Noise reduction control method and device for air conditioner, air conditioner and computer readable storage medium

Abstract

The invention relates to the technical field of air conditioners, and discloses a noise reduction control method for an air conditioner, the air conditioner is provided with a sound pick-up and a loudspeaker, the sound pick-up is used for collecting noise during operation of air conditioner components, and the noise reduction control method comprises the steps that under the condition that the air conditioner operates, a noise signal is obtained through the sound pick-up, and loudspeaker frequency response is obtained through the loudspeaker; analyzing the noise signal, and determining a noise spectrum and an initial loudspeaker frequency domain signal opposite to the noise spectrum; adjusting the gain of the initial loudspeaker frequency domain signal based on the active noise reduction technology and the loudspeaker frequency domain response to obtain a target loudspeaker frequency domain signal; and outputting a loudspeaker time domain signal corresponding to the target loudspeaker frequency domain signal through the loudspeaker. According to the method, the noise reduction effect on the noise of the air conditioner can be improved. The invention further discloses a noise reduction control device for the air conditioner, the air conditioner and a computer readable storage medium.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, and for example, relates to a noise reduction control method and device for an air conditioner, an air conditioner, and a computer-readable storage medium. Background Art

[0002] Currently, during the operation of an air conditioner, the noise generated by the air conditioner itself (for example, the indoor fan noise or the air deflector noise) interferes with the work and life of users. Based on this, how to eliminate the noise generated by the indoor unit during the operation of the air conditioner has become a technical problem that urgently needs to be solved.

[0003] In order to eliminate the noise generated by the indoor unit during the operation of the air conditioner, a related technology discloses a method for voice noise reduction, including the following steps: Step 1, determine the microphone unit in the microphone array affected by the speaker's broadcast. By default, it is the microphone unit whose voice collection direction of the microphone is in the same direction as the speaker's broadcast direction. Step 2, when the microphone array collects the user's voice command, determine whether the speaker is broadcasting voice. If there is no broadcast, no speaker noise reduction processing is performed. Step 3, when it is determined that the speaker is broadcasting, the speaker noise reduction unit performs noise reduction processing on the audio data collected by the affected microphone unit. The noise reduction process is active noise reduction, which generates an equal reverse sound wave by processing the broadcast sound source of the speaker, so that it undergoes destructive interference with the sound wave collected by the affected microphone unit.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related technology:

[0005] The response characteristics of different speakers are different in different frequency bands. When the related technology processes the broadcast sound source of the speaker and generates a reverse sound wave, it does not consider the influence of the speaker's own response characteristics on the generation of the reverse sound wave, which results in the inability of the reverse sound wave to undergo destructive interference with the sound wave collected by the microphone, leading to a deterioration in the noise reduction effect.

[0006] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0007] In order to have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. The summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments, but rather serves as a preface to the subsequent detailed description.

[0008] The embodiments of the present disclosure provide a noise reduction control method, device and air conditioner, and computer-readable storage medium for an air conditioner to improve the noise reduction effect of the noise generated by the air conditioner itself.

[0009] In some embodiments, the air conditioner is configured with a microphone and a speaker. The microphone is used to collect the noise during the operation of the air conditioner components. The method includes: when the air conditioner is operating, obtaining a noise signal through the microphone and obtaining a speaker frequency response through the speaker; analyzing the noise signal to determine a noise spectrum and an initial speaker frequency domain signal that is out of phase with the noise spectrum; adjusting the gain of the initial speaker frequency domain signal based on active noise cancellation technology and the speaker frequency response to obtain a target speaker frequency domain signal; and outputting, through the speaker, a speaker time domain signal corresponding to the target speaker frequency domain signal.

[0010] In some embodiments, adjusting the gain of the initial speaker frequency domain signal based on active noise cancellation technology and the speaker frequency response to obtain a target speaker frequency domain signal includes: determining the noise energy according to the noise spectrum; determining a target frequency gain according to the noise energy and the speaker frequency response; and obtaining the target speaker frequency domain signal according to the product of the initial speaker frequency domain signal and the target frequency gain.

