Sound equipment adaptive regulation and control method and system based on environmental noise characteristics

Abstract

The invention relates to the technical field of sound box regulation and control, in particular to a sound box self-adaptive regulation and control method and system based on environmental noise characteristics. The method comprises the following steps: acquiring and analyzing a plurality of pieces of real-time environment sound information, and determining a plurality of pieces of sound signal information; analyzing the plurality of pieces of sound signal information, determining a plurality of pieces of noise information, and determining a plurality of frequency band noise features in combination with preset frequency band information; audience distribution information and sound distribution information are obtained and analyzed, and a preliminary adjustment strategy is determined; based on the preliminary adjustment strategy, determining an adaptive dynamic adjustment strategy according to the plurality of frequency band noise characteristics; and according to the adaptive dynamic adjustment strategy, adaptive dynamic adjustment is carried out on the sound equipment. The determination of the preliminary adjustment strategy can provide good preliminary hearing experience for the audience. Through adaptive adjustment, the sound system can be quickly and effectively adjusted in a complex and variable noise environment, interference of noise on sound effects is reduced, and the best hearing experience is brought to audiences.

Description

Technical Field

[0001] The present application relates to the technical field of sound control, and in particular to a sound adaptive control method and system based on environmental noise characteristics. Background Art

[0002] During outdoor performances, an adaptive sound control technology based on the characteristics of ambient noise is particularly important. This technology analyzes the spectrum characteristics of ambient noise in real time and automatically adjusts the output of the sound system accordingly to ensure that the clarity and quality of the performance sound are not affected by ambient noise.

[0003] During outdoor performances, due to the complexity and variability of environmental noise, the output effect of the sound system will be interfered by noise. The existing technology has defects in the accuracy of noise recognition, and it is difficult to ensure the coordination of the output sound effects of the sound system with the environment and the audience, which in turn affects the performance effect and the audience's listening experience. Summary of the invention

[0004] The present application provides a method and system for adaptively controlling sound based on environmental noise characteristics to solve the above-mentioned technical problems.

[0005] In a first aspect, the present application provides a method for adaptively controlling sound based on environmental noise characteristics, the method comprising: Acquire some real-time environmental sound information, and determine some sound signal information according to some of the real-time environmental sound information; Analyze some of the sound signal information to determine some noise information, analyze some of the noise information and preset frequency band information to determine some frequency band noise characteristics; Acquiring audience distribution information and sound distribution information, and determining a preliminary adjustment strategy according to the audience distribution information and the sound distribution information; Based on the preliminary adjustment strategy, according to the noise characteristics of the frequency bands, determining an adaptive dynamic adjustment strategy; According to the adaptive dynamic adjustment strategy, the sound system is adaptively and dynamically adjusted.

[0006] Optionally, analyzing the plurality of sound signal information to determine the plurality of noise information includes: According to the current sound signal information, determine the sound frequency domain characteristic information; according to the sound frequency domain characteristic information, determine the sound spectrum structure; according to the sound spectrum structure, determine the lowest frequency peak; according to the lowest frequency peak, determine the fundamental frequency information; according to the fundamental frequency information and the sound spectrum structure, determine the fundamental frequency integer multiple information; obtain the reference signal characteristics, and determine the harmonic information according to the fundamental frequency integer multiple information and the reference signal characteristics; according to the fundamental frequency information and the harmonic information, screen the sound spectrum structure under each of the sound signal information to determine a number of noise information.

[0007] Optionally, the analyzing the noise information and the preset frequency band information to determine the noise characteristics of the frequency bands includes: According to the current noise information, determine the noise spectrum structure; according to the noise spectrum structure and the preset frequency band information, divide the noise signal to determine several frequency band spectrum structures; according to the several frequency band spectrum structures under each noise information, determine several frequency band noise characteristics.

[0008] Optionally, determining a preliminary adjustment strategy according to the audience distribution information and the sound distribution information includes: Determine audience density information based on the audience distribution information; determine relative position information of audience and audio based on the audience distribution information and the audio distribution information; determine initial frequency adjustment information based on the relative position information and the audience density information; determine initial volume adjustment information based on the relative position information and a preset sound pressure level range; determine the initial frequency adjustment information and the initial volume adjustment information as the preliminary adjustment strategy.

[0009] Optionally, determining the initial frequency adjustment information according to the relative position information and the audience density information includes: According to the audience distribution information, the number of audience distribution areas is determined; according to the sound distribution information, the number of sound distributions is determined; according to the relative position information, the relative distance is determined; according to the preset basic output frequency, the preset adjustment frequency set, the number of audience distribution areas, the number of sound distributions and the relative distance, a loss function minimum value model is established to determine the loss value set, which is specifically the following loss function minimum value model: ; in, is the set of loss values, is the number of areas where the audience is distributed, is the number of sound distributions, is the current adjustment frequency of the preset adjustment frequency set, It is the preset basic output frequency of each speaker, is the relative distance between each speaker and each audience area; the current adjustment frequency corresponding to the minimum value in the loss value set is determined as the initial adjustment frequency of the current speaker; and the initial frequency adjustment information is determined according to a plurality of the initial adjustment frequencies and the preset basic output frequency.

[0010] Optionally, determining the initial volume adjustment information according to the relative position information, the audience density information and a preset optimal volume effect includes: According to the relative position information, several audience area positions are determined; the sound placement point information is obtained, and according to the sound placement point information, several sound positions and several sound starting sound pressure levels are determined; according to several of the initial adjustment frequencies, the audience area positions, the sound positions and the sound starting sound pressure levels, the current sound pressure level of each sound in any audience area is determined, which is specifically the following formula: ; in, It is The speaker is in the current sound pressure level in the audience area, is the starting sound pressure level of the sound, is the audience area location, is the speaker position, is the preset air attenuation influence coefficient, is the relative distance, is the initial adjustment frequency of several speakers; according to several current sound pressure levels, the sound pressure level of each speaker in the current audience area is superimposed to determine the superimposed sound pressure level; according to the superimposed sound pressure level of each audience area and the preset sound pressure level range, the initial adjustment sound pressure level is determined; according to the initial adjustment sound pressure level and the starting sound pressure level of the speaker, the initial volume adjustment information is determined.

[0011] Optionally, the determining, based on the preliminary adjustment strategy and according to the noise characteristics of the frequency bands, an adaptive dynamic adjustment strategy includes: According to the noise characteristics of several frequency bands, determine the sound pressure levels of several frequency bands and the number of frequency bands; according to the sound pressure levels of several frequency bands and the preset reference sound pressure, determine the linear sound pressure of several frequency bands; according to the linear sound pressure of several frequency bands, superimpose the linear sound pressures of several frequency bands to determine the total linear sound pressure; based on the preliminary adjustment strategy, determine the adaptive dynamic adjustment strategy according to the total linear sound pressure.

[0012] Optionally, the determining the adaptive dynamic adjustment strategy based on the preliminary adjustment strategy and according to the total linear sound pressure includes: According to the noise characteristics of several frequency bands, the average frequencies and stable environmental noise characteristics of several frequency bands are determined; according to the several average frequencies, the linear sound pressures of the noise of several frequency bands are weighted to determine several weighted linear sound pressures; according to the several weighted linear sound pressures, the weighted total linear sound pressure is determined; according to the stable environmental noise characteristics and the preset analysis time, the weighted environmental noise sound pressure is determined; according to the weighted total linear sound pressure and the environmental noise sound pressure, the weighted human voice noise sound pressure is determined; according to the weighted human voice noise sound pressure, the preset reference sound pressure and the preset analysis time, the noisy degree is determined, which is specifically the following formula: ; in, is the noise level, is the preset analysis duration, Indicates the current analysis time point. At the current analysis time point Next The weighted human voice noise sound pressure in the frequency band, is the preset reference sound pressure, is the number of frequency bands; and according to the noise level, the adaptive dynamic adjustment strategy is determined.

