JP2022104148A - Indoor acoustic evaluation system and acoustic evaluation method - Google Patents

Abstract

To provide an indoor acoustic evaluation system capable of studying space acoustics even by a designer who does not have technical knowledge about acoustics.SOLUTION: The indoor acoustic evaluation system includes: a storage unit that stores different combinations of acoustic evaluation items, which are items for evaluating acoustics, and evaluation criteria in the acoustic evaluation items, depending on the indoor use of the space to be evaluated for acoustics; an acquisition unit that acquires acoustic data that is a calculation result of acoustic simulation of a space to be evaluated; an input unit that accepts input for an indoor use that specifies the indoor use; an evaluation rule selection unit that reads the acoustic evaluation item according to the input indoor use and the evaluation criteria from the storage unit; and a determination unit that determines the calculation result corresponding to the acoustic evaluation item read by the evaluation rule selection unit among the calculation results included in the acoustic data, using the evaluation criteria specified in the acoustic evaluation item, and obtains the determination result.SELECTED DRAWING: Figure 1

Description

The present invention relates to a room acoustic evaluation system and an acoustic evaluation method.

Appropriate room acoustic design is important to ensure appropriate reverberation, sufficient volume, and clarity, and to prevent acoustic disturbances such as flutter echo, in spaces such as halls and auditoriums where music and voice are listened to. Is.
When designing a building that requires acoustic consideration such as a hall or auditorium, use indoor acoustic evaluation indexes such as reverberation time, intelligibility, and sound pressure level distribution that change depending on the shape of the room and the type of finishing material. Predictions and evaluations may be made by calculations based on statistical theory or simulations based on geometry or wave theory, and specifications may be determined based on the results.
Acoustic analysis software is sold as a calculation / simulation technique for indoor acoustic evaluation indexes, and general computer companies and architectural acoustic consultants have developed and used indoor acoustic simulation systems (for example, Patent Document 1) by themselves.

Japanese Unexamined Patent Publication No. 3-194599

However, in order to carry out room acoustic simulation using commercially available acoustic analysis software or software such as Patent Document 1, and to calculate and evaluate the indoor acoustic evaluation index, knowledge / techniques related to simulation and expertise in acoustics are required. Knowledge is required.
However, the designer who designs the building does not necessarily have the knowledge / technique regarding simulation and the specialized knowledge regarding acoustics. Therefore, it is difficult for the designer to conduct an acoustic study by himself, so it is generally necessary to obtain the cooperation of an architectural acoustic expert or a specialist. In this case, it takes time to examine the sound and the cost is high.
On the other hand, the volume, room shape, seating arrangement, etc. of the building, which are determined at the initial stage of design, have a great influence on the room acoustics, so when designing a building that requires acoustic consideration such as a hall or auditorium, It is necessary to start the acoustic study from the initial stage of design. However, at present, due to the above-mentioned circumstances, it is difficult for a designer who does not have specialized knowledge about acoustics from the initial stage to carry out the examination.

The present invention has been made in view of such circumstances, and the purpose of the present invention is to evaluate room acoustics so that even a designer who does not have specialized knowledge about acoustics can study the acoustics of space. The purpose is to provide a system and an acoustic evaluation method.

In order to solve the above-mentioned problems, one aspect of the present invention relates to an acoustic evaluation item, which is an item for evaluating acoustics, and an evaluation standard in the acoustic evaluation item, depending on the room use of the space to be evaluated for acoustics. A storage unit (for example, a storage unit 120) that stores different combinations, an acquisition unit (for example, a control unit 150) that acquires acoustic data that is a calculation result obtained by performing an acoustic simulation for the space to be evaluated, and the room use. An input unit (for example, a room use input unit 130) that accepts an input for a room use, and an evaluation rule selection unit that reads out the acoustic evaluation items and the evaluation criteria according to the input room use from the storage unit. (For example, the evaluation rule selection unit 140) and the calculation results included in the acoustic data, which correspond to the acoustic evaluation items read by the evaluation rule selection unit, are evaluated as defined in the acoustic evaluation items. It has a determination unit (for example, a determination unit 220) that makes a determination using a reference and obtains the determination result.

