirelessly connected to the earphone case 100 and are used to adjust the current playback volume when the ambient volume is less than or equal to a preset volume threshold, or to perform noise reduction when the ambient volume is greater than the preset volume threshold.

[0059] Specifically, the earphone case 100 is used to accommodate the earphones 200, and has a space for accommodating the earphones 200. The earphone case 100 contains a microphone 110 and a first control chip 120 that are interconnected. The microphone 110 can acquire ambient sound information in real time. In this embodiment, only one microphone 110 is provided; in other embodiments, multiple microphones 110 may be provided, distributed in different locations within the earphone case 100. The first control chip 120 may include a processor, memory, a communication module (e.g., a Bluetooth communication module), and corresponding peripheral circuits. It can process the ambient sound information acquired by the microphone 110 and send the processed ambient sound information and / or the raw data of the ambient sound information acquired by the microphone 110 to the earphones 200. In this embodiment, the first control chip 120 is a Bluetooth chip, for example, a Bluetooth SoC (System on Chip) chip. In some other embodiments, the first control chip 120 may include multiple chips, such as an audio processing chip and a Bluetooth communication chip. The audio processing chip is used to process the ambient sound information acquired by the microphone 110, and the Bluetooth communication chip is used to send the processed ambient sound information and / or the ambient sound information acquired by the microphone 110 to the earphone 200. In this embodiment, the earphone case 100 also includes a charging interface, a battery, a power supply interface, and a charging control circuit. The charging control circuit is used to receive external power through the charging interface to charge the battery, and to charge the earphone 200 through the battery when the earphone 200 is housed in the earphone case 100 and the charging interface on the earphone 200 is connected to the power supply interface on the earphone case 100. This charging control circuit may be included in the aforementioned Bluetooth chip, or it may be implemented by a separate chip. Accordingly, the earphone case 100 may also be referred to as an earphone charging case or an earphone charging cradle.

[0060] The earphone 200 is wirelessly connected to the earphone case 100. The earphone 200 includes a second control chip 210 and a speaker 220. The second control chip 210 includes a processor, memory, a communication module (e.g., a Bluetooth communication module), and corresponding peripheral circuits. The second control chip 210 can receive processed ambient sound information and / or raw data of ambient sound information from the first control chip 120, and adjust the current playback volume of the speaker 220 and / or perform noise reduction processing based on the received information and / or data. Specifically, the second control chip 210 can adjust the current playback volume when the ambient volume is less than or equal to a preset volume threshold, or perform noise reduction when the ambient volume is greater than the preset volume threshold. In this embodiment, the second control chip 210 is a Bluetooth chip, preferably a Bluetooth SoC (System on Chip) chip. In this embodiment, the earphone 200 and the earphone case 100, i.e., the first control chip 120 and the second control chip 210, are wirelessly connected via Bluetooth. In other embodiments, the second control chip 210 may include multiple chips, such as a Bluetooth communication chip and an audio processing chip. The Bluetooth communication chip is used to receive information sent by the first control chip 120, and the audio processing chip is used to process the information sent by the first control chip 120 and adjust the playback volume of the speaker 220 accordingly or perform noise reduction processing. In this embodiment, the earphone 200 is an in-ear TWS (True Wireless Stereo) Bluetooth earphone. In some embodiments, the earphone 200 is a sleep aid earphone. The content played by the earphone 200 may be audio information stored in the earphone 200, or audio information obtained by the earphone 200 from a smart terminal (such as a smartphone, smartwatch, or smart wearable device) connected to it via Bluetooth.

[0061] In this embodiment, the first control chip 120 can be used to calculate the ambient volume based on the ambient sound information acquired by the microphone 110 and send the ambient volume to the headset 200. Specifically, the microphone 110 collects ambient sound information and sends it to the first control chip 120. The first control chip 120 performs a Fast Fourier Transform (FFT) and A-weighted calculation on the ambient sound information collected by the microphone 110 to obtain the volume decibel value of the ambient sound. Then, it calculates the average volume decibel value of the ambient sound within a preset time period (e.g., 10 seconds or other suitable time periods). This average value is the ambient volume. The first control chip 120 sends the ambient volume to the headset 200 via Bluetooth Low Energy (BLE). That is, the first control chip 120 sends an ambient volume value to the headset 200 every preset time period (e.g., 10 seconds or other suitable time periods). The second control chip 210 in the headset 200 receives the ambient volume and determines the relationship between the ambient volume and a preset volume threshold. When the ambient volume is less than or equal to a preset volume threshold, the current playback volume of the headphones is adjusted according to the ambient volume. Specifically, when the ambient volume is less than or equal to the preset volume threshold, the preset volume range to which the ambient volume belongs is determined. Each preset volume range corresponds to a target playback volume, and the target playback volume is determined according to the preset volume range to which the ambient volume belongs.

[0062] Specifically, see Appendix Figure 2 , Figure 2 This illustration shows the correspondence between preset volume ranges and target playback volumes in one embodiment of this application. There are four preset volume ranges for ambient volume: 0-20 dBA, 20-40 dBA, 40-60 dBA, and 60-70 dBA. These four preset volume ranges correspond to the first to fourth target playback volumes, respectively. When the ambient volume is less than or equal to a preset volume threshold of 70 dBA, the second control chip 210 in the earphone 200 determines the preset volume range to which the ambient volume belongs. Based on the correspondence between the preset volume ranges and target playback volumes, it determines the target playback volume. For example, when the ambient volume is 50 dBA, it belongs to the 40-60 dBA preset volume range, and its corresponding target playback volume is the third target playback volume. When the ambient volume is greater than the preset volume threshold of 70 dBA, the target playback volume is controlled to be the fourth target playback volume.

