Sound environment improvement evaluation method

Abstract

To provide information for easily evaluating the improvement of acoustic environment through structural modification.SOLUTION: A method includes: Step (#1) of inputting, to a computer, pre-modification structural information indicating at least a shape of the indoor space which has not been structurally modified and a partition style; Step (#3) of setting a virtual sound source inside the indoor space and inputting the sound source to the computer; Step (#4) of causing the computer to output pre-modification acoustic environment information indicating acoustic environment in the indoor space which has not been structurally modified, based on the pre-modification structural information and the virtual sound source; Step (#2) of inputting, to the computer, structural modification information specifying the contents of structural modification; and Step (#4) of causing the computer to output post-modification acoustic environment information indicating acoustic environment in the indoor space which has been structurally modified, based on the structural modification information and the virtual sound source. The pre-modification acoustic environment information and the post-modification acoustic environment information are output in an auditory output mode.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a sound environment improvement evaluation method for evaluating the state of improvement of the sound environment in the indoor space of a building following a structural modification. [Background technology]

[0002] In buildings such as office buildings and rental buildings, the interior is divided into various shapes and sizes and rented out to multiple offices or tenants. Each office or tenant has walls, doors, etc. installed or modified to create an interior space that meets the user's needs before they move in.

[0003] For example, an office is divided into an office area where employees and other personnel perform their work, a conference room, a president's office, and other private rooms.

[0004] Indoor spaces such as offices are subject to sound environment restrictions depending on the use of the space or compartment. For example, sound leakage from conference rooms and private rooms must be kept below a certain level, while office areas must be quieter than a certain level.

[0005] It is preferable to completely improve the sound environment of the indoor space before moving in, but it is not easy to improve the sound environment at the time of moving in, so in many cases the sound environment of the indoor space is improved through renovation work (structural changes) after moving in.

[0006] As disclosed in Patent Document 1, it is possible to simulate noise by inputting the walls, floors, etc. to be used, but it is not possible to evaluate the improvement in the sound environment that will accompany the renovation work, and it has been difficult to evaluate how best to carry out the renovation work at the design stage of the renovation work.

[0007] Furthermore, because costs and restrictions on indoor space use during construction vary depending on the type of renovation work (construction level), it is appropriate to determine the most efficient renovation work (structural changes) by taking into account the level of construction and the degree of improvement to the sound environment. For example, construction that renovates the ceiling is expected to have a significant effect on improving the sound environment compared to construction that does not renovate the ceiling, but tends to be significantly more costly. In addition, various alarms, sprinklers, air conditioning equipment, etc. may be installed on the ceiling, making the office (indoor space) unusable during the ceiling renovation. Furthermore, if the construction extends from the ceiling to the slab of the upper floor, an even greater improvement in the sound environment is expected, but costs will be higher and the indoor space will be unusable for a longer period of time. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Publication No. 11-161147 Summary of the Invention [Problem to be solved by the invention]

[0009] An object of the present invention is to provide information that allows for easy evaluation of improvements in the sound environment that accompany structural changes. [Means for solving the problem]

[0010] In order to achieve the above-mentioned object, a sound environment improvement evaluation method according to one embodiment of the present invention is a sound environment improvement evaluation method for evaluating the improvement of the sound environment of an indoor space due to structural modification, and includes the steps of: inputting pre-modification structural information indicating at least the shape and partition configuration of the indoor space before the structural modification is performed into a computer; setting a virtual sound source inside the indoor space and inputting the information into the computer; causing the computer to output pre-modification sound environment information indicating the sound environment in the indoor space before the structural modification is performed based on the pre-modification structural information and the virtual sound source; inputting structural modification information that specifies the content of the structural modification into the computer; and causing the computer to output post-modification sound environment information indicating the sound environment in the indoor space after the structural modification is performed based on the structural modification information and the virtual sound source, wherein the pre-modification sound environment information and the post-modification sound environment information are output in a manner that is output audibly.

[0011] According to the above configuration, the sound environment after the structural change is audibly output, so that the effect of the structural change on the sound environment can be easily confirmed, and as a result, the improvement of the sound environment due to the structural change can be easily evaluated.

