Evaluation method for evaluating the sound reinforcement performance of a sound reinforcement system in a target building space

Abstract

The present invention proposes an evaluation method for evaluating the sound reinforcement performance of a sound reinforcement system in a target building space. First, a corresponding spatial model of the target building space to be evaluated is established according to its internal form; then, the spatial model of the target building space established in step 1 is partitioned according to the sound reinforcement system layout plan of the target building space; then, the spatial sound reinforcement dissipation coefficient of each partitioned space is calculated; finally, the spatial sound reinforcement dissipation coefficient β of the sound reinforcement system layout plan of the entire target building space is calculated; the smaller the obtained β, the smaller the impact of the sound reinforcement on other spaces, and the better the sound reinforcement performance of the sound reinforcement system layout plan of the target building space.

Description

Technical Field

[0001] The present invention belongs to the technical field of architectural acoustics, and in particular relates to an evaluation method for evaluating the sound reinforcement performance of a sound reinforcement system in a target building space. Background Art

[0002] With the development of architectural technology, the construction of extra-large and long spaces is becoming increasingly common, such as airport terminals, train lounges, large convention and exhibition centers, and subway platforms. One or more dimensions of these spaces often exceed the scale of conventional rooms, reaching tens or even hundreds of meters, forming a unique architectural type.

[0003] This type of space often serves a large number of people, and functions such as public broadcasting and voice-guided emergency evacuation can only be achieved by relying on the sound reinforcement system. The clarity of this type of sound reinforcement system depends not only on the selection of the sound reinforcement system itself, the placement of the speakers, etc., but also on the joint effect of the sound field of the building space. The design of the sound absorption interface of the space will greatly affect the clarity of the sound reinforcement system, and there is also mutual interference between the speakers. Therefore, from the perspective of sound effects, the evaluation target should be determined as a "sound reinforcement system-building sound field" coupled system for comprehensive performance evaluation. How to evaluate the mutual interference between speakers in this type of building space has always been a difficult problem. It is difficult for general evaluation methods to comprehensively consider the two aspects of the sound reinforcement system and architectural acoustic measures. This patent aims to propose a comprehensive performance evaluation method for the "sound reinforcement-building acoustic" coupling system suitable for the target building space.

[0004] The core concept of this patent lies in comprehensively measuring the combined impact of inter-speaker interference and the acoustic properties of building interfaces on sound quality. This patent proposes a spatial zoning approach, evaluating each zone individually. The spillover of spatial sound energy can be used to measure both the directivity of the speakers and the effectiveness of the architectural acoustics solution in eliminating this mutual interference. This patent only considers the direct sound from the speakers and the primary reflected sound within the zones, evaluating the spillover sound energy and ultimately combining it to provide an overall evaluation. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a method for evaluating the sound reinforcement performance of a sound reinforcement system in a target building space.

[0006] The present invention is achieved through the following technical solutions:

[0007] A method for evaluating the sound reinforcement performance of a sound reinforcement system in a target building space comprises the following steps:

[0008] Step 1: First, establish the corresponding space model according to the internal form of the target building space to be evaluated;

[0009] The spatial model includes interfaces such as the ground, walls, and roof established according to the target building space, and the sound absorption coefficient of each interface is determined according to the actual architectural design conditions within the target building space;

[0010] Step 2: partition the target building space model established in step 1 according to the sound reinforcement system layout plan of the target building space;

[0011] Step 2.1: First, based on the sound reinforcement system layout to be evaluated, the spatial model created in Step 1 is divided into planar zones according to the service areas corresponding to each loudspeaker. That is, a rectangular planar zone is defined on the ground surface of the spatial model. The boundary lines of the planar zones include the actual boundary lines between the ground and the walls, as well as the virtual boundary lines of the zones.

[0012] Step 2.2: Extend the virtual boundary lines of each planar partition vertically upward to the roof surface to form a virtual wall surface, so that the ground, wall, virtual wall and roof surface of each planar partition form an independent hexahedral partition space, each partition space contains its own sound amplifier; set the sound absorption coefficient of the virtual wall surface to 0;

[0013] Step 3, calculating the spatial sound amplification coefficient of a single partition space;

[0014] Step 3.1: For a single partitioned space, take the geometric center of the loudspeaker contained in it as the center of the sphere. First, calculate the spatial angle θ occupied by the projection of each interface of the single partitioned space at the center of the sphere. i , where i = 1, 2...6, representing the 6 interfaces contained in a single partition space;

[0015] Step 3.2: Then, according to the space angle θ i , calculate the sound power W of the loudspeaker occupied by each interface in a single partition space i ;

[0016]

[0017]

[0018] Where W 总 is the total sound power of the loudspeaker in a single partition space, which is a known value; θ 总 It is the sum of the spatial angles of the six interfaces of a single partition space;

[0019] Step 3.3: Then, calculate the spatial sound reinforcement dissipation sound power W of each interface in a single partition space i A ;

[0020] W i A=W i *(1-a i )

[0021] Where a i is the sound absorption coefficient of each interface;

[0022] Step 3.4: Then, calculate the total sound power dissipated by the spatial sound reinforcement in a single partitioned space.

