Method, apparatus, computer device, and readable storage medium for determining sound pressure level after noise attenuation by multi-path diffraction of floating barrier

Abstract

The present application relates to the technical field of noise calculation, and provides a method, a device, a computer device and a readable storage medium for determining the sound pressure level after the multi-path diffraction attenuation of noise by a floating barrier. The method includes: obtaining the sound path differences of the noise diffraction paths in multiple directions passing through the floating barrier; obtaining the noise attenuation terms in multiple directions passing through the floating barrier according to the sound path differences of the noise diffraction paths in multiple directions; obtaining the comprehensive barrier attenuation term of the noise passing through the multi-path diffraction of the floating barrier according to the reciprocals of the noise attenuation terms in multiple directions; and obtaining the total sound pressure level after the multi-path diffraction attenuation of the noise source by the floating barrier. The sound pressure level after the noise attenuation calculated by the present method is relatively accurate.

Description

Technical Field

[0001] The present application relates to the technical field of noise calculation, and particularly to a method, device, computer device, computer-readable storage medium, and computer program product for determining the sound pressure level after the multi-path diffraction attenuation of noise through a floating barrier. Background Art

[0002] With the development of the economy and the improvement of people's living standards, the requirements for environmental protection are also increasing year by year, and reducing noise pollution is one of the measures to improve environmental protection. Therefore, in the initial stage of engineering construction, effectively calculating and evaluating the main noise is beneficial to controlling noise environmental pollution, thereby reducing the impact of noise on the physical and mental health of residents.

[0003] Currently, it is possible to calculate the sound pressure level after the attenuation of noise through a non-floating thin barrier or thick barrier. However, the existing calculation methods for the sound pressure level after the attenuation of noise are only suitable for calculating the sound pressure level after the attenuation of noise with less than 3 propagation paths, and cannot be directly used for calculating the sound pressure level after the attenuation of noise of a multi-diffraction floating barrier with 4 propagation paths in the up, down, left, and right directions. If forced to apply, when the acoustic path differences in the four propagation directions are all small, the error of the calculated sound pressure level after the attenuation of noise is large. Summary of the Invention

[0004] Based on this, in view of the above technical problems, it is necessary to provide a method, device, computer device, computer-readable storage medium, and computer program product for determining the sound pressure level after the multi-path diffraction attenuation of noise through a floating barrier.

[0005] In a first aspect, the present application provides a method for determining the sound pressure level after the multi-path diffraction attenuation of noise through a floating barrier, including:

[0006] Obtaining the acoustic path differences of the noise diffraction paths in multiple directions passing through the floating barrier;

[0007] Obtaining the noise attenuation terms in multiple directions passing through the floating barrier according to the acoustic path differences of the noise diffraction paths in the multiple directions;

[0008] Obtaining the noise comprehensive barrier attenuation term of the noise passing through the multi-path diffraction of the floating barrier according to the reciprocals of the noise attenuation terms in the multiple directions;

[0009] Obtaining the total sound pressure level after the multi-path diffraction attenuation of the noise source through the floating barrier according to the noise comprehensive barrier attenuation term.

[0010] In one of the embodiments, the obtaining the acoustic path differences of the noise diffraction paths in multiple directions passing through the floating barrier includes:

[0011] For any one of the multiple directions, obtaining the actual acoustic path of the noise source bypassing the floating barrier from the any one direction;

[0012] Obtain the straight-line distance from the position where the noise source is located to the receiving point;

[0013] According to the actual sound path of the noise source bypassing the floating barrier in any of the directions and the straight-line distance, obtain the sound path difference of the noise diffraction path in any of the directions.

[0014] In one embodiment, when the multiple directions include the upward direction and the downward direction, the upward direction is the direction away from the ground, and the downward direction is the direction close to the ground. Obtaining the actual sound paths of the noise source bypassing the floating barrier from the upward direction and the downward direction includes:

[0015] Obtain the straight-line distance segment from the receiving point to the position where the noise source is located and the first direction vector from the receiving point to the position where the noise source is located;

[0016] Obtain several barrier segments included in the floating barrier and the corresponding second direction vectors of the several barrier segments;

[0017] According to the first direction vector and the second direction vector, obtain several intersection points of the straight-line distance segment and the barrier segment;

[0018] According to the several intersection points, obtain the actual sound paths of the noise source bypassing the floating barrier from the upward direction and the downward direction.

[0019] In one embodiment, when the multiple directions include the left direction and the right direction, the left direction is one end of the line perpendicular to the up-down connection line, and the right direction is the other end of the line perpendicular to the up-down connection line. The up-down connection line is the connection line between the upward direction and the downward direction. Obtaining the actual sound paths of the noise source bypassing the floating barrier from the left direction and the right direction includes:

[0020] Obtain the straight-line distance segment from the receiving point to the position where the noise source is located;

[0021] Taking the straight-line distance segment as the dividing line, divide the endpoints included in the floating barrier into a left-side point group and a right-side point group;

[0022] Screen from the left-side point group and the right-side point group to obtain the endpoints included in the diffraction paths in the left direction and the right direction;

[0023] According to the endpoints included in the diffraction paths in the left direction and the right direction, obtain the actual sound paths of the noise source bypassing the floating barrier from the left direction and the right direction.