[0063] It should be noted that, Figure 2The number, range, and corresponding target playback volume of the preset volume intervals shown in the embodiments are merely examples and are not intended to limit this application. Those skilled in the art can flexibly set them according to design requirements. In some embodiments, after receiving the ambient volume, the second control chip 210 in the headphones 200 may not determine the relationship between the ambient volume and the preset volume threshold, but directly determine the target playback volume based on the preset volume interval to which the ambient volume belongs. For example, four preset volume intervals can be set: 0-20dBA, 20-40dBA, 40-60dBA, and 60-+∞dBA. These four preset volume intervals correspond to the first to fourth target playback volumes, respectively. The target playback volume is then determined by directly determining which interval the ambient volume belongs to. After determining the target playback volume corresponding to the ambient volume, the second control chip 210 in the headphones 200 generates a corresponding control command (e.g., a specific current signal) and sends it to the speaker 220. The speaker 220 adjusts the current playback volume to the target playback volume according to the control command.

[0064] The technical solution of this embodiment allows the headphones to adaptively adjust their playback volume based on ambient sound (such as ambient noise) collected by the headphone case. For example, when ambient noise increases, the playback volume can be adaptively increased, allowing the user to clearly hear the content played by the headphones in noisy environments, thus improving the user's auditory experience. Therefore, the headphones of this embodiment can be used as sleep aid headphones. Compared to conventional sleep aid headphones that play sleep music at a fixed volume, the headphone system of this embodiment can adaptively adjust the volume of the sleep music played by the headphones according to the level of ambient noise, without requiring manual operation by the user. This avoids the ambient noise drowning out the sleep music volume and affecting the user's sleep, allowing the user to hear the sleep music and thus achieving a better sleep-aiding effect.

[0065] In some embodiments, the first control chip 120 calculates the ambient volume based on the ambient sound information acquired by the microphone 110, and determines the preset volume range to which the ambient volume belongs, either directly or when the ambient volume is less than or equal to a preset volume threshold. Each preset volume range corresponds to a target playback volume, and the target playback volume is determined based on the preset volume range to which the ambient volume belongs. The specific methods for calculating the ambient volume and determining the target playback volume are the same as in the above embodiments, and will not be repeated here. The difference is that the steps of calculating the ambient volume and determining the target playback volume are completed in the first control chip 120. After determining the target playback volume, the first control chip 120 generates a corresponding control signal and sends it to the second control chip 210. The second control chip 210 receives the control signal and accordingly controls the speaker 220 to adjust the current playback volume to the target playback volume.

[0066] In some embodiments, the first control chip 120 calculates the ambient volume based on the ambient sound information acquired by the microphone 110, and then determines whether the ambient volume meets a first preset condition. This first preset condition is that the ambient volume is greater than a preset volume threshold (e.g., 70 dBA or other suitable volume threshold), and the duration of the ambient volume exceeding the preset volume threshold exceeds a first preset time threshold (e.g., 2 minutes or other suitable time threshold). In other embodiments, the first preset condition may simply be that the ambient volume is greater than the preset volume threshold. When the ambient volume meets the first preset condition, the first control chip 120 establishes a classic Bluetooth connection (i.e., a classic Bluetooth A2DP connection) with the headset 200 (i.e., the second control chip 210 in the headset 200), and sends the raw data of the ambient sound information, i.e., the raw PCM (Pulse Code Modulation) audio data, to the headset 200 via classic Bluetooth. The raw PCM audio data is an uncompressed audio sample data stream, which is standard digital audio data converted from analog signals through sampling, quantization, and encoding. The second control chip 210 in the earphone 200 receives the raw data of the ambient sound information and performs phase inversion processing on the raw data of the ambient sound information to obtain an inverted sound information. The inverted sound information is the sound information with the same amplitude but opposite phase as the ambient sound information. The second control chip 210 plays the inverted sound information through the speaker 220 to generate an anti-noise wave with the same amplitude but opposite phase as the ambient sound (ambient noise). The anti-noise wave interferes with and cancels out the ambient sound (ambient noise) entering the ear, thereby achieving noise reduction.

[0067] The first control chip 120 also determines whether the ambient volume meets a second preset condition. The second preset condition is that the ambient volume is less than or equal to a preset volume threshold, and the duration of the ambient volume being less than or equal to the preset volume threshold exceeds a second preset time threshold. The second preset time threshold can be the same as or different from the first preset time threshold. In some other embodiments, the second preset condition may simply be that the ambient volume is less than the preset volume threshold. When the ambient volume meets the second preset condition, noise reduction is stopped (i.e., the first control chip 120 stops sending the raw data of ambient sound information to the earphone 200) and the classic Bluetooth connection used to transmit the raw data of ambient sound information between the earphone 200 and the earphone case 100 is disconnected. In this embodiment, the earphone can perform noise reduction processing based on the ambient sound (such as ambient noise) collected by the earphone case when the ambient sound meets the set requirements, thereby allowing the user to clearly hear the content played by the earphone in a noisy environment, improving the user's auditory experience. Furthermore, this embodiment eliminates the need for a microphone on the earphone for noise reduction, effectively reducing the size and weight of the earphone and improving its battery life. Therefore, the earphone in this embodiment can be used as a sleep aid earphone. Compared to conventional sleep aid headphones, the headphone system in this example actively cancels noise when the ambient noise level exceeds a threshold, using ambient sound information collected by the headphone case. On the one hand, active noise cancellation can more effectively reduce ambient noise in noisy environments, allowing users to still hear the sleep aid music clearly, thus achieving a better sleep-aiding effect. On the other hand, the elimination of the need for a microphone on the headphones effectively reduces their size and weight, improves battery life, and makes them lighter and more comfortable to wear. Users will experience a better, more unnoticeable sleep experience, and the longer battery life allows the sleep aid music to play for a longer period until the user falls asleep.