Further, one aspect of the present invention is an acoustic evaluation method executed by an indoor acoustic evaluation system, which is acoustic data which is a calculation result obtained by acoustic simulation of the space to be evaluated by the acquisition unit of the indoor acoustic evaluation system. Is acquired, the input unit of the room acoustic evaluation system accepts the input of the room use that specifies the room use of the space for which the sound is evaluated, and the evaluation rule selection unit of the room acoustic evaluation system evaluates the sound. Regarding the acoustic evaluation item which is an item and the evaluation standard in the acoustic evaluation item, the acoustic evaluation item and the evaluation standard according to the input room use are referred to with reference to a storage unit which stores different combinations according to the room use. Is read from the storage unit, and the determination unit of the room acoustic evaluation system determines the calculation result corresponding to the acoustic evaluation item read by the evaluation rule selection unit among the calculation results included in the acoustic data. This is an acoustic evaluation method in which a judgment is made using the evaluation criteria defined in the acoustic evaluation items and the judgment result is obtained.

As described above, according to the present invention, even a designer who does not have specialized knowledge about acoustics can study the acoustics of space.

It is a schematic block diagram which shows the structure of the room acoustic evaluation system 1 by one Embodiment of this invention. It is a figure which shows an example of the reference data stored in the storage unit 120. It is a flowchart explaining the operation of the room acoustic evaluation system 1. It is a figure which shows an example of the display screen.

Hereinafter, the room acoustic evaluation system according to the embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic block diagram showing a configuration of a room acoustic evaluation system 1 according to an embodiment of the present invention.
The room acoustic evaluation system 1 includes an interface device 10, an acoustic simulation device 20, and a determination device 30.
The interface device 10 provides the acoustic simulation device 20 with various data necessary for performing the acoustic simulation. The interface device 10 gives a determination standard (for example, reference data) to the determination device 30. The interface device 10 is given an evaluation result for the result of the acoustic simulation from the acoustic simulation device 20 to the determination device 30, and acquires the evaluation result which is the result of the evaluation performed by the determination device 30 from the determination device 30.
The acoustic simulation device 20 performs an acoustic simulation based on various data obtained from the interface device 10 and necessary for performing the acoustic simulation, and gives the result of the acoustic simulation to the determination device 30.
The determination device 30 receives the result of the acoustic simulation from the acoustic simulation device 20, evaluates the acoustic using the result of the acoustic simulation and the determination standard, and outputs the evaluation result to the interface device 10.

The indoor acoustic evaluation system 1 may be realized by configuring the interface device 10, the acoustic simulation device 20, and the determination device 30 with one computer, or the interface device 10, the acoustic simulation device 20, and the determination device 30 may be realized. It may be configured with different computers for and.

The interface device 10 includes a data addition unit 110, a storage unit 120, a room use input unit 130, an evaluation rule selection unit 140, a control unit 150, and an output unit 160. Further, an input device such as a keyboard and a mouse, a display device, and the like are connected to the outside of the interface device 10.
The data addition unit 110 receives the input of the chamber shape model representing the chamber shape and the calculation condition, and outputs the input to the acoustic simulation device 20.
The data addition unit 110 receives an input of a chamber shape model representing the chamber shape, calculation conditions, and the like by operating an input device provided outside the interface device 10. Further, the function of the data addition unit 110 may be provided in the three-dimensional CAD (computer-aided design) software (hereinafter, also referred to as 3D CAD software), or may function as a plug-in tool for the 3D CAD software. It may be.
The chamber shape model is data of a three-dimensional model representing the shape of the room to be evaluated for acoustics. This chamber shape model can be created by 3D CAD software. Designers generally use such 3D CAD software when designing the three-dimensional shape of the building to be designed, so when creating a room shape model, use the software that they usually use. Therefore, it can be created by utilizing the knowledge possessed by the designer. That is, since it is not necessary to use a new tool for creating the chamber shape model, the burden on the designer for creating the chamber shape model is small.
As the 3D CAD software, for example, existing software such as Rhinoceros (manufactured by Applicraft Co., Ltd.) can be used. Further, as the plug-in tool, for example, Grasshopper (manufactured by Applicraft Co., Ltd.) can be used.
The calculation conditions can include room applications, types of finishing materials, and various other conditions for performing calculations in the room for which acoustics are to be evaluated. When inputting calculation conditions, if there is a function to input in 3D CAD software, you may have them input using 3D CAD software, or among the items of calculation conditions, items that do not have a function to input in 3D CAD software. For, the calculation condition may be input by using the plug-in tool in the 3D CAD software. In this case, when inputting the chamber shape model and calculation conditions, it can be realized by existing 3D CAD software and plug-in tools that are generally used, so it is very easy for the designer to input the operation. can.