[0024] In one embodiment, the multiple directions include the upward direction, the left direction, the right direction, and the downward direction. Obtaining the noise attenuation terms in multiple directions passing through the floating barrier according to the sound path differences of the noise diffraction paths in the multiple directions includes:

[0025] Obtain the diffraction distances of the noise diffraction paths in the upward, leftward, rightward, and downward directions between their respective first diffraction boundaries and last diffraction boundaries;

[0026] According to the sound path difference, diffraction distance, and meteorological influence factor of the noise diffraction path in the upward direction, obtain the noise attenuation term in the upward direction;

[0027] According to the sound path differences and diffraction distances of the noise diffraction paths in the leftward, rightward, and downward directions, obtain the noise attenuation terms in the leftward, rightward, and downward directions.

[0028] In one embodiment, the obtaining the total sound pressure level after the multi-path diffraction attenuation of the noise source through the floating barrier according to the noise comprehensive barrier attenuation term includes:

[0029] Obtain the sound power of the noise source;

[0030] According to the sound power and the noise comprehensive barrier attenuation term, obtain the total sound pressure level after the multi-path diffraction attenuation of the noise source through the floating barrier.

[0031] In a second aspect, the present application further provides a device for determining the sound pressure level after the multi-path diffraction attenuation of noise through a floating barrier, including:

[0032] A sound path difference acquisition module, configured to acquire the sound path differences of the noise diffraction paths in multiple directions passing through the floating barrier;

[0033] A noise attenuation term acquisition module, configured to obtain the noise attenuation terms in multiple directions passing through the floating barrier according to the sound path differences of the noise diffraction paths in the multiple directions;

[0034] A comprehensive barrier attenuation term acquisition module, configured to obtain the noise comprehensive barrier attenuation term for the multi-path diffraction of the noise passing through the floating barrier according to the reciprocals of the noise attenuation terms in the multiple directions;

[0035] A total sound pressure level acquisition module, configured to obtain the total sound pressure level after the multi-path diffraction attenuation of the noise source through the floating barrier according to the noise comprehensive barrier attenuation term.

[0036] In a third aspect, the present application further provides a computer device. The computer device includes a memory and a processor, the memory stores a computer program, and the processor executes the above method.

[0037] In a fourth aspect, the present application further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and the computer program is executed by the processor to implement the above method.

[0038] Fifth aspect, the present application also provides a computer program product. The computer program product includes a computer program, and the computer program is executed by a processor to implement the above method.

[0039] The method, device, computer device, computer-readable storage medium and computer program product for determining the sound pressure level after the noise is attenuated by multi-path diffraction of a floating barrier obtain the acoustic path differences of the noise diffraction paths in multiple directions passing through the floating barrier; according to the acoustic path differences of the noise diffraction paths in multiple directions, obtain the noise attenuation terms in multiple directions passing through the floating barrier; according to the noise attenuation terms in multiple directions, obtain the comprehensive barrier attenuation term of the noise passing through the multi-path diffraction of the floating barrier; according to the comprehensive barrier attenuation term of the noise, obtain the total sound pressure level after the noise source is attenuated by the multi-path diffraction of the floating barrier. The present application takes into account the influence of the diffraction paths in multiple directions of the floating barrier, and according to the noise attenuation terms in multiple directions, obtains the comprehensive barrier attenuation term of the noise passing through the multi-path diffraction of the floating barrier; according to the comprehensive barrier attenuation term of the noise, the total sound pressure level after the noise source is attenuated by the multi-path diffraction of the floating barrier can be obtained, which is applicable to the calculation of the sound pressure level after the noise attenuation of a multi-diffraction floating barrier with 4 propagation paths in the up, down, left and right directions, and when the acoustic path differences in the four propagation directions are all small, the calculated sound pressure level after the noise attenuation is relatively accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments of the present application or related technologies. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0041] Figure 1 It is an application environment diagram of the method for determining the sound pressure level after the noise is attenuated by multi-path diffraction of a floating barrier in an embodiment;

[0042] Figure 2 It is a schematic flowchart of the method for determining the sound pressure level after the noise is attenuated by multi-path diffraction of a floating barrier in an embodiment;

[0043] Figure 3 It is a schematic diagram of the multi-path diffraction of noise by a floating barrier in an embodiment;

[0044] Figure 4 It is another schematic diagram of the multi-path diffraction of noise by a floating barrier in an embodiment;

[0045] Figure 5 It is the horizontal plane noise distribution cloud map and vertical plane noise distribution cloud map of a noise source in an embodiment;

