Noise reduction system

Abstract

The utility model discloses a noise reduction system. The noise reduction system is connected with sound production equipment, and at least comprises main equipment which is connected with the sound production equipment, is close to a noise source and is far away from the sound production equipment; wherein the main equipment is configured to acquire a noise source signal from the noise source, and acquire and send a target noise reduction parameter to the sound production equipment based on the noise source signal; and the sound production equipment is configured to receive the target noise reduction parameter, and generate and play a target audio based on the target noise reduction parameter. According to the invention, high-power noise reduction is realized.

Description

TECHNICAL FIELD

[0001] Embodiments disclosed in the present application relate to the field of acoustics, and more particularly, to a noise reduction system. BACKGROUND

[0002] At present, noise reduction equipment is mostly based on earphones. However, due to the congenital structural defects of earphone-shaped noise reduction equipment, it is difficult to achieve higher power noise reduction and longer battery life. In addition, due to the inconsistency of ear pressure, it is easy to cause ear pressure problems. SUMMARY

[0003] According to the embodiments of the present application, a noise reduction system is proposed to solve the above problems.

[0004] The first aspect of the present application discloses a noise reduction system connected with a sound generating device, at least comprising: a master device connected with the sound generating device, close to a noise source and away from the sound generating device; wherein the master device is configured to collect a noise source signal from the noise source, obtain a target noise reduction parameter based on the noise source signal, and send the target noise reduction parameter to the sound generating device; and the sound generating device is configured to receive the target noise reduction parameter, generate and play a target audio based on the target noise reduction parameter.

[0005] In some embodiments, a slave device is connected with the master device and the sound generating device, and is configured to receive the target noise reduction parameter from the master device and send the target noise reduction parameter to the sound generating device.

[0006] In some embodiments, the slave device comprises: a first transmission circuit connected with the master device and configured to receive the target noise reduction parameter from the master device; a second transmission circuit connected with the sound generating device and configured to send the target noise reduction parameter to the sound generating device; and a first control circuit connected with the first transmission circuit and the second transmission circuit, and configured to transmit the target noise reduction parameter from the first transmission circuit to the second transmission circuit.

[0007] In some embodiments, the slave device further comprises: a first microphone configured to collect an environmental noise signal of the sound generating device; wherein the first transmission circuit is further configured to send the environmental noise signal to the master device, so that the master device receives the environmental noise signal, optimizes the target noise reduction parameter, and sends the optimized target noise reduction parameter to the sound generating device.

[0008] In some embodiments, the first transmission circuit comprises a Bluetooth transmission circuit and / or a WIFI transmission circuit; and the second transmission circuit comprises an earphone interface and / or a data interface.

[0009] In some embodiments, the master device comprises: a second microphone configured to collect a noise source signal generated by the noise source; a second control circuit connected with the second microphone and configured to obtain the target noise reduction parameter based on the noise source signal; and a third transmission circuit connected with the second control circuit and configured to send the target noise reduction parameter to the sound generating device.

[0010] In some embodiments, the noise reduction system further comprises a cloud server connected with the master device; the master device comprises: a second microphone configured to collect a noise source signal generated by the noise source; a second control circuit connected with the second microphone and configured to process the noise source signal to extract time domain information of the noise source signal; a third transmission circuit connected with the second control circuit and configured to transmit the time domain information to the cloud server, receive the target noise reduction parameter from the cloud server, and send the target noise reduction parameter to the sound generating device.

[0011] In some embodiments, the cloud server is configured to store preset noise reduction parameters; and the cloud server is configured to receive the time domain information of the noise source signal, determine the target noise reduction parameter from the preset noise reduction parameters according to the time domain information.

[0012] In some embodiments, the third transmission circuit comprises a Bluetooth transmission circuit and / or a WIFI transmission circuit.

[0013] In some embodiments, the master device is spaced apart from the sound generating device by a first preset distance, and the slave device is spaced apart from the sound generating device by a second preset distance, the first preset distance being greater than the second preset distance.