[0023]

[0024] Where n is the number of interfaces in a single partition space, and n is 6;

[0025] Step 3.5: Finally, calculate the spatial sound dispersion coefficient of a single partition space

[0026] Step 4, calculating the spatial sound amplification dissipation coefficient β of the sound reinforcement system layout plan for the entire target building space;

[0027]

[0028] Where, is the ground area of ​​each partition space, and m is the number of partition spaces contained in the spatial model of the target building space.

[0029] In the above technical solution, the smaller the obtained β is, the smaller the impact of the loudspeaker on other spaces is, and the better the sound reinforcement performance of the sound reinforcement system layout solution in the target building space is.

[0030] In the above technical solution, when the target building space faces multiple candidate sound reinforcement system layout schemes, the above evaluation method of the present invention is used to calculate the spatial sound reinforcement dissipation coefficient β of each candidate sound reinforcement system layout scheme, and the sound reinforcement system layout scheme corresponding to the smallest β value is selected as the optimal scheme.

[0031] The advantages and beneficial effects of the present invention are:

[0032] The evaluation method of the present invention can be used to assess the sound reinforcement performance of sound reinforcement system layout options for a target building space, thereby guiding the determination of the optimal sound reinforcement system layout for the target building space. Specifically, when a target building space is presented with multiple potential sound reinforcement system layout options, the evaluation method of the present invention calculates the spatial sound amplification dissipation coefficient β for each of the potential sound reinforcement system layout options, and the sound reinforcement system layout corresponding to the smallest β value is selected as the optimal solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1It is a schematic diagram of the space model and plane partitions established based on the layout of the sound reinforcement system to be evaluated.

[0034] Figure 2 It is a schematic diagram of the partitioned spaces contained in the spatial model.

[0035] Figure 3 It is a schematic diagram of the spatial angle occupied by the projections of various interfaces of a single partition space at the center of the speaker sphere.

[0036] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention are further described below with reference to specific embodiments.

[0038] A method for evaluating the sound reinforcement performance of a sound reinforcement system in a target building space comprises the following steps:

[0039] Step 1: First, establish the corresponding space model according to the internal form of the target building space to be evaluated.

[0040] The spatial model includes interfaces such as the ground, walls, and roof established according to the target building space, and the sound absorption coefficient of each interface is determined according to the actual architectural design conditions inside the target building space (the noise reduction coefficient can be taken as a single-value evaluation quantity of the sound absorption coefficient).

[0041] Step 2: partition the spatial model of the target building space established in step 1 according to the sound reinforcement system layout plan of the target building space.

[0042] Specifically, the sound reinforcement system layout will include multiple loudspeakers (speakers) to cover and serve the entire target building space. Figure 1 First, based on the layout of the sound reinforcement system to be evaluated, the spatial model established in step 1 is divided into planar partitions according to the service area corresponding to each loudspeaker, that is, a rectangular planar area is determined on the ground of the spatial model; the boundary lines of the divided planar partitions will include the actual boundary lines between the ground and the wall, as well as the virtual boundary lines of the divisions.

[0043] Then, see the attached Figure 2 , according to the virtual boundary line of each plane partition, it extends vertically upward to the roof surface to form a virtual wall, so that the ground, wall, virtual wall and roof surface of each plane partition are enclosed into an independent hexahedral partition space, and each partition space contains its own loudspeaker; the sound absorption coefficient of the virtual wall is set to 0.

[0044] Step 3: Calculate the spatial sound dispersion coefficient of a single partitioned space.

[0045] For details, see the attached Figure 3 For a single partition space, take the geometric center of the loudspeaker contained in it as the center of the sphere. First, calculate the space angle θ occupied by the projection of each interface of the single partition space at the center of the sphere. i , where i = 1, 2...6, representing the 6 interfaces contained in a single partition space; then, according to the space angle θ i , calculate the sound power W of the loudspeaker occupied by each interface (including the ground, wall, virtual wall and roof) of a single partition space i ;

[0046]

[0047]

[0048] Where W 总 is the total sound power of the loudspeaker in a single partition space, which is a known value; θ 总 It is the sum of the spatial angles of the six interfaces of a single partition space.

[0049] Then, calculate the spatial sound reinforcement dissipation sound power W of each interface in a single partition space i A ;

[0050] W i A =W i *(1-a i )

[0051] Where a i is the sound absorption coefficient of each interface.

