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

Abstract

The invention relates to the technical field of noise calculation, and provides a method and device for determining the sound pressure level of noise after multi-path diffraction attenuation of a floating barrier, computer equipment and a readable storage medium. The method comprises the following steps: acquiring sound path distance differences of noise diffraction paths passing through the floating barrier in multiple directions; according to the sound path distance differences of the noise diffraction paths in the multiple directions, noise attenuation items in the multiple directions passing through the floating barrier are obtained; according to the reciprocals of the noise attenuation items in the multiple directions, a noise comprehensive barrier attenuation item diffracted through multiple paths of the floating barrier is obtained; and according to the noise comprehensive barrier attenuation item, obtaining the total sound pressure level of the noise source after multi-path diffraction attenuation of the floating barrier. The sound pressure level obtained after noise attenuation and calculated through the method is accurate.

Description

Technical Field

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

[0002] With the development of 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 early stage of project construction, effective calculation and evaluation of major noise is conducive to controlling noise environmental pollution, thereby reducing the impact of noise on residents' physical and mental health.

[0003] At present, the sound pressure level of noise after attenuation by a non-suspended thin barrier or a thick barrier can be calculated. However, the existing method for calculating the sound pressure level after noise attenuation is only suitable for calculating the sound pressure level after noise attenuation with less than three propagation paths, and cannot be directly used for calculating the sound pressure level after noise attenuation of a multi-diffraction suspended barrier with four propagation paths, namely, up, down, left, and right. If it is forcibly applied, when the sound path differences in the four propagation directions are small, the error of the calculated sound pressure level after noise attenuation is large. Summary of the invention

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

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

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

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

[0008] 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;

[0009] According to the noise comprehensive barrier attenuation item, the total sound pressure level of the noise source after multi-path diffraction attenuation of the floating barrier is obtained.

[0010] In one embodiment, 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 an actual sound path of the noise source bypassing the floating barrier from the any one direction;

[0012] Get the straight-line distance from the noise source to the receiving point;

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

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

[0015] 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;

[0016] Acquire a plurality of barrier line segments contained in the floating barrier and second direction vectors corresponding to the plurality of barrier line segments;

[0017] Obtaining a plurality of intersection points of the straight-line distance line segment and the barrier line segment according to the first direction vector and the second direction vector;

[0018] 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.

[0019] 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 an upper and lower line, the right direction is the other end of a line perpendicular to an upper and lower line, and the upper and lower line is a line between an upper direction and a lower direction, and obtaining the actual sound path 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 location of the noise source;

[0021] 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;

[0022] 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;

[0023] 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.

[0024] In one embodiment, the multiple directions include an upward direction, a left direction, a right direction, and a downward direction, and the noise attenuation items in multiple directions passing through the floating barrier are obtained according to the acoustic path differences of the noise diffraction paths in the multiple directions, including:

[0025] 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;

[0026] 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;

[0027] The noise attenuation items in the left direction, the right direction and the downward direction are obtained according to the sound path difference and the diffraction distance of the noise diffraction path in the left direction, the right direction and the downward direction.

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

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

[0030] According to the sound power 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.

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

[0032] An acoustic path difference acquisition module is used to acquire the acoustic path differences of noise diffraction paths in multiple directions passing through the floating barrier;

[0033] A noise attenuation item acquisition module, used to obtain noise attenuation items in multiple directions passing through the floating barrier according to the acoustic path differences of the noise diffraction paths in the multiple directions;

[0034] 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;

[0035] 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 noise comprehensive barrier attenuation item.

[0036] In a third aspect, the present application further provides a computer device, wherein the computer device comprises a memory and a processor, wherein 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, wherein a computer program is stored on the computer-readable storage medium, and the computer program is executed by a processor to execute the above method.

[0038] In a fifth aspect, the present application further provides a computer program product, wherein the computer program product comprises a computer program, and the computer program is executed by a processor to execute the above method.