[0014] The noise reduction system comprises a master device connected with a sound generating device, and the master device is close to a noise source and far away from the sound generating device. The master device collects a noise source signal from the noise source, obtains and sends a target noise reduction parameter to the sound generating device based on the noise source signal, and then the sound generating device receives the target noise reduction parameter and generates a target audio. The target audio is played by the sound generating device, which can achieve high-power noise reduction and solve the inconvenience problem of long-term wearing of earphones. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present application will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0016] Figure 1 is a partial structure schematic diagram of a noise reduction system of an embodiment of the present application;

[0017] Figure 2 is a partial structure schematic diagram of a noise reduction system of an embodiment of the present application;

[0018] Figure 3 is a structural schematic diagram of a slave device of an embodiment of the present application;

[0019] Figure 4 is a partial structural schematic diagram of a noise reduction system of an embodiment of the present application;

[0020] Figure 5 is a structural schematic diagram of a master device of an embodiment of the present application;

[0021] Figure 6 is a circuit schematic diagram of a master device of an embodiment of the present application;

[0022] Figure 7 is a circuit schematic diagram of a slave device of an embodiment of the present application. DETAILED DESCRIPTION

[0023] Reference throughout this application to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be combined with any of the other embodiments unless specifically noted otherwise.

[0024] The term "and / or" in this application merely describes an associated relationship between associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects. In addition, "multiple" in this application means two or more than two. In addition, the term "at least one" in this application means any one of the multiple or any combination of at least two of the multiple, for example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C. In addition, the terms "first", "second", "third" in this application are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0025] In order for those skilled in the art to better understand the technical solutions of the present application, the technical solutions of the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0026] Please refer to Figure 1 , Figure 1 is a partial structural schematic diagram of a noise reduction system of an embodiment of the present application. The noise reduction system 100 is connected with a sound emitting device 200, wherein the noise reduction system 100 comprises a master device 110. In some embodiments, as shown in FIG. 1, the noise reduction system 100 further comprises a slave device 120.Figure 1 As shown, the master device 110 is connected with the sound-emitting device 200. In the distance position, the master device 110 is close to the noise source 300 and far away from the sound-emitting device 200.

[0027] The master device 110 is configured to collect a noise source signal from the noise source 300, obtain target noise reduction parameters based on the noise source signal, and send the target noise reduction parameters to the sound-emitting device 200. In some examples, the master device 110 is an electronic device that can be moved, and the master device 110 is placed near the noise source 300. For example, the noise source 300 is a high-power electrical device that generates noise when working, and the master device 110 can be placed / adsorbed on the high-power electrical device to receive the noise source signal generated thereby. Further, the master device 110 obtains and sends the target noise reduction parameters to the sound-emitting device 200 based on the noise source signal collected from the noise source 300. The target noise reduction parameters include a frequency range, a center frequency, a bandwidth, a gain, and an intensity, etc.

[0028] The sound-emitting device 200 is configured to receive the target noise reduction parameters, generate and play target audio based on the target noise reduction parameters. For example, the sound-emitting device 200 receives the target noise reduction parameters from the master device 110, and then the sound-emitting device 200 generates and plays the target audio based on the target noise reduction parameters. The target audio can be a sound wave signal opposite in phase to the noise source signal collected by the noise source 300, and the environmental noise reduction can be achieved by playing the target audio by the sound-emitting device 200. The sound-emitting device 200 can be a portable speaker, a conventional sound, etc.

[0029] In this embodiment, the noise reduction system 100 includes the master device 110 connected with the sound-emitting device 200, and the master device 110 is close to the noise source 300 and far away from the sound-emitting device 200. The master device 110 collects a noise source signal from the noise source 300, obtains and sends target noise reduction parameters to the sound-emitting device 200 based on the noise source signal, and then the sound-emitting device 200 receives the target noise reduction parameters and generates target audio, which can be played by the sound-emitting device 200 to achieve high-power noise reduction and solve the inconvenience of long-term wearing of earphones for noise reduction.

[0030] In some embodiments, as shown in Figure 2 , Figure 2 is a partial structure schematic diagram of a noise reduction system according to an embodiment of the present application. The noise reduction system 100 includes a master device 110 and a slave device 120. The slave device 120 is connected with the master device 110 and a sound-emitting device 200, and the slave device 120 is configured to receive target noise reduction parameters from the master device 110 and send the target noise reduction parameters to the sound-emitting device 200.

