High-standard acoustic place background noise control system and method

Abstract

The invention discloses a high-standard acoustic place background noise control system and method, and belongs to the field of noise control. The invention discloses a background noise control system for a high-standard acoustic place. The background noise control system comprises a sound field parameter acquisition module, a simulation calculation module and a fan vibration noise blocking module, the problem that in the prior art, a large amount of low-frequency vibration is easily diffused to a mute key area through a structure is solved. According to the method, the low-frequency noise can be reduced, the deep suppression of the low-frequency noise is realized, the parameters of the anti-noise wall are adjusted by simulating the noise prediction values of the mute key areas under different anti-noise wall thicknesses and arrangement ranges, so that the parameters of the anti-noise wall are optimal, the noise is controlled within a target noise limit value, the anti-noise effect is ensured, and the noise reduction effect is improved. And meanwhile, after the sound absorption and insulation composite structure of the anti-noise wall is built, the noise of the mute key area is monitored, the thickness or the sealing structure of the anti-noise wall is adjusted according to the actual noise value, and accurate noise control over the mute key area is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of noise control, in particular to a high-standard acoustic place background noise control system and method. BACKGROUND

[0002] The high-standard acoustic place has strict requirements on background noise (usually ≤20dB), and vibration interference needs to be strictly controlled (vibration acceleration ≤0.01m / s 2 ). The roof fan is a high-frequency vibration and noise source, and its vibration is transmitted through the building structure, and the noise is diffused through the air, which is the main factor to destroy the acoustic environment of the place.

[0003] A noise control method and a noise control system are disclosed in Chinese Patent No. CN117765917A. The method comprises: obtaining real-time running parameter information of a motor, wherein the motor is installed on a target device, the target device generates real-time whole machine noise during operation, and the real-time running parameter information corresponds to a target operating environment; inputting the real-time running parameter information into a parameter identification model, and outputting a real-time anti-noise control instruction corresponding to the real-time running parameter information in the target operating environment through the parameter identification model, wherein the real-time anti-noise control instruction includes a real-time superimposed current; superimposing the real-time superimposed current on the motor to make the motor generate a real-time anti-noise opposite to the real-time whole machine noise to offset the real-time whole machine noise. The noise reduction method changes the previous noise reduction method from the structure, realizes intelligent noise processing, and does not need to use a noise sensor in the noise reduction process, avoiding the occupation of the space of the target device due to the change of the structure or the increase of the noise sensor.

[0004] The above-mentioned patent only aims at air sound transmission in actual use, does not perform vibration reduction treatment on the connection between the motor and the foundation, and is easy to cause a large amount of low-frequency vibration to be diffused to the quiet key area through the structure; therefore, it does not meet the existing requirements, and for this purpose, the present application provides a high-standard acoustic place background noise control system and method. SUMMARY

[0005] The present application aims to provide a high-standard acoustic place background noise control system and method, which can reduce low-frequency noise, realize deep suppression of low-frequency noise, adjust the parameters of the noise-proof wall by simulating the noise prediction value of the quiet key area under different noise-proof wall thicknesses and arrangement ranges, so that the parameters of the noise-proof wall reach the optimum, and then control the noise within the target noise limit value, guarantee the noise-proof effect, monitor the noise of the quiet key area after the noise-proof wall sound absorption and insulation composite structure is built, and adjust the thickness or sealing structure of the noise-proof wall according to the actual noise value, realize precise noise control of the quiet key area, and solve the problems in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-standard acoustic venue background noise control system, comprising: The sound field parameter acquisition module is used to collect background noise parameters in key silent areas, sound field radiation parameters during fan operation, and fan vibration parameters. The simulation calculation module is used to construct an acoustic transmission model by using the collected noise parameters, sound field radiation parameters, and vibration parameters, combined with the target noise limit of the silent key area, and output the optimal noise barrier parameters using the acoustic transmission model. The fan vibration and noise blocking module is used to build a sound-absorbing and sound-insulating composite structure for the noise barrier based on the optimal noise barrier parameters. This composite structure blocks the sound field diffusion and vibration transmission of the fan.