[0013] Optionally, determining the adaptive dynamic adjustment strategy according to the noise level includes: According to the weighted ambient noise sound pressure, a stable ambient noise level is determined; according to the stable ambient noise level, the noisiness level and the initial volume adjustment information, a volume adjustment target value of each speaker is determined, which is specifically the following formula: ; in, is the target volume adjustment value of the current speaker, is the initial adjustment sound pressure level of the current speaker, is the noise level, is the stable ambient noise level, is the preset environmental noise impact coefficient, is a preset noisy human voice influence coefficient; according to the stable ambient noise level, the noisy degree and the initial frequency adjustment information, the frequency adjustment target value of each speaker is determined, specifically as follows: ; in, is the frequency adjustment target value of the current audio system, is the initial adjustment frequency of the current speaker, is the noise level, is the stable ambient noise level, is the preset gain factor adjustment constant, It is the preset noisy voice influence weight. The stable environment impact weight is preset; the volume adjustment target value and the frequency adjustment target value are determined as the adaptive dynamic adjustment strategy.

[0014] In a second aspect, the present application provides an adaptive sound control system based on environmental noise characteristics, the system comprising: A sound collection module is used to obtain some real-time environmental sound information and determine some sound signal information according to some real-time environmental sound information; A noise extraction module, used to analyze the sound signal information to determine the noise information, analyze the noise information and the preset frequency band information to determine the noise characteristics of the frequency bands; A preliminary strategy determination module, used to obtain audience distribution information and sound distribution information, and determine a preliminary adjustment strategy according to the audience distribution information and the sound distribution information; The dynamic strategy determination module is used to determine an adaptive dynamic adjustment strategy based on the preliminary adjustment strategy and according to the noise characteristics of the several frequency bands. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 A schematic diagram of an application scenario provided for an embodiment of the present application; Figure 2 A flowchart of a method for adaptively controlling sound based on environmental noise characteristics provided in one embodiment of the present application; Figure 3 A schematic diagram of the structure of an adaptive sound control system based on environmental noise characteristics provided in one embodiment of the present application. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0018] In addition, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally means that the associated objects before and after are in an "or" relationship.

[0019] The embodiments of the present application are further described in detail below in conjunction with the drawings in the specification.

[0020] During outdoor performances, due to the complexity and variability of environmental noise, the output effect of the sound system will be interfered by noise. The existing technology has defects in the accuracy of noise recognition, and it is difficult to ensure the coordination of the output sound effects of the sound system with the environment and the audience, which in turn affects the performance effect and the audience's viewing experience.

[0021] Based on this, the present application provides a method and system for adaptively controlling sound based on environmental noise characteristics, which obtains a number of real-time environmental sound information, separates the noise and performance sound therein, obtains audience distribution information and sound distribution information, and considers that each sound will have sound superposition on each audience area and the influence of attenuation during sound propagation, and then determines the initial frequency adjustment information and the initial volume adjustment information, makes initial adjustments to the sound before the performance begins, and on this basis, analyzes the influence of noise in different frequency bands, obtains an adaptive dynamic adjustment strategy, and then makes adaptive dynamic adjustments to the sound during the performance. The determination of the preliminary adjustment strategy can provide the audience with a good initial listening experience and provide an initial adjustment framework for subsequent adaptive dynamic adjustments. Adaptive adjustment allows the sound system to make quick and effective adjustments when facing complex and changeable noise environments, reduce the interference of noise on sound effects, and bring the best viewing experience to the audience.

[0022] Figure 1 A schematic diagram of an application scenario provided for the present application. When performing outdoor performances, the method provided by the present application is applied to analyze the noise in the performance environment, determine the preliminary adjustment strategy and the adaptive dynamic adjustment strategy, and make corresponding adjustments to the audio based on the above two adjustment strategies.

[0023] Specifically, the method provided in the present application is applied to any server, and the server communicates with the audio, sound sensor and monitoring equipment. The server obtains the real-time environmental sound information provided by the sound sensor and the audio distribution information and audience distribution information provided by the monitoring equipment, analyzes the above information, determines the preliminary adjustment strategy and the adaptive dynamic adjustment strategy, and then makes initial adjustments to the audio before the performance based on the preliminary adjustment strategy, and makes dynamic adjustments to the audio during the performance based on the adaptive dynamic adjustment strategy. The determination of the preliminary adjustment strategy can provide the audience with a good initial listening experience and provide an initial adjustment framework for subsequent adaptive dynamic adjustments. Adaptive adjustment allows the audio system to make quick and effective adjustments when facing complex and changeable noise environments, reduce the interference of noise on sound effects, and bring the best viewing experience to the audience. The specific implementation method can refer to the following embodiments.

[0024] Figure 2 This is a flowchart of a method for adaptively controlling sound based on environmental noise characteristics provided in an embodiment of the present application. The method of this embodiment can be applied to the server in the above scenario. Figure 2 As shown, the method includes: S201. Acquire some real-time environmental sound information, and determine some sound signal information according to the some real-time environmental sound information.

[0025] The real-time environmental sound information may be real-time sound information of the audience area detected by a number of sound sensors distributed in the audience area, including acoustic sound, natural environmental sound, audience sound, etc.

[0026] The sound signal information may be digital signal information obtained by preprocessing the collected real-time environmental sound information.

[0027] Specifically, when performing outdoor performances, before analyzing and adjusting the sound signals, the detected sound information needs to be preprocessed to obtain sound digital signals to provide a prerequisite for analysis. Therefore, several small sound sensors are hidden and distributed in the center of each audience area, with one sensor in each area to detect the sound information of the current area. The signals collected in each area are converted through ADC (analog-to-digital conversion) to obtain several digital sound signals, and low-pass filtering technology is used to remove abnormal high-frequency signals (such as electromagnetic interference) in the signals, and finally several sound signal information is obtained.

[0028] S202: Analyze some sound signal information to determine some noise information, analyze some noise information and preset frequency band information to determine some frequency band noise characteristics.

[0029] The noise information may be a noise sound signal in the sound signal that affects the audience's hearing.

[0030] The preset frequency band information may be a plurality of frequency range information preset for dividing the sound signal into a plurality of frequency bands.

[0031] The frequency band noise characteristics may be related characteristics of the noise in the current frequency band, including but not limited to noise frequency, noise energy, and spectrum structure.

[0032] Specifically, during outdoor performances, noise will affect the audience's hearing, and different types of noise will have different degrees of impact on the sound effects. In order to more effectively and specifically reduce the impact of noise in a specific frequency band on the audience's hearing, it is necessary to determine the noise characteristics in different frequency bands. Therefore, the frequency domain characteristics of several sound signals are obtained by Fourier transforming the detected sound signals, and the noise information is determined by using harmonic analysis technology. Each sound signal is divided by preset frequency band information to determine the characteristics of the noise information in several different frequency bands.

[0033] S203: Obtain audience distribution information and sound distribution information, and determine a preliminary adjustment strategy based on the audience distribution information and sound distribution information.

[0034] The audience distribution information may be information about the audience distribution areas in the current performance scene.

[0035] The sound distribution information may be information about the sound distribution in the current performance scene.

[0036] The preliminary adjustment strategy may be a preliminary sound adjustment strategy determined before the performance begins.

