Noise map drawing method and device and storage medium

Abstract

The invention provides a noise map drawing method and device and a storage medium. The method comprises the following steps: classifying sound sources in a target area according to a preset sound source type; wherein the preset sound source type comprises a road traffic sound source and a fixed equipment sound source; carrying out standardized equivalence on the noise level of each road traffic sound source; determining first noise level distribution of each road traffic sound source in the target area according to the standardized equivalent result and the position of each road traffic sound source; and determining a noise map of the target area at least according to the first noise level distribution. According to the noise map drawing method, calculation time is greatly shortened, rapid drawing of the noise map is achieved, and meanwhile dynamic updating of the noise map is facilitated.

Description

Technical Field

[0001] The present invention relates to the field of noise monitoring technology, and in particular to a noise map drawing method, device and storage medium. Background Art

[0002] With the rapid development of urbanization, environmental noise pollution has attracted more and more public attention. Noise maps show the distribution of noise pollution in urban areas in digital and graphical form.

[0003] In recent years, the scale of urban areas in my country has continued to expand and the population density has continued to rise. Traditional noise maps can no longer meet the needs of real-time monitoring of urban environmental noise. In addition, the current noise map drawing is usually based on existing environmental acoustic simulation software, which draws noise maps by modeling the entire calculation block. During the modeling process of this method, a large number of different sound sources need to be set up, and the single calculation time of the model is relatively long. At the same time, due to its long calculation time, it cannot meet the technical requirements of real-time updates.

[0004] Therefore, there is an urgent need to find new technical routes to achieve rapid calculation and dynamic updating of noise maps. Summary of the invention

[0005] Based on this, the present invention aims to provide an improved noise map drawing method to solve at least one of the above problems.

[0006] In a first aspect, the present application provides a noise map drawing method, comprising:

[0007] Classifying the sound sources in the target area according to preset sound source types; wherein the preset sound source types include road traffic sound sources and fixed equipment sound sources;

[0008] Standardize and make equivalent the noise level of each road traffic sound source;

[0009] Determine a first noise level distribution of each of the road traffic sound sources within the target area according to the standardized equivalent result;

[0010] A noise map of the target area is determined based on at least the first noise level distribution.

[0011] The above noise map drawing method classifies the sound sources and standardizes the noise levels of road traffic sound sources, and then determines the first noise level distribution of each road traffic sound source in the target area based on the equivalent results, thereby determining the noise map of the target area. Since the calculation time of the software is exponentially related to the type and number of sound sources, the above standardized equivalent method is conducive to greatly shortening the calculation time and realizing the rapid drawing of noise maps. On this basis, when dynamically updating the noise map, it is beneficial to calculate and adjust the classified sound sources separately, without calculating and adjusting all sound sources in the target area according to the requirements of the traditional model, thereby realizing the rapid dynamic update of the noise map.

[0012] In one of the embodiments, determining the noise map of the target area at least based on the first noise level distribution includes: obtaining a second noise level distribution of each fixed equipment sound source in the target area; and superimposing and calculating the first noise level distribution and the second noise level distribution to determine the noise map of the target area.

[0013] In one embodiment, the noise level of each road traffic sound source is standardized and equivalent, including: obtaining the vehicle type, speed and traffic flow on each road; equating the traffic flow of different vehicle types at the corresponding speed limit on each road to the standard traffic flow of vehicles of a preset vehicle type at a preset speed according to the noise contribution; and determining the standardized equivalent result according to the standard traffic flow of each road and the noise level at the reference position in the target area.

[0014] In one embodiment, the method of determining the standardized equivalent result according to the standard traffic flow of each road and the noise level of the reference position in the target area includes: dividing the target area into a plurality of blocks according to the standard traffic flow of each road; wherein the standard traffic flow of each road in the block has a corresponding proportional relationship; obtaining the noise monitoring results of the noise monitoring points in each of the blocks; wherein the noise monitoring results are used to indicate the noise level of the noise monitoring points; determining the noise level of other positions in each of the blocks according to the proportional relationship between the noise monitoring results of each of the blocks and the standard traffic flow of each road in each of the blocks; and determining the first noise level distribution of each road traffic sound source in the target area according to the noise level of each position in each of the blocks.

[0015] In one of the embodiments, at least two blocks in the target area have overlapping positions; before determining the first noise level distribution of each road traffic sound source in the target area, it includes: obtaining the noise contribution value of each block at the overlapping position; superimposing and calculating the noise contribution value of each block at the overlapping position to obtain the noise level of the overlapping position.