[0011] In some embodiments, determining a target frequency gain according to the noise energy and the speaker frequency response includes: determining an initial frequency gain and a correction gain according to the noise energy and the speaker frequency response; and correcting the initial frequency gain according to the correction gain to determine the target frequency gain.

[0012] In some embodiments, the correction gain is determined in the following manner: determining an initial correction gain according to the sum value of α·P n (f) and β; determining the correction gain according to the initial correction gain and the speaker frequency response; where P n (f) represents the noise energy, α and β respectively represent a first coefficient and a second coefficient, the initial correction gain is positively correlated with the correction gain, and the speaker frequency response is negatively correlated with the correction gain.

[0013] In some embodiments, determining the correction gain according to the initial correction gain and the speaker frequency response includes: obtaining the current speaker frequency response at the current frequency; when the current speaker frequency response is in the high frequency band, determining the product of the initial correction gain and a third coefficient as the correction gain; when the current speaker frequency response is in the low frequency band, determining the product of the initial correction gain and a fourth coefficient as the correction gain; where the third coefficient is greater than the fourth coefficient and the fourth coefficient is greater than 1.

[0014] In some embodiments, the third coefficient is the reciprocal of the current speaker frequency response, and / or, the fourth coefficient is the reciprocal of the current speaker frequency response.

[0015] In some embodiments, the noise signal is analyzed to determine the noise spectrum and the initial speaker frequency-domain signal that is out of phase with the noise spectrum, including: adaptively filtering the noise signal based on an adaptive filtering algorithm to obtain the noise frequency and noise amplitude of the noise signal; generating an initial speaker signal according to the noise frequency and noise amplitude, where the initial speaker signal is a sound wave signal with the same amplitude value as the noise signal and the opposite phase.

[0016] In some embodiments, the device includes a processor and a memory storing program instructions, and the processor is configured to execute the noise reduction control method for an air conditioner as described above when running the program instructions.

[0017] In some embodiments, the air conditioner includes: an air conditioner body, the air conditioner body includes a microphone and a speaker, and the microphone is used to collect the noise during the operation of the air conditioner components; the noise reduction control device for an air conditioner as described above is installed on the air conditioner body.

[0018] In some embodiments, the computer-readable storage medium stores program instructions, and when the program instructions are running, they are used to cause a computer to execute the noise reduction control method for an air conditioner as described above.

[0019] The noise reduction control method, device, air conditioner, and computer-readable storage medium provided by the embodiments of the present disclosure can achieve the following technical effects:

[0020] When the air conditioner is running, it first obtains the noise signal through the microphone and the speaker frequency response through the speaker. Then, the noise signal is analyzed to determine the noise spectrum and the initial speaker frequency-domain signal that is out of phase with the noise spectrum. The air conditioner then adjusts the gain of the initial speaker frequency-domain signal based on the active noise reduction technology and the speaker frequency response to obtain a target speaker frequency-domain signal that is adapted to the gain of the noise spectrum. Finally, the air conditioner outputs the speaker time-domain signal corresponding to the target speaker frequency-domain signal through the speaker. The embodiments of the present disclosure consider the influence of the speaker response characteristics on the initial speaker time-domain signal. By combining the speaker frequency response and the active noise reduction technology to adjust the gain of the initial speaker frequency-domain signal, a speaker time-domain signal that can cancel the interference with the noise signal can be generated, thereby improving the noise reduction effect on the noise of the air conditioner itself.