[0037] Specifically, during outdoor performances, before the performance begins, noise has little effect on the initial adjustment parameters of the sound system. At this time, the audience distribution and the adjustment of the sound system parameters will significantly affect the sound effects, and initial adjustments to the sound system are required to provide the audience with a good listening experience. Therefore, the audience distribution information and the sound system distribution information are obtained through monitoring equipment, and the preliminary volume and frequency adjustment information of the sound system is obtained through mathematical analysis based on the distribution characteristics, and then the preliminary volume and frequency adjustment information is determined as a preliminary adjustment strategy.

[0038] S204: Based on the preliminary adjustment strategy and according to noise characteristics of several frequency bands, determine an adaptive dynamic adjustment strategy.

[0039] The adaptive dynamic adjustment strategy may be a strategy for adaptively adjusting the sound system according to the specific noise under the influence of the noise.

[0040] Specifically, during outdoor performances, due to the complexity and variability of noise in the performance environment, by analyzing the noise characteristics of several frequency bands, we can more comprehensively analyze the different degrees of impact of noise in different frequency bands on audiences in different areas. Therefore, we can analyze the changes in sound signals in real time, analyze the specific impact of noise characteristics in several frequency bands on the audience's listening experience, and determine an adaptive dynamic adjustment strategy based on the preliminary adjustment strategy.

[0041] S205: Adaptively and dynamically adjust the audio system according to the adaptive dynamic adjustment strategy.

[0042] Specifically, in the scenario of outdoor performances, during the performance, the sound system must be adjusted in time according to noise changes to provide the audience with the best listening experience. Therefore, according to the obtained adaptive dynamic adjustment strategy, the sound system is adjusted through an audio equalizer on the basis of the preliminary adjustment strategy.

[0043] Through the method provided in this embodiment, the sound information of the audience area is collected in real time and preprocessed, so that the sound changes of the entire performance environment can be monitored in real time, providing raw data for subsequent analysis and processing. The collected sound signal is analyzed in the frequency domain to identify the noise information. Through Fourier transform and harmonic analysis, it is possible to identify which noise has a negative impact on the sound effects and audience experience, and separate useful signals from interference signals. The determination of the preliminary adjustment strategy can provide the audience with a preliminary listening experience and provide an initial adjustment framework for subsequent adaptive dynamic adjustment. Adaptive adjustment allows the sound system to make quick and effective adjustments in the face of complex and changeable noise environments, reduce the interference of noise on sound effects, and bring the best listening experience to the audience.

[0044] In some embodiments, sound frequency domain characteristic information is determined based on current sound signal information; sound frequency spectrum structure is determined based on sound frequency domain characteristic information; minimum frequency peak is determined based on sound frequency spectrum structure; fundamental frequency information is determined based on minimum frequency peak; fundamental frequency integer multiple information is determined based on fundamental frequency information and sound frequency spectrum structure; reference signal characteristics are obtained, and harmonic information is determined based on fundamental frequency integer multiple information and reference signal characteristics; sound frequency spectrum structure under each sound signal information is screened based on fundamental frequency information and harmonic information to determine a number of noise information.

[0045] The sound frequency domain characteristic information may be characteristic information of the sound signal in the frequency domain.

[0046] The sound spectrum structure can be the spectrum distribution structure of the sound signal in the frequency domain. The horizontal axis of the spectrum graph represents frequency, and the vertical axis represents energy.

[0047] The lowest frequency peak may be the lowest energy peak frequency detected in the current sound signal.

[0048] The fundamental frequency information may be the periodic lowest frequency peak of the spectrum in the current sound signal.

[0049] The fundamental frequency integer multiple information may be information of each integer multiple frequency of the fundamental frequency.

[0050] The harmonic information may be frequency components of integer multiples of the fundamental frequency in the current sound signal in addition to the fundamental frequency.

[0051] The reference signal feature may be a signal feature used to help accurately identify which are integer multiple harmonics of the fundamental frequency. The reference signal feature contains the original music and human voice and is not affected by environmental noise because it is directly obtained from the device before the sound wave is emitted.

[0052] Specifically, during outdoor performances, the emotional fluctuations of the audience caused by the influence of the music rhythm may lead to screaming, cheering and other behaviors of the audience, and the noise of the natural environment (wind, etc.) may have different degrees of influence on the audience's hearing. It is necessary to separate the music signal from the noise signal in the sound signal, and then analyze the noise signal. Therefore, the sound digital signal obtained by detecting and converting the signal is determined by FFT (Fast Fourier Transform) to obtain the sound frequency domain characteristic signal, and the spectrum structure thereof is obtained. The spectrum structure is analyzed, and the vertical axis data in the spectrum structure is analyzed to determine the lowest energy peak value, which is determined as the lowest frequency peak value, and then the lowest frequency peak value with regularity and periodicity is determined, and determined as the fundamental frequency. According to the fundamental frequency and the sound spectrum structure, the frequency that has an integer multiple relationship with the fundamental frequency is determined, and is determined as the fundamental frequency integer multiple information. Then, the fundamental frequency integer multiple information is compared with the reference signal characteristics of the sound output, and some fundamental frequency integer multiples with accidental components are removed, and then the remaining fundamental frequency integer multiple information is determined as harmonic information. The sound spectrum structure under each sound signal information is screened through the fundamental frequency information and the harmonic information, and then a number of noise information is determined.

[0053] Through the method provided in this embodiment, in the process of analyzing the sound signal, the frequency domain characteristic signal of the sound is determined and the spectrum structure in the audio signal is extracted. This process helps us understand the distribution of the sound in the frequency domain and lays the foundation for subsequent analysis. The extracted fundamental frequency and its integer multiple frequency information are compared with the reference signal output by the audio system to remove accidental components. This process can effectively filter out noise that does not belong to normal music signals and reduce misjudgment. By analyzing the received sound signal, the music signal and the noise signal are separated. This is a basic step to realize noise analysis, which avoids the judgment and processing of music signal interference with noise and provides a prerequisite for subsequent noise analysis and processing.

[0054] In some embodiments, the noise spectrum structure is determined according to the current noise information; the noise signal is divided according to the noise spectrum structure and preset frequency band information to determine several frequency band spectrum structures; and several frequency band noise characteristics are determined according to the several frequency band spectrum structures under each noise information.

[0055] The noise spectrum structure may be a spectrum structure in an extracted noise signal.

[0056] The frequency spectrum structures of the plurality of frequency bands may be frequency spectrum structures of noise signals corresponding to different frequency bands.

[0057] Specifically, when performing outdoor performances, due to the complexity and variability of the performance environment, there will be noise in multiple frequency bands, which will have different degrees of noise impact on the audience's hearing. It is necessary to analyze and process the noise characteristics in different frequency ranges to achieve refined analysis of the noise. Therefore, the noise information obtained by analysis and screening is obtained to obtain the spectrum distribution structure of the current noise information. According to the preset frequency band information and the horizontal axis frequency information of the spectrum distribution structure, the current noise signal is divided to obtain noise signals in different frequency bands, and then the spectrum structure of the noise signal in different frequency bands is obtained. The noise in different frequency bands has different characteristics. For example, natural environment noise is generally low-frequency noise, and the noise caused by audience cheering or other behaviors is generally high-frequency noise. The spectrum structure of several frequency bands under each noise information is analyzed, and the characteristics therein are extracted to obtain the noise characteristics of several frequency bands.