[0068] In some embodiments, the first control chip 120 calculates the ambient volume based on the ambient sound information acquired by the microphone 110, and then determines whether the ambient volume meets a first preset condition. This first preset condition is that the ambient volume is greater than a preset volume threshold (e.g., 70 dBA or other suitable volume threshold), and the duration of the ambient volume exceeding the preset volume threshold exceeds a first preset time threshold (e.g., 2 minutes or other suitable time threshold). When the ambient volume meets the first preset condition, the first control chip 120 performs phase inversion processing on the raw data of the ambient sound information to obtain phase-inverted sound information. This phase-inverted sound information is sound information with the same amplitude but opposite phase to the ambient sound information. It then establishes a classic Bluetooth connection (i.e., a classic Bluetooth A2DP connection) with the headset 200 and sends the phase-inverted sound information to the headset 200 via this connection. The second control chip 210 in the headset 200 receives the phase-inverted sound information and plays it through the speaker 220, generating an anti-noise wave with the same amplitude but opposite phase to the ambient sound (ambient noise). This anti-noise wave interferes with and cancels out the ambient sound (ambient noise) entering the ear, thereby achieving noise reduction. The first control chip 120 also determines whether the ambient volume meets a second preset condition. The second preset condition is that the ambient volume is less than or equal to a preset volume threshold, and the duration of the ambient volume being less than or equal to the preset volume threshold exceeds a second preset time threshold. The second preset time threshold can be the same as or different from the first preset time threshold. When the ambient volume meets the second preset condition, noise reduction is stopped (i.e., the first control chip 120 stops inverting the original data of the ambient sound information) and the classic Bluetooth connection used to transmit inverted sound information between the earphone 200 and the earphone case 100 is disconnected.

[0069] In some embodiments, the first control chip 120 acquires ambient sound information through the microphone 110, and then, without calculating the ambient volume, directly sends the raw data of the ambient sound information, i.e., the raw PCM audio data, to the headset 200 via classic Bluetooth. The second control chip 210 in the headset 200 receives the raw data of the ambient sound information, performs phase inversion processing on the raw data of the ambient sound information to obtain inverted sound information, and plays the inverted sound information through the speaker 220 for real-time noise reduction. Alternatively, in some embodiments, the first control chip 120 acquires ambient sound information through the microphone 110, and then, without calculating the ambient volume, directly performs phase inversion processing on the raw data of the ambient sound information to obtain inverted sound information, and then sends the inverted sound information to the headset 200 via classic Bluetooth. The second control chip 210 in the headset 200 receives the inverted sound information and plays the inverted sound information through the speaker 220 for real-time noise reduction.

[0070] In some embodiments, the headphones 200 further include a sleep state monitoring sensor connected to a second control chip 210. The second control chip 210 determines the current sleep state of the headphone wearer based on information acquired by the sleep state monitoring sensor. In some embodiments, the sleep state monitoring sensor may be a heart rate sensor, and the second control chip 210 determines the current sleep state of the headphone wearer based on heart rate information acquired by the heart rate sensor. When the sleep state is a preset sleep state and the ambient volume is less than or equal to a preset volume threshold, the current playback volume of the headphones 200 is adjusted according to the ambient volume; or, when the sleep state is a preset sleep state and the ambient volume is greater than the preset volume threshold, noise reduction is performed based on ambient sound information. The specific methods for adjusting the current playback volume of the headphones 200 based on ambient volume and for performing noise reduction based on ambient sound information have been described in detail in the above embodiments and will not be repeated here. The preset sleep state may be a non-sleep state and / or a light sleep state.

[0071] See appendix Figure 3 The diagram illustrates the relationship between ambient volume and the current playback volume of headphones 200 under different sleep states in one embodiment. As shown in the diagram, during light sleep, the current playback volume of headphones 200 increases or decreases accordingly when the ambient volume increases or decreases. It is important to note that when the ambient volume increases or decreases, the current playback volume of headphones 200 is not instantly changed to a target playback volume corresponding to the ambient volume. Instead, the current playback volume is gradually adjusted to the target playback volume at a preset adjustment rate (e.g., 4 dBA / s or other suitable rate). This preset adjustment rate can be determined by those skilled in the art through extensive experimentation. This relatively slow increase or decrease in the current playback volume to the target playback volume improves user perception and avoids harshness. In some embodiments, the preset adjustment rate for gradually increasing the current playback volume to the target playback volume and the preset adjustment rate for gradually decreasing the current playback volume to the target playback volume can be different. In some embodiments, when the difference between the target playback volume and the current playback volume is large, the current playback volume can be gradually adjusted to the target playback volume at a first preset adjustment rate; when the difference between the target playback volume and the current playback volume is small, the current playback volume can be gradually adjusted to the target playback volume at a second preset adjustment rate lower than the first preset adjustment rate (e.g., half of the first preset adjustment rate or other suitable rate). When the headphone wearer is in deep sleep, the current playback volume is gradually adjusted to 0 at a certain rate (e.g., 4 dBA / s or lower) to avoid the headphones 200 continuously playing music during the user's deep sleep, which could damage the user's hearing.