[0046] Figure 6 3D schematic diagram of noise multi-path diffraction through a floating barrier in an embodiment;

[0047] Figure 7 Structural block diagram of a device for determining the sound pressure level after noise multi-path diffraction attenuation through a floating barrier in an embodiment;

[0048] Figure 8 Internal structure diagram of a computer device in an embodiment. Detailed implementation manners

[0049] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0050] The embodiment of the present application provides a method for determining the sound pressure level after noise multi-path diffraction attenuation through a floating barrier. This embodiment can be executed by a computer device, such as Figure 1 shown, the computer device can obtain the sound path difference of the noise diffraction paths in multiple directions passing through the floating barrier, and then obtain the total sound pressure level after the noise source passes through the multi-path diffraction attenuation of the floating barrier. It can be understood that the computer device can be implemented through a server, or through a terminal, or through an interaction system between the terminal and the server. In this embodiment, the method includes Figure 2 the steps shown:

[0051] Step S201: Obtain the sound path difference of the noise diffraction paths in multiple directions passing through the floating barrier.

[0052] The floating barrier (multi-diffraction barrier) can block the direct propagation of noise, allowing the noise to bypass the floating barrier in multiple directions, thereby effectively attenuating the noise. Among them, the multiple directions can include the upper direction, the left direction, the right direction, and the lower direction.

[0053] For any one of the multiple directions, the path formed when the noise propagates around the floating barrier from any one direction is called the noise diffraction path in that any one direction.

[0054] The distance difference between the noise diffraction path in any one direction and the direct path from the position of the noise source to the receiving point is called the sound path difference of the noise diffraction path in any one direction.

[0055] The sound path difference of the noise diffraction paths in multiple directions passing through the floating barrier can be obtained.

[0056] Step S202: Obtain the noise attenuation terms in multiple directions passing through the floating barrier according to the sound path differences of the noise diffraction paths in multiple directions.

[0057] For any one of multiple directions, based on the sound path difference of the noise diffraction path in the any one direction, the noise attenuation terms in multiple directions passing through the floating barrier can be obtained.

[0058] Step S203: Obtain the comprehensive barrier attenuation term of the noise passing through the multi-path diffraction of the floating barrier according to the reciprocals of the noise attenuation terms in multiple directions.

[0059] The energy superposition of the noise attenuation terms in multiple directions can be performed to obtain the comprehensive barrier attenuation term of the noise passing through the multi-path diffraction of the floating barrier.

[0060] When the multiple directions include the upward direction, the left direction, the right direction, and the downward direction, the energy superposition of the noise attenuation terms in the upward direction, the left direction, the right direction, and the downward direction can be performed. Specifically, the sum of the reciprocals of the noise attenuation terms in the upward direction, the left direction, the right direction, and the downward direction can be used as the comprehensive barrier attenuation term of the noise passing through the multi-path diffraction of the floating barrier. The calculation formula of the comprehensive barrier attenuation term of the noise is shown in Equation (1).

[0061] (1)

[0062] Where λ is the wavelength of the sound wave, with the unit of m; is the comprehensive barrier attenuation term of the noise passing through the multi-path diffraction of the floating barrier, the noise attenuation term in the upward direction , the noise attenuation term in the left direction , the noise attenuation term in the right direction , the noise attenuation term in the downward direction , is the sound path difference of the noise diffraction path in the i-th direction, with the unit of m; Kmet is the meteorological influence factor, The calculation formula of is shown in Equation (2).

[0063] (2)

[0064] Where is the diffraction distance between the first diffraction boundary and the last diffraction boundary in the noise diffraction path in the i-th direction, with the unit of m.

[0065] Step S204: Obtain the total sound pressure level of the noise source after multi-path diffraction attenuation through the floating barrier according to the comprehensive barrier attenuation term of the noise.

[0066] If the noise source contains multiple octave bands, the comprehensive barrier attenuation terms of the noise in each frequency band need to be calculated separately. Finally, the energy superposition of the sound pressure levels in multiple octave bands needs to be performed, that is, according to the sound power in multiple octave bands and the comprehensive barrier attenuation term of the noise, the total sound pressure level of the noise source after multi-path diffraction attenuation through the floating barrier is obtained.

[0067] In the method for determining the sound pressure level after the above noise is attenuated by multi-path diffraction of the floating barrier, considering the influence of the diffraction paths in multiple directions of the floating barrier, according to the noise attenuation terms in multiple directions, the comprehensive barrier attenuation term of the noise passing through the multi-path diffraction of the floating barrier is obtained; according to the comprehensive barrier attenuation term of the noise, the total sound pressure level after the noise source is attenuated by the multi-path diffraction of the floating barrier can be obtained, which is applicable to the calculation of the sound pressure level after the noise attenuation of the multi-diffraction floating barrier with 4 propagation paths in the up, down, left, and right directions, and when the sound path differences in the four propagation directions are relatively small, the calculated sound pressure level after the noise attenuation is relatively accurate.