The storage unit 120 stores reference data. The reference data is data including different combinations of acoustic evaluation items, which are items for evaluating acoustics, and evaluation criteria in the acoustic evaluation items, depending on the room use of the space for which acoustics are evaluated.
FIG. 2 is a diagram showing an example of reference data stored in the storage unit 120.
The reference data is data including room use, acoustic evaluation items, and evaluation criteria in the evaluation items.
The room use is a space to be designed and to be evaluated for acoustics. The space to be evaluated is mainly a room separated by a wall, a floor, a ceiling, a door, a window, or the like. The use of the space is, for example, a concert hall, a multipurpose hall, a school auditorium, a multipurpose hall, a live house, a conference room, a classroom, or the like. Here, if the purpose can be grasped from the name of the space such as "concert hall", the name of the space can be used as the room use. In addition to the name of the space, the purpose or purpose may be used as a room use, such as "music performance use", "lecture / ceremony use", and the like. For example, for concert halls, multipurpose halls, school auditoriums, etc. whose main purpose is to perform using acoustic musical instruments, "music performance use", for multipurpose halls using electroacoustic devices, live houses, etc., "lecture / ceremony use" ] Etc. can also be used.

The acoustic evaluation item is an item for evaluating acoustics, and includes at least one of one of average sound absorption coefficient, music intelligibility, speech intelligibility, echo interference, and sound pressure distribution.

The average sound absorption coefficient represents the total sound absorption coefficient of the sound generated in the space in the room. For example, a value obtained comprehensively for the degree of sound absorption of each material used for the interior (finishing material) of the ceiling or wall of the room is used.
Music intelligibility represents the degree of audibility of music that occurs when a performance is performed using a musical instrument or the like.
Speech intelligibility represents the degree of audibility of speech.
The echo interference degree indicates the degree to which the sound from the sound source is disturbed (affected) by the echo of the sound.
The sound pressure distribution represents the distribution of sound pressure in a room according to the position where the sound is heard.

The evaluation standard represents a standard for evaluation based on the acoustic evaluation item. The evaluation criteria include a value representing the reference range and an evaluation result according to the reference range.

In FIG. 2, for example, for a room use “concert hall / multipurpose hall / school auditorium”, average sound absorption coefficient, music clarity, echo interference degree, and sound pressure distribution are associated as acoustic evaluation items. Among the acoustic evaluation items, the average sound absorption coefficient is associated with "suitable: a1 to a2, examination required: a3 to a4, unsuitable: a3 to a4" as evaluation criteria. This evaluation criterion indicates that when the average sound absorption coefficient obtained as a result of the simulation is in the range of a1 to a2, the evaluation result is "appropriate", that is, in the appropriate range, and as a result of the simulation. When the obtained average sound absorption coefficient is in the range of a3 to a4, it is shown that "examination required", that is, examination is necessary as the evaluation result, and the average sound absorption coefficient obtained as a result of the simulation is When it is in the range of a5 to a6, it is shown as "inappropriate", that is, in the inappropriate range as the evaluation result.
Further, among the acoustic evaluation items, the music intelligibility, the echo interference degree, and the sound pressure distribution are also associated with the evaluation criteria corresponding to each.

For the room use "multipurpose hall / live house", the average sound absorption coefficient and the echo interference degree are associated with each other as acoustic evaluation items. The average sound absorption coefficient and the degree of echo interference in the acoustic evaluation items are associated with evaluation criteria corresponding to each.
For the room use "meeting room (medium to large) / classroom", average sound absorption coefficient, voice intelligibility, and echo interference degree are associated as acoustic evaluation items. The average sound absorption coefficient, voice intelligibility, and echo interference degree in the acoustic evaluation items are associated with evaluation criteria corresponding to each.
As described above, the storage unit 120 stores different combinations of the acoustic evaluation items and the evaluation criteria in the evaluation items according to the room use.

Here, each room of the concert hall, the multipurpose hall, and the school auditorium corresponds to the room use "concert hall / multipurpose hall / school auditorium". That is, the concert hall corresponds to the "concert hall / multipurpose hall / school auditorium", and the school auditorium corresponds to the "concert hall / multipurpose hall / school auditorium".

In addition, each room of the multipurpose hall and the live house corresponds to the room use "multipurpose hall / live house". That is, the multipurpose hall corresponds to the "multipurpose hall / live house", and the live house corresponds to the "multipurpose hall / live house".