[0007] Preferably, the sound field parameter acquisition module includes: Acoustic sensors are deployed in key quiet areas of high-standard acoustic venues and around the rooftop fans to collect background noise parameters in key quiet areas and sound field radiation parameters during fan operation. Vibration sensors are fixed at the connection between the fan base and the building floor slab to collect fan vibration parameters.

[0008] Preferably, the simulation calculation module includes: The collected noise parameters, sound field radiation parameters, and vibration parameters were used to construct a fan noise radiation model, a noise barrier sound insulation model, and an acoustic propagation model inside the site, respectively. An acoustic transmission model is constructed by combining the noise radiation model of the fan, the sound insulation model of the noise barrier wall, and the acoustic propagation model inside the venue with the target noise limit of the quiet key area. The acoustic transmission model was used to simulate the predicted noise levels in key quiet areas under different noise barrier thicknesses and layout ranges. The parameters of the noise barrier are optimized based on the predicted noise values ​​to obtain the noise barrier parameters that meet the target noise limit and have the best engineering cost.

[0009] Preferably, the step of constructing a fan noise radiation model, a noise barrier sound insulation model, and an internal acoustic propagation model using the collected noise parameters, sound field radiation parameters, and vibration parameters respectively includes: The collected noise parameters, sound field radiation parameters, and vibration parameters were preprocessed, and the preprocessed dataset was divided into training set, validation set, and test set in a ratio of 7:2:1. A backpropagation (BP) neural network was selected and trained using a training set. The mean square error (MSE) was used as the loss function to construct initial models for wind turbine noise radiation, noise barrier sound insulation, and acoustic propagation within the venue. The initial models for wind turbine noise radiation, noise barrier sound insulation, and acoustic propagation within the site were validated using the validation set. After verification, tests were conducted using a test set. Once the tests were passed, the following models were obtained: fan noise radiation model, noise barrier sound insulation model, and acoustic propagation model within the venue.

[0010] Preferably, the construction of the acoustic transmission model by combining the fan noise radiation model, the noise barrier sound insulation model, and the acoustic propagation model within the venue with the target noise limit of the key quiet area specifically includes: Based on the acoustic transmission link, the final sound pressure level of ≤20 dB in the quiet area is decomposed into intermediate constraint targets of each sub-model to form a closed loop. The acoustic transmission link is: the fan radiation to the noise barrier wall sound insulation to the venue and then to the quiet area. In addition to noise parameters, sound field radiation parameters, and vibration parameters, target correlation parameters are added; A direct mapping between the target noise radiation model of the fan, the sound insulation model of the noise barrier wall, the acoustic propagation model inside the venue, and the target noise limit of the silent key area is established using target correlation parameters. The noise radiation model of the fan, the sound insulation model of the noise barrier wall, and the acoustic propagation model inside the venue are directly mapped and fused with the target noise limit of the corresponding key quiet areas. After fusion, the fan noise radiation model, the noise barrier sound insulation model, and the acoustic propagation model inside the venue are connected in sequence to form a complete acoustic transmission model.

[0011] Preferably, the fan vibration and noise blocking module includes: Based on the optimal noise barrier parameters, a noise barrier sound absorption and sound insulation composite structure was built around the rooftop fan, and the noise level was tested. After the noise-absorbing and sound-insulating composite structure of the noise-proof wall is completed, the fan is started to test the noise level in the key silent areas; Monitor the actual noise level in key quiet areas. If the actual noise level exceeds the target noise limit, adjust the thickness or sealing structure of the noise barrier until the actual noise level meets the target noise limit.