[0031] In some examples, the master device 110 collects a noise source signal from the noise source 300, obtains a target noise reduction parameter based on the noise source signal for the slave device 120, and sends the received target noise reduction parameter to the sound emitting device 200. The sound emitting device 200 receives the target noise reduction parameter from the slave device 120, and then generates and plays a target audio based on the target noise reduction parameter. The target audio can be a sound wave signal opposite in phase to the noise source signal collected by the noise source 300, so that the sound emitting device 200 plays the target audio to achieve noise reduction.

[0032] In the embodiments of the present application, the slave device 120 is connected with the master device 110 and the sound emitting device 200. The slave device 120 receives the target noise reduction parameter from the master device 110 and sends the target noise reduction parameter to the sound emitting device 200, so that the sound emitting device 200 generates and plays the target audio based on the target noise reduction parameter, thereby improving the noise reduction effect.

[0033] In some embodiments, as shown in Figures 2-3 Figure 3 FIG. 1 is a structural schematic diagram of a slave device according to an embodiment of the present application. The slave device 120 includes a first transmission circuit 1201, a second transmission circuit 1202, and a first control circuit 1203.

[0034] The first transmission circuit 1201 is configured to be connected with the master device 110, and is configured to receive the target noise reduction parameter from the master device 110. The second transmission circuit 1202 is configured to be connected with the sound emitting device 200, and is configured to send the target noise reduction parameter to the sound emitting device 200. The first control circuit 1203 is configured to be connected with the first transmission circuit 1201 and the second transmission circuit 1202, and is configured to transmit the target noise reduction parameter from the first transmission circuit 1201 to the second transmission circuit 1202.

[0035] In some embodiments, the first transmission circuit 1201 includes a Bluetooth transmission circuit and / or a WIFI transmission circuit; and the second transmission circuit 1202 includes a headphone interface and / or a data interface.

[0036] For example, the first transmission circuit 1201 includes at least one of a Bluetooth transmission circuit and a WIFI transmission circuit. The second transmission circuit 1202 includes at least one of a headphone interface and a data interface.

[0037] In some examples, the sound emitting device 200 supports Bluetooth function, and the first transmission circuit 1201 is a Bluetooth transmission circuit. The slave device 120 and the sound emitting device 200 can be connected by Bluetooth. At this time, the first transmission circuit 1201 receives the target noise reduction parameter from the master device 110 through the Bluetooth connection, and sends the target noise reduction parameter to the sound emitting device 200 through the Bluetooth connection by the first transmission circuit 1201.​

[0038] In some examples, the sound production device 200 does not support Bluetooth function, the first transmission circuit 1201 is a Bluetooth transmission circuit, and the second transmission circuit 1202 is a headphone interface circuit. The master device 110 and the slave device 120 can be connected by Bluetooth, but the master device 110, the slave device 120 and the sound production device 200 cannot be connected by Bluetooth. At this time, the first transmission circuit 1201 receives the target noise reduction parameter from the master device 110 through the Bluetooth connection, and the target noise reduction parameter is transmitted from the first transmission circuit 1201 to the second transmission circuit 1202 by the first control circuit 1203. The second transmission circuit 1202 can send the target noise reduction parameter to the sound production device 200 through the headphone interface. Wherein, the headphone interface can be a 3.5mm headphone interface, which is used to transmit audio data.

[0039] In some embodiments, as shown in Figure 3 The slave device 120 further includes a first microphone 1204 configured to collect an ambient noise signal of the environment where the sound production device 200 is located. Wherein, the first transmission circuit 1201 is further configured to send the ambient noise signal to the master device 110, so that the master device 110 receives the ambient noise signal, optimizes the target noise reduction parameter, and sends the optimized target noise reduction parameter to the sound production device 200.

[0040] In some examples, the sound production device 200 receives the target noise reduction parameter from the master device 110, and generates and plays the target audio based on the target noise reduction parameter. At this time, the first microphone 1204 collects the ambient noise signal of the environment where the sound production device 200 is located. The ambient noise signal can be a sound wave signal collected by the first microphone 1204 in the preset space after the sound production device 200 plays the target audio in the preset space, which is the sound wave signal after the target audio and the noise source signal cancel each other out. The first transmission circuit 1201 sends the ambient noise signal collected by the first microphone 1204 to the master device 110, so that the master device 110 receives the ambient noise signal, optimizes the target noise reduction parameter, and sends the optimized target noise reduction parameter to the sound production device 200. Then, the sound production device 200 generates and plays new target audio based on the optimized target noise reduction parameter, and plays the new target audio through the sound production device 200, so as to achieve more efficient noise reduction.