[0068] In one embodiment, the sound path differences of the noise diffraction paths in multiple directions passing through the floating barrier are obtained, and the specific steps are as follows: for any one of the multiple directions, obtain the actual sound path of the noise source bypassing the floating barrier from any one direction; obtain the straight-line distance from the position where the noise source is located to the receiving point; according to the actual sound path of the noise source bypassing the floating barrier from any one direction and the straight-line distance, obtain the sound path difference of the noise diffraction path in any one direction.

[0069] For any one of the multiple directions, the actual sound path of the noise source bypassing the floating barrier from any one direction can be obtained. The distance from the position where the noise source is located to the receiving point can be obtained.

[0070] According to the actual sound path of the noise source bypassing the floating barrier from any one direction and the straight-line distance from the position where the noise source is located to the receiving point, the sound path difference of the noise diffraction path in any one direction can be obtained, as shown in Equation (3).

[0071] (3)

[0072] Among them, is the actual sound path of the noise bypassing the floating barrier from the i-th direction, with the unit of m; is the straight-line distance from the position where the noise source is located to the receiving point, with the unit of m. If the connection line from the noise source to the receiving point is not blocked by the floating barrier, the sound path difference δ takes a negative value.

[0073] In this embodiment, for any one of the multiple directions, according to the actual sound path of the noise source bypassing the floating barrier from any one direction and the straight-line distance, the sound path difference of the noise diffraction path in any one direction can be obtained quickly and accurately.

[0074] In one embodiment, when the multiple directions include the upward direction and the downward direction, the upward direction is the direction away from the ground, and the downward direction is the direction close to the ground. The specific steps to obtain the actual sound paths of the noise source bypassing the floating barrier from the upward direction and the downward direction are as follows: Obtain the straight-line distance segment from the receiving point to the position of the noise source and the first direction vector from the receiving point to the position of the noise source; Obtain several barrier segments included in the floating barrier and the corresponding second direction vectors of the several barrier segments; According to the first direction vector and the second direction vector, obtain several intersection points of the straight-line distance segment and the barrier segments; According to the several intersection points, obtain the actual sound paths of the noise source bypassing the floating barrier from the upward direction and the downward direction.

[0075] A schematic diagram of the multi-path diffraction of noise through a floating barrier is as Figure 3 shown, where S is the position of the noise source and R is the receiving point; is the direction away from the ground, called the upward direction, is the direction close to the ground, called the downward direction; The connection line between the upward direction and the downward direction can be called the up-down connection line, is one end of the line perpendicular to the up-down connection line, called the left direction, is the other end of the line perpendicular to the up-down connection line, called the right direction.

[0076] Another schematic diagram of the multi-path diffraction of noise through a floating barrier is as Figure 4 shown, and the straight-line distance segment from the receiving point to the position of the noise source P R P S can be obtained. The straight-line distance segment P R P S can be called the scanning line. The straight-line distance segment P R P S can be expressed as , where in the formula, P R is the coordinate (x0, y0, z0) of the receiving point, is the first direction vector from the receiving point P R to the position of the noise source P S , and s is a real number.

[0077] Several barrier segments P included in the floating barrier can be obtained i P i+1 . The barrier segment P i P i+1 can be expressed as , where is the second direction vector corresponding to the barrier segment i, and t is a real number.

[0078] The cross product between the first direction vector and the second direction vector can be obtained according to Whether it is non - zero, to determine whether the straight - line distance segment intersects each barrier segment. When the cross - product equals zero, it represents that the first direction vector and the second direction vector are parallel or coincident. At this time, the straight - line distance segment does not intersect the barrier segment i. When the cross - product is non - zero, it represents that the first direction vector and the second direction vector are non - parallel and non - coincident. At this time, the straight - line distance segment intersects the barrier segment i.

[0079] Among them, the cross - product operation formula of vectors is shown in Equation (4).

[0080] (4)

[0081] When the straight - line distance segment intersects the barrier segment, several intersection points of the straight - line distance segment and the barrier segment can be obtained according to Equation (5). .

[0082] (5)

[0083] In the formula, , is the i - th endpoint of the floating barrier.

[0084] According to several intersection points , the actual sound paths by which the noise source bypasses the floating barrier from the upper and lower directions can be obtained.

[0085] In this embodiment, according to the first direction vector from the receiving point to the position of the noise source and the second direction vectors corresponding to several barrier segments included in the floating barrier, several intersection points of the straight - line distance segment and the barrier segment are obtained; according to several intersection points, the actual sound paths by which the noise source bypasses the floating barrier from the upper and lower directions can be obtained more accurately.