[0072] In other embodiments, the earphones 200 and the earphone case 100 can also connect and transmit data via wireless communication methods such as Wi-Fi and ZigBee. This allows the earphones 200 to adjust their current playback volume based on the ambient sound information obtained from the earphone case, or to perform noise reduction based on the ambient sound information obtained from the earphone case. This can be achieved simply by replacing the Bluetooth communication modules in the first control chip 120 and the second control chip 210 with corresponding wireless communication modules.

[0073] According to a second aspect of this application, an earphone case 100 as described above is also provided. The earphone case 100 includes a microphone 110 and a first control chip 120. The microphone 110 is used to acquire ambient sound information. The first control chip 120 is connected to the microphone 110 and is used to calculate the ambient volume based on the ambient sound information, and send the ambient volume to an earphone 200 wirelessly connected to the earphone case 100, so that the earphone 200 adjusts the current playback volume when the ambient volume is less than or equal to a preset volume threshold, or performs noise reduction when the ambient volume is greater than the preset volume threshold. The first control chip 120 is used to send raw data of the ambient sound information to the earphone, so that the earphone 200 generates and plays inverse sound information based on the raw data of the ambient sound information for noise reduction. The first control chip 120 may include a Bluetooth chip, which can send the ambient volume to the earphone 200 via Bluetooth Low Energy; or, send the raw data of the ambient sound information to the earphone 200 via Bluetooth Classic.

[0074] According to a third aspect of this application, an earphone 200 as described above is also provided. The earphone 200 includes a second control chip 210 and a speaker 220. The second control chip 210 is used to receive ambient volume data sent by an earphone case 100 wirelessly connected to the earphone 200, and determine the relationship between the ambient volume and a preset volume threshold. When the ambient volume is less than or equal to the preset volume threshold, the second control chip 210 adjusts the current playback volume of the speaker 220; or, when the ambient volume is greater than the preset volume threshold, noise reduction is performed. Specifically, when the ambient volume is less than or equal to the preset volume threshold, the second control chip 210 determines a target playback volume based on a preset volume range to which the ambient volume belongs, with each preset volume range corresponding to a target playback volume. After determining the target volume, the speaker 220 adjusts its current playback volume to the target playback volume. When the ambient volume is greater than the preset volume threshold, the second control chip 210 receives raw data of ambient sound information sent by the earphone case 100, and performs phase inversion processing on the raw data of the ambient sound information to obtain inverted sound information. The speaker 220 plays this inverted sound information for noise reduction. The second control chip 210 includes a Bluetooth chip, which receives ambient volume data sent by the headphone box 100 via Bluetooth Low Energy; or receives raw data of ambient sound information sent by the headphone box 100 via Bluetooth Classic.

[0075] See appendix Figure 4 According to a fourth aspect of this application, a control method for the aforementioned headphone system is provided. The control method includes the following steps:

[0076] S100: Acquires ambient sound information through the earphone case 100.

[0077] Specifically, ambient sound information is collected through the microphone 110 set on the earphone box 100.

[0078] S200: Calculate the ambient volume based on ambient sound information and determine the relationship between the ambient volume and the preset volume threshold.

[0079] Specifically, in step S200, the ambient volume in decibels is first calculated based on the ambient sound information collected by the microphone 110. For example, the ambient volume in decibels is calculated using Fast Fourier Transform (FFT) and A-weighted average. Then, the average ambient volume in decibels over a preset time period (e.g., 10 seconds) is calculated, and this average value is the ambient volume. The relationship between the ambient volume and a preset volume threshold is then determined. Step S210 is performed within the first control chip 120 in the headphone case 100.

[0080] S300: When the ambient volume is less than or equal to the preset volume threshold, adjust the current playback volume of the headphones 200 according to the ambient volume.

[0081] In some embodiments, step S300 specifically includes:

[0082] S310: Determine the preset volume range to which the ambient volume belongs. Each preset volume range corresponds to a target playback volume. Determine the target playback volume based on the preset volume range to which the ambient volume belongs.

[0083] In step S310, the first control chip 120 in the earphone case 100 sends the ambient volume to the second control chip 210 in the earphone 200 via Bluetooth Low Energy. The second control chip 210 stores a correspondence between preset volume ranges and target playback volumes, with each preset volume range corresponding to a target playback volume. The second control chip 210 determines which preset volume range the ambient volume belongs to, and then determines the target playback volume corresponding to the ambient volume based on the correspondence between the preset volume range and the target playback volume. The second control chip 210 generates a corresponding control signal based on the determined target playback volume and sends it to the speaker 220.

[0084] S311: Adjust the current playback volume of the headphones 200 to the target playback volume.

[0085] In step S311, the speaker 220 adjusts the current playback volume to the determined target playback volume according to the control signal.

[0086] In other embodiments, step S300 specifically includes:

[0087] S320: Determine the preset volume range to which the ambient volume belongs. Each preset volume range corresponds to a target playback volume. Determine the target playback volume based on the preset volume range to which the ambient volume belongs.

[0088] In step S320, the first control chip 120 in the earphone case 100 stores a correspondence between preset volume ranges and target playback volumes, with each preset volume range corresponding to a target playback volume. The first control chip 120 determines which preset volume range the ambient volume belongs to, and then determines the target playback volume corresponding to the ambient volume based on the correspondence between the preset volume range and the target playback volume. The first control chip 120 generates a control signal based on the determined target playback volume and sends it to the second control chip 210 via Bluetooth Low Energy.

[0089] S321: Adjust the current playback volume of the headphones 200 to the target playback volume.

[0090] In step S321, the second control chip 210 controls the speaker 220 to adjust the current playback volume to the determined target playback volume according to the control signal sent by the first control chip 120.