[0039] The method, device, computer equipment, computer-readable storage medium and computer program product for determining the sound pressure level of the noise after multi-path diffraction attenuation of the floating barrier are used to obtain the path difference of the noise diffraction paths in multiple directions of the floating barrier; according to the path difference of the noise diffraction paths in multiple directions, the noise attenuation items in multiple directions of the floating barrier are obtained; according to the noise attenuation items in multiple directions, the comprehensive barrier attenuation items of the noise after multi-path diffraction of the floating barrier are obtained; according to the comprehensive barrier attenuation items of the noise, the total sound pressure level of the noise source after multi-path diffraction attenuation of the floating barrier is obtained. 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 items in multiple directions, the comprehensive barrier attenuation items of the noise after multi-path diffraction of the floating barrier are obtained; according to the comprehensive barrier attenuation items of the noise, the total sound pressure level of the noise source after multi-path diffraction attenuation of the floating barrier can be obtained, which is suitable for calculating the sound pressure level after noise attenuation of a multi-diffraction floating barrier with four propagation paths of up, down, left and right, and when the path differences in the four propagation directions are small, the calculated sound pressure level after 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 drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

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

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

[0043] Figure 3 A schematic diagram of multi-path diffraction of noise through a floating barrier in one embodiment;

[0044] Figure 4 Another schematic diagram of multi-path diffraction of noise through a floating barrier in one embodiment;

[0045] Figure 5 A horizontal noise distribution cloud map and a vertical noise distribution cloud map of a noise source in one embodiment;

[0046] Figure 6 A three-dimensional schematic diagram of multi-path diffraction of noise through a floating barrier in one embodiment;

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

[0048] Figure 8 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with 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 present application embodiment provides a method for determining the sound pressure level of noise after multi-path diffraction attenuation of a floating barrier. The present embodiment can be executed by a computer device, such as Figure 1 As shown, the computer device can obtain the acoustic path difference of the noise diffraction paths in multiple directions passing through the floating barrier, and then obtain the total sound pressure level of the noise source after the multi-path diffraction attenuation of the floating barrier. It can be understood that the computer device can be implemented by a server, or by a terminal, or by an interactive system between a terminal and a server. In this embodiment, the method includes Figure 2 The steps shown are:

[0051] Step S201, obtaining the acoustic path differences 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 and make the noise bypass the floating barrier from multiple directions, thereby effectively attenuating the noise. The multiple directions may include upward, left, right and downward directions.

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

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

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

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

[0057] For any one of the multiple directions, the noise attenuation items in the multiple directions passing through the floating barrier can be obtained according to the acoustic path difference of the noise diffraction path in the any one direction.

[0058] Step S203, obtaining a comprehensive barrier attenuation term of noise diffracted by multiple paths of the floating barrier according to the inverse of the noise attenuation terms in multiple directions.

[0059] The noise attenuation items in multiple directions can be superimposed to obtain the comprehensive barrier attenuation item of noise through multi-path diffraction of the floating barrier.

[0060] When the multiple directions include upward, left, right and downward directions, the noise attenuation items in the upward, left, right and downward directions can be energy superimposed. Specifically, the reciprocal sum of the noise attenuation items in the upward, left, right and downward directions can be used as the noise comprehensive barrier attenuation item after multi-path diffraction of the floating barrier. The calculation formula of the noise comprehensive barrier attenuation item is shown in formula (1).

[0061] (1)

[0062] Where λ is the wavelength of the sound wave, in m; is the comprehensive barrier attenuation term of the noise diffracted by the floating barrier, and 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 acoustic path difference of the noise diffraction path in the ith direction, in meters; Kmet is the meteorological impact factor, The calculation formula is shown in formula (2).

[0063] (2)

[0064] in, is the diffraction distance between the first diffraction boundary and the last diffraction boundary in the noise diffraction path in the i-th direction, in meters.

[0065] Step S204, obtaining the total sound pressure level of the noise source after multi-path diffraction attenuation of the floating barrier according to the noise comprehensive barrier attenuation item.

[0066] If the noise source contains multiple octave bands, the comprehensive noise barrier attenuation item of each frequency band needs to be calculated separately, and finally the sound pressure levels of multiple octave bands need to be superimposed. That is, based on the sound power of multiple octave bands and the comprehensive noise barrier attenuation item, the total sound pressure level of the noise source after multi-path diffraction attenuation of the floating barrier is obtained.

[0067] In the above method for determining the sound pressure level of noise after multi-path diffraction attenuation of the floating barrier, the influence of diffraction paths in multiple directions of the floating barrier is taken into account, and the comprehensive barrier attenuation item of the noise after multi-path diffraction of the floating barrier is obtained according to the noise attenuation items in multiple directions; according to the comprehensive barrier attenuation item of noise, the total sound pressure level of the noise source after multi-path diffraction attenuation of the floating barrier can be obtained, which is suitable for calculating the sound pressure level after noise attenuation of a multi-diffraction floating barrier with four propagation paths of up, down, left and right, and when the sound path differences in the four propagation directions are small, the calculated sound pressure level after noise attenuation is more accurate.