[0086] In one of the embodiments, when multiple directions include the left direction and the right direction, the left direction is one end of the line perpendicular to the up - and - down connection line, the right direction is the other end of the line perpendicular to the up - and - down connection line, and the up - and - down connection line is the connection line between the upper direction and the lower direction. To obtain the actual sound paths by which the noise source bypasses the floating barrier from the left and right directions, the specific steps are as follows: obtain the straight - line distance segment from the receiving point to the position of the noise source; divide the endpoints included in the floating barrier into a left - side point group and a right - side point group with the straight - line distance segment as the dividing line; screen from the left - side point group and the right - side point group to obtain the endpoints included in the diffraction paths in the left and right directions; according to the endpoints included in the diffraction paths in the left and right directions, obtain the actual sound paths by which the noise source bypasses the floating barrier from the left and right directions.

[0087] The schematic diagram of the multi-path diffraction of noise through a floating barrier is as follows Figure 3 shown, where S is the position of the noise source and R is the receiving point; is the direction away from the ground, called the upward direction, is the direction close to the ground, called the downward direction; the line connecting the upward direction and the downward direction can be called the up-down connection line, is one end of the line perpendicular to the up-down connection line, called the left direction, is the other end of the line perpendicular to the up-down connection line, called the right direction.

[0088] The straight-line distance segment P from the receiving point to the position of the noise source can be obtained R P S Taking the straight-line distance segment P R P S as the dividing line, according to the floating barrier endpoints on the left side of the straight-line distance segment P R P S the left-side point group U is obtained 左m According to the floating barrier endpoints on the right side of the straight-line distance segment P R P S the right-side point group U is obtained 右k .

[0089] According to the relative positions between the position S of the noise source and the receiving point R and the positions of the points in the left-side point group U 左m , screening from the left-side point group, the endpoints included in the diffraction path in the left direction are obtained.

[0090] According to the relative positions between the position S of the noise source and the receiving point R and the positions of the points in the right-side point group U 右k , screening from the right-side point group, the endpoints included in the diffraction path in the right direction are obtained.

[0091] According to the endpoints included in the diffraction paths in the left direction and the right direction, the actual sound paths by which the noise source bypasses the floating barrier from the left direction and the right direction are obtained.

[0092] In this embodiment, according to the straight-line distance segment from the receiving point to the position of the noise source, the endpoints included in the floating barrier are divided into a left-side point group and a right-side point group; screening from the left-side point group and the right-side point group, the endpoints included in the diffraction paths in the left direction and the right direction are obtained, so as to obtain the actual sound paths by which the noise source bypasses the floating barrier from the left direction and the right direction more accurately.

[0093] In one embodiment, the multiple directions include the upward direction, the left direction, the right direction, and the downward direction. According to the sound path differences of the noise diffraction paths in the multiple directions, the noise attenuation terms in the multiple directions passing through the floating barrier are obtained. The specific steps are as follows: Obtain the diffraction distances between the respective first diffraction boundaries and the last diffraction boundaries of the noise diffraction paths in the upward direction, the left direction, the right direction, and the downward direction; According to the sound path difference, the diffraction distance, and the meteorological influence factor of the noise diffraction path in the upward direction, obtain the noise attenuation term in the upward direction; According to the sound path differences and the diffraction distances of the noise diffraction paths in the left direction, the right direction, and the downward direction, obtain the noise attenuation terms in the left direction, the right direction, and the downward direction.

[0094] The diffraction distances e1, e2, e3, and e4 between the respective first diffraction boundaries and the last diffraction boundaries of the noise diffraction paths in the upward direction, the left direction, the right direction, and the downward direction can be obtained.

[0095] According to the sound path difference, the diffraction distance, and the meteorological influence factor of the noise diffraction path in the upward direction, the noise attenuation term in the upward direction can be obtained, as shown in Equation (6).

[0096] (6)

[0097] In the formula, is the noise attenuation term in the upward direction, is the sound path difference of the noise diffraction path in the upward direction, K met is the meteorological influence factor, The calculation formula of is as shown in Equation (2).

[0098] According to the sound path differences and the diffraction distances of the noise diffraction paths in the left direction, the right direction, and the downward direction, the noise attenuation terms in the left direction, the right direction, and the downward direction are obtained, as shown in Equation (7), Equation (8), and Equation (9) respectively.

[0099] (7)

[0100] (8)

[0101] (9)

[0102] In the formula, is the noise attenuation term in the left direction, is the noise attenuation term in the right direction, is the noise attenuation term in the downward direction, is the sound path difference of the noise diffraction path in the left direction, is the sound path difference of the noise diffraction path in the right direction, is the sound path difference of the noise diffraction path in the downward direction, 、 and The calculation formula is as shown in Equation (2).

[0103] In this embodiment, based on the sound path difference, diffraction distance, and meteorological influence factors of the noise diffraction path in the upward direction, a relatively accurate noise attenuation term in the upward direction can be obtained; based on the sound path difference and diffraction distance of the noise diffraction paths in the left, right, and downward directions, relatively accurate noise attenuation terms in the left, right, and downward directions can be obtained.