[0016] In one of the embodiments, it also includes: establishing a noise database for each of the blocks; wherein the noise database includes real-time noise distribution data of the blocks; in response to a noise update instruction, calling the noise database of the block; superimposing and calculating the real-time noise distribution data of the noise database of each of the blocks to update the noise map.

[0017] In one of the embodiments, the establishing of the noise database for each of the blocks includes: obtaining location information indicating the location of the block, real-time monitoring results of the noise monitoring points, and monitoring time period information; updating the first noise level distribution of the block according to the real-time monitoring results of the noise monitoring points; and determining the real-time noise distribution data of the block at least according to the updated first noise level distribution.

[0018] In one of the embodiments, it further includes: if the number of sound sources in the target area changes, a block is added at the position where the sound source increases / decreases, and a superposition calculation of the noise contribution value is performed to update the noise level at the position where the sound source increases / decreases.

[0019] In a second aspect, the present application provides a noise map drawing device, comprising:

[0020] A classification module is configured to classify the sound sources in the target area according to preset sound source types, wherein the preset sound source types include road traffic sound sources and fixed equipment sound sources;

[0021] An equivalent module is configured to standardize and equate the noise level of each road traffic sound source;

[0022] A calculation module, configured to determine a first noise level distribution of each of the road traffic sound sources in the target area according to the standardized equivalent result;

[0023] A drawing module is configured to determine a noise map of the target area at least according to the first noise level distribution.

[0024] In a third aspect, the present application provides a computer-readable storage medium for storing a computer program, wherein the computer program enables a computer to execute the steps of the method described in any of the foregoing embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the implementation methods of this specification or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 This is a flowchart of an embodiment of the present application;

[0027] Figure 2 A schematic diagram of a target area according to an embodiment of the present application;

[0028] Figure 3 A schematic diagram of the target area block division according to an embodiment of the present application;

[0029] Figure 4 A schematic diagram of a noise map drawn for an embodiment of the present application;

[0030] Figure 5 Schematic diagram of the composition of a noise map drawing device according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0035] At present, it is impossible to achieve large-scale rapid updates of dynamic noise map management systems using mature acoustic calculation software. This is mainly because noise maps have certain requirements for the accuracy of calculation grid points (generally not less than 10m×10m). There are 200,000 calculation grids in 20 square kilometers. The image processing time exceeds the minimum requirement for map hourly updates. Therefore, the huge amount of calculation of grid points restricts the dynamic update of large-scale noise maps. There is an urgent need for a method that can realize the rapid calculation and update of large-scale noise maps.

[0036] Based on the above problems, the embodiment of the present application provides an improved noise map drawing method, which classifies the sound sources and standardizes the noise levels of road traffic sound sources, and then determines the first noise level distribution of each road traffic sound source in the target area based on the equivalent results, thereby determining the noise map of the target area. Since the calculation time of the software is exponentially related to the type and number of sound sources, the above-mentioned standardized equivalent method is conducive to greatly shortening the calculation time and realizing the rapid drawing of the noise map. Compared with the model that takes about 3 hours to calculate by the traditional method, this method only takes about 10 minutes to calculate. On this basis, when the noise map is dynamically updated, it is beneficial to calculate and adjust the classified sound sources separately, without having to calculate and adjust all sound sources in the target area according to the requirements of the traditional model, thereby realizing the rapid dynamic update of the noise map.

[0037] like Figure 1 As shown, an embodiment of the present application provides a noise map drawing method, comprising:

[0038] S100: classify the sound sources in the target area according to preset sound source types; wherein the preset sound source types include road traffic sound sources and fixed equipment sound sources.

[0039] Exemplarily, the target area may be a city or part of a city, the road traffic sound source may be the city’s highway traffic sound source (such as the driving noise of small oil trucks, heavy trucks, etc.), the railway traffic sound source (such as the driving noise of trains, intercity trains, high-speed trains, etc. on the railway), and the fixed equipment sound source may be the mechanical equipment sound source in the factory, the broadcast sound source in the city, etc.

[0040] S200: standardize and make equivalent the noise level of each road traffic sound source.

[0041] For example, since vehicle noise has similar soundprint characteristics, the noise levels of various road traffic sound sources can be standardized and equivalent. For example, the noise contribution corresponding to the traffic volume of the same vehicle model at the same speed can be used as the benchmark unit for standardization and equivalent. In this way, different types of sound sources can be normalized and classified, thereby greatly shortening the calculation time.

[0042] Optionally, step S200 includes:

[0043] S210, obtaining vehicle types, vehicle speeds, and vehicle flow rates on each road;

[0044] S220, equating the traffic flow of different types of vehicles at the corresponding speed limit on each road to the standard traffic flow of vehicles of a preset type at a preset speed according to the noise contribution;

[0045] S230: Determine a standardized equivalent result according to the standard traffic volume of each road and the noise level of the reference position in the target area.