[0041] Please refer to Figures 4-5 , Figure 4 is a partial structure schematic diagram of a noise reduction system according to an embodiment of the present application, Figure 5 is a structure schematic diagram of a master device according to an embodiment of the present application. In some embodiments, the noise reduction system 100 further includes a cloud server 400 connected with the master device 110. Wherein, the master device 110 includes a second microphone 1101, a second control circuit 1102 and a third transmission circuit 1103.

[0042] The second microphone 1101 is configured to collect a noise source signal generated by the noise source 300. The second control circuit 1102 is connected with the second microphone 1101, and the second control circuit 1102 is configured to process the noise source signal to extract time domain information of the noise source signal. The third transmission circuit 1103 is connected with the second control circuit 1102, and the third transmission circuit 1103 is configured to transmit the time domain information to the cloud server 400, receive the target noise reduction parameter from the cloud server 400, and send the target noise reduction parameter to the sound generating device 200. That is, the master device 110 can be connected with the sound generating device 200 and the cloud server 400 through the third transmission circuit.

[0043] In some examples, the second microphone 1101 collects the noise source signal from the noise source 300. The second control circuit 1102 processes the noise source signal to extract time domain information of the noise source signal, such as obtaining key waveform information of the noise source signal. The third transmission circuit 1103 is connected with the second control circuit 1102, and the third transmission circuit 1103 transmits the time domain information to the cloud server 400, and the third transmission circuit 1103 receives the target noise reduction parameter from the cloud server 400, and the third transmission circuit 1103 sends the received target noise reduction parameter to the sound generating device 200.

[0044] In some examples, the second microphone 1101 collects the noise source signal from the noise source 300. The second control circuit 1102 processes the noise source signal to extract time domain information of the noise source signal, such as obtaining key waveform information of the noise source signal. The third transmission circuit 1103 is connected with the second control circuit 1102, and the third transmission circuit 1103 transmits the time domain information to the cloud server 400, and the third transmission circuit 1103 receives the target noise reduction parameter from the cloud server 400, and the third transmission circuit 1103 sends the received target noise reduction parameter to the sound generating device 200.

[0045] In some embodiments, the cloud server 400 is configured to store preset noise reduction parameters; and the cloud server 400 is configured to receive time domain information of the noise source signal, and determine the target noise reduction parameter from the preset noise reduction parameters according to the time domain information.

[0046] The cloud server 400 stores preset noise reduction parameters, which can be different combinations of noise reduction parameters. The host device 110 (e.g., the third transmission circuit 1103) transmits time domain information to the cloud server 400, and the cloud server 400 receives the time domain information of the noise source signal, and then determines the target noise reduction parameter from the preset noise reduction parameters according to the time domain information. For example, the cloud server 400 can select the noise reduction parameter combination corresponding to the key waveform of the noise source signal transmitted by the host device 110 (e.g., the third transmission circuit 1103) from a plurality of preset noise reduction parameter combinations, that is, determine the target noise reduction parameter. Further, the cloud server 400 sends the target noise reduction parameter to the host device 110 (e.g., the third transmission circuit 1103).

[0047] In some embodiments, referring to Figure 1 and Figure 5 , the host device 110 includes a second microphone 1101, a second control circuit 1102, and a third transmission circuit 1103.

[0048] The second microphone 1101 is configured to collect a noise source signal generated by the noise source 300. The second control circuit 1102 is connected to the second microphone 1101 and is configured to obtain a target noise reduction parameter based on the noise source signal. The third transmission circuit 1103 is connected to the second control circuit 1102 and is configured to send the target noise reduction parameter to the sound generating device 200, that is, the host device 110 can be connected to the sound generating device 200 through the third transmission circuit 1103.

[0049] In some examples, the second microphone 1101 collects a noise source signal from the noise source 300. The second control circuit 1102 obtains a target noise reduction parameter based on the noise source signal, for example, processes the noise source signal to extract the time domain information of the noise source signal, and calculates and determines the target noise reduction parameter based on the time domain information of the noise source signal. Further, the third transmission circuit 1103 sends the obtained target noise reduction parameter to the sound generating device 200.