[0012] A method for controlling background noise in high-standard acoustic environments, applied in a background noise control system for high-standard acoustic environments, includes the following steps: S1: Under the rated operating condition of the rooftop fan, continuously collect data for no less than 1 hour to obtain the background noise baseline value of the quiet key area in the site, the sound field radiation parameters around the fan, and the vibration parameters of the fan. S2: Construct a fan noise radiation model, a noise barrier sound insulation model, and an acoustic propagation model inside the venue using the collected parameters. S3: Integrate the fan noise radiation model, the noise barrier sound insulation model, and the acoustic propagation model inside the venue with the target noise limit of the quiet key area to construct an acoustic transmission model; S4: Use an acoustic transmission model to simulate the predicted noise levels in key quiet areas under different noise barrier thicknesses and layout ranges, select the scheme that meets the target noise limit and has the best engineering cost, and determine the optimal noise barrier parameters. S5: Based on the optimal noise barrier parameters, construct a noise barrier sound absorption and sound insulation composite structure around the rooftop fan; S6: After the construction is completed, start the fan and monitor the actual noise value in the key silent areas. If the actual noise value exceeds the target noise limit, adjust the thickness of the noise barrier or the sealing structure until the actual noise value meets the target noise limit.

[0013] Preferably, the noise-absorbing and sound-insulating composite structure of the noise-proof wall includes a noise-proof wall body and a sound-insulating sealing structure. The noise-proof wall body is provided with a sound-insulating sealing structure at the connection between the noise-proof wall body and the ground and building floor. The noise-proof wall body is arranged in a closed loop along the entire circumference of the fan, and the height of the noise-proof wall body is 0.5 to 1.0 m higher than the height of the fan. The distance between the noise-proof wall body and the fan is 1.3 to 1.4 times the diameter of the fan.

[0014] Preferably, the main body of the noise-proof wall includes an inner layer of sound-absorbing material and an outer layer of sound-insulating board. The inner layer of sound-absorbing material is centrifugal glass wool or rock wool with a thickness of 100-200mm. The outer layer of sound-insulating board is high-density concrete with a thickness of 200-400mm. The sound insulation and sealing structure is a gap filled with sound insulation sealant, and the sound insulation and sealing structure is filled with sound insulation sealant.

[0015] Preferably, the continuous data collection for not less than 1 hour means collecting data continuously for 1 to 3 hours under the condition that the fan is running at its rated load and there is no external noise interference. The actual noise value of the key silent area is monitored continuously for 1 to 3 months, and the number of monitoring times per month is not less than 3.

[0016] Compared with the prior art, the beneficial effects of the present invention are: The noise-reducing wall of this invention comprises an inner layer of sound-absorbing material and an outer layer of sound-insulating material, combined with a sound-insulating and sealing structure. This reduces low-frequency noise, an effect stemming from the synergistic effect of the mass law and the principle of resonance. High-density concrete blocks sound wave propagation through inertia, while rock wool dissipates sound energy through fiber friction. The sound-insulating and sealing structure cuts off the transmission path of fan noise to the building structure, achieving deep suppression of low-frequency noise. Through a sound insulation and sound absorption control system, the propagation path of solid-borne sound is completely cut off. By simulating the predicted noise values ​​of key quiet areas under different noise-reducing wall thicknesses and layout ranges, the parameters of the noise-reducing wall are adjusted to achieve optimal parameters, thereby controlling noise within the target noise limit and ensuring the noise reduction effect. Furthermore, after the noise-absorbing and sound-insulating composite structure of the noise-reducing wall is constructed, the noise in the key quiet areas is monitored, and the thickness or sealing structure of the noise-reducing wall is adjusted according to the actual noise value, achieving precise noise control in the key quiet areas. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a high-standard acoustic background noise control system for a venue according to the present invention; Figure 2 This is a schematic diagram of a high-standard acoustic environment background noise control method according to the present invention; Figure 3 This is a schematic diagram of the noise-absorbing and sound-insulating composite structure of the noise-proof wall of the present invention installed along the fan; Figure 4 This is a schematic diagram of the noise-absorbing and sound-insulating composite structure of the noise-proof wall of the present invention.