[0091] It should be noted that during the process of adjusting the current playback volume of the speaker 220 to the target playback volume, the current playback volume is not changed instantly to the target playback volume. Instead, the current playback volume of the headphones 200 is gradually adjusted to the target playback volume at a preset adjustment rate (e.g., 4dBA / s or other suitable rate). This preset adjustment rate can be determined by those skilled in the art through a large number of experiments. By raising or lowering the current playback volume to the target playback volume relatively slowly in this way, the user's perception can be better and harshness can be avoided.

[0092] S400: When the ambient volume is greater than the preset volume threshold, noise reduction is performed based on the ambient sound information.

[0093] In some embodiments, step S400 specifically includes:

[0094] S410: Determine whether the duration for which the ambient volume is greater than a preset volume threshold exceeds a preset time threshold;

[0095] S411: When the determination is yes, the original data of the environmental sound information is inverted to obtain an inverted sound information;

[0096] In some embodiments, in step S411, when the second control chip 210 determines that the duration for which the ambient volume is greater than a preset volume threshold exceeds a first preset time threshold (e.g., 2 minutes or other suitable time threshold), the second control chip 210 establishes a classic Bluetooth connection (i.e., a classic Bluetooth A2DP connection) with the first control chip 120 in the earphone case 100. The first control chip 120 sends the raw data of the ambient sound information, i.e., the raw PCM audio data, to the second control chip 210 in the earphone 200 via classic Bluetooth. The second control chip 210 in the earphone 200 performs phase inversion processing on the raw data of the ambient sound information to obtain inverted sound information, which is sound information with the same amplitude but opposite phase to the ambient sound information.

[0097] In some other embodiments, in step S411, when the first control chip 120 determines that the duration of the ambient volume being greater than the preset volume threshold exceeds the first preset time threshold, the first control chip 120 performs phase inversion processing on the original data of the ambient sound information to obtain phase inversion sound information. This phase inversion sound information is sound information with the same amplitude and opposite phase to the ambient sound information. It then establishes a classic Bluetooth connection (i.e., a classic Bluetooth A2DP connection) with the second control chip 210 in the headset 200, and then sends the phase inversion sound information to the second control chip 210 in the headset 200 via classic Bluetooth.

[0098] S412: Play out inverted sound information through the headphones 200 for noise reduction.

[0099] In step S412, the second control chip 210 controls the speaker 220 in the earphone 200 to play the aforementioned anti-phase sound information, generating an anti-noise wave with the same amplitude and opposite phase as the ambient sound. This anti-noise wave interferes with and cancels out the ambient sound entering the ear, thereby achieving noise reduction.

[0100] Step S400 also includes:

[0101] S420: When the ambient volume is less than or equal to a preset volume threshold, and the duration of the ambient volume being less than or equal to the preset volume threshold exceeds a second preset time threshold, noise reduction is stopped and the classic Bluetooth connection between the earphone 200 and the earphone case 100 is disconnected.

[0102] In some embodiments, in step S420, when the first control chip 120 determines that the ambient volume is less than or equal to a preset volume threshold, and the duration of the ambient volume being less than or equal to the preset volume threshold exceeds a second preset time threshold, the first control chip 120 stops sending the raw data of the ambient sound information to the earphone 200 and disconnects the classic Bluetooth connection between the earphone 200 and the earphone case 100 used to transmit the raw data of the ambient sound information.

[0103] In some other embodiments, in step S420, when the first control chip 120 determines that the ambient volume is less than or equal to a preset volume threshold, and the duration of the ambient volume being less than or equal to the preset volume threshold exceeds a second preset time threshold, the first control chip 120 stops inverting the original data of the ambient sound information and disconnects the classic Bluetooth connection between the earphone 200 and the earphone case 100 used to transmit inverted sound information.

[0104] In some embodiments, the method further includes the following steps prior to step S100:

[0105] Step S500: Determine the current sleep state of the headphone wearer through the headphone 200. When the sleep state is a preset sleep state, proceed to step S100 and subsequent steps.

[0106] Specifically, in step S500, the second control chip 210 in the earphone 200 determines the current sleep state of the earphone wearer based on information obtained from the sleep state monitoring sensor in the earphone 200. In some embodiments, the sleep state monitoring sensor may be a heart rate sensor, and the second control chip 210 determines the current sleep state of the earphone wearer based on the heart rate information obtained through the heart rate sensor. When the sleep state is a preset sleep state (i.e., no sleep state and / or light sleep state), step S100 and subsequent steps are performed. When the sleep state is a deep sleep state, the second control chip 210 controls the speaker 220 to gradually reduce the current playback volume to 0 at a certain rate (e.g., 4 dBA / s or lower) to avoid the earphone 200 continuously playing music during the user's deep sleep state, which could damage the user's hearing.

[0107] According to a fifth aspect of this application, a control method for the aforementioned headphone case 100 is provided. The control method includes the following steps:

[0108] S600: Acquires ambient sound information.

[0109] Specifically, ambient sound information is collected through the microphone 110 set on the earphone box 100.

[0110] S610: Calculates ambient volume based on ambient sound information;

[0111] Specifically, in step S610, the ambient volume decibel value is first calculated based on the ambient sound information collected by the microphone 110. For example, the ambient volume decibel value is calculated by Fast Fourier Transform (FFT) and A-weighting. Then, the average value of the ambient volume decibel value within a preset time period (e.g., 10s) is calculated, and this average value is the ambient volume.

[0112] S620: Sends ambient volume to earphone 200 which is wirelessly connected to earphone case 100, so that earphone 200 adjusts the current playback volume when the ambient volume is less than or equal to a preset volume threshold, or performs noise reduction when the ambient volume is greater than the preset volume threshold.