In addition, each of the medium-sized conference room, the large-sized conference room, and the classroom corresponds to the room use "meeting room (medium to large) / classroom". That is, a medium-sized conference room corresponds to a "meeting room (medium to large) / classroom", and a classroom corresponds to a "meeting room (medium to large) / classroom".

Such a storage unit 120 may be a storage medium such as an HDD (Hard Disk Drive), a flash memory, an EEPROM (Electrically Erasable Programmable Read Only Memory), a RAM (Random Access read / writer) Or it is composed of any combination of these storage media. Further, the storage unit 120 can use, for example, a non-volatile memory.

Next, returning to FIG. 1, the room use input unit 130 accepts the input of the room use for designating the room use. For example, the room use input unit 130 receives input for room use by operating an input device such as a keyboard or a mouse provided outside the interface device 10. As an example, the room use input unit 130 may display a pull-down menu on which a room use can be selected on the display screen, and accept a selection input of which room use is selected from the pull-down menu. can. Further, when the room use is input from the data addition unit 110 as one of the calculation conditions, the room use input unit 130 may obtain the room use input by the data addition unit 110.

The evaluation rule selection unit 140 reads out the input acoustic evaluation items and evaluation criteria according to the room use from the storage unit. Further, the evaluation rule selection unit 140 changes at least one of the read evaluation items and the evaluation criteria according to an instruction to be changed input from the outside. The evaluation rule selection unit 140 outputs the acoustic evaluation items and the evaluation criteria to the acoustic simulation device 20.

The control unit 150 controls each unit of the device.
The output unit 160 outputs the determination result to the outside. For example, the output unit 160 causes a display device provided outside the interface device 10 to display the determination result, or causes the liquid crystal display panel provided in the interface device 10 to display the determination result.

Here, in this embodiment, the case where the interface device 10 is configured as a device different from the acoustic simulation device 20 and the determination device 30 will be described, but at least a part of the functions of the interface device 10 is the acoustic simulation device 20. Alternatively, it may be provided in the determination device 30. Further, at least a part of the functions of the interface device 10 may be incorporated as a plug-in tool (software for realizing the extended function of the acoustic simulation device 20) of the acoustic simulation device 20 or the determination device 30.

The acoustic simulation device 20 simulates the acoustics in the room. This room acoustic simulation is performed, for example, by geometrical acoustic calculation based on a geometrical acoustic method. The geometrical acoustics calculation may be performed using the calculation function of the plug-in tool that realizes the function of the interface device 10, or an external program constructed using a computer language such as Python may be used from the plug-in tool. It may be a form of calling and executing.

The acoustic simulation device 20 performs an acoustic simulation. For this acoustic simulation, an existing acoustic simulation system or software may be used. As a simulation program for performing acoustic simulation, for example, in Patent Document 1, "sound line method" and "imaginary image method" are used, the outline of the chamber shape is examined by "sound line method", and various types are used by "imaginary image method". A simulation program for calculating an evaluation index / impulse response is provided. In this embodiment, the simulation unit 210 provides a simulation program for calculating various evaluation indexes / impulse response using only the “sound line method”. The case of using it will be described. Here, the chamber shape is created using 3D CAD software.

The determination device 30 determines in the acoustic evaluation item the calculation result corresponding to the acoustic evaluation item read by the evaluation rule selection unit 140 among the calculation results (acoustic data) obtained by the acoustic simulation device 20. Judgment is made using the specified evaluation criteria, and the judgment result is obtained.
Further, the determination device 30 indicates that the determination result (for example, “appropriate” or “inappropriate”) corresponding to whether or not the evaluation criteria defined in the acoustic evaluation item is satisfied as the determination result needs to be examined. Obtain one of the judgment results (for example, "examination required").
The determination device 30 determines in which range (range indicated by the evaluation standard) the calculation result of the acoustic simulation corresponds to the numerical value corresponding to the “evaluation standard” defined in the acoustic evaluation item, thereby ○ (appropriate). , △ (examination required), × (inappropriate) can be determined. That is, the designer himself does not have to study the acoustics of the space to be evaluated based on the calculation results of the acoustic simulation.

Here, the calculation and determination processing of the indoor acoustic evaluation index (acoustic evaluation item) executed by the acoustic simulation device 20 may be calculated using the calculation function of the plug-in tool of the 3D CAD software, for example. An external program constructed using a computer language such as Python may be called from a plug-in tool and executed.