[0058] Through the method provided in this embodiment, different frequency bands may correspond to different noise sources and propagation characteristics. By decomposing the noise signal into different frequency bands, different types of noise can be identified and processed more accurately. This plays an important role in subsequent noise reduction or audio optimization. By comprehensively analyzing the noise characteristics of each frequency band, the noise structure in the performance environment is systematically understood. This helps to optimize the performance sound system in practical applications, thereby improving the clarity of the performance sound effects and the audience's experience.

[0059] In some embodiments, audience density information is determined based on audience distribution information; relative position information of the audience and the audio system is determined based on the audience distribution information and the audio system distribution information; initial frequency adjustment information is determined based on the relative position information and the audience density information; initial volume adjustment information is determined based on the relative position information and a preset sound pressure level range; and the initial frequency adjustment information and initial volume adjustment information are determined as a preliminary adjustment strategy.

[0060] The audience density information may be the distribution density of audiences in each audience area.

[0061] The relative position information may be the relative position between the center point of the audience area and the sound system.

[0062] The initial frequency adjustment information may be a strategy for adjusting the sound frequency before the performance begins.

[0063] The initial volume adjustment information may be a strategy for adjusting the sound volume before the performance begins.

[0064] The preset sound pressure level range may be a preset sound pressure level range that can generally meet the hearing requirements of the audience.

[0065] Specifically, when performing outdoor performances, before the performance begins, considering that there is no noise influence, the audience distribution and the initial adjustment parameters of the sound system will directly affect the sound effect. For example, when the audience density is large, the dense audience increases the absorption of sound. Improper adjustment of the initial adjustment parameters of the sound system will cause the sound to gather in certain areas, while other areas will feel the sound is hollow or insufficient. Appropriate initial adjustment of the sound system is required to bring the audience a preliminary auditory experience. Therefore, the distribution density of the audience in each audience area is determined through the audience distribution information, and the relative position between the center point of the audience area and the sound system is determined based on the audience distribution information and the sound system distribution information. Then, in combination with the relative position information and the audience distribution density, the initial frequency adjustment information is determined through mathematical analysis. The historical audience hearing feedback data is analyzed through big data analysis to obtain a sound pressure level range that can generally meet the audience's hearing requirements. In combination with the relative position information, the initial volume adjustment information is determined through mathematical analysis, and the above initial frequency adjustment information and initial volume adjustment information are determined as the preliminary adjustment strategy.

[0066] Through the method provided in this embodiment, the initial sound output frequency is adjusted according to the audience distribution information and the sound position, ensuring that different audience areas can obtain balanced and clear sound performance, avoiding distortion or excessive frequency, thereby improving the overall sound quality. According to the audience distribution information and the sound position, the sound output volume is adjusted to ensure that the sound pressure level of the sound is balanced throughout the performance venue, avoiding certain areas from being too loud or too quiet, thereby ensuring that the audience can enjoy the appropriate volume at any position. The determination of the initial adjustment strategy provides an adjustment basis and a calculation basis for the determination of the subsequent adaptive dynamic adjustment strategy.

[0067] In some embodiments, the number of audience distribution areas is determined according to audience distribution information; the number of sound distribution areas is determined according to sound distribution information; the relative distance is determined according to relative position information; and a loss function minimum value model is established according to a preset basic output frequency, a preset adjustment frequency set, the number of audience distribution areas, the number of sound distribution areas and the relative distance to determine a loss value set, specifically the following loss function minimum value model (1): (1); in, is the set of loss values, is the number of audience distribution areas, is the number of speakers distributed, is the current adjustment frequency of the preset adjustment frequency set, It is The preset basic output frequency of each speaker, is the relative distance between each speaker and each audience area; the current adjustment frequency corresponding to the minimum value in the loss value set is determined as the initial adjustment frequency of the current speaker; and the initial frequency adjustment information is determined according to several initial adjustment frequencies and a preset basic output frequency.

[0068] The relative distance can be the distance between the sound system and the center point of the audience distribution area.

[0069] The preset basic frequency value may be a preset basic output frequency of each speaker when there is no audience.

[0070] The initial adjustment frequency may be the initial output frequency of each speaker after considering the audience density.

[0071] The loss value set can be a set of loss values ​​at each adjustment frequency calculated by a formula. It is used to measure the difference between the system output and the expected target. It can be obtained by analyzing the historical audio output frequency data through big data analysis and is set to 20 frequency values.

[0072] The preset adjustment frequency set may be a set of preset adjustment frequencies used to calculate an optimal output frequency.

[0073] Specifically, when performing outdoors, multiple speakers will be evenly arranged in the performance venue to ensure the performance effect. Multiple sound effects will act on the same audience area at the same time. Setting the initial output frequency can ensure that the audience in each area can receive clear and uniform sound. However, the audience distribution density in different areas is different, and the frequency requirements are also different. Therefore, according to the audience distribution information, the number of audience distribution areas is determined, and then according to the speaker distribution information, the number of speakers is determined. According to the relative position information, the ultrasonic ranging technology is used to measure the relative distance between each speaker and each audience area, and then the loss function minimum model (1) is designed to obtain the initial adjustment frequency: Substitute each frequency in the preset adjustment frequency set into the loss function minimum model for calculation, and obtain the loss value set of each speaker. By comparing each loss value in the loss value set, the minimum loss value is determined, and then the current adjustment frequency corresponding to the minimum loss value is determined. , the current frequency is adjusted Determine the initial adjustment frequency of the current speaker, and then obtain the initial adjustment frequency of each speaker. Used to indicate the The first speaker Signal strength in each area, signal strength and basic output frequency is proportional to, and increases with the square of the relative distance This indicates that the signal decays rapidly with increasing distance. The entire loss function minimum model is for all The square of the frequency error of each audience area is summed to measure the difference between the actual receiving frequency and the expected receiving frequency of each audience area, and the square form is used to ensure that the difference is always non-negative and amplify the impact of large differences. The initial adjustment frequency is the frequency value that needs to be output specifically, so the initial adjustment frequency is subtracted from the preset basic output frequency to calculate the difference between the two, and this difference is determined as the initial frequency adjustment information.

[0074] Through the method provided by this embodiment, by accurately calculating the distribution of audience areas and the relative positions of the speakers, it is ensured that the audience in each area can hear clear and moderate sound. By establishing a minimization function model to measure the difference between the actual receiving frequency and the expected receiving frequency of the audience area, the receiving frequency of each area can be made as close to the expected value as possible by adjusting the frequency configuration, thereby achieving the effect of uniform sound propagation. By adjusting the output frequency of the speakers in different areas, the signal attenuation caused by the distance is reduced, so that even audiences at a long distance can hear the best sound effect.

[0075] In some embodiments, the positions of several audience areas are determined according to the relative position information; the sound placement point information is obtained, and the positions of several sound instruments and the starting sound pressure levels of several sound instruments are determined according to the sound placement point information; the current sound pressure level of each sound instrument in any audience area is determined according to several initial adjustment frequencies, the positions of the audience areas, the sound instrument positions and the starting sound pressure levels of the sound instruments, which is specifically the following formula (2): (2); in, It is The speaker is in The current sound pressure level in the audience area, is the starting sound pressure level of the sound, is the audience area location, It's the sound position. is the preset air attenuation influence coefficient, is the relative distance, It is the initial adjustment frequency of several speakers; according to several current sound pressure levels, the sound pressure level of each speaker in the current audience area is superimposed to determine the superimposed sound pressure level; according to the superimposed sound pressure level of each audience area and the preset sound pressure level range, the initial adjustment sound pressure level is determined; according to the initial adjustment sound pressure level and the starting sound pressure level of the speaker, the initial volume adjustment information is determined.