[0104] In one of the embodiments, based on the noise comprehensive barrier attenuation term, the total sound pressure level after the multi-path diffraction attenuation of the noise source through the floating barrier is obtained. The specific steps are as follows: Obtain the sound power of the noise source; based on the sound power and the noise comprehensive barrier attenuation term, obtain the total sound pressure level after the multi-path diffraction attenuation of the noise source through the floating barrier.

[0105] The previous calculation formula calculates the noise attenuation terms in multiple directions of the floating barrier for a certain octave band, and obtains the noise comprehensive barrier attenuation term for a certain octave band. If the noise source contains multiple octave bands, the noise comprehensive barrier attenuation terms for each frequency band need to be calculated separately. Finally, the sound pressure levels of multiple octave bands need to be energy-summed, that is, based on the sound powers and noise comprehensive barrier attenuation terms of multiple octave bands, the total sound pressure level after the multi-path diffraction attenuation of the noise source through the floating barrier is obtained. The calculation formula is as shown in Equation (10).

[0106] (10)

[0107] In the formula, is the total sound pressure level after the multi-path diffraction attenuation of the noise source through the floating barrier, j is the serial number of 8 octave bands from 63 Hz to 8000 Hz, L w is the sound power of the noise source, is the noise comprehensive barrier attenuation term. In this embodiment, based on the sound power and the noise comprehensive barrier attenuation term, a relatively accurate total sound pressure level after the multi-path diffraction attenuation of the noise source through the floating barrier is obtained.

[0108] According to the method for determining the sound pressure level after the multi-path diffraction attenuation of the noise through the floating barrier provided by this application, the total sound pressure level after the multi-path diffraction attenuation of the noise source through the floating barrier can be calculated, the horizontal plane noise distribution cloud map and vertical plane noise distribution cloud map of the noise source can be obtained, as Figure 5 shown, and a three-dimensional schematic diagram of the multi-path diffraction of the noise through the floating barrier can also be obtained, as Figure 6 shown.

[0109] It should be understood that although the steps in the flowcharts involved in the above-described embodiments are sequentially shown according to the indications of the arrows, these steps are not necessarily executed sequentially in the order indicated by the arrows. Unless there is a clear indication in this document, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-described embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same moment, but can be executed at different moments, and the execution order of these steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of the steps or stages in other steps or other steps.

[0110] Based on the same inventive concept, an embodiment of the present application further provides a device for determining the sound pressure level after multi-path diffraction attenuation of noise through a floating barrier, which is used to implement the method for determining the sound pressure level after multi-path diffraction attenuation of noise involved above. The solution provided by this device to solve the problem is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the device for determining the sound pressure level after multi-path diffraction attenuation of noise provided below can refer to the limitations on the method for determining the sound pressure level after multi-path diffraction attenuation of noise in the above text, and will not be repeated here.

[0111] In an exemplary embodiment, as Figure 7 shown, a device for determining the sound pressure level after multi-path diffraction attenuation of noise is provided, where:

[0112] The sound path difference acquisition module 701 is configured to acquire the sound path differences of the noise diffraction paths in multiple directions passing through the floating barrier;

[0113] The noise attenuation term acquisition module 702 is configured to obtain the noise attenuation terms in multiple directions passing through the floating barrier according to the sound path differences of the noise diffraction paths in the multiple directions;

[0114] The comprehensive barrier attenuation term acquisition module 703 is configured to obtain the comprehensive barrier attenuation term of the noise passing through multi-path diffraction of the floating barrier according to the reciprocals of the noise attenuation terms in the multiple directions;

[0115] The total sound pressure level acquisition module 704 is configured to obtain the total sound pressure level after multi-path diffraction attenuation of the noise source through the floating barrier according to the comprehensive barrier attenuation term of the noise.

[0116] In one embodiment, the sound path difference acquisition module 701 is further configured to: for any one of multiple directions, acquire the actual sound path of the noise source bypassing the floating barrier from the any one of the directions; acquire the straight-line distance from the position where the noise source is located to the receiving point; and obtain the sound path difference of the noise diffraction path in the any one of the directions according to the actual sound path of the noise source bypassing the floating barrier from the any one of the directions and the straight-line distance.

[0117] In one embodiment, when the multiple directions include an upward direction and a downward direction, the upward direction is the direction away from the ground, and the downward direction is the direction close to the ground. The sound path difference acquisition module 701 is further configured to: acquire the straight-line distance line segment from the receiving point to the position where the noise source is located and the first direction vector from the receiving point to the position where the noise source is located; acquire several barrier line segments included in the floating barrier and the second direction vectors corresponding to the several barrier line segments; obtain several intersection points of the straight-line distance line segment and the barrier line segments according to the first direction vector and the second direction vectors; and obtain the actual sound paths of the noise source bypassing the floating barrier from the upward direction and the downward direction according to the several intersection points.