Further, when incorporating the above-mentioned external programs in order to realize the functions of the interface device 10, the acoustic simulation device 20, and the determination device 30, the operator (for example, the designer) does not directly operate the device, but 3D CAD. It may be executed in conjunction with the operation of the plug-in tool of the software, and the calculation result may be displayed on the 3D CAD software and the plug-in tool thereof. In this case, the operator (for example, the designer) does not need to be aware of the execution of the external program.

Next, the operation of the room acoustic evaluation system 1 described above will be described. FIG. 3 is a flowchart illustrating the operation of the room acoustic evaluation system 1.
The designer inputs the chamber shape model representing the chamber shape and the calculation conditions via the input device connected to the outside of the interface device 10. For example, the room shape model can generate a room shape model by creating a three-dimensional building shape using 3DCAD software. The calculation conditions are input using the plug-in tool of 3D CAD software.
The data addition unit 110 of the interface device 10 acquires the chamber shape model based on the operation content operated for the input device (step S101) and acquires the calculation conditions (step S102, step S103, step S104). .. Here, the data input as the calculation conditions include the type of finishing material (step S102), the sound source / sound receiving position (step S103), various other calculation conditions (step S104), and the like.
The "type of finishing material" is, for example, a material used as an interior for a room wall, ceiling, floor, or the like. Different types of finishing materials have different acoustic characteristics (sound absorption characteristics, etc.) in the space.
The "sound source / sound receiving position" represents a position where sound is generated inside the room (sound source position) and a position where sound is heard in the audience seat or the like. The sound receiving positions may be arranged individually, or may be automatically arranged by designating an area.
The "other various calculation conditions" may include data used for performing an acoustic simulation, and are, for example, setting conditions relating to the accuracy of the simulation. If the accuracy of this simulation is set low, the calculation time will be short, and if the accuracy of the simulation is set high, the calculation time will be long. The accuracy of the simulation may be arbitrarily set by the designer (operator).
When the data addition unit 110 acquires the chamber shape model and the calculation conditions, the data addition unit 110 outputs the acquired chamber shape model and the calculation conditions to the acoustic simulation device 20.

The room use input unit 130 acquires the room use input from the designer via the input device (step S105).
When the room use is acquired, the evaluation rule selection unit 140 reads out the acoustic evaluation items and the evaluation criteria according to the room use acquired by the room use input unit 130 from the storage unit 120 (step S106). For example, when the acquired room use is a "concert hall", the evaluation rule selection unit 140 may use the storage unit 120 as acoustic evaluation items such as "average sound absorption coefficient", "music clarity", and "echo interference". In addition to reading out the "sound pressure distribution", as evaluation criteria corresponding to "average sound absorption coefficient", "suitable: a1 to a2, examination required: a3 to a4, unsuitable: a5 to a6", evaluation corresponding to "music clarity" As a standard, "suitable: b1 to b2, examination required: b3 to b4, unsuitable: b5 to b6", and as an evaluation standard corresponding to "echo interference degree", "suitable: c1 to c2, examination required: c3 to c4, unsuitable: “Appropriate: d1 to d2, examination required: d3 to d4, unsuitable: d5 to d6” are read out as evaluation criteria corresponding to “c5 to c6” and “sound pressure distribution”.
When the evaluation rule selection unit 140 reads out the acoustic evaluation item and the evaluation standard, the evaluated acoustic evaluation item and the evaluation standard are set (temporarily stored) as a condition to be used for the evaluation (step S107, step S108), and are set. The contents are displayed on the display device connected to the interface device 10.