[0046] For example, taking highway traffic as an example, the main noise contribution factors of highway traffic are traffic volume, vehicle model and vehicle speed. Using simulation software, the equivalent noise value of vehicles of different models according to the traffic volume is calculated according to the specified speed (usually according to the speed limit of the road section). For example: under the condition of a speed limit of 50km / h, the noise level contributed by a heavy truck is equivalent to 16 small oil trucks; at the same time, under the condition of a speed limit of 80km / h, a small oil truck with a traffic volume of 400 / h is equivalent to a small oil truck with a traffic volume of 550 / h under a speed limit of 50km / h, and so on. According to this calculation method, the traffic volume information of all sections can be normalized into the standard traffic volume of the same model at the same speed, and the equivalent of highway traffic noise level can be performed on this basis. It can be understood that railway traffic can also be divided according to vehicle model and speed, which will not be repeated here. According to this division, the traffic volume noise of several highways or railway trunk lines can be equivalent to the standard traffic volume noise, thereby greatly reducing the number of sound sources.

[0047] For example, since the traffic flow at the reference position of the target area is also standardized and equivalent, the noise level at other positions of the target area can be quickly determined based on the noise level at the reference position of the target area combined with the traffic flow at the reference position of the target area and the standard traffic flow at other positions, and then the standardized equivalent results of each road can be determined.

[0048] Optionally, step S230 includes:

[0049] S231, dividing the target area into a plurality of blocks according to the standard traffic flow of each road; wherein the standard traffic flow of each road in the block has a corresponding proportional relationship;

[0050] S232, obtaining noise monitoring results of noise monitoring points in each of the blocks; wherein the noise monitoring results are used to indicate the noise level of the noise monitoring points;

[0051] S233, determining the noise level of other locations in each block according to the noise monitoring results of each block and the proportional relationship between the standard traffic volume of each road in each block;

[0052] S234. Determine a first noise level distribution of each road traffic sound source in the target area according to the noise level of each position in each block.

[0053] For example, Figure 2 and Figure 3 As shown in the figure, when the target area is a city, the urban area can be divided into multiple blocks according to the standard traffic volume of the road, and the standard traffic volume of the road in each block should be ensured to have an obvious correlation as much as possible. For example, at an intersection in a block, at the same time node, there is a certain ratio between turning vehicles and straight vehicles. For example, after long-term traffic volume statistics, within a period of time, the standard traffic volume of the straight lane always accounts for about 70%, the standard traffic volume of the left-turn road always accounts for 10%, and the standard traffic volume of the right-turn road always accounts for about 20%. This type can be called a clear correlation. In this way, a road and multiple roads extending from it can be combined together to be divided into the same block. As for the floating range of vehicle proportion, it is related to the accuracy of noise map display. With higher accuracy (such as a 10m*10m area), vehicles can be classified into one block if the allowable change is within 5%; with lower accuracy (such as a 20m*20m area), vehicles can be classified into one block if the allowable change is within 10%.

[0054] Optionally, since the standardized traffic volume of each road in the block has an obvious proportional relationship, the noise value of other locations can be inferred by simulation and other methods, and then the noise distribution of the entire block can be obtained. If the noise monitoring point in the block is set on the straight road, the noise monitoring result is a, in dB, and the corresponding standard traffic volume is about b, and the standard traffic volume of the left-turn road is about b / 2, then the equivalent noise level of the left-turn road is about a-3, in dB; and the standard traffic volume of the right-turn road is about b / 4, then the equivalent noise level of the right-turn road is about a-6, in dB, and the specific calculation method is: a+10*lg(X), where X is the magnification or reduction ratio of the standard traffic volume.

[0055] For example, the shapes and sizes of different blocks are not restricted, and there can be overlapping areas between different blocks. It should be pointed out that basically all adjacent blocks will overlap, because the noise impact will have a certain range, and the noise level in the overlapping area is jointly affected by the overlapping multiple blocks, and superposition calculation is required in the later stage to obtain a more accurate noise level.

[0056] S300: Determine a first noise level distribution of each road traffic sound source in a target area according to the standardized equivalent result and the position of each road traffic sound source.

[0057] S400: Determine a noise map of the target area at least according to the first noise level distribution.

[0058] For example, if there are no fixed equipment sound sources in the target area, the noise map of the target area can be drawn directly based on the first noise level distribution; if there are fixed equipment sound sources in the target area, the second noise level distribution of each fixed equipment sound source in the target area can be obtained after determining the first noise level distribution, and then the first noise level distribution and the second noise level distribution are superimposed and calculated to determine the noise map of the target area. This is conducive to greatly reducing the number of sound sources that need to be calculated in the model when drawing a complete noise map, and improving the calculation speed.