[0050] In some embodiments, the third transmission circuit 1103 includes a Bluetooth transmission circuit and / or a WIFI transmission circuit.

[0051] The third transmission circuit 1103 includes at least one of a Bluetooth transmission circuit and a Wi-Fi transmission circuit. That is, the master device 110 can connect to the slave device 120, the sound-emitting device 200, and the cloud server 400 via Bluetooth / Wi-Fi. For example, the master device 110 can transmit the time-domain information of the noise source signal to the cloud server 400 via Bluetooth / Wi-Fi and receive the target noise reduction parameters from the cloud server 400. The master device 110 can also transmit the target noise reduction parameters to the slave device 120 and the sound-emitting device 200 via Bluetooth / Wi-Fi. Of course, the third transmission circuit 110 may also include a headphone jack and / or a data interface for data transmission.

[0052] In some embodiments, the master device 110 is spaced apart from the sound-emitting device 200 by a first preset distance, and the slave device 120 is spaced apart from the sound-emitting device 200 by a second preset distance, wherein the first preset distance is greater than the second preset distance.

[0053] The master device 110 is separated from the sound-emitting device 200 by a first preset distance d1, and the slave device 120 is separated from the sound-emitting device 200 by a second preset distance d2, where d1 is greater than d2. For example, the sound-emitting device 200 receives target noise reduction parameters at a distance d1 from the master device 110, and generates and plays target audio based on the target noise reduction parameters. At this time, the slave device 120 collects an ambient noise signal at a distance d2 from the sound-emitting device 200. The ambient noise signal can be the sound wave signal collected by the slave device 120 after the sound-emitting device 200 plays the target audio in a preset space, which is the result of the target audio and the noise source signal canceling each other out. The device 120 sends the collected environmental noise signal to the main device 110, so that the main device 110 receives the environmental noise signal to optimize the target noise reduction parameters, and sends the optimized target noise reduction parameters to the sound-generating device 200. Then, the sound-generating device 200 generates and plays a new target audio based on the optimized target noise reduction parameters, and then plays the new target audio through the sound-generating device 200 to achieve more efficient noise reduction.

[0054] In some examples, such as Figure 6 As shown, Figure 6 This is a circuit diagram of a main device according to an embodiment of this application. The main device 110 includes a battery, a Type-C port, a power integrated circuit (POWER_IC), a memory (DDR3), an analog-to-digital converter (ADC), a DSP (Digital Signal Processing, audio processing chip), a Bluetooth / Wi-Fi circuit, a microphone (MIC), and a flash memory, etc. The DSP can be the second control circuit 1102 described above, and the Bluetooth / Wi-Fi circuit can be the third transmission circuit 1103 described above.

[0055] In some examples, as Figure 7 shown, Figure 7 is a circuit schematic diagram of a slave device of an embodiment of the present application. The slave device 120 includes a battery, a Typc-C, a power integrated circuit (POWER IC), a memory (DDR3), a codec, a DSP (Digital Signal Processing, an audio processing chip), a Bluetooth / WIFI circuit, a microphone (MIC), a FLASH, a PA (Power amplifier, a radio frequency power amplifier), and an interface, etc. Among them, the DSP can be the first control circuit 1203 described above, the Bluetooth / WIFI circuit can be the first transmission circuit 1201 described above, and the interface can be part of the second transmission circuit 1202 described above.

[0056] To facilitate understanding, the application scenarios of the noise reduction system of the embodiments of the present application are exemplified. For example, in a home use scenario, the master device 110 can be placed near an air conditioning device, the master device 110 collects the noise generated by the air conditioning device when it works, the master device 110 obtains and sends target noise reduction parameters to the sound emitting device 200 placed around the user based on the collected noise, and then the sound emitting device 200 generates and plays target audio based on the target noise reduction parameters, thereby realizing the elimination of the noise generated by the air conditioning device when it works; or in a large industrial workshop, the master device 110 can be placed near the workshop equipment, the master device 110 collects the noise generated by the workshop equipment when it works, the master device 110 obtains and sends target noise reduction parameters to the sound emitting device 200 placed in the office based on the collected noise, and then the sound emitting device 200 generates and plays target audio based on the target noise reduction parameters, thereby realizing office environment noise reduction, etc. In actual application, for users who need background music or self-defined, the user can adjust or play music through a mobile phone or other electronic device; accordingly, the mobile phone or other electronic device can also give recommended sound emitting device 120 placement positions and corresponding sound power levels, etc.