FIG. 4 is a diagram showing an example of a display screen. On the display screen, for example, a room use (reference numeral 401), an acoustic evaluation item (reference numeral 402), and an evaluation standard (reference numeral 403) are displayed based on the setting contents.
Based on the contents displayed on this display screen, the designer can confirm the contents currently set for the room use, the acoustic evaluation items applied to this room use, and the evaluation criteria. can. Here, the evaluation rule selection unit 140 reads out the acoustic evaluation items and the evaluation criteria, so that the "acoustic evaluation items" and the "evaluation criteria" are set according to the "room use" set by the operator as described above. Although it is set automatically, the operator can arbitrarily enter these setting values. The designer confirms the contents displayed on the display screen, and if there are items that he / she wants to change regarding the acoustic evaluation items and evaluation criteria, he / she inputs them via the input device to obtain the acoustic evaluation items and the evaluation criteria. You can change the settings for at least one of them.
When the designer inputs an instruction to change the acoustic evaluation item or the evaluation standard, the evaluation rule selection unit 140 changes the acoustic evaluation item or the evaluation standard according to the change instruction. For example, when the designer inputs an instruction to change the acoustic evaluation item, the evaluation rule selection unit 140 changes the acoustic evaluation item according to the change instruction. The change of the acoustic evaluation item may be, for example, at least one of addition of the acoustic evaluation item, replacement of the acoustic evaluation item, and deletion of any one of the acoustic evaluation items.
Further, when the designer inputs an instruction to change the evaluation standard, the evaluation rule selection unit 140 changes the evaluation standard according to the instruction to change the evaluation standard. The change of the evaluation standard is, for example, at least one of the range of the standard value corresponding to "appropriate", the range of the standard value corresponding to "need to be examined", and the range of the standard value corresponding to "inappropriate". You may.
By changing the acoustic evaluation items and evaluation criteria, the designer can evaluate the acoustic under arbitrary conditions as needed.

Further, the designer inputs an instruction for designating the display method of the evaluation result via the input device. The control unit 150 acquires an instruction input by the designer from the input device to specify the display method of the evaluation result (step S109). This "method of displaying the evaluation result" is a setting content for designating the item and the display mode of the simulation result to be displayed on 3D CAD and its plug-in tool.
Here, after all the conditions such as the room shape model, room use, acoustic evaluation items, evaluation criteria, and other various calculation conditions are set, for example, by clicking the "execution button", the setting conditions are output and simulated. A series of functions up to execution, evaluation, and judgment may be activated.

When the acoustic evaluation item and the evaluation standard are output from the control unit 150, the acoustic simulation device 20 acquires the acoustic evaluation item and the evaluation standard, and also obtains the chamber shape model and calculation conditions output from the data addition unit 110. And get. The simulation unit 210 executes an acoustic simulation based on the chamber shape model and the calculation conditions (step S201).
When the acoustic simulation is performed by the acoustic simulation apparatus 20, the determination device 30 obtains a plurality of acoustic evaluation items and evaluation values for the acoustic evaluation items as the calculation result of the acoustic simulation (step S202). Here, when the calculation result of the acoustic simulation does not include a plurality of acoustic evaluation items and the evaluation values themselves for the acoustic evaluation items, the simulation unit 210 calculates the evaluation values corresponding to the acoustic evaluation items by acoustic simulation. It may be calculated from the result of.

When the calculation result of the acoustic simulation is obtained, the determination device 30 evaluates the calculation result of the acoustic simulation using the acoustic evaluation items and the evaluation criteria obtained from the evaluation rule selection unit 140 (step S203).
For example, the determination device 30 has a plurality of acoustic evaluation items obtained as calculation results of acoustic simulation, and among the evaluation values for the acoustic evaluation items, the acoustic evaluation corresponding to the acoustic evaluation item obtained from the evaluation rule selection unit 140. By specifying the evaluation value of the item and determining which range of the evaluation criteria corresponding to the acoustic evaluation item obtained from the evaluation rule selection unit 140, the specified evaluation value belongs to "appropriate", Obtain the judgment result of whether it corresponds to "examination required" or "inappropriate".
For example, when "room use" is set as "concert hall", "average sound absorption coefficient", "music intelligibility", "echo interference", and "sound pressure distribution" are used as acoustic evaluation items. The "evaluation criteria" corresponding to each "acoustic evaluation item" used in the above are assigned as the evaluation criteria used in the evaluation. For example, "suitable: a1 to a2, examination required: a3 to a4, unsuitable: a5 to a6" is assigned to "average sound absorption coefficient", and "suitable: b1 to b2, examination required" is assigned to "music intelligibility". : B3 to b4, unsuitable: b5 to b6 "is assigned.

For example, the determination device 30 determines that the evaluation result is "appropriate" when the evaluation value of the "average sound absorption coefficient" falls between "a1 and a2", and the evaluation value of the "average sound absorption coefficient". However, if it falls between "a3 to a4", it is determined that the evaluation result is "need to be examined". The determination device 30 makes such a determination for each of the acoustic evaluation items obtained from the control unit 150.
Here, acoustic evaluation items and evaluation criteria are read out by the evaluation rule selection unit 140 according to the room use input by the designer, and these acoustic evaluation items and evaluation criteria are used for the calculation result of the acoustic simulation. Evaluation is done. Therefore, it is not necessary for the designer himself to determine and input how to set the acoustic evaluation items and evaluation criteria corresponding to the room use. Moreover, it is not necessary for the designer himself to evaluate the calculation result of the acoustic simulation.