[0118] In one embodiment, when the multiple directions include a left direction and a right direction, the left direction is one end of a line perpendicular to the upper-lower connection line, and the right direction is the other end of the line perpendicular to the upper-lower connection line. The upper-lower connection line is the connection line between the upward direction and the downward direction. The sound path difference acquisition module 701 is further configured to: acquire the straight-line distance line segment from the receiving point to the position where the noise source is located; divide the end points included in the floating barrier into a left-side point group and a right-side point group with the straight-line distance line segment as the dividing line; screen from the left-side point group and the right-side point group to obtain the end points included in the diffraction paths in the left direction and the right direction; and obtain the actual sound paths of the noise source bypassing the floating barrier from the left direction and the right direction according to the end points included in the diffraction paths in the left direction and the right direction.

[0119] In one embodiment, when the multiple directions include an upward direction, a left direction, a right direction, and a downward direction, the comprehensive barrier attenuation term acquisition module 703 is further configured to: acquire the diffraction distances of the noise diffraction paths in the upward direction, the left direction, the right direction, and the downward direction between their first diffraction boundaries and last diffraction boundaries; obtain the noise attenuation term in the upward direction according to the sound path difference, the diffraction distance, and the meteorological influence factor of the noise diffraction path in the upward direction; and obtain the noise attenuation terms in the left direction, the right direction, and the downward direction according to the sound path differences and the diffraction distances of the noise diffraction paths in the left direction, the right direction, and the downward direction.

[0120] In one embodiment, the total sound pressure level acquisition module 704 is further configured to: acquire the sound power of the noise source; and obtain the total sound pressure level of the noise source after multi-path diffraction attenuation by the floating barrier according to the sound power and the noise comprehensive barrier attenuation term.

[0121] Each module in the device for determining the sound pressure level after the above noise is attenuated by multi-path diffraction through a floating barrier can be implemented in whole or in part by software, hardware, or a combination thereof. Each of the above modules can be embedded in the processor of the computer device in hardware form or be independent of it, or can be stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to each of the above modules.

[0122] In an exemplary embodiment, a computer device is provided. The computer device can be a server, and its internal structure diagram can be as Figure 8 shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O), and a communication interface. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data of embodiments of the method for determining the sound pressure level after the noise is attenuated by multi-path diffraction through a floating barrier. The input / output interface of the computer device is used for exchanging information between the processor and external devices. The communication interface of the computer device is used for communicating with external terminals through a network connection. When the computer program is executed by the processor, it implements a method for determining the sound pressure level after the noise is attenuated by multi-path diffraction through a floating barrier.

[0123] Those skilled in the art can understand that Figure 8 the structure shown in

[0124] is only a block diagram of some structures related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have a different component layout.

[0125] In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, it implements the steps in the above method embodiments.

[0126] In an embodiment, a computer program product is provided, including a computer program. When the computer program is executed by a processor, it implements the steps in the above method embodiments.

[0127] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in this application are all information and data that have been authorized by the user or fully authorized by all parties, and the collection, use, and processing of relevant data need to comply with relevant regulations.

[0128] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the embodiments provided in this application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., and are not limited thereto. The processors involved in the embodiments provided in this application can be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, data processing logics based on quantum computing, artificial intelligence (AI) processors, etc., and are not limited thereto.

[0129] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this application.

[0130] The above-described embodiments merely represent several implementation manners of this application. The description is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of this application. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can still be made, and these all belong to the protection scope of this application. Therefore, the protection scope of this application shall be subject to the appended claims.

Claims

1. A method for determining the sound pressure level of noise after multi-path diffraction attenuation of a floating barrier, characterized in that: The method comprises: For any one of a plurality of directions, obtaining an actual sound path of the noise source bypassing the floating barrier from the any one direction; the plurality of directions include an upward direction, a left direction, a right direction, and a downward direction; Get the straight-line distance from the noise source to the receiving point; Obtaining a sound path difference of a noise diffraction path in any direction according to an actual sound path of the noise source bypassing the floating barrier from any direction and the straight-line distance; Obtain the diffraction distances of the noise diffraction paths in the upward direction, the left direction, the right direction, and the downward direction between the first diffraction boundary and the last diffraction boundary of each; According to the sound path difference of the noise diffraction path in the upward direction, the diffraction distance and the meteorological influence factor, the noise attenuation term in the upward direction is obtained; According to the sound path difference and diffraction distance of the noise diffraction path in the left direction, the right direction and the downward direction, the noise attenuation items in the left direction, the right direction and the downward direction are obtained; According to the inverse of the noise attenuation terms in the multiple directions, a comprehensive barrier attenuation term of noise passing through multi-path diffraction of the floating barrier is obtained; According to the sound power of the noise source and the noise comprehensive barrier attenuation term, the total sound pressure level of the noise source after multi-path diffraction attenuation of the floating barrier is obtained.