[0076] The audience area position may be position information of a center point of each audience area relative to each speaker.

[0077] The sound position may be the origin position of a three-dimensional coordinate system established with the position of each sound as the origin.

[0078] The current sound pressure level may be the sound pressure level of the current sound system in the current audience area.

[0079] The superimposed sound pressure level may be the sound pressure level of each sound system in the current audience area superimposed.

[0080] The preset air attenuation influence coefficient may be a preset coefficient for controlling the influence of air propagation on the sound pressure level, and may be obtained by fitting historical air propagation distance and sound pressure level change data.

[0081] Specifically, when performing outdoor performances, multiple speakers will be evenly arranged in the performance venue to ensure the performance effect. Multiple sound effects will have an effect on the same audience area at the same time. Appropriate volume setting can improve the audience's auditory comfort and make it easier for them to immerse themselves in the performance atmosphere, thereby enhancing the overall listening experience. However, too high a volume will affect the audience's hearing and even hearing, and too low a volume will make it difficult for audiences in distant places to hear clearly. Therefore, the speaker placement point information is obtained through monitoring equipment to determine the placement positions of several speakers and the initial sound pressure levels of several speakers. A three-dimensional space coordinate system is established with the position of each speaker as the origin. Combined with the relative position information, the positions of several audience areas are obtained. Then, based on several initial adjustment frequencies, audience area positions, speaker positions and speaker initial sound pressure levels, the current sound pressure level of each speaker in any audience area is determined by designing mathematical formula (2). In the process of sound wave propagation, due to the diffusion of energy in three-dimensional space, the sound pressure level will decay with the increase of distance. The use of logarithmic function is due to the definition of sound pressure level and the influence of multiple factors such as geometric diffusion and absorption on sound waves during propagation. Represents the distance proportional term, indicating that the sound is from arrive The increase in distance determines the degree of attenuation of sound during propagation in space; in the formula, frequency It represents the quadratic effect of frequency on attenuation. This term exists because the absorption of high-frequency sound by air increases with the frequency during the propagation of sound waves. The square form is used to highlight the absorption of high-frequency sound, so the attenuation effect is proportional to the square of the frequency. Then, the current sound pressure level is superimposed on the sound pressure level of the current audience area to obtain the superimposed sound pressure level, and then the superimposed sound pressure level of each audience area is compared with the preset sound pressure level range to determine the initial volume adjustment information.

[0082] Through the method provided in this embodiment, by determining the appropriate placement of the speakers and the initial sound pressure level, combined with the corresponding mathematical formula (such as the attenuation formula of the sound pressure level), a reasonable volume distribution can be obtained in different audience areas. Doing so can ensure that no matter which area the audience is in, they can feel the appropriate volume, avoid discomfort caused by too high or too low volume, and improve the overall auditory comfort. Through the superimposed sound pressure level analysis of multiple speakers in the same area, it is possible to effectively avoid interference or superposition between different speakers that causes the volume in certain areas to be too high or too low. After comparing the superimposed sound pressure level with the preset sound pressure level range, adjustments can be made to ensure that the sound distribution in each audience area is more uniform. During the propagation of sound waves, the attenuation of different frequencies is different, especially the attenuation of high-frequency sounds is more obvious. By combining the square influence of the frequency, effective compensation is performed especially for high-frequency sounds, so that audiences in different areas can feel a balanced sound effect and avoid sound distortion or imbalance.

[0083] In some embodiments, based on the noise characteristics of several frequency bands, the sound pressure levels of several frequency bands noise and the number of frequency bands are determined; based on the noise sound pressure levels of several frequency bands noise and a preset reference sound pressure, the linear sound pressure of several frequency bands noise is determined; based on the linear sound pressure of several frequency bands noise, the linear sound pressure of several frequency bands noise is superimposed to determine the total linear sound pressure; based on the preliminary adjustment strategy, an adaptive dynamic adjustment strategy is determined according to the total linear sound pressure.

[0084] The noise sound pressure levels in several frequency bands may be the sound pressure levels of noise in different frequency bands.

[0085] The number of frequency bands is the number of frequency bands after the noise is divided according to the preset frequency band information.

[0086] The preset reference sound pressure can be a preset sound pressure value corresponding to the normal human ear just being able to detect the existence of 1kHz (kilohertz) sound under standard atmospheric pressure, that is, the audible threshold sound pressure of 1kHz sound. The international standard value is usually taken as 20 Pa.

[0087] The frequency band noise linear sound pressure may be the linear sound pressure under different noise frequency bands.

[0088] The total linear sound pressure may be the sound pressure obtained by superimposing the linear sound pressures of noises in several frequency bands.

[0089] Specifically, during outdoor performances, due to the complexity and variability of the performance environment, the audience in each area will be affected by different types of noise. For example, if the audience in the next area is more excited and screams and claps, it will cause noise impact on the audience in the current area. Therefore, according to the noise characteristics of several frequency bands, the spectrum analysis technology is used to measure the noise sound pressure level and the number of frequency bands in each frequency band. According to the noise characteristics of several frequency bands obtained above, the effective sound pressure value of the noise signal in each frequency band is detected, and the linear sound pressure of several frequency bands is obtained according to the sound pressure level calculation formula (that is, the ratio of the effective value of the sound pressure to be measured to the reference sound pressure is multiplied by 20 after taking the logarithm). Then, the linear sound pressure of several frequency bands of noise in the current audience area is superimposed to obtain the total linear sound pressure of the current area. Then, on the basis of the preliminary adjustment strategy, the adaptive dynamic adjustment strategy is determined according to the total linear sound pressure.

[0090] Through the method provided in this embodiment, the noise sound pressure level of each frequency band is calculated by a formula based on the effective sound pressure value and reference sound pressure of the frequency band noise, ensuring that the impact of the noise can be quantified. The quantified sound pressure level is the basis for subsequent adjustment strategies. Superimposing the linear sound pressure of noise in different frequency bands to obtain the total linear sound pressure in the current area can more comprehensively reflect the noise situation in the entire audience area. This superposition processing not only covers the impact of a single frequency band, but also takes into account the comprehensive effect of multi-band noise, ensuring a more accurate global assessment of the noise situation.

[0091] In some embodiments, according to the noise characteristics of several frequency bands, the average frequencies and stable environmental noise characteristics of several frequency bands are determined; according to the several average frequencies, the linear sound pressures of the noise of several frequency bands are weighted to determine several weighted linear sound pressures; according to the several weighted linear sound pressures, a weighted total linear sound pressure is determined; according to the stable environmental noise characteristics and a preset analysis time, a weighted environmental noise sound pressure is determined; according to the weighted total linear sound pressure and the environmental noise sound pressure, a weighted human voice noise sound pressure is determined; according to the weighted human voice noise sound pressure, a preset reference sound pressure and a preset analysis time, a noisy degree is determined, which is specifically the following formula (3): (3); in, is the noise level, is the preset analysis duration, Indicates the current analysis time point. At the current analysis time Next The weighted human voice noise sound pressure in the frequency band, is the preset reference sound pressure, is the number of frequency bands; according to the noise level, the adaptive dynamic adjustment strategy is determined.

[0092] The stable environmental noise feature may be a noise feature of a natural environment detected in the noise feature, which is usually manifested as a continuous noise signal located in a stable frequency range.

[0093] The weighted linear sound pressure may be a linear sound pressure obtained by taking into account the influence of frequency on the linear sound pressure of noise in several frequency bands and then performing frequency weighting processing.