When the determination result is obtained for each of the acoustic evaluation items to be evaluated, the determination device 30 outputs the calculation result of the acoustic simulation and the obtained determination result to the interface device 10. The calculation result of the acoustic simulation may be output from the acoustic simulation device 20 to the interface device 10 instead of being output from the determination device 30 to the interface device 10.

When the control unit 150 of the interface device 10 acquires the calculation result of the acoustic simulation and the determination result determined by the determination device 30, the output unit 160 outputs the acquired calculation result and determination result of the acoustic simulation. The output unit 160 of the interface device 10 displays the calculation result of the acoustic simulation obtained from the acoustic simulation device 20 on the display screen of the display device (step S301), and acoustically evaluates the calculation result obtained from the acoustic simulation device 20. The determination result determined based on the item is displayed as the evaluation result on the display screen of the display device (step S302).

For example, when the evaluation result in the "average sound absorption coefficient" is "appropriate", the output unit 160 displays on the display screen that the "average sound absorption coefficient" is "appropriate". Similarly for the other acoustic evaluation items, the output unit 160 displays on the display screen which of the "appropriate", "examination required", and "inappropriate" evaluation results is for each acoustic evaluation item.
Here, the output unit 160 can also display the evaluation result “appropriate” by using a symbol such as “◯”. Similarly, when the evaluation result is "examination required", the output unit 160 can be displayed as "examination required", but can also be displayed using a symbol such as "△", and is evaluated. If the result is "inappropriate", it can be displayed as "inappropriate", but it can also be displayed using a symbol such as "x". Which display method is used for display may be specified in "setting of result display method" in step S109. The output unit 160 displays according to the display method specified by the "setting of the result display method". As a result, the designer can visually recognize the determination result in a manner that he / she can easily grasp.

According to the embodiment described above, even if the person in charge of design does not have specialized knowledge about acoustics, the creation of a calculation model, the setting of calculation conditions, and the acoustics are within the range of the design knowledge and technique possessed by the designer. It is possible to execute a simulation. Then, when the acoustic simulation result is obtained, the room acoustic evaluation system 1 evaluates and judges the calculated result of the acoustic simulation based on the acoustic evaluation items and the evaluation criteria, and outputs the result, so that the calculation and the simulation The evaluation result can be obtained without the designer (operator) himself evaluating the result. Therefore, the designer can consistently eliminate the need for specialized knowledge of acoustics when using the room acoustic evaluation system 1.

In the above-mentioned Patent Document 1, the system presents the calculation result of the simulation by the sound field reproduction and the three-dimensional display of the sound line path, and the designer sees and hears them and evaluates them. Knowledge and experience are required.
On the other hand, according to the present embodiment, by setting the room use, a plurality of acoustic evaluation items obtained from the results of the acoustic simulation and the acoustic evaluation for determining whether the evaluation values for the acoustic evaluation items are suitable for the room use are determined. Items and evaluation criteria are set automatically. Then, according to the present embodiment, the evaluation results obtained by evaluating the calculation of the acoustic simulation are obtained in the manners of "○", "△", "×" or "appropriate", "examination required", "inappropriate" and the like. Is displayed. This enables the designer to make a judgment based on the evaluation result without having to have acoustic expertise.

Further, in Patent Document 1, there is no description of an interface for performing operations such as room shape input and various settings, but in the present embodiment, all operations are performed using general-purpose 3D CAD software and its plug-in tool. It is very easy for the designer to operate because it can be built.

Further, according to the above-described embodiment, since the room acoustics can be predicted and evaluated without entrusting the evaluation and acoustic examination to a building acoustic expert or a specialist contractor, the hurdle to the examination can be lowered and the examination can be outsourced. The required cost can be reduced, and the time required for consignment can be reduced, so that the time can be shortened.
In addition, when the main room acoustic evaluation system 1 is used in the initial stage of interior space design, it is possible to clarify the acoustic issues that should be considered as soon as possible, and cost performance can be achieved by considering countermeasures from the initial stage. Highly designed is possible.
In addition, many pattern studies can be conducted from the initial stage of design to detailed examination, enabling highly complete acoustic design.