2. The method according to claim 1, characterized in that The upward direction is a direction away from the ground, and the downward direction is a direction close to the ground. The actual sound path of the noise source bypassing the floating barrier from the upward direction and the downward direction is obtained, including: Obtaining a straight-line distance segment from the receiving point to the location of the noise source and a first direction vector from the receiving point to the location of the noise source; Acquire a plurality of barrier line segments contained in the floating barrier and second direction vectors corresponding to the plurality of barrier line segments; When the straight distance line segment intersects with the barrier line segment, a plurality of intersection points of the straight distance line segment and the barrier line segment are obtained according to the first direction vector and the second direction vector; According to the plurality of intersection points, the actual sound path of the noise source bypassing the floating barrier from the upper direction and the lower direction is obtained.

3. The method according to claim 2, characterized in that Before obtaining a plurality of intersection points of the straight-line distance segment and the barrier segment according to the first direction vector and the second direction vector when the straight-line distance segment intersects the barrier segment, the method further includes: Determining whether the straight distance line segment intersects the barrier line segment according to whether the cross product between the first direction vector and the second direction vector is non-zero; When the cross product is equal to zero, it indicates that the first direction vector and the second direction vector are parallel or coincident, and the straight distance line segment does not intersect with the barrier line segment; When the cross product is non-zero, it indicates that the first direction vector and the second direction vector are non-parallel and non-coincident, and the straight distance line segment intersects with the barrier line segment.

4. The method according to claim 1, characterized in that The left direction is one end of a line perpendicular to the upper and lower lines, and the right direction is the other end of a line perpendicular to the upper and lower lines. The upper and lower lines are the lines between the upper direction and the lower direction. The actual sound path of the noise source bypassing the floating barrier from the left direction and the right direction is obtained, including: Obtain the straight-line distance segment from the receiving point to the location of the noise source; Using the straight distance line segment as a dividing line, the endpoints contained in the floating barrier are divided into a left point group and a right point group; Filter from the left point group and the right point group to obtain endpoints included in the diffraction paths in the left direction and the right direction; According to the endpoints included in the diffraction paths in the left and right directions, the actual sound path of the noise source bypassing the floating barrier from the left and right directions is obtained.

5. A device for determining the sound pressure level of noise after multi-path diffraction attenuation of a floating barrier, characterized in that: The device comprises: The sound path difference acquisition module is used to acquire the actual sound path of the noise source bypassing the floating barrier from any direction in a plurality of directions; the plurality of directions include upward, left, right and downward directions; acquire the straight-line distance from the location of the noise source to the receiving point; and obtain the sound path difference of the noise diffraction path in any direction according to the actual sound path of the noise source bypassing the floating barrier from any direction and the straight-line distance; A noise attenuation item acquisition module is used to obtain the diffraction distances of the noise diffraction paths in the upper, left, right and lower directions between the first diffraction boundary and the last diffraction boundary of each; obtain the noise attenuation item in the upper direction according to the sound path difference, diffraction distance and meteorological influence factor of the noise diffraction path in the upper direction; obtain the noise attenuation items in the left, right and lower directions according to the sound path difference and diffraction distance of the noise diffraction paths in the left, right and lower directions; A comprehensive barrier attenuation item acquisition module, used to obtain a comprehensive barrier attenuation item of noise through multi-path diffraction of a floating barrier according to the inverse of the noise attenuation items in the multiple directions; The total sound pressure level acquisition module is used to obtain the total sound pressure level of the noise source after multi-path diffraction attenuation of the floating barrier according to the sound power of the noise source and the noise comprehensive barrier attenuation item.

6. The device according to claim 5, characterized in that The upward direction is the direction away from the ground, and the downward direction is the direction close to the ground. The sound path difference acquisition module is also used to: obtain the straight-line distance segment from the receiving point to the location of the noise source and the first direction vector from the receiving point to the location of the noise source; obtain a number of barrier segments contained in the floating barrier and the second direction vectors corresponding to the several barrier segments; when the straight-line distance segment intersects with the barrier segment, according to the first direction vector and the second direction vector, obtain a number of intersection points of the straight-line distance segment and the barrier segment; according to the several intersection points, obtain the actual sound path of the noise source bypassing the floating barrier from the upper direction and the lower direction.

7. The device according to claim 5, characterized in that The left direction is one end of a line perpendicular to the upper and lower lines, and the right direction is the other end of a line perpendicular to the upper and lower lines, the upper and lower lines are the lines between the upper direction and the lower direction, and the sound path difference acquisition module is also used to: obtain a straight-line distance segment from the receiving point to the location of the noise source; use the straight-line distance segment as a dividing line to divide the endpoints contained in the floating barrier into a left point group and a right point group; filter from the left point group and the right point group to obtain the endpoints included in the diffraction paths in the left and right directions; and obtain the actual sound path of the noise source bypassing the floating barrier from the left and right directions based on the endpoints included in the diffraction paths in the left and right directions.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 4 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 4 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 4 are implemented.

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