[0068] In one of the embodiments, the acoustic path difference of the noise diffraction paths in multiple directions passing through the floating barrier is obtained, and the specific steps are as follows: for any direction of the multiple directions, the actual acoustic path of the noise source bypassing the floating barrier from any direction is obtained; the straight-line distance from the location of the noise source to the receiving point is obtained; based on the actual acoustic path and straight-line distance of the noise source bypassing the floating barrier from any direction, the acoustic path difference of the noise diffraction path in any direction is obtained.

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

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

[0071] (3)

[0072] in, is the actual sound path of the noise bypassing the floating barrier from the ith direction, in meters; is the straight-line distance from the noise source to the receiving point, in meters. If the line from the noise source to the receiving point is not blocked by a floating barrier, the sound path difference δ takes a negative value.

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

[0074] In one embodiment, when the multiple directions include an upward direction and a downward direction, the upward direction is a direction away from the ground, and the downward direction is a direction close to the ground, and the actual sound path of the noise source bypassing the floating barrier from the upward direction and the downward direction is obtained, and the specific steps are as follows: obtain 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; obtain several barrier segments contained in the floating barrier and second direction vectors corresponding to the several barrier segments; obtain several intersection points of the straight-line distance segment and the barrier segment based on the first direction vector and the second direction vector; obtain the actual sound path of the noise source bypassing the floating barrier from the upward direction and the downward direction based on the several intersection points.

[0075] The schematic diagram of noise diffraction through floating barriers is as follows: Figure 3 As shown, S is the location of the noise source and R is the receiving point; The direction away from the ground is called the upward direction. The direction close to the ground is called the downward direction; the line between the upward and downward directions can be called the upward and downward line. The end of the line perpendicular to the upper and lower lines is called the left direction. The other end of the line perpendicular to the upper and lower lines is called the right direction.

[0076] Another schematic diagram of noise diffraction through floating barriers is shown below: Figure 4 As shown, the straight-line distance segment P from the receiving point to the noise source can be obtained. R P S , straight line distance line segment P R P S It can be called a scan line, and the straight line distance line segment P R P S It can be expressed as , where P R is the coordinates of the receiving point (x0, y0, z0), The receiving point P R To the location of the noise source P S The first direction vector of , s is a real number.

[0077] You can get several barrier line segments P contained in the floating barrier i P i+1 , barrier line segment P i P i+1 It can be expressed as ,in is the second direction vector corresponding to barrier segment i, and t is a real number.

[0078] According to the first direction vector and the second direction vector The cross product between Is it non-zero? Determine whether the straight distance line segment intersects with each barrier line segment. When the cross product When it is equal to zero, it represents the first direction vector and the second direction vector Parallel or coincident, in this case, the straight distance line segment does not intersect with the barrier line segment i, when the cross product When non-zero, it represents the first direction vector and the second direction vector Non-parallel and non-coincident, at this time the straight distance segment intersects with the barrier segment i.

[0079] The cross product operation formula of the vector is shown in formula (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 formula (5): .

[0082] (5)

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

[0084] According to several intersection points , and obtain the actual sound path of the noise source bypassing the floating barrier from the upper and lower directions.

[0085] In this embodiment, based on the first direction vector from the receiving point to the location of the noise source and the second direction vector corresponding to the several barrier line segments contained in the floating barrier, several intersection points of the straight-line distance segment and the barrier line segment are obtained; based on the several intersection points, the actual sound path of the noise source bypassing the floating barrier from the upper direction and the lower direction can be obtained more accurately.

[0086] In one of the embodiments, 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 and lower lines, and the right direction is the other end of a line perpendicular to the upper and lower lines, and the upper and lower lines are the lines between the upper and lower directions, and the actual sound path of the noise source bypassing the floating barrier from the left and right directions is obtained. The specific steps are as follows: 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; 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.

[0087] The schematic diagram of noise diffraction through floating barriers is as follows: Figure 3 As shown, S is the location of the noise source and R is the receiving point; The direction away from the ground is called the upward direction. The direction close to the ground is called the downward direction; the line between the upward and downward directions can be called the upward and downward line. The end of the line perpendicular to the upper and lower lines is called the left direction. The other end of the line perpendicular to the upper and lower lines is called the right direction.