[0094] Weighted total linear sound pressure is the total linear sound pressure obtained by superimposing several weighted linear sound pressures.

[0095] The preset analysis time duration may be a preset time duration for analyzing and processing the noise environment.

[0096] The weighted ambient noise sound pressure may be a weighted noise sound pressure of a stable ambient noise.

[0097] The weighted human voice noise sound pressure may be the noise sound pressure obtained by performing frequency weighting processing on the noise signal emitted by a person in a performance environment.

[0098] The noise level may be the degree of influence of noise caused by human factors on the hearing sense of the current audience area.

[0099] Specifically, during outdoor performances, the audience in each area will be affected by the noise of the surrounding audience and the environment. Under this influence, the natural environmental noise, such as wind, is less affected than the artificial noise. Therefore, according to the noise characteristics of several frequency bands, the average frequency of each frequency band is obtained, and then according to the obtained average frequency of each frequency band, the linear sound pressure of several frequency band noise is weighted to determine several weighted linear sound pressures, and then superimposed to obtain the weighted total linear sound pressure; since the natural environmental noise is generally stable and has the characteristics of continuity, the K-means clustering technology is used to screen the noise characteristics of several frequency bands, identify the stable environmental noise characteristics, and then combine the preset analysis time to obtain the environmental noise sound pressure after the current analysis time is weighted, and then combine the weighted total linear sound pressure to obtain the weighted human voice noise sound pressure, and then design formula (3) to calculate the noise level of the current audience area, where: Indicates the moment The instantaneous weighted sound pressure level under the condition is summed up. This value will change with time, so it needs to be averaged. is the length of the observation period. The formula calculates the average energy of the instantaneous sound pressure, so we need to calculate the entire analysis time. Integrate and then divide by To get the average effect of time; the result of formula () is the analysis time The equivalent continuous sound pressure level within a period of time is used to reflect the noise level. The energy average of all instantaneous sound pressures in the system is a way to measure the average intensity of noise. Finally, the adaptive dynamic adjustment strategy is determined based on the degree of noise.

[0100] Through the method provided in this embodiment, the noise in each frequency band is weighted. Taking into account the different effects of different frequency bands on human ear perception, this weighted processing can more accurately reflect the actual feeling of noise. The weighted linear sound pressure of each frequency band is superimposed to obtain a weighted total linear sound pressure. This value combines the contribution of noise in all frequency bands and can fully reflect the noise level in the audience area. Stable environmental noise characteristics are identified, such as continuous wind sounds. By eliminating stable environmental noise, the impact of man-made noise can be more accurately evaluated. A formula is designed to calculate the noisiness of the current audience area, and the equivalent continuous sound pressure level is used as an evaluation indicator to represent the noisiness. It can reflect the average energy level of noise during the entire observation period.

[0101] In some embodiments, a stable ambient noise level is determined according to the weighted ambient noise sound pressure; and a volume adjustment target value of each speaker is determined according to the stable ambient noise level, the noise level and the initial volume adjustment information, which is specifically the following formula (4): (4); in, is the target value for adjusting the volume of the current speaker. is the initial adjustment sound pressure level of the current speaker. is the noise level, is the stable ambient noise level, is the preset environmental noise impact coefficient, is the preset noisy human voice influence coefficient; according to the stable ambient noise level, the noise level and the initial frequency adjustment information, the frequency adjustment target value of each speaker is determined, which is specifically the following formula (5): (5); in, is the frequency adjustment target value of the current speaker. is the initial adjustment frequency of the current speaker. is the noise level, is the stable ambient noise level, is the preset gain factor adjustment constant, It is the preset noisy voice influence weight. It is a preset stable environment impact weight; the volume adjustment target value and the frequency adjustment target value are determined as an adaptive dynamic adjustment strategy.

[0102] The stable ambient noise level may be a noise level of noise caused by a natural environment.

[0103] The volume adjustment target value may be a target value for volume adjustment for adaptively adjusting the sound system under the influence of noise.

[0104] The preset environmental noise influence coefficient may be a preset influence coefficient for controlling the influence of environmental noise on volume adjustment. The preset environmental noise influence coefficient may be obtained by fitting and analyzing the environmental noise and output volume change data through a data fitting algorithm, such as a linear fitting algorithm.

[0105] The preset noisy human voice influence coefficient can be an influence coefficient used to control the influence of the noisy environment on the volume adjustment. The preset noisy human voice influence coefficient can be obtained by fitting and analyzing the noisy human voice and the output volume change data through a data fitting algorithm, such as a curve fitting algorithm.

[0106] The frequency adjustment target value may be a frequency adjustment target value that is adaptively adjusted under the influence of noise.

[0107] The preset gain factor adjustment constant may be a preset gain value for controlling the entire frequency adjustment, affecting the sensitivity of noise changes to frequency adjustment.

[0108] The preset noisy human voice influence weight may be an influence weight for controlling the influence degree of the noisy environment on the frequency adjustment.

[0109] The preset stable environment impact weight may be an impact weight used to control the impact degree of the stable environment on the frequency adjustment.

[0110] The following settings are made for the above-mentioned preset noisy human voice impact weights and the preset stable environment impact weights: In the scenario of outdoor performances, considering the actual reasonable situation, there will not be a situation where outdoor performances and extreme weather exist at the same time. At this time, the noisy human voice should occupy the main weight in the noise impact relative to the stable environment impact weight, so the noisy human voice impact weight should be much greater than the preset stable environment impact weight.

[0111] Specifically, when performing outdoor performances, since the impact of noise will affect the audience's auditory experience and the performance effect, it is necessary to make adaptive adjustments to the sound system according to the different intensities of different noises to ensure that the audience's auditory experience is satisfied. Therefore, according to the weighted ambient noise sound pressure, the sound pressure method is used to determine the stable ambient noise level. Then, according to the stable ambient noise level, the noisy degree and the initial volume adjustment information, formula (5) is designed to calculate the volume adjustment target value, where: Used to indicate the effect of stable ambient noise on volume; It is used to express the effect of noise level on volume. By taking the logarithm of noise level, the effect of noise can be smoothed to avoid excessive volume fluctuations. The overall formula adds the volume loss caused by noise level and ambient noise to the sound pressure level received in the audience area, and then adjusts the volume to the target value. According to the stable ambient noise level, noise level and initial frequency adjustment information, the design formula calculates the frequency adjustment target value, where: Used to smoothly adjust the gain so that the gain changes gradually as the noise level increases. It is an S-shaped curve based on the noise level. As the noise level increases, the frequency adjustment value gradually tends to be stable, avoiding drastic fluctuations in frequency adjustment caused by noisy human voices. Used to represent the effect of stable ambient levels on frequency adjustment, the overall formula integrates the two main noise factors and applies adjustments to the frequency through linear terms to ensure that the system can cope with continuous background noise.

[0112] By using the method provided in this embodiment, the specific adjustment value is calculated using the formula, which is conducive to more clear dynamic adjustment of the output effect of the sound. By taking the logarithm of the noise level and adding 1, the impact of the noise on the volume can be effectively smoothed, avoiding excessive volume fluctuations in the sound system when the noise changes suddenly, thereby maintaining the stability of the sound output. By dynamically adjusting the volume and frequency of the sound, it is ensured that even in a noisy outdoor environment, the audience can clearly hear the performance content without being disturbed by environmental noise, thereby improving the overall listening experience.

[0113] Figure 3 A schematic diagram of the structure of an adaptive sound control system based on environmental noise characteristics provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, an adaptive sound control system 300 based on environmental noise characteristics of this embodiment includes: a sound collection module 301, a noise extraction module 302, a preliminary strategy determination module 303, and a dynamic strategy determination module 304.