[0021] The above general description and the following description are only exemplary and explanatory, and are not used to limit this application. Description of the Drawings

[0022] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and wherein:

[0023] Figure 1 is a schematic diagram of a noise reduction control method for an air conditioner provided by an embodiment of the present disclosure;

[0024] Figure 2 is a schematic diagram of another noise reduction control method for an air conditioner provided by an embodiment of the present disclosure;

[0025] Figure 3 is a schematic diagram of another noise reduction control method for an air conditioner provided by an embodiment of the present disclosure;

[0026] Figure 4 is a schematic diagram of another noise reduction control method for an air conditioner provided by an embodiment of the present disclosure;

[0027] Figure 5 is a schematic diagram of a noise reduction control device for an air conditioner provided by an embodiment of the present disclosure;

[0028] Figure 6 is a schematic diagram of an air conditioner provided by an embodiment of the present disclosure. Detailed implementation manners

[0029] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the drawings. The attached drawings are for reference and illustration purposes only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, multiple details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be shown in a simplified manner.

[0030] In the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings, the terms "first", "second", etc. are used to distinguish similar objects and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so as to implement the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0031] Unless otherwise specified, the term "plural" means two or more.

[0032] In the embodiments of the present disclosure, the character " / " indicates that the objects before and after are in an "or" relationship. For example, A / B means: A or B.

[0033] The term "and / or" describes the relationship between objects and indicates that there can be three relationships. For example, A and / or B means: A or B, or, the three relationships of A and B.

[0034] The term "corresponding" can refer to an association relationship or a binding relationship. A corresponding to B means that there is an association relationship or a binding relationship between A and B.

[0035] In the embodiments of the present disclosure, an intelligent household appliance device refers to a household appliance product formed by introducing a microprocessor, sensor technology, and network communication technology into a household appliance device, and has the characteristics of intelligent control, intelligent perception, and intelligent application. The operation process of the intelligent household appliance device often depends on the application and processing of modern technologies such as the Internet of Things, the Internet, and electronic chips. For example, the intelligent household appliance device can be connected to an electronic device to realize remote control and management of the intelligent household appliance device by the user.

[0036] In the disclosed embodiments, a terminal device refers to an electronic device with a wireless connection function. The terminal device can be communicatively connected to the intelligent household appliance device as described above by connecting to the Internet, or can also be communicatively connected to the intelligent household appliance device as described above directly through Bluetooth, Wi-Fi, etc. In some embodiments, the terminal device is, for example, a mobile device, a computer, or an in-vehicle device built in a hover car, etc., or any combination thereof. The mobile device can, for example, include a mobile phone, a smart home device, a wearable device, a smart mobile device, a virtual reality device, etc., or any combination thereof, wherein the wearable device includes, for example: a smart watch, a smart bracelet, a pedometer, etc.

[0037] In the embodiments of the present disclosure, an air conditioner is configured with a microphone and a speaker, and the microphone is used to collect the noise when the air conditioner components are operating.

[0038] Combined Figure 1 As shown, the embodiments of the present disclosure provide a noise reduction control method for an air conditioner, including:

[0039] S01, when the air conditioner is operating, the air conditioner obtains a noise signal through the microphone and obtains a speaker frequency response through the speaker.

[0040] S02, the air conditioner analyzes the noise signal to determine the noise spectrum and an initial speaker frequency domain signal that is out of phase with the noise spectrum.

[0041] S03, the air conditioner adjusts the gain of the initial speaker frequency domain signal based on the active noise reduction technology and the speaker frequency domain response to obtain a target speaker frequency domain signal.

[0042] S04, the air conditioner outputs a speaker time domain signal corresponding to the target speaker frequency domain signal through the speaker.