[0018] In the diagram: 1. Noise barrier wall main body; 2. Sound insulation and sealing structure; 3. Building floor slab; 4. Ground. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] To address the issue that existing technologies only address airborne sound transmission in practical applications and fail to dampen the connection between the motor and the foundation, which can easily lead to significant low-frequency vibrations propagating through the structure to critical noise-reducing areas, please refer to [the relevant documentation / reference]. Figures 1-4 This embodiment provides the following technical solution: A high-standard acoustic environment background noise control system includes: The sound field parameter acquisition module is used to collect background noise parameters in key silent areas, sound field radiation parameters during fan operation, and fan vibration parameters. The simulation calculation module is used to construct an acoustic transmission model by using the collected noise parameters, sound field radiation parameters, and vibration parameters, combined with the target noise limit of the silent key area. The acoustic transmission model is used to output the optimal noise barrier parameters, including the noise barrier thickness and the layout range. The fan vibration and noise blocking module is used to build a sound-absorbing and sound-insulating composite structure of the noise barrier according to the optimal noise barrier parameters, and to block the sound field diffusion and vibration transmission of the fan by utilizing the sound-absorbing and sound-insulating composite structure of the noise barrier. The optimal noise barrier parameters output by the simulation calculation module are used to guide the construction of the fan vibration and noise blocking module, so as to achieve background noise control in key quiet areas of high-standard acoustic venues.

[0021] The sound field parameter acquisition module includes: Acoustic sensors are deployed in key quiet areas of high-standard acoustic venues and around the rooftop fans to collect background noise parameters in key quiet areas and sound field radiation parameters during fan operation. Vibration sensors are fixed at the connection between the fan base and the building floor slab to collect fan vibration parameters.

[0022] The simulation calculation module includes: The collected noise parameters, sound field radiation parameters, and vibration parameters were used to construct a fan noise radiation model, a noise barrier sound insulation model, and an acoustic propagation model inside the site, respectively. An acoustic transmission model is constructed by combining the noise radiation model of the fan, the sound insulation model of the noise barrier wall, and the acoustic propagation model inside the venue with the target noise limit of the quiet key area. The acoustic transmission model was used to simulate the predicted noise levels in key quiet areas under different noise barrier thicknesses and layout ranges. The parameters of the noise barrier are optimized based on the predicted noise values ​​to obtain the noise barrier parameters that meet the target noise limit and have the best engineering cost.

[0023] The parameters of the noise barrier are optimized based on the predicted noise levels. Specifically, if the predicted final sound pressure level in the quiet area is >20 dB, the parameters are optimized according to the following priority: First priority: Thicken the noise barrier by 0.05 meters each time and recalculate the sound insulation attenuation; Second priority: Increase the enclosure angle by 30 degrees each time and recalculate the angle correction attenuation; Third priority: Replace with high sound-absorbing material and recalculate the sound absorption attenuation and the sum of reflected sound. For example, if the initial calculated final sound pressure level is 22 dB (2 dB over the standard), thickening the noise barrier to 0.35 meters increases the sound insulation attenuation from 67.14 dB to 72.3 dB, and the total sound insulation attenuation increases to 76.5 dB. The sound pressure level outside the noise barrier drops to 80.96 - 76.5 = 4.46 dB, and the final sound pressure level in the quiet area = 4.46 - 25.6 + 6.82 = -14.32 dB (meets the standard). Using the collected noise parameters, sound field radiation parameters, and vibration parameters, a fan noise radiation model, a noise barrier sound insulation model, and an acoustic propagation model within the site are constructed, specifically including: The collected noise parameters, sound field radiation parameters, and vibration parameters were preprocessed. The preprocessed dataset was then divided into training, validation, and test sets in a 7:2:1 ratio. Obvious outliers were removed using the 3σ rule to ensure the data only reflected the inherent noise and vibration of the location. Quantitative parameters (such as vibration acceleration and reflected sound pressure level) were standardized using min-max, while qualitative parameters (such as noise source type, equipment noise, and structural vibration noise) were multi-valued. A dual analysis using Pearson coefficient and mutual information entropy was employed: first, parameters linearly correlated with background noise in quiet areas (such as equipment vibration frequency and radiated sound pressure level) were screened using the Pearson coefficient; then, nonlinearly correlated parameters (such as boundary reflection coefficient and vibration transmission attenuation rate) were identified using mutual information entropy. Parameters with a correlation coefficient <0.4 were removed (0.3 for typical locations, and higher correlation coefficients are required for high-standard environments), retaining only core influencing parameters (e.g., in a precision laboratory, only three key parameters were retained: equipment vibration frequency, radiated sound pressure level, and ground reflection coefficient). A backpropagation (BP) neural network was selected and trained using a training set. The mean square error (MSE) was used as the loss function to construct initial models for wind turbine noise radiation, noise barrier sound insulation, and acoustic propagation within the venue. The initial models for wind turbine noise radiation, noise barrier sound insulation, and acoustic propagation within the site were validated using the validation set. After verification, tests were conducted using a test set. Once the tests were passed, the following models were obtained: fan noise radiation model, noise barrier sound insulation model, and acoustic propagation model within the venue.