[0057] The above description of various embodiments tends to emphasize the differences between various embodiments, and the same or similar parts can be referred to each other. For the sake of brevity, the same or similar parts will not be described again.

[0058] In several embodiments provided in the present application, it should be understood that the disclosed method and related device can be implemented in other manners. For example, the division of the related device embodiments is merely illustrative, and the division of the modules or units can be changed according to the actual needs. For example, some modules or units can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0059] In addition, each functional unit in the embodiments of the present application can be integrated in a processing unit, or each unit can exist physically as a separate unit, or two or more units can be integrated in a unit. The above-mentioned integrated unit can be implemented in a form of hardware, or in a form of software functional units.

[0060] It is easy for those skilled in the art to make modifications and variations to the device and method without departing from the teaching content of the present application. Therefore, the above disclosure should be regarded as limited only by the scope of the appended claims.

Claims

1. A noise reduction system, characterized by, The noise reduction system comprises a sound generating device and a master device connected with the sound generating device. The master device is connected with the sound generating device, is close to a noise source and is far away from the sound generating device. The master device is configured to collect a noise source signal from the noise source, obtain a target noise reduction parameter based on the noise source signal and send the target noise reduction parameter to the sound generating device. The sound generating device is configured to receive the target noise reduction parameter, generate and play a target audio based on the target noise reduction parameter.

2. The noise reduction system of claim 1, wherein, The noise reduction system further comprises a slave device connected with the master device and the sound generating device. The slave device is configured to receive the target noise reduction parameter from the master device and send the target noise reduction parameter to the sound generating device.

3. The noise reduction system of claim 2, wherein, The slave device comprises a first transmission circuit connected with the master device and configured to receive the target noise reduction parameter from the master device, a second transmission circuit connected with the sound generating device and configured to send the target noise reduction parameter to the sound generating device and a first control circuit connected with the first transmission circuit and the second transmission circuit and configured to transmit the target noise reduction parameter from the first transmission circuit to the second transmission circuit. The slave device further comprises a first microphone configured to collect an ambient noise signal of an environment where the sound generating device is located. The first transmission circuit is further configured to send the ambient noise signal to the master device so that the master device receives the ambient noise signal, optimizes the target noise reduction parameter and sends the optimized target noise reduction parameter to the sound generating device.

5. The noise reduction system according to claim 3, wherein the first transmission circuit comprises a Bluetooth transmission circuit and / or a WIFI transmission circuit; and the second transmission circuit comprises a headphone interface and / or a data interface.

4. The noise reduction system of claim 3, wherein, The master device comprises a second microphone configured to collect a noise source signal generated by the noise source, a second control circuit connected with the second microphone and configured to obtain the target noise reduction parameter based on the noise source signal and a third transmission circuit connected with the second control circuit and configured to send the target noise reduction parameter to the sound generating device. The noise reduction system further comprises a cloud server connected with the master device. The master device comprises a second microphone configured to collect a noise source signal generated by the noise source, a second control circuit connected with the second microphone and configured to process the noise source signal to extract time domain information of the noise source signal and a third transmission circuit connected with the second control circuit and configured to transmit the time domain information to the cloud server, receive the target noise reduction parameter from the cloud server and send the target noise reduction parameter to the sound generating device. The cloud server is configured to store preset noise reduction parameters; and The cloud server is configured to receive the time domain information of the noise source signal, determine the target noise reduction parameter from the preset noise reduction parameters according to the time domain information. The third transmission circuit comprises a Bluetooth transmission circuit and / or a WIFI transmission circuit.

6. The noise reduction system of claim 1, wherein, ​ ​ ​ ​ 7. The noise reduction system of claim 1, wherein, ​ ​ ​ ​ ​ 8. The noise reduction system of claim 7, wherein, ​ ​ 9. The noise reduction system of claim 6 or 7, wherein, ​ 10. The noise reduction system of claim 2, wherein, The master device is spaced apart from the sound generating device by a first preset distance, the slave device is spaced apart from the sound generating device by a second preset distance, and the first preset distance is greater than the second preset distance.

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