[0059] Figure 4 A city noise map drawn according to the first noise level distribution and the second noise level distribution is shown, wherein the redder the color, the higher the noise level. It can be seen that the noise level distribution shown in the map is basically consistent with the road distribution.

[0060] In some embodiments of the present application, at least two blocks in the target area have mutually overlapping positions, so before determining the first noise level distribution of each road traffic sound source in the target area, the method includes:

[0061] Get the noise contribution value of each block at the overlapping position;

[0062] The noise contribution value of each block at the overlapping position is superimposed and calculated to obtain the noise level at the overlapping position.

[0063] Exemplarily, the noise contribution value of each block at the overlapping position can be the noise level of the road traffic sound source of each block at the position, or it can be calculated by superimposing the noise levels of the road traffic sound source and the fixed equipment type sound source. Assuming that there are several blocks overlapping at a certain position in the target area, and the noise contribution values ​​of each block at this position are A, B, C..., then the noise level at the overlapping position is: 10*lg(10^(A / 10)+10^(B / 10)+10^(C / 10)+...). In the above manner, the overall noise distribution of the area in the case of block overlap can be calculated. It can be understood that the above superposition algorithm is also compatible with the situation where the blocks are not superimposed. For example, if only one block covers the position and the noise contribution value is A, then the noise level at the position is 10*lg(10^(A / 10))=A.

[0064] In some embodiments of the present application, the following steps may also be included:

[0065] S500, establishing a noise database for each block; wherein the noise database includes real-time noise distribution data of the block;

[0066] S600, in response to a noise update instruction, calling a noise database of a block;

[0067] S700: Superimpose and calculate the real-time noise distribution data of the noise database of each block to update the noise map.

[0068] For example, since the noise influence has a certain range, basically all adjacent blocks will overlap, so it is necessary to perform overlay calculation when updating the noise map. It is understandable that the block overlay algorithm is also compatible with the situation where blocks are not overlaid.

[0069] Optionally, step S500 may include the following steps:

[0070] S510, obtaining location information indicating the location of the block, real-time monitoring results of the noise monitoring point, and monitoring period information;

[0071] S520, updating the first noise level distribution of the block according to the real-time monitoring result of the noise monitoring point;

[0072] S530: Determine real-time noise distribution data of the block at least according to the updated first noise level distribution.

[0073] If there is no fixed equipment type sound source in the block, the real-time noise distribution data of the block can be directly determined based on the updated first noise level distribution; if there is a fixed equipment type sound source in the block, after obtaining the updated first noise level distribution, the second noise level distribution of each fixed equipment sound source in the block can be combined for superposition calculation to determine the real-time noise distribution data of the block.

[0074] Optionally, the noise database may also include location information of the block location, real-time monitoring results of the noise monitoring points, monitoring time period information, etc., which is conducive to real-time calculation and query of the noise level of a certain target location.

[0075] Optionally, the noise database can calculate the upper and lower limits of the monitoring results of all block noise monitoring points through prediction or long-term monitoring results, and establish the noise database based on this noise floating range.

[0076] In some embodiments of the present application, the above method further includes: if the number of sound sources in the target area changes, then a block is added at the location where the sound source increases / decreases, and a superposition calculation of the noise contribution value is performed to update the noise level at the location where the sound source increases / decreases. In this way, when the noise map needs to be updated due to a change in the sound source, only the noise level of the block at the location where the sound source changes can be adjusted, without adjusting the noise level of the entire area, thereby greatly improving the calculation speed.

[0077] like Figure 5 As shown, the embodiment of the present application also provides a noise map drawing device, including:

[0078] A classification module is configured to classify the sound sources in the target area according to preset sound source types, wherein the preset sound source types include road traffic sound sources and fixed equipment sound sources;

[0079] An equivalent module is configured to standardize and equate the noise level of each road traffic sound source;

[0080] A calculation module, configured to determine a first noise level distribution of each of the road traffic sound sources in the target area according to the standardized equivalent result;

[0081] A drawing module is configured to determine a noise map of the target area at least according to the first noise level distribution.

[0082] The noise map drawing device classifies the sound sources and standardizes the noise levels of road traffic sound sources, and then determines the first noise level distribution of each road traffic sound source in the target area based on the equivalent results, thereby determining the noise map of the target area. The above-mentioned standardized equivalent method is conducive to greatly shortening the calculation time and realizing the rapid drawing of the noise map. On this basis, when the noise map is dynamically updated, it is conducive to individually calculating and adjusting the classified sound sources, without calculating and adjusting all the sound sources in the target area according to the requirements of the traditional model, thereby realizing the rapid dynamic update of the noise map.