[0043] By using the noise reduction control method for an air conditioner provided in the embodiments of the present disclosure, when the air conditioner is running, it first obtains a noise signal through a microphone and obtains a speaker frequency response through a speaker. Then, the noise signal is analyzed to determine the noise spectrum and an initial speaker frequency domain signal that is out of phase with the noise spectrum. The air conditioner then adjusts the gain of the initial speaker frequency domain signal based on the active noise reduction technology and the speaker frequency response to obtain a target speaker frequency domain signal that is adapted to the gain of the noise spectrum. Finally, the air conditioner outputs the speaker time domain signal corresponding to the target speaker frequency domain signal through the speaker. The embodiments of the present disclosure take into account the influence of the speaker response characteristics on the initial speaker time domain signal. By combining the speaker frequency response and the active noise reduction technology to adjust the gain of the initial speaker frequency domain signal, a speaker time domain signal that can cancel and interfere with the noise signal can be generated, thereby improving the noise reduction effect on the noise of the air conditioner itself.

[0044] Optionally, in combination with Figure 2 As shown, the air conditioner adjusts the gain of the initial speaker frequency domain signal based on the active noise reduction technology and the speaker frequency response to obtain a target speaker frequency domain signal, including:

[0045] S11, the air conditioner determines the noise energy according to the noise spectrum.

[0046] In this step, the air conditioner determines the noise energy according to the noise spectrum, including: the air conditioner determines to determine the noise energy P n (f). Wherein, X(f,t) represents the noise frequency at time t, and T represents the duration of the set time period.

[0047] S12, the air conditioner determines the target frequency gain according to the noise energy and the speaker frequency response.

[0048] S13, the air conditioner obtains the target speaker frequency domain signal according to the product of the initial speaker frequency domain signal and the target frequency gain.

[0049] In this way, during the noise reduction process, the noise energy is not constant. Therefore, it is necessary to dynamically adjust the gain of the speaker frequency domain signal according to the change of the noise energy. Based on this, the air conditioner first determines the noise energy based on the noise frequency, and then determines the target frequency gain according to the noise energy and the speaker frequency response. Finally, the air conditioner multiplies the initial speaker frequency domain signal and the target frequency gain to obtain the target speaker frequency domain signal. The embodiments of the present disclosure can dynamically adjust the initial speaker frequency domain signal by measuring the noise energy generated by the air conditioner itself, and can generate a speaker time domain signal that can cancel and interfere with the noise signal, thereby improving the noise reduction effect on the noise of the air conditioner itself.

[0050] Optionally, in combination with Figure 3As shown in the figure, the air conditioner determines the target frequency gain according to the noise energy and the speaker frequency response, including:

[0051] S21, the air conditioner determines the initial frequency gain and the correction gain according to the noise energy and the speaker frequency response.

[0052] S22, the air conditioner corrects the initial frequency gain according to the correction gain to determine the target frequency gain.

[0053] In this way, the embodiments of the present disclosure can dynamically adjust the gain of the speaker frequency domain signal by measuring the noise energy generated by the air conditioner itself and combining the frequency domain response characteristics of the speaker, so as to realize the dynamic adjustment of the initial speaker frequency domain signal gain, and can generate a speaker time domain signal that can cancel and interfere with the noise signal, further improving the noise reduction effect of the air conditioner itself.

[0054] Optionally, the air conditioner determines the correction gain in the following manner:

[0055] Optionally, the air conditioner determines the initial correction gain according to the sum of α·P n (f) and β.

[0056] In this step, the initial correction gain Gain(f) = α·P n (f) + β.

[0057] The air conditioner determines the correction gain according to the initial correction gain and the speaker frequency response.

[0058] Wherein, P n (f) represents the noise energy, α and β respectively represent the first coefficient and the second coefficient, the initial correction gain is positively correlated with the correction gain, and the speaker frequency response is negatively correlated with the correction gain.

[0059] In this way, when the noise energy is large, it is necessary to appropriately increase the initial correction gain to enhance the noise cancellation effect. When the noise energy is small, the initial correction gain can be appropriately reduced to avoid generating new noise due to overcompensation. Based on this, the embodiments of the present disclosure can calculate the initial correction gain through the sum of α·P n (f) and β. In addition, the response characteristics of different speakers in different frequency bands are different, usually showing that the speaker response is poor in the high frequency band, while the speaker response is strong in the low frequency band. Therefore, the embodiments of the present disclosure need to compensate the initial correction gain according to the speaker frequency response when adjusting the initial frequency gain.