[0113] Specifically, the earphone case 100 can send ambient volume data to the earphones 200 via Bluetooth Low Energy, so that the earphones 200 can adjust the current playback volume accordingly when the ambient volume is less than or equal to a preset volume threshold. The earphone case 100 can also send raw ambient sound data to the earphones 200 via Bluetooth Classic, so that when the ambient volume is greater than the preset volume threshold, the earphones 200 can invert the raw ambient sound data to obtain inverted sound information, and then use this inverted sound information for noise reduction.

[0114] According to a sixth aspect of this application, a method for controlling the aforementioned earphone 200 is provided, comprising the following steps:

[0115] S700: Receives ambient volume sent by the earphone box 100 which is wirelessly connected to the earphone 200. The ambient volume is calculated by the earphone box 100 based on the ambient sound information.

[0116] S710: Determines the relationship between ambient volume and a preset volume threshold;

[0117] S720: When the ambient volume is less than or equal to the preset volume threshold, adjust the current playback volume of the headphones 200 according to the ambient volume; or, when the ambient volume is greater than the preset volume threshold, perform noise reduction based on the original data of the ambient sound information.

[0118] Specifically, adjusting the current playback volume of the headphones according to the ambient volume includes:

[0119] S721: Determine the preset volume range to which the ambient volume belongs, where each preset volume range corresponds to a target playback volume, and determine the target playback volume based on the preset volume range to which the ambient volume belongs.

[0120] S722: Adjust the current playback volume of the headphones to the target playback volume at a preset adjustment rate.

[0121] For a detailed description of steps S721-S722, please refer to steps S310-S311, which will not be repeated here.

[0122] Noise reduction is performed based on the raw data of the ambient sound information, including:

[0123] S723: Determine whether the duration of ambient volume exceeding a preset volume threshold exceeds a preset time threshold.

[0124] Specifically, the second control chip 210 in the earphone 200 determines whether the duration of the ambient volume being greater than a preset volume threshold exceeds a first preset time threshold (e.g., 2 minutes or other suitable time threshold).

[0125] S724: When the determination is yes, receive the original data of the ambient sound information sent by the earphone box, perform phase inversion processing on the original data of the ambient sound information, and obtain a phase inverted sound information.

[0126] Specifically, when the second control chip 210 in the earphone 200 determines that the duration for which the ambient volume is greater than a preset volume threshold exceeds a first preset time threshold (e.g., 2 minutes or other suitable time threshold), the second control chip 210 establishes a classic Bluetooth connection (i.e., a classic Bluetooth A2DP connection) with the first control chip 120 in the earphone case 100. The first control chip 120 sends the raw data of the ambient sound information, i.e., the raw PCM audio data, to the second control chip 210 in the earphone 200 via classic Bluetooth. The second control chip 210 in the earphone 200 receives the raw data of the ambient sound information sent by the first control chip 120 and performs phase inversion processing on the raw data of the ambient sound information to obtain inverted sound information. This inverted sound information is sound information with the same amplitude but opposite phase to the ambient sound information.

[0127] S725: Plays out-of-phase audio information for noise reduction.

[0128] Specifically, the second control chip 210 in the earphone 200 controls the speaker 220 to play the aforementioned anti-phase sound information, generating an anti-noise wave with the same amplitude and opposite phase as the ambient sound. This anti-noise wave interferes with and cancels out the ambient sound entering the ear, thereby achieving noise reduction.

[0129] Although exemplary embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above exemplary embodiments are merely illustrative and are not intended to limit the scope of this application. Various changes and modifications can be made therein by those skilled in the art without departing from the scope and spirit of this application. All such changes and modifications are intended to be included within the scope of this application as claimed in the appended claims.

[0130] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0131] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed.

[0132] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of this application may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0133] Similarly, it should be understood that, in order to streamline this application and aid in understanding one or more of the various inventive aspects, features of this application may sometimes be grouped together in a single embodiment, figure, or description thereof in the description of exemplary embodiments of this application. However, this approach should not be construed as reflecting an intention that the claimed application requires more features than are expressly recited in each claim. Rather, as reflected in the corresponding claims, its inventive point lies in solving the corresponding technical problem with features fewer than all features of a single disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of this application.

[0134] Those skilled in the art will understand that, apart from the mutual exclusion of features, all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or elements of any method or apparatus so disclosed can be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature serving the same, equivalent, or similar purpose.

[0135] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0136] It should be noted that the above embodiments are illustrative of this application and not limiting of it, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. This application can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

Claims

1. A sleep-aiding earphone system, characterized by, The application relates to an earphone box, a sleep-aiding earphone and a method for adjusting a current playing volume. The earphone box comprises a microphone and a first control chip, the microphone is used for acquiring environmental sound information, and the first control chip is used for calculating an environmental volume according to the environmental sound information. The sleep-aiding earphone is wirelessly connected with the earphone box and is used for adjusting the current playing volume when the environmental volume is less than or equal to a preset volume threshold value or is used for carrying out noise reduction when the environmental volume is greater than the preset volume threshold value. The sleep-aiding earphone comprises a second control chip. The first control chip sends the environmental volume to the second control chip of the sleep-aiding earphone through low-power Bluetooth, the second control chip judges which preset volume interval the environmental volume belongs to, determines a target playing volume corresponding to the environmental volume according to a corresponding relationship between the preset volume interval and the target playing volume, and the first control chip establishes a classic Bluetooth connection with the second control chip when the environmental volume is greater than the preset volume threshold value and a duration that the environmental volume is greater than the preset volume threshold value exceeds a first preset time threshold value. The first control chip sends original data of the environmental sound information to the second control chip through the classic Bluetooth, the second control chip carries out noise reduction according to the original data of the environmental sound information, or the first control chip carries out reverse processing on the original data of the environmental sound information to obtain reverse sound information and sends the reverse sound information to the second control chip through the classic Bluetooth, and the second control chip carries out noise reduction according to the reverse sound information. The first control chip disconnects the classic Bluetooth connection with the second control chip when the environmental volume is less than or equal to the preset volume threshold value and a duration that the environmental volume is less than or equal to the preset volume threshold value exceeds a second preset time threshold value. The sleep-aiding earphone does not comprise a microphone. The sleep-aiding earphone comprises a second control chip and a loudspeaker.