The functions of the data addition unit 110, the storage unit 120, the room use input unit 130, the evaluation rule selection unit 140, the control unit 150, the output unit 160, the determination unit 220, the acoustic simulation device 20, and the determination device 30 in the above-described embodiment are computerized. It may be realized by. In that case, a program for realizing this function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by a computer system and executed. The term "computer system" as used herein includes hardware such as an OS and peripheral devices. Further, the "computer-readable recording medium" refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, or a CD-ROM, and a storage device such as a hard disk built in a computer system. Further, a "computer-readable recording medium" is a communication line for transmitting a program via a network such as the Internet or a communication line such as a telephone line, and dynamically holds the program for a short period of time. It may also include a program that holds a program for a certain period of time, such as a volatile memory inside a computer system that is a server or a client in that case. Further, the above program may be for realizing a part of the above-mentioned functions, and may be further realized for realizing the above-mentioned functions in combination with a program already recorded in the computer system. It may be realized by using a programmable logic device such as FPGA (Field Programmable Gate Array).

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and the design and the like within a range not deviating from the gist of the present invention are also included.

1 ... Room acoustic evaluation system, 10 ... Interface device, 20 ... Acoustic simulation device, 30 ... Judgment device, 110 ... Data addition unit, 120 ... Storage unit, 130 ... Room use input unit, 140 ... Evaluation rule selection unit, 150 ... Control unit, 160 ... Output unit, 210 ... Simulation unit, 220 ... Judgment unit

Claims (8)

A storage unit that stores different combinations of acoustic evaluation items, which are items for evaluating acoustics, and evaluation criteria for the acoustic evaluation items, depending on the room use of the space for which acoustics are evaluated.
An acquisition unit that acquires acoustic data that is the calculation result of acoustic simulation for the space to be evaluated, and
An input unit that accepts input for the room use that specifies the room use,
An evaluation rule selection unit that reads out the acoustic evaluation items and the evaluation criteria according to the input room use from the storage unit, and
Of the calculation results included in the acoustic data, the calculation results corresponding to the acoustic evaluation items read out by the evaluation rule selection unit are judged using the evaluation criteria defined in the acoustic evaluation items, and the judgment results are determined. Judgment unit to obtain and
Room acoustic evaluation system with. Claim 1 includes at least one of the average sound absorption coefficient, music intelligibility, voice intelligibility, echo interference, and sound pressure distribution in the acoustic evaluation item stored in the storage unit. The described room acoustic evaluation system. The claim that the determination unit obtains, as a determination result, one of a determination result corresponding to whether or not the evaluation criteria defined in the acoustic evaluation item is satisfied, and a determination result indicating that examination is necessary. 1 or the room acoustic evaluation system according to claim 2. The room acoustic evaluation system according to claim 1 or 2, further comprising a data addition unit that accepts inputs of a chamber shape model representing a chamber shape and calculation conditions and outputs the data to the acoustic simulation. It has a modeling unit that generates a chamber shape model, which is a three-dimensional model that represents the chamber shape of the object for which acoustics are evaluated.
The room acoustic evaluation system according to claim 4, wherein the data addition unit receives a room shape model generated by the modeling unit. It has an acoustic simulation unit that performs the acoustic simulation.
The indoor acoustic evaluation system according to any one of claims 1 to 5, wherein the acquisition unit obtains a calculation result obtained by performing an acoustic simulation by the acoustic simulation unit. The indoor acoustic evaluation system according to any one of claims 1 to 6, further comprising an output unit that outputs the result of the acoustic simulation and the determination result of the determination unit. It is an acoustic evaluation method performed by the indoor acoustic evaluation system.
The acquisition unit of the room acoustic evaluation system acquires acoustic data which is a calculation result of acoustic simulation performed on the space to be evaluated.
The input unit of the room acoustic evaluation system accepts the input of the room use that specifies the room use of the space for which the sound is evaluated.
The evaluation rule selection unit of the room acoustic evaluation system refers to a storage unit that stores different combinations of acoustic evaluation items, which are items for evaluating acoustics, and evaluation criteria in the acoustic evaluation items, depending on the room application. The acoustic evaluation item and the evaluation standard according to the input room use are read out from the storage unit.
Among the calculation results included in the acoustic data, the determination unit of the room acoustic evaluation system determines the evaluation criteria defined in the acoustic evaluation item for the calculation result corresponding to the acoustic evaluation item read by the evaluation rule selection unit. An acoustic evaluation method in which a judgment is made using the above and the judgment result is obtained.

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