[0024] An acoustic transmission model is constructed by combining a fan noise radiation model, a noise barrier sound insulation model, and an internal acoustic propagation model with target noise limits for key quiet areas. Specifically, this includes: Based on the acoustic transmission link, the final sound pressure level of ≤20 dB in the quiet area is decomposed into intermediate constraint targets of each sub-model to form a closed loop. The acoustic transmission link is: the fan radiation to the noise barrier wall sound insulation to the venue and then to the quiet area. In addition to noise parameters, sound field radiation parameters, and vibration parameters, target correlation parameters are added; A direct mapping between the target noise radiation model of the fan, the sound insulation model of the noise barrier wall, the acoustic propagation model inside the venue, and the target noise limit of the silent key area is established using target correlation parameters. The noise radiation model of the fan, the sound insulation model of the noise barrier wall, and the acoustic propagation model inside the venue are directly mapped and fused with the target noise limit of the corresponding key quiet areas. After fusion, the fan noise radiation model, the noise barrier sound insulation model, and the acoustic propagation model inside the venue are connected in sequence to form a complete acoustic transmission model.

[0025] The fan vibration and noise reduction module includes: Based on the optimal noise barrier parameters, a noise barrier sound absorption and sound insulation composite structure was built around the rooftop fan, and the noise level was tested. After the noise-absorbing and sound-insulating composite structure of the noise-proof wall is completed, the fan is started to test the noise level in the key silent areas; Monitor the actual noise level in key quiet areas. If the actual noise level exceeds the target noise limit, adjust the thickness or sealing structure of the noise barrier until the actual noise level meets the target noise limit.

[0026] A method for controlling background noise in high-standard acoustic environments, applied in a background noise control system for high-standard acoustic environments, includes the following steps: S1: Under the rated operating condition of the rooftop fan, continuously collect data for no less than 1 hour to obtain the background noise baseline value of the quiet key area in the site, the sound field radiation parameters around the fan, and the vibration parameters of the fan. S2: Construct a fan noise radiation model, a noise barrier sound insulation model, and an acoustic propagation model inside the venue using the collected parameters. S3: Integrate the fan noise radiation model, the noise barrier sound insulation model, and the acoustic propagation model inside the venue with the target noise limit of the quiet key area to construct an acoustic transmission model; S4: Use an acoustic transmission model to simulate the predicted noise levels in key quiet areas under different noise barrier thicknesses and layout ranges, select the scheme that meets the target noise limit and has the best engineering cost, and determine the optimal noise barrier parameters. S5: Based on the optimal noise barrier parameters, construct a noise barrier sound absorption and sound insulation composite structure around the rooftop fan; S6: After the construction is completed, start the fan and monitor the actual noise value in the key silent areas. If the actual noise value exceeds the target noise limit, adjust the thickness of the noise barrier or the sealing structure until the actual noise value meets the target noise limit.

[0027] The noise reduction wall sound absorption and insulation composite structure includes a noise reduction wall body 1 and a sound insulation and sealing structure 2. The sound insulation and sealing structure 2 is set at the connection between the noise reduction wall body 1 and the ground 4 and the building floor slab 3. The noise reduction wall body 1 is arranged in a closed manner along the entire circumference of the fan, and the height of the noise reduction wall body 1 is 0.5 to 1.0 m higher than the height of the fan. The distance between the noise reduction wall body 1 and the fan is 1.3 to 1.4 times the diameter of the fan.