[0060] It should be noted that α and β can be determined according to the model of the air conditioner and / or the spatial characteristics of the space where the air conditioner is located, and the embodiments of the present disclosure may not make specific limitations thereto. As an example, α > 0. As another example, α > 0, β ≥ 0.

[0061] Optionally, the air conditioner determines a correction gain according to an initial correction gain and a speaker frequency response, including:

[0062] The air conditioner obtains the current speaker frequency response at the current frequency.

[0063] When the current speaker frequency response is in the high-frequency band, the air conditioner determines the product of the initial correction gain and a third coefficient as the correction gain.

[0064] When the current speaker frequency response is in the low-frequency band, the air conditioner determines the product of the initial correction gain and a fourth coefficient as the correction gain.

[0065] Wherein, the third coefficient is greater than the fourth coefficient and the fourth coefficient is greater than 1.

[0066] In this way, since the response characteristics of different speakers are different in different frequency bands, usually the speaker response is poor in the high-frequency band while the speaker response is strong in the low-frequency band. Therefore, when the current speaker frequency response is in the high-frequency band, the air conditioner determines the product of the larger third coefficient and the initial correction gain as the correction gain to appropriately increase the initial correction gain, thereby enhancing the noise cancellation effect. When the current speaker frequency response is in the low-frequency band, the air conditioner determines the product of the smaller fourth coefficient and the initial correction gain as the correction gain to appropriately reduce the initial correction gain, so as to avoid overcompensation and generate new noise.

[0067] Optionally, the third coefficient is the reciprocal of the current speaker frequency response, and / or the fourth coefficient is the reciprocal of the current speaker frequency response.

[0068] Optionally, as shown in Figure 4 The air conditioner analyzes the noise signal and determines the noise spectrum and the initial speaker frequency domain signal that is inverse to the noise spectrum, including:

[0069] S31, the air conditioner performs adaptive filtering processing on the noise signal based on an adaptive filtering algorithm to obtain the noise frequency and noise amplitude of the noise signal.

[0070] S32, the air conditioner generates an initial speaker signal according to the noise frequency and noise amplitude, wherein the initial speaker signal is a sound wave signal with the same amplitude value as the noise signal and the opposite phase.

[0071] In this way, the air conditioner performs adaptive filtering processing on the noise signal based on the adaptive filtering algorithm to obtain the noise frequency and noise amplitude of the noise signal. Then, the air conditioner generates an initial speaker signal according to the noise frequency and noise amplitude. By using the adaptive filtering algorithm, a sound wave signal with the same amplitude value as the noise signal and the opposite phase can be generated.

[0072] In a specific example, the adaptive filtering algorithm is LMS (Least Mean Squares) or RLS (Recursive Least Squares).

[0073] Optionally, after the air conditioner outputs the speaker time-domain signal corresponding to the target speaker frequency-domain signal through the speaker, it further includes: the air conditioner performs spectrum analysis on the noise signal to obtain the latest noise frequency-domain signal. The air conditioner adjusts the speaker time-domain signal based on the latest noise frequency-domain signal. Among them, the air conditioner adjusts the speaker time-domain signal based on the latest noise frequency-domain signal, including: the air conditioner adjusts the speaker amplitude and speaker phase of the speaker time-domain signal based on PID (Proportional-Integral-Derivative) and the noise amplitude and noise phase of the latest noise frequency-domain signal. In this way, the speaker amplitude and speaker phase of the finally output speaker time-domain signal can be further optimized to ensure the noise cancellation effect and stability.

[0074] In practical applications, α = 0.05 and β = 1, and the correction gain Gain final (f) is calculated as follows:

[0075] Among them, both the third coefficient and the fourth coefficient are the reciprocals of H(f).