[0114] The sound collection module 301 is used to obtain some real-time environmental sound information and determine some sound signal information according to the real-time environmental sound information; The noise extraction module 302 is used to analyze the sound signal information to determine the noise information, analyze the noise information and the preset frequency band information to determine the noise characteristics of the frequency bands; A preliminary strategy determination module 303 is used to obtain audience distribution information and sound distribution information, and determine a preliminary adjustment strategy according to the audience distribution information and the sound distribution information; The dynamic strategy determination module 304 is used to determine an adaptive dynamic adjustment strategy based on the preliminary adjustment strategy and according to the noise characteristics of the frequency bands.

[0115] Optionally, the sound collection module 301 is specifically used for: Determine the sound frequency domain characteristic information according to the current sound signal information; Determining the sound spectrum structure according to the sound frequency domain characteristic information; Determining the lowest frequency peak according to the sound spectrum structure; Determining fundamental frequency information according to the lowest frequency peak value; Determining integer multiple information of the fundamental frequency according to the fundamental frequency information and the sound spectrum structure; Acquire reference signal characteristics, and determine harmonic information according to the fundamental frequency integer multiple information and the reference signal characteristics; The sound spectrum structure under each sound signal information is screened according to the fundamental frequency information and the harmonic information to determine a number of noise information.

[0116] Optionally, the noise extraction module 302 is specifically used to: Determine the noise spectrum structure according to the current noise information; According to the noise spectrum structure and the preset frequency band information, the noise signal is divided to determine a plurality of frequency band spectrum structures; According to the frequency spectrum structures of the frequency bands under each noise information, the noise characteristics of the frequency bands are determined.

[0117] Optionally, the preliminary strategy determination module 303 is specifically configured to: Determining audience density information according to the audience distribution information; Determining relative position information of the audience and the speakers according to the audience distribution information and the speakers distribution information; Determining initial frequency adjustment information according to the relative position information and the audience density information; Determining initial volume adjustment information according to the relative position information and a preset sound pressure level range; The initial frequency adjustment information and the initial volume adjustment information are determined as the preliminary adjustment strategy.

[0118] Optionally, when determining the initial frequency adjustment information according to the relative position information and the audience density information, the preliminary strategy determination module 303 is specifically configured to: Determining the number of audience distribution areas according to the audience distribution information; Determining the number of sound distributions according to the sound distribution information; Determining a relative distance according to the relative position information; According to the preset basic output frequency, the preset adjustment frequency set, the number of audience distribution areas, the number of speakers distributed and the relative distance, a loss function minimum value model is established to determine a loss value set, specifically the following loss function minimum value model: ; in, is the set of loss values, is the number of areas where the audience is distributed, is the number of sound distributions, is the current adjustment frequency of the preset adjustment frequency set, It is the preset basic output frequency of each speaker, is the relative distance between each speaker and each audience area; Determine the current adjustment frequency corresponding to the minimum value in the loss value set as the initial adjustment frequency of the current audio; The initial frequency adjustment information is determined according to the plurality of initial adjustment frequencies and the preset basic output frequency.

[0119] Optionally, when determining the initial volume adjustment information according to the relative position information, the audience density information and the preset optimal volume effect, the preliminary strategy determination module 303 is specifically used to: Determining a plurality of audience area locations according to the relative position information; Acquiring speaker placement point information, and determining a plurality of speaker positions and a plurality of speaker starting sound pressure levels according to the speaker placement point information; According to the initial adjustment frequencies, the audience area positions, the sound positions and the sound initial sound pressure levels, the current sound pressure level of each sound in any audience area is determined, specifically, by the following formula: ; in, It is The speaker is in the current sound pressure level in the audience area, is the starting sound pressure level of the sound, is the audience area location, is the speaker position, is the preset air attenuation influence coefficient, is the relative distance, is the initial adjustment frequency of a number of speakers; According to the current sound pressure levels, the sound pressure level of each sound system in the current audience area is superimposed to determine the superimposed sound pressure level; Determining an initial adjustment sound pressure level according to the superimposed sound pressure level of each audience area and the preset sound pressure level range; The initial volume adjustment information is determined according to the initial adjustment sound pressure level and the sound starting sound pressure level.

[0120] Optionally, the dynamic strategy determination module 304 is specifically configured to: Determining the noise sound pressure levels and the number of frequency bands according to the noise characteristics of the frequency bands; Determining the linear sound pressure of noise in several frequency bands according to the noise sound pressure levels in the several frequency bands and the preset reference sound pressure; According to the linear sound pressures of the noises in the frequency bands, the linear sound pressures of the noises in the frequency bands are superimposed to determine the total linear sound pressure; Based on the preliminary adjustment strategy, the adaptive dynamic adjustment strategy is determined according to the total linear sound pressure.

[0121] Optionally, when the dynamic strategy determination module 304 determines the adaptive dynamic adjustment strategy based on the preliminary adjustment strategy and according to the total linear sound pressure, it is specifically used to: Determining average frequencies and stable environmental noise characteristics of the plurality of frequency bands according to the noise characteristics of the plurality of frequency bands; According to the plurality of average frequencies, weighted processing is performed on the linear sound pressures of the noises in the plurality of frequency bands to determine a plurality of weighted linear sound pressures; Determining a weighted total linear sound pressure according to the plurality of weighted linear sound pressures; Determining a weighted ambient noise sound pressure according to the stable ambient noise characteristics and a preset analysis time; Determining a weighted human voice noise sound pressure according to the weighted total linear sound pressure and the ambient noise sound pressure; The noisiness level is determined according to the weighted human voice noise sound pressure, the preset reference sound pressure and the preset analysis time, specifically the following formula: ; in, is the noise level, is the preset analysis duration, Indicates the current analysis time point. At the current analysis time point Next The weighted human voice noise sound pressure in the frequency band, is the preset reference sound pressure, is the number of frequency bands; The adaptive dynamic adjustment strategy is determined according to the noise level.

[0122] Optionally, when determining the adaptive dynamic adjustment strategy according to the noise level, the dynamic strategy determination module 304 is specifically configured to: Determining a stable ambient noise level according to the weighted ambient noise sound pressure; According to the stable ambient noise level, the noisy level and the initial volume adjustment information, a volume adjustment target value of each speaker is determined, specifically as follows: ; in, is the target volume adjustment value of the current speaker, is the initial adjustment sound pressure level of the current speaker, is the noise level, is the stable ambient noise level, is the preset environmental noise impact coefficient, It is the preset noisy voice influence coefficient; According to the stable ambient noise level, the noise level and the initial frequency adjustment information, the frequency adjustment target value of each speaker is determined, which is specifically the following formula: ; in, is the frequency adjustment target value of the current audio system, is the initial adjustment frequency of the current speaker, is the noise level, is the stable ambient noise level, is the preset gain factor adjustment constant, It is the preset noisy voice influence weight. It is the preset stable environment impact weight; The volume adjustment target value and the frequency adjustment target value are determined as the adaptive dynamic adjustment strategy.

[0123] The system of this embodiment can be used to execute the method of any of the above embodiments. The implementation principles and technical effects are similar and will not be described in detail here.