[0052] Then, calculate the total sound power dissipated by the spatial sound reinforcement in a single partition space

[0053]

[0054] Where n is the number of interfaces in a single partition space, and n is 6.

[0055] Finally, calculate the spatial sound diffusion coefficient of a single partition space

[0056] Step 4: Calculate the spatial sound amplification dissipation coefficient β of the sound reinforcement system layout plan for the entire target building space.

[0057] The calculation formula for the spatial sound amplification dissipation coefficient of the sound reinforcement system layout plan of the entire target building space is as follows:

[0058]

[0059] Where, is the ground area of ​​each partition space, and m is the number of partition spaces contained in the spatial model of the target building space.

[0060] The smaller the obtained β is, the smaller the impact of the sound amplifier on other spaces is, which means that the sound reinforcement performance of the sound reinforcement system layout plan of the target building space is better.

[0061] The evaluation method of the present invention can be used to assess the sound reinforcement performance of sound reinforcement system layout options for a target building space, thereby guiding the determination of the optimal sound reinforcement system layout for the target building space. Specifically, when a target building space is presented with multiple potential sound reinforcement system layout options, the evaluation method of the present invention calculates the spatial sound amplification dissipation coefficient β for each of the potential sound reinforcement system layout options, and the sound reinforcement system layout corresponding to the smallest β value is selected as the optimal solution.

[0062] The above is an exemplary description of the present invention. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by other skilled in the art without expending creative labor falls within the scope of protection of the present invention.

Claims

1. A method for evaluating the sound reinforcement performance of a sound reinforcement system in a target building space, characterized in that: The following steps are involved: Step 1: First, establish the corresponding space model according to the internal form of the target building space to be evaluated; The spatial model includes three interfaces: ground, wall, and roof, established according to the target building space, and the sound absorption coefficient of each interface is determined according to the actual architectural design conditions inside the target building space; Step 2: partition the target building space model established in step 1 according to the sound reinforcement system layout plan of the target building space; Step 2.1: Based on the sound reinforcement system layout to be evaluated, the spatial model created in Step 1 is divided into planar zones according to the service areas corresponding to each loudspeaker. A rectangular planar zone is defined on the ground surface of the spatial model. The boundary lines of the planar zones include the actual boundary lines between the ground and the walls, as well as the virtual boundary lines. Step 2.2: Extend the virtual boundary lines of each planar partition vertically upward to the roof surface to form a virtual wall surface, so that the ground, wall, virtual wall and roof surface of each planar partition form an independent hexahedral partition space, and each partition space contains its own sound amplifier; set the sound absorption coefficient of the virtual wall surface to 0; Step 3, calculating the spatial sound amplification coefficient of a single partition space; Step 3.1: For a single partitioned space, take the geometric center of the loudspeaker contained in it as the center of the sphere. First, calculate the spatial angle θ occupied by the projection of each interface of the single partitioned space at the center of the sphere. i , where i = 1, 2...6, representing the 6 interfaces contained in a single partition space; Step 3.2: According to the space angle θ i , calculate the sound power W of the loudspeaker occupied by each interface in a single partition space i ; Where W 总 is the total sound power of the loudspeaker in a single partition space, which is a known value; θ 总 It is the sum of the spatial angles of the six interfaces of a single partition space; Step 3.3: Calculate the spatial sound reinforcement dissipation sound power W of each interface in a single partitioned space i A ; W i A =W i *(1-a i ) Where a i is the sound absorption coefficient of each interface; Step 3.4: Calculate the total sound power dissipated by the spatial sound reinforcement in a single partitioned space Where n is the number of interfaces in a single partition space, and n is 6; Step 3.5: Calculate the spatial sound dispersion coefficient of a single partition space Step 4, calculating the spatial sound amplification dissipation coefficient β of the sound reinforcement system layout plan for the entire target building space; Where, is the ground area of ​​each partition space, and m is the number of partition spaces contained in the spatial model of the target building space.

2. The method for evaluating the sound reinforcement performance of a sound reinforcement system in a target building space according to claim 1, wherein: The smaller the obtained β is, the smaller the impact of the loudspeaker on other spaces is, and the better the sound reinforcement performance of the sound reinforcement system layout plan for the target building space is.

3. The method for evaluating the sound reinforcement performance of a sound reinforcement system in a target building space according to claim 1, wherein: When the target building space faces multiple candidate sound reinforcement system layout schemes, the spatial sound reinforcement dissipation coefficient β of each candidate sound reinforcement system layout scheme is calculated respectively, and the sound reinforcement system layout scheme corresponding to the smallest β value is selected as the optimal scheme.

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