[0076] Among them, H(f) represents the current speaker frequency response of the speaker at frequency f.

[0077] Table 1 Noise energy and speaker frequency response at different frequencies

[0078]

[0079] Table 2 Correction gain at different frequencies

[0080]

[0081] Combined with Table 1 and Table 2 shown above, taking frequencies 100Hz and 2000Hz as examples, the noise energy P n (f) is 50dB at 100Hz, and the noise energy P n (f) is 80dB at 2000Hz. Based on 0.05P n (f) + 1, it is calculated and determined that the initial correction gain Gain(f) is 3.5 at 100Hz and the initial correction gain Gain(f) is 5 at 2000Hz. After adjusting the initial correction gain, the correction gain at 100Hz is approximately 3.89 and the correction gain at 2000Hz is approximately 8.33.

[0082] Combined with Figure 5As shown in the figure, an embodiment of the present disclosure provides a noise reduction control device 70 for an air conditioner, including a processor 700 and a memory 701. Optionally, the device 70 may further include a communication interface 702 and a bus 703. Among them, the processor 700, the communication interface 702, and the memory 701 can complete mutual communication through the bus 703. The communication interface 702 can be used for information transmission. The processor 700 can call the logical instructions in the memory 701 to execute the noise reduction control method for the air conditioner in the above embodiment.

[0083] In addition, when the logical instructions in the above-mentioned memory 701 are implemented in the form of a software functional unit and sold or used as an independent product, they can be stored in a computer-readable storage medium.

[0084] The memory 701, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as the program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 700 executes functional applications and data processing by running the program instructions / modules stored in the memory 701, that is, implements the noise reduction control method for the air conditioner in the above embodiment.

[0085] The memory 701 may include a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store data created according to the use of the terminal device, etc. In addition, the memory 701 may include a high-speed random access memory and may also include a non-volatile memory.

[0086] Combined with Figure 6 As shown in the figure, an embodiment of the present disclosure provides an air conditioner 100, including: an air conditioner body, and the above-mentioned noise reduction control device 70 for the air conditioner. The noise reduction control device 70 for the air conditioner is installed on the product body. The installation relationship described here is not limited to being placed inside the air conditioner body, but also includes installation connections with other components of the air conditioner 100, including but not limited to physical connections, electrical connections, or signal transmission connections, etc. Those skilled in the art can understand that the noise reduction control device 70 for the air conditioner can be adapted to a feasible air conditioner body, and thus other feasible embodiments can be realized.

[0087] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, and the computer-executable instructions are set to execute the above-mentioned noise reduction control method for the air conditioner.

[0088] The technical solution of the embodiments of the present disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiments of the present disclosure. The aforementioned storage medium may be a non-transitory storage medium, such as: a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or an optical disc, etc., which are various media that can store program codes.

[0089] The above description and the drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process, and other changes. Embodiments merely represent possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations can vary. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. Moreover, the terms used in this application are only for describing the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to also include the plural forms. Similarly, as used in this application, the term "and / or" refers to any and all possible combinations including one or more of the associated listed items. Additionally, when used in this application, the term "comprise" and its variants "comprises" and / or "comprising" etc. mean the presence of the stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or groupings of these. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, or device including the element. In this article, what each embodiment focuses on can be the differences from other embodiments, and the same or similar parts among the various embodiments can be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, the relevant parts can refer to the description of the method part.