[0083] Exemplarily, the above-mentioned apparatus may also include a monitoring device for collecting noise values, and a display device for displaying a noise map, etc.

[0084] An embodiment of the present application further provides a computer-readable storage medium for storing a computer program, wherein the computer program enables a computer to execute the steps in the method described in any one of the aforementioned embodiments.

[0085] It should be noted that the numbers representing quantities or properties used to describe and claim certain embodiments of the present application should be understood to be modified by the terms "roughly", "about", "approximately" or "substantially" in some cases. For example, unless otherwise specified, "roughly", "about", "approximately" or "substantially" can indicate a ±20% variation of the value described. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of the present application are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0086] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0087] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A noise map drawing method, characterized in that: include: Classifying the sound sources in the target area according to preset sound source types; wherein the preset sound source types include road traffic sound sources and fixed equipment sound sources; Standardize and make equivalent the noise level of each road traffic sound source; Determine a first noise level distribution of each of the road traffic sound sources within the target area according to the standardized equivalent result and the position of each of the road traffic sound sources; A noise map of the target area is determined based on at least the first noise level distribution.

2. The method according to claim 1, characterized in that The step of determining the noise map of the target area at least according to the first noise level distribution comprises: Acquire a second noise level distribution of each fixed equipment sound source in the target area; The first noise level distribution and the second noise level distribution are superimposed and calculated to determine a noise map of the target area.

3. The method according to claim 1 or 2, characterized in that: Standardize and equilibrate the noise levels of various road traffic sound sources, including: Obtain the vehicle type, speed and traffic volume on each road; According to the noise contribution, the traffic flow of different types of vehicles at the corresponding speed limit on each road is equivalent to the standard traffic flow of vehicles of the preset type at the preset speed; The standardized equivalent result is determined according to the standard traffic volume of each road and the noise level of the reference position in the target area.

4. The method according to claim 3, characterized in that: The step of determining the standardized equivalent result according to the standard traffic volume of each road and the noise level at the reference position in the target area includes: Dividing the target area into a plurality of blocks according to the standard traffic flow of each road; wherein the standard traffic flow of each road in the blocks has a corresponding proportional relationship; Acquire noise monitoring results of noise monitoring points in each of the blocks; wherein the noise monitoring results are used to indicate the noise level of the noise monitoring points; Determine the noise level of other locations in each of the blocks according to the noise monitoring results of each of the blocks and the proportional relationship between the standard traffic volume of each road in each of the blocks; The first noise level distribution of each road traffic sound source in the target area is determined according to the noise level of each position in each block.

5. The method according to claim 4, characterized in that At least two blocks in the target area have mutually overlapping positions; Before determining the first noise level distribution of each of the road traffic sound sources in the target area, the method includes: Get the noise contribution value of each block at the overlapping position; The noise contribution value of each block at the overlapping position is superimposed and calculated to obtain the noise level at the overlapping position.

6. The method according to claim 5, characterized in that Also includes: Establishing a noise database for each of the blocks; wherein the noise database includes real-time noise distribution data of the blocks; In response to the noise update instruction, calling the noise database of the block; The real-time noise distribution data of the noise database of each block is superimposed and calculated to update the noise map.

7. The method according to claim 6, characterized in that The step of establishing a noise database for each of the blocks comprises: Acquire location information indicating the location of the block, real-time monitoring results of the noise monitoring point, and monitoring period information; Update the first noise level distribution of the block according to the real-time monitoring result of the noise monitoring point; The real-time noise distribution data of the block is determined at least according to the updated first noise level distribution.

8. The method according to claim 5, characterized in that Also includes: If the number of sound sources in the target area changes, an additional block is set at the location where the sound source increases / decreases, and a superposition calculation of the noise contribution value is performed to update the noise level at the location where the sound source increases / decreases.

9. A noise map drawing device, characterized in that: include: A classification module is configured to classify the sound sources in the target area according to preset sound source types, wherein the preset sound source types include road traffic sound sources and fixed equipment sound sources; An equivalent module is configured to standardize and equate the noise level of each road traffic sound source; A calculation module, configured to determine a first noise level distribution of each of the road traffic sound sources in the target area according to the standardized equivalent result; A drawing module is configured to determine a noise map of the target area at least according to the first noise level distribution.

10. A computer-readable storage medium, characterized in that: Used to store a computer program, wherein the computer program enables a computer to execute the steps of the method according to any one of claims 1 to 8.

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