2. The sleep-aiding earphone system of claim 1, wherein, The second control chip is used for receiving the environmental volume and determining a target playing volume according to a preset volume interval to which the environmental volume belongs when the environmental volume is less than or equal to a preset volume threshold value, each preset volume interval corresponds to a target playing volume. The loudspeaker is used for adjusting the current playing volume to the target playing volume. The first control chip is used for sending original data of the environmental sound information to the sleep-aiding earphone when the environmental volume is greater than the preset volume threshold value and a duration that the environmental volume is greater than the preset volume threshold value exceeds a preset time threshold value. The second control chip is used for receiving the original data of the environmental sound information and carrying out reverse processing on the original data of the environmental sound information to obtain reverse sound information. The loudspeaker is used for playing the reverse sound information to carry out noise reduction. The application relates to a microphone, a sleep-aiding earphone and a method for adjusting a current playing volume.

3. An earphone case, characterized by, The microphone is used for acquiring environmental sound information. ​ The first control chip is configured to calculate an ambient volume according to the ambient sound information, and send the ambient volume to a sleep-aiding earphone wirelessly connected to the earphone box, so that the sleep-aiding earphone adjusts a current playback volume when the ambient volume is less than or equal to a preset volume threshold, or performs noise reduction when the ambient volume is greater than the preset volume threshold. The first control chip sends the ambient volume to a second control chip of the sleep-aiding earphone through Bluetooth Low Energy, so that the second control chip determines which preset volume interval the ambient volume belongs to, and determines a target playback volume corresponding to the ambient volume according to a corresponding relationship between the preset volume interval and the target playback volume. When the ambient volume is greater than the preset volume threshold and a duration for which the ambient volume is greater than the preset volume threshold exceeds a first preset time threshold, the first control chip and the second control chip establish a classic Bluetooth connection, the first control chip sends original data of the ambient sound information to the second control chip through the classic Bluetooth, so that the second control chip performs noise reduction according to the original data of the ambient sound information, or the first control chip performs inverse processing on the original data of the ambient sound information to obtain inverse sound information, and sends the inverse sound information to the second control chip through the classic Bluetooth, so that the second control chip performs noise reduction according to the inverse sound information. When the ambient volume is less than or equal to the preset volume threshold and a duration for which the ambient volume is less than or equal to the preset volume threshold exceeds a second preset time threshold, the first control chip and the second control chip disconnect the classic Bluetooth connection. The sleep-aiding earphone does not include a microphone.

4. A sleep-aiding earphone, characterized by, The sleep-aiding earphone includes a second control chip and a loudspeaker. The second control chip is configured to receive an ambient volume sent by an earphone box wirelessly connected to the sleep-aiding earphone, and adjust a current playback volume of the loudspeaker when the ambient volume is less than or equal to a preset volume threshold, or perform noise reduction when the ambient volume is greater than the preset volume threshold. The first control chip of the earphone box sends the ambient volume to the second control chip through Bluetooth Low Energy, and the second control chip determines which preset volume interval the ambient volume belongs to, and determines a target playback volume corresponding to the ambient volume according to a corresponding relationship between the preset volume interval and the target playback volume. When the ambient volume is greater than the preset volume threshold, and the duration that the ambient volume is greater than the preset volume threshold exceeds a first preset time threshold, the first control chip and the second control chip establish a classic Bluetooth connection, the first control chip sends original data of ambient sound information to the second control chip through classic Bluetooth, so that the second control chip performs noise reduction according to the original data of the ambient sound information, or the first control chip performs inverse processing on the original data of the ambient sound information to obtain inverse sound information, and sends the inverse sound information to the second control chip through classic Bluetooth, so that the second control chip performs noise reduction according to the inverse sound information. When the ambient volume is less than or equal to the preset volume threshold, and the duration that the ambient volume is less than or equal to the preset volume threshold exceeds a second preset time threshold, the first control chip and the second control chip disconnect the classic Bluetooth connection. In the sleep-aiding earphone, no microphone is arranged.