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

[0089] According to the location S of the noise source and the receiving point R and the left point group U 左m The positions of the points in the graph and their relative positions are filtered from the left point group to obtain the endpoints included in the diffraction path in the left direction.

[0090] According to the location S of the noise source and the receiving point R and the right point group U 右k The positions of each point in the graph and their relative positions are filtered from the right point group to obtain the endpoints included in the diffraction path in the right direction.

[0091] 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.

[0092] In this embodiment, the endpoints contained in the floating barrier are divided into a left point group and a right point group according to the straight-line distance segment from the receiving point to the location of the noise source; the endpoints contained in the diffraction paths in the left and right directions are obtained by screening from the left point group and the right point group to obtain a more accurate actual sound path of the noise source bypassing the floating barrier from the left and right directions.

[0093] In one embodiment, the multiple directions include upward, left, right and downward directions, and the noise attenuation items in multiple directions passing through the floating barrier are obtained according to the sound path difference of the noise diffraction paths in the multiple directions. The specific steps are as follows: obtaining the diffraction distances between the first diffraction boundary and the last diffraction boundary of the noise diffraction paths in the upward, left, right and downward directions; obtaining the noise attenuation item in the upward direction according to the sound path difference, diffraction distance and meteorological influence factor of the noise diffraction path in the upward direction; obtaining the noise attenuation items in the left, right and downward directions according to the sound path difference and diffraction distance of the noise diffraction paths in the left, right and downward directions.

[0094] The diffraction distances e1, e2, e3 and e4 of the noise diffraction paths in the upward, left, right and downward directions between the first diffraction boundary and the last diffraction boundary of each may be obtained.

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

[0096] (6)

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

[0098] According to the acoustic path difference and diffraction distance of the noise diffraction path in the left, right and downward directions, the noise attenuation terms in the left, right and downward directions are obtained, as shown in equations (7), (8) and (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 acoustic path difference of the noise diffraction path in the left direction, is the acoustic path difference of the noise diffraction path in the right direction, is the acoustic path difference of the noise diffraction path in the downward direction, , and The calculation formula is shown in formula (2).

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

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

[0105] The previous calculation formula calculates the noise attenuation items in multiple directions of the floating barrier in a certain octave band, and the obtained noise comprehensive barrier attenuation item is a certain octave band. If the noise source contains multiple octave bands, it is necessary to calculate the noise comprehensive barrier attenuation items of each band separately. Finally, it is necessary to superimpose the energy of the sound pressure levels of multiple octave bands, that is, according to the sound power and noise comprehensive barrier attenuation items of multiple octave bands, the total sound pressure level of the noise source after multi-path diffraction attenuation of the floating barrier is obtained. The calculation formula is shown in formula (10).

[0106] (10)

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

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

[0109] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0110] Based on the same inventive concept, the embodiment of the present application also provides a device for determining the sound pressure level of noise after multi-path diffraction attenuation of a floating barrier for implementing the above-mentioned method for determining the sound pressure level of noise after multi-path diffraction attenuation of a floating barrier. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above-mentioned method, so the specific limitations in the embodiments of one or more devices for determining the sound pressure level of noise after multi-path diffraction attenuation of a floating barrier provided below can be referred to the limitations of the method for determining the sound pressure level of noise after multi-path diffraction attenuation of a floating barrier above, and will not be repeated here.

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

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

[0113] A noise attenuation item acquisition module 702 is used to obtain noise attenuation items in multiple directions passing through the floating barrier according to the acoustic path differences of the noise diffraction paths in the multiple directions;

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

[0115] The total sound pressure level acquisition module 704 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 noise comprehensive barrier attenuation item.

[0116] In one embodiment, the sound path difference acquisition module 701 is also used to: obtain, for any one of multiple directions, an actual sound path of the noise source bypassing the floating barrier from the any direction; obtain 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 based on the actual sound path of the noise source bypassing the floating barrier from the any direction 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 a direction away from the ground, and the downward direction is a direction close to the ground, and the sound path difference acquisition module 701 is further used to: obtain 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; obtain a plurality of barrier segments contained in the floating barrier and a second direction vector corresponding to the plurality of barrier segments; obtain a plurality of intersection points of the straight-line distance segment and the barrier segment based on the first direction vector and the second direction vector; and obtain an actual sound path of the noise source bypassing the floating barrier from the upward direction and the downward direction based on the plurality of 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 an upper and lower line, and the right direction is the other end of a line perpendicular to an upper and lower line, and the upper and lower line is a line between an upper direction and a lower direction. The sound path difference acquisition module 701 is further used to: obtain a straight-line distance segment from a receiving point to a location of a noise source; divide the endpoints contained in the floating barrier into a left point group and a right point group using the straight-line distance segment as a dividing line; filter from the left point group and the right point group to obtain endpoints contained 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 contained in the diffraction paths in the left and right directions.