[0028] The main body 1 of the noise barrier wall includes an inner layer of sound-absorbing material and an outer layer of sound-insulating board. The inner layer of sound-absorbing material is centrifugal glass wool or rock wool with a thickness of 100-200mm. The outer layer of sound-insulating board is high-density concrete with a thickness of 200-400mm. The sound insulation and sealing structure 2 is a gap filled with sound insulation sealant. The sound insulation and sealing structure 2 is filled with sound insulation sealant, and the gap width is ≤2mm.

[0029] Continuous data collection for at least 1 hour means collecting data continuously for 1 to 3 hours under the condition of the fan operating at its rated load and without external noise interference. The actual noise value of the key silent area should be monitored continuously for 1 to 3 months, with no less than 3 monitoring times per month, to ensure that the noise value fluctuation is ≤0.5dB(A).

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "include," "contain," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A high-standard acoustic environment background noise control system, characterized in that, include: The sound field parameter acquisition module is used to collect background noise parameters in key silent areas, sound field radiation parameters during fan operation, and fan vibration parameters. The simulation calculation module is used to construct an acoustic transmission model by using the collected noise parameters, sound field radiation parameters, and vibration parameters, combined with the target noise limit of the silent key area, and output the optimal noise barrier parameters using the acoustic transmission model. The fan vibration and noise blocking module is used to build a sound-absorbing and sound-insulating composite structure for the noise barrier based on the optimal noise barrier parameters. This composite structure blocks the sound field diffusion and vibration transmission of the fan.

2. The high-standard acoustic venue background noise control system according to claim 1, characterized in that, The sound field parameter acquisition module includes: Acoustic sensors are deployed in key quiet areas of high-standard acoustic venues and around the rooftop fans to collect background noise parameters in key quiet areas and sound field radiation parameters during fan operation. Vibration sensors are fixed at the connection between the fan base and the building floor slab to collect fan vibration parameters.

3. The high-standard acoustic venue background noise control system according to claim 1, characterized in that, The simulation calculation module includes: The collected noise parameters, sound field radiation parameters, and vibration parameters were used to construct a fan noise radiation model, a noise barrier sound insulation model, and an acoustic propagation model inside the site, respectively. An acoustic transmission model is constructed by combining the noise radiation model of the fan, the sound insulation model of the noise barrier wall, and the acoustic propagation model inside the venue with the target noise limit of the quiet key area. The acoustic transmission model was used to simulate the predicted noise levels in key quiet areas under different noise barrier thicknesses and layout ranges. The parameters of the noise barrier are optimized based on the predicted noise values ​​to obtain the noise barrier parameters that meet the target noise limit and have the best engineering cost.

4. A high-standard acoustic venue background noise control system according to claim 1, characterized in that, The process involves constructing a fan noise radiation model, a noise barrier sound insulation model, and an internal acoustic propagation model using collected noise parameters, sound field radiation parameters, and vibration parameters, respectively. Specifically, this includes: The collected noise parameters, sound field radiation parameters, and vibration parameters were preprocessed, and the preprocessed dataset was divided into training set, validation set, and test set in a ratio of 7:2:

1. A backpropagation (BP) neural network was selected and trained using a training set. The mean square error (MSE) was used as the loss function to construct initial models for wind turbine noise radiation, noise barrier sound insulation, and acoustic propagation within the venue. The initial models for wind turbine noise radiation, noise barrier sound insulation, and acoustic propagation within the site were validated using the validation set. After verification, tests were conducted using a test set. Once the tests were passed, the following models were obtained: fan noise radiation model, noise barrier sound insulation model, and acoustic propagation model within the venue.