Claims

1. A sound adaptive control method based on environmental noise characteristics, characterized in that: include: Acquire some real-time environmental sound information, and determine some sound signal information according to some of the real-time environmental sound information; Analyze some of the sound signal information to determine some noise information, analyze some of the noise information and preset frequency band information to determine some frequency band noise characteristics; Acquiring audience distribution information and sound distribution information, and determining a preliminary adjustment strategy according to the audience distribution information and the sound distribution information; Based on the preliminary adjustment strategy, according to the noise characteristics of the frequency bands, determining an adaptive dynamic adjustment strategy; According to the adaptive dynamic adjustment strategy, the sound system is adaptively and dynamically adjusted.

2. The method according to claim 1, characterized in that The analyzing the plurality of sound signal information to determine the plurality of noise information includes: Determine the sound frequency domain characteristic information according to the current sound signal information; Determining the sound spectrum structure according to the sound frequency domain characteristic information; Determining the lowest frequency peak according to the sound spectrum structure; Determining fundamental frequency information according to the lowest frequency peak value; Determining integer multiple information of the fundamental frequency according to the fundamental frequency information and the sound spectrum structure; Acquire reference signal characteristics, and determine harmonic information according to the fundamental frequency integer multiple information and the reference signal characteristics; The sound spectrum structure under each sound signal information is screened according to the fundamental frequency information and the harmonic information to determine a number of noise information.

3. The method according to claim 2, characterized in that The analyzing the noise information and the preset frequency band information to determine the noise characteristics of the frequency bands includes: Determine the noise spectrum structure according to the current noise information; According to the noise spectrum structure and the preset frequency band information, the noise signal is divided to determine a plurality of frequency band spectrum structures; According to the frequency spectrum structures of the frequency bands under each noise information, the noise characteristics of the frequency bands are determined.

4. The method according to claim 3, characterized in that The determining of a preliminary adjustment strategy according to the audience distribution information and the sound distribution information includes: Determining audience density information according to the audience distribution information; Determining relative position information of the audience and the speakers according to the audience distribution information and the speakers distribution information; Determining initial frequency adjustment information according to the relative position information and the audience density information; Determining initial volume adjustment information according to the relative position information and a preset sound pressure level range; The initial frequency adjustment information and the initial volume adjustment information are determined as the preliminary adjustment strategy.

5. The method according to claim 4, characterized in that The determining of initial frequency adjustment information according to the relative position information and the audience density information includes: Determining the number of audience distribution areas according to the audience distribution information; Determining the number of sound distributions according to the sound distribution information; Determining a relative distance according to the relative position information; According to the preset basic output frequency, the preset adjustment frequency set, the number of audience distribution areas, the number of speakers distributed and the relative distance, a loss function minimum value model is established to determine a loss value set, specifically the following loss function minimum value model: ； in, is the set of loss values, is the number of areas where the audience is distributed, is the number of sound distributions, is the current adjustment frequency of the preset adjustment frequency set, It is the preset basic output frequency of each speaker, is the relative distance between each speaker and each audience area; Determine the current adjustment frequency corresponding to the minimum value in the loss value set as the initial adjustment frequency of the current audio; The initial frequency adjustment information is determined according to the plurality of initial adjustment frequencies and the preset basic output frequency.

6. The method according to claim 5, characterized in that The determining of initial volume adjustment information according to the relative position information, the audience density information and the preset optimal volume effect includes: Determining a plurality of audience area locations according to the relative position information; Acquiring speaker placement point information, and determining a plurality of speaker positions and a plurality of speaker starting sound pressure levels according to the speaker placement point information; According to the initial adjustment frequencies, the audience area positions, the sound positions and the sound initial sound pressure levels, the current sound pressure level of each sound in any audience area is determined, specifically, by the following formula: ； in, It is The speaker is in the current sound pressure level in the audience area, is the starting sound pressure level of the sound, is the audience area location, is the speaker position, is the preset air attenuation influence coefficient, is the relative distance, is the initial adjustment frequency of a number of speakers; According to the current sound pressure levels, the sound pressure level of each sound system in the current audience area is superimposed to determine the superimposed sound pressure level; Determining an initial adjustment sound pressure level according to the superimposed sound pressure level of each audience area and the preset sound pressure level range; The initial volume adjustment information is determined according to the initial adjustment sound pressure level and the sound starting sound pressure level.

7. The method according to claim 6, characterized in that The step of determining an adaptive dynamic adjustment strategy based on the preliminary adjustment strategy and according to the noise characteristics of the frequency bands includes: Determining the noise sound pressure levels and the number of frequency bands according to the noise characteristics of the frequency bands; Determining the linear sound pressure of noise in several frequency bands according to the noise sound pressure levels in the several frequency bands and the preset reference sound pressure; According to the linear sound pressures of the noises in the frequency bands, the linear sound pressures of the noises in the frequency bands are superimposed to determine the total linear sound pressure; Based on the preliminary adjustment strategy, the adaptive dynamic adjustment strategy is determined according to the total linear sound pressure.

8. The method according to claim 7, characterized in that The step of determining the adaptive dynamic adjustment strategy based on the preliminary adjustment strategy and according to the total linear sound pressure includes: Determining average frequencies and stable environmental noise characteristics of the plurality of frequency bands according to the noise characteristics of the plurality of frequency bands; According to the plurality of average frequencies, weighted processing is performed on the linear sound pressures of the noises in the plurality of frequency bands to determine a plurality of weighted linear sound pressures; Determining a weighted total linear sound pressure according to the plurality of weighted linear sound pressures; Determining a weighted ambient noise sound pressure according to the stable ambient noise characteristics and a preset analysis time; Determining a weighted human voice noise sound pressure according to the weighted total linear sound pressure and the ambient noise sound pressure; The noisiness level is determined according to the weighted human voice noise sound pressure, the preset reference sound pressure and the preset analysis time, specifically the following formula: ； in, is the noise level, is the preset analysis duration, Indicates the current analysis time point. At the current analysis time point Next The weighted human voice noise sound pressure in each frequency band, is the preset reference sound pressure, is the number of frequency bands; The adaptive dynamic adjustment strategy is determined according to the noise level.

9. The method according to claim 8, characterized in that The step of determining the adaptive dynamic adjustment strategy according to the noise level includes: Determining a stable ambient noise level according to the weighted ambient noise sound pressure; According to the stable ambient noise level, the noisy level and the initial volume adjustment information, a volume adjustment target value of each speaker is determined, specifically as follows: ； in, is the target volume adjustment value of the current speaker, is the initial adjustment sound pressure level of the current speaker, is the noise level, is the stable ambient noise level, is the preset environmental noise impact coefficient, It is the preset noisy voice influence coefficient; According to the stable ambient noise level, the noise level and the initial frequency adjustment information, the frequency adjustment target value of each speaker is determined, which is specifically the following formula: ； in, is the frequency adjustment target value of the current audio system, is the initial adjustment frequency of the current speaker, is the noise level, is the stable ambient noise level, is the preset gain factor adjustment constant, It is the preset weight of noisy human voice. It is the preset stable environment impact weight; The volume adjustment target value and the frequency adjustment target value are determined as the adaptive dynamic adjustment strategy.

10. An adaptive sound control system based on environmental noise characteristics, characterized in that: include: A sound collection module is used to obtain some real-time environmental sound information and determine some sound signal information according to some real-time environmental sound information; A noise extraction module, used to analyze the sound signal information to determine the noise information, analyze the noise information and the preset frequency band information to determine the noise characteristics of the frequency bands; A preliminary strategy determination module, used to obtain audience distribution information and sound distribution information, and determine a preliminary adjustment strategy according to the audience distribution information and the sound distribution information; The dynamic strategy determination module is used to determine an adaptive dynamic adjustment strategy based on the preliminary adjustment strategy and according to the noise characteristics of the several frequency bands.

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