5. The sleep-aiding earphone of claim 4, wherein: The second control chip is configured to determine a target playback volume according to a preset volume interval to which the ambient volume belongs when the ambient volume is less than or equal to the preset volume threshold, each preset volume interval corresponding to a target playback volume. The loudspeaker is configured to adjust the current playback volume to the target playback volume; or The second control chip is configured to receive original data of ambient sound information sent by the earphone box, and perform inverse processing on the original data of the ambient sound information to obtain inverse sound information. The loudspeaker is configured to play the inverse sound information to perform noise reduction. 6.A control method of a sleep-aiding earphone system, the control method based on a sleep-aiding earphone and an earphone case connected wirelessly, characterized in that, The method comprises the following steps: Obtaining ambient sound information through the earphone box; Calculating an ambient volume according to the ambient sound information, and determining the size relationship between the ambient volume and a preset volume threshold; When the ambient volume is less than or equal to the preset volume threshold, adjusting the current playback volume of the sleep-aiding earphone according to the ambient volume, or when the ambient volume is greater than the preset volume threshold, performing noise reduction according to the ambient sound information; The first control chip of the earphone box sends the ambient volume to the second control chip of the sleep-aiding earphone through Bluetooth Low Energy, the second control chip determines which preset volume interval the ambient volume belongs to, and determines the target playback volume corresponding to the ambient volume according to the correspondence between the preset volume interval and the target playback volume. When the ambient volume is greater than the preset volume threshold, and the duration that the ambient volume is greater than the preset volume threshold exceeds a first preset time threshold, the first control chip and the second control chip establish a classic Bluetooth connection, the first control chip sends original data of ambient sound information to the second control chip through classic Bluetooth, so that the second control chip performs noise reduction according to the original data of the ambient sound information, or the first control chip reverses the original data of the ambient sound information to obtain reversed sound information, and sends the reversed sound information to the second control chip through classic Bluetooth, so that the second control chip performs noise reduction according to the reversed sound information. When the ambient volume is less than or equal to the preset volume threshold, and the duration that the ambient volume is less than or equal to the preset volume threshold exceeds a second preset time threshold, the first control chip and the second control chip disconnect the classic Bluetooth connection. The sleep-aiding earphone does not have a microphone.

7. A control method of an earphone case, characterized by, The method comprises the following steps: Obtaining ambient sound information; Calculating an ambient volume according to the ambient sound information; Sending the ambient volume to a sleep-aiding earphone in wireless communication connection with the earphone box, so that the sleep-aiding earphone adjusts a current playback volume when the ambient volume is less than or equal to a preset volume threshold, or performs noise reduction when the ambient volume is greater than the preset volume threshold. The first control chip of the earphone box sends the ambient volume to the second control chip of the sleep-aiding earphone through Bluetooth Low Energy, the second control chip determines which preset volume interval the ambient volume belongs to, and determines a target playback volume corresponding to the ambient volume according to a corresponding relationship between the preset volume interval and the target playback volume. When the ambient volume is greater than the preset volume threshold, and the duration that the ambient volume is greater than the preset volume threshold exceeds a first preset time threshold, the first control chip and the second control chip establish a classic Bluetooth connection, the first control chip sends original data of ambient sound information to the second control chip through classic Bluetooth, so that the second control chip performs noise reduction according to the original data of the ambient sound information, or the first control chip reverses the original data of the ambient sound information to obtain reversed sound information, and sends the reversed sound information to the second control chip through classic Bluetooth, so that the second control chip performs noise reduction according to the reversed sound information. The sleep-aiding earphone does not have a microphone.

8. The control method according to claim 7, wherein The ambient volume is calculated according to the ambient sound information, comprising: An ambient volume decibel value is calculated according to the ambient sound information; An average value of the ambient volume decibel value in a preset time period is calculated, and the average value is the ambient volume. 9.A control method of a sleep-aiding earphone, the method comprising: The method comprises the following steps: Receiving an ambient volume sent by an earphone box in wireless communication connection with the sleep-aiding earphone, the ambient volume being calculated by the earphone box according to ambient sound information; determine a size relationship between the ambient sound volume and a preset volume threshold value; when the ambient sound volume is less than or equal to the preset volume threshold value, adjust a current playback volume of the sleep-aiding earphone according to the ambient sound volume, or when the ambient sound volume is greater than the preset volume threshold value, perform noise reduction according to original data of the ambient sound information; the first control chip of the earphone box sends the ambient sound volume to the second control chip of the sleep-aiding earphone through Bluetooth low energy, the second control chip determines which preset volume interval the ambient sound volume belongs to, and determines a target playback volume corresponding to the ambient sound volume according to a corresponding relationship between the preset volume interval and the target playback volume; when the ambient sound volume is greater than the preset volume threshold value and a duration for which the ambient sound volume is greater than the preset volume threshold value exceeds a first preset time threshold value, the first control chip and the second control chip establish a classic Bluetooth connection, the first control chip sends original data of the ambient sound information to the second control chip through classic Bluetooth, so that the second control chip performs noise reduction according to the original data of the ambient sound information, or the first control chip performs inverse processing on the original data of the ambient sound information to obtain inverse sound information, and sends the inverse sound information to the second control chip through classic Bluetooth, so that the second control chip performs noise reduction according to the inverse sound information; when the ambient sound volume is less than or equal to the preset volume threshold value and a duration for which the ambient sound volume is less than or equal to the preset volume threshold value exceeds a second preset time threshold value, the first control chip and the second control chip disconnect the classic Bluetooth connection; wherein no microphone is arranged in the sleep-aiding earphone.

10. The control method of claim 9, wherein the adjusting the current playback volume of the sleep-aiding earphone according to the ambient sound volume comprises: determining a preset volume interval to which the ambient sound volume belongs, each preset volume interval corresponding to a target playback volume, and determining the target playback volume according to the preset volume interval to which the ambient sound volume belongs; adjusting the current playback volume of the sleep-aiding earphone to the target playback volume at a preset adjustment rate.

11. The control method of claim 9, wherein the performing noise reduction according to the original data of the ambient sound information comprises: determining whether a duration for which the ambient sound volume is greater than the preset volume threshold value exceeds a first preset time threshold value; when the determination is yes, receiving original data of the ambient sound information sent by the earphone box, performing inverse processing on the original data of the ambient sound information to obtain inverse sound information; and playing the inverse sound information to perform noise reduction.

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