5. A high-standard acoustic venue background noise control system according to claim 1, characterized in that, The acoustic transmission model is constructed by combining the fan noise radiation model, the noise barrier sound insulation model, and the acoustic propagation model within the venue with the target noise limit of the key quiet area, specifically including: Based on the acoustic transmission link, the final sound pressure level of ≤20 dB in the quiet area is decomposed into intermediate constraint targets of each sub-model to form a closed loop. The acoustic transmission link is: the fan radiation to the noise barrier wall sound insulation to the venue and then to the quiet area. In addition to noise parameters, sound field radiation parameters, and vibration parameters, target correlation parameters are added; A direct mapping between the target noise radiation model of the fan, the sound insulation model of the noise barrier wall, the acoustic propagation model inside the venue, and the target noise limit of the silent key area is established using target correlation parameters. The noise radiation model of the fan, the sound insulation model of the noise barrier wall, and the acoustic propagation model inside the venue are directly mapped and fused with the target noise limit of the corresponding key quiet areas. After fusion, the fan noise radiation model, the noise barrier sound insulation model, and the acoustic propagation model inside the venue are connected in sequence to form a complete acoustic transmission model.

6. A high-standard acoustic venue background noise control system according to claim 1, characterized in that, The fan vibration and noise blocking module includes: Based on the optimal noise barrier parameters, a noise barrier sound absorption and sound insulation composite structure was built around the rooftop fan, and the noise level was tested. After the noise-absorbing and sound-insulating composite structure of the noise-proof wall is completed, the fan is started to test the noise level in the key silent areas; Monitor the actual noise level in key quiet areas. If the actual noise level exceeds the target noise limit, adjust the thickness or sealing structure of the noise barrier until the actual noise level meets the target noise limit.

7. A method for controlling background noise in high-standard acoustic environments, applied in a high-standard acoustic environment background noise control system as described in claim 6, characterized in that, Includes the following steps: S1: Under the rated operating condition of the rooftop fan, continuously collect data for no less than 1 hour to obtain the background noise baseline value of the quiet key area in the site, the sound field radiation parameters around the fan, and the vibration parameters of the fan. S2: Construct a fan noise radiation model, a noise barrier sound insulation model, and an acoustic propagation model inside the venue using the collected parameters. S3: Integrate the fan noise radiation model, the noise barrier sound insulation model, and the acoustic propagation model inside the venue with the target noise limit of the quiet key area to construct an acoustic transmission model; S4: Use an acoustic transmission model to simulate the predicted noise levels in key quiet areas under different noise barrier thicknesses and layout ranges, select the scheme that meets the target noise limit and has the best engineering cost, and determine the optimal noise barrier parameters. S5: Based on the optimal noise barrier parameters, construct a noise barrier sound absorption and sound insulation composite structure around the rooftop fan; S6: After the construction is completed, start the fan and monitor the actual noise value in the key silent areas. If the actual noise value exceeds the target noise limit, adjust the thickness of the noise barrier or the sealing structure until the actual noise value meets the target noise limit.

8. The method for controlling background noise in high-standard acoustic venues according to claim 7, characterized in that, The noise-proof wall sound-absorbing and sound-insulating composite structure includes a noise-proof wall body (1) and a sound-insulating sealing structure (2). The noise-proof wall body (1) is connected to the ground and building floor slab with a sound-insulating sealing structure (2). The noise-proof wall body (1) is arranged in a closed manner along the entire circumference of the fan, and the height of the noise-proof wall body (1) is 0.5 to 1.0 m higher than the height of the fan. The distance between the noise-proof wall body (1) and the fan is 1.3 to 1.4 times the diameter of the fan.

9. A method for controlling background noise in high-standard acoustic environments according to claim 7, characterized in that, The main body (1) of the noise-proof wall includes an inner layer of sound-absorbing material and an outer layer of sound-insulating board. The inner layer of sound-absorbing material is centrifugal glass wool or rock wool with a thickness of 100-200mm. The outer layer of sound-insulating board is high-density concrete with a thickness of 200-400mm. The sound insulation sealing structure (2) is a gap filled with sound insulation sealant. The sound insulation sealing structure (2) is filled with sound insulation sealant, and the gap width is ≤2mm.

10. A method for controlling background noise in high-standard acoustic environments according to claim 7, characterized in that, The continuous data collection of no less than 1 hour means collecting data continuously for 1 to 3 hours under the condition that the fan is running at its rated load and there is no external noise interference. The actual noise value of the key silent area is monitored continuously for 1 to 3 months, and the number of monitoring times per month is no less than 3.

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