[0090] Those skilled in the art will realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner can depend on the specific application and design constraints of the technical solution. The skilled person can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of the embodiments of the present disclosure. The skilled person can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0091] In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units can be merely a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Additionally, the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms. The units described as separate components can be or can not be physically separated, and the components displayed as units can be or can not be physical units, that is, they can be located in one place or can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to implement this embodiment. Additionally, in the embodiments of the present disclosure, the various functional units can be integrated in one processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0092] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, a segment of code, or a part thereof, which contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions noted in the blocks may occur in a different order than noted in the accompanying drawings. For example, two consecutive blocks may in fact be executed substantially in parallel, or they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may in fact be executed substantially in parallel, or they may sometimes be executed in reverse order, depending on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A noise reduction control method for an air conditioner, characterized in that, The air conditioner is configured with a microphone and a speaker. The microphone is used to collect the noise generated during the operation of the air conditioner components, including: When the air conditioner is operating, obtaining a noise signal through the microphone and obtaining the speaker frequency response through the speaker; Analyzing the noise signal to determine the noise spectrum and the initial speaker frequency domain signal that is out of phase with the noise spectrum; Adjusting the gain of the initial speaker frequency domain signal based on the active noise reduction technology and the speaker frequency response to obtain the target speaker frequency domain signal; Outputting the speaker time domain signal corresponding to the target speaker frequency domain signal through the speaker.

2. The method according to claim 1, wherein Adjusting the gain of the initial speaker frequency domain signal based on the active noise reduction technology and the speaker frequency response to obtain the target speaker frequency domain signal, including: Determining the noise energy according to the noise spectrum; Determining the target frequency gain according to the noise energy and the speaker frequency response; Obtaining the target speaker frequency domain signal according to the product of the initial speaker frequency domain signal and the target frequency gain.

3. The method according to claim 2, characterized in that, Determining the target frequency gain according to the noise energy and the speaker frequency response, including: Determining the initial frequency gain and the correction gain according to the noise energy and the speaker frequency response; Correcting the initial frequency gain according to the correction gain to determine the target frequency gain.

4. The method according to claim 3, characterized in that, Determining the correction gain in the following manner: According to the sum of α·P n (f) and β, determine the initial correction gain; Determining the correction gain according to the initial correction gain and the speaker frequency response; Among them, P n (f) represents the noise energy, α and β respectively represent the first coefficient and the second coefficient, the initial correction gain is positively correlated with the correction gain, and the speaker frequency response is negatively correlated with the correction gain.

5. The method according to claim 4, wherein Determining the correction gain according to the initial correction gain and the speaker frequency response, including: Obtaining the current speaker frequency response at the current frequency; When the current speaker frequency response is in the high-frequency band, determining the product of the initial correction gain and the third coefficient as the correction gain; When the current speaker frequency response is in the low-frequency band, determining the product of the initial correction gain and the fourth coefficient as the correction gain; Wherein, the third coefficient is greater than the fourth coefficient and the fourth coefficient is greater than 1.

6. The method according to claim 5, wherein The third coefficient is the reciprocal of the current speaker frequency response, and / or, the fourth coefficient is the reciprocal of the current speaker frequency response.

7. The method according to any one of claims 1 to 6, characterized in that, Analyzing the noise signal to determine the noise spectrum and the initial speaker frequency domain signal that is out of phase with the noise spectrum, including: Performing adaptive filtering processing on the noise signal based on an adaptive filtering algorithm to obtain the noise frequency and noise amplitude of the noise signal; Generating an initial speaker signal according to the noise frequency and noise amplitude, wherein the initial speaker signal is a sound wave signal with an amplitude value equal to that of the noise signal and a phase opposite thereto.

8. A noise reduction control device for an air conditioner, comprising a processor and a memory storing program instructions, characterized in that, The processor is configured to execute the noise reduction control method for an air conditioner according to any one of claims 1 to 7 when running the program instructions.

9. An air conditioner, characterized in that, Including: An air conditioner body, the air conditioner body includes a microphone and a speaker, and the microphone is used to collect the noise generated during the operation of the air conditioner components; The noise reduction control device for an air conditioner according to claim 8, which is installed on the air conditioner body.

10. A computer-readable storage medium storing program instructions, characterized in that, When running, the program instructions are used to cause a computer to execute the noise reduction control method for an air conditioner according to any one of claims 1 to 7.

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