[0119] In one embodiment, the multiple directions include upward, left, right and downward directions, and the comprehensive barrier attenuation item acquisition module 703 is further used to: obtain the diffraction distance of the noise diffraction path in the upward, left, right and downward directions between the first diffraction boundary and the last diffraction boundary of each; obtain the noise attenuation item in the upward direction 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 items in the left, right and downward directions according to the sound path difference and diffraction distance of the noise diffraction path in the left, right and downward directions.

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

[0121] Each module in the above-mentioned device for determining the sound pressure level of noise after multi-path diffraction attenuation of floating barriers can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, 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 may be a server, and its internal structure diagram may be as shown in FIG. Figure 8 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to 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 an embodiment of a method for determining the sound pressure level of noise after multi-path diffraction attenuation of a floating barrier. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for determining the sound pressure level of noise after multi-path diffraction attenuation of a floating barrier is implemented.

[0123] Those skilled in the art will understand that Figure 8 The structure shown in the figure is only a block diagram of a part of the structure 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 certain components, or have a different arrangement of components.

[0124] In one embodiment, a computer device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above method embodiments when executing the computer program.

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

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

[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 used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0128] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and 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-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present 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), magnetic 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. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0129] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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, they should be considered to be within the scope of this application.

[0130] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for determining the sound pressure level of noise after multipath diffraction attenuation of a floating barrier, characterized in that: The method comprises: Obtain the acoustic path differences of noise diffraction paths in multiple directions passing through the floating barrier; Obtaining noise attenuation items in multiple directions passing through the floating barrier according to the acoustic path differences of the noise diffraction paths in the multiple directions; According to the inverse of the noise attenuation terms in the multiple directions, a comprehensive barrier attenuation term of noise through multi-path diffraction of the floating barrier is obtained; According to the noise comprehensive barrier attenuation item, 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 step of obtaining the acoustic path differences of the noise diffraction paths in multiple directions passing through the floating barrier comprises: For any one of the multiple directions, obtaining an actual sound path of the noise source bypassing the floating barrier from the any one direction; Get the straight-line distance from the noise source to the receiving point; According to the actual sound path of the noise source bypassing the floating barrier from any direction and the straight-line distance, the sound path difference of the noise diffraction path in any direction is obtained.

3. The method according to claim 2, characterized in that When the multiple directions include an upward direction and a downward direction, the upward direction is a direction away from the ground, and the downward direction is a direction close to the ground, obtaining the actual sound path of the noise source bypassing the floating barrier from the upward direction and the downward direction includes: 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; Obtaining a plurality of intersection points of the straight-line distance line segment and the barrier line segment 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.

4. The method according to claim 2, characterized in that: When the multiple directions include a left direction and a right direction, the left direction is one end of a line perpendicular to an upper and lower line, the right direction is the other end of a line perpendicular to an upper and lower line, and the upper and lower line is a line between an upper direction and a lower direction, and obtaining an actual sound path of a noise source bypassing a floating barrier from a left direction and a right direction includes: 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. The method according to claim 1, characterized in that The multiple directions include an upward direction, a left direction, a right direction, and a downward direction, and the noise attenuation items in multiple directions passing through the floating barrier are obtained according to the acoustic path differences of the noise diffraction paths in the multiple directions, including: 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; The noise attenuation items in the left direction, the right direction and the downward direction are obtained according to the sound path difference and the diffraction distance of the noise diffraction path in the left direction, the right direction and the downward direction.

6. The method according to claim 1, characterized in that The total sound pressure level of the noise source after multi-path diffraction attenuation of the floating barrier is obtained according to the noise comprehensive barrier attenuation term, including: Get the sound power of the noise source; According to the sound power 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.

7. 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: An acoustic path difference acquisition module is used to acquire the acoustic path differences of noise diffraction paths in multiple directions passing through the floating barrier; A noise attenuation item acquisition module, used to obtain noise attenuation items in multiple directions passing through the floating barrier according to the acoustic path differences of the noise diffraction paths in the multiple 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 noise comprehensive barrier attenuation item.

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 6 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 6 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 6 are implemented.

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