[0012] The method may further include a step of setting a measurement point within the indoor space and inputting the measurement point into the computer, wherein the pre-change sound environment information and the post-change sound environment information include an expected sound that is expected to be heard at the measurement point when a pseudo-sound is generated from the virtual sound source.

[0013] According to the above configuration, when a predetermined pseudo sound is generated from a virtual sound source, the expected sound to be heard at the set measurement point is output, so that the sound at the measurement point can be confirmed by comparing it with the pseudo sound. As a result, the sound environment at the measurement point after the structural change can be easily confirmed, and the improvement of the sound environment due to the structural change can be easily evaluated.

[0014] The method may further include the steps of setting measurement points within the indoor space and inputting the measurement points into the computer, and setting background noise levels at the measurement points and inputting the background noise levels into the computer, wherein the pre-change sound environment information and the post-change sound environment information include a sound environment that takes into account the set background noise level.

[0015] Indoor spaces such as offices have a certain level of background noise, which is a steady background sound. It can be assumed that background noise always occurs at a constant level, and the sound environment in indoor spaces such as offices is significantly affected by background noise, so it is appropriate to express it in comparison with the background noise.

[0016] According to the above configuration, by using background noise level as the reference for the sound environment, it is possible to confirm a more realistic sound environment. As a result, it is possible to easily evaluate the improvement of the sound environment due to structural changes.

[0017] In addition, a plurality of measurement points can be set, an output image showing the indoor space and positions in the indoor space corresponding to the measurement points is displayed, the output image can accept an operation to select the measurement points, and the pre-change sound environment information and the post-change sound environment information may be the predicted sound at the measurement points selected in the output image.

[0018] According to the above configuration, it is possible to select a measurement point from the output image showing the indoor space and generate a predicted sound that represents the sound environment at the measurement point. As a result, it is possible to easily select a measurement point in the indoor space and check the predicted sound, and it is possible to easily evaluate the improvement of the sound environment due to structural changes.

[0019] The method may further include a step of setting measurement points within the indoor space and inputting the measurement points into the computer, wherein the pre-change sound environment information and the post-change sound environment information correspond to sound pressure levels at the measurement points when sound is generated from the virtual sound source.

[0020] A typical example of the sound environment is the sound pressure level, which is an index showing the pitch (loudness) of the sound. With the above configuration, the sound pressure level, which is an indicator of the state of the sound environment, can be easily confirmed, making it easy to evaluate the improvement of the sound environment resulting from structural changes.

[0021] The method may further include a step of setting a measurement point inside the indoor space and inputting the measurement point into the computer, wherein the pre-change sound environment information and the post-change sound environment information include the reverberation time of the sound at the measurement point when the sound is generated from the virtual sound source.

[0022] With the above configuration, it is possible to output the reverberation time at any position in a room space before and after a structural change, making it easy to confirm changes in the sound environment at a specific position. As a result, it is easy to confirm improvements in the sound environment at positions that are particularly important in improving the sound environment, and it is possible to efficiently evaluate improvements in the sound environment due to a structural change.

[0023] Furthermore, a plurality of pieces of structural modification information may be input, and the post-modification sound environment information may be output in association with each piece of structural modification information input.

[0024] According to the above configuration, it is possible to easily confirm what structural changes will improve the sound environment to what extent, and as a result, it is possible to easily evaluate the improvement in the sound environment that accompanies the structural changes.

[0025] The pre-change sound environment information and the post-change sound environment information may be output in a manner that allows comparison between them.

[0026] According to the above configuration, since the improvement in the sound environment can be compared and output in response to the structural change, the improvement in the sound environment resulting from the structural change can be more easily evaluated.

[0027] In addition, the structural change , interval Wall extension to slab The leader It may include. A sound environment improvement evaluation method according to one embodiment of the present invention is a sound environment improvement evaluation method for evaluating an improvement in the sound environment of an indoor space associated with a structural change, and includes the steps of: inputting pre-change structural information indicating at least the shape and partition configuration of the indoor space before the structural change is made into a computer; setting a virtual sound source inside the indoor space and inputting the setting to the computer; causing the computer to output pre-change sound environment information indicating the sound environment in the indoor space before the structural change is made based on the pre-change structural information and the virtual sound source; inputting structural change information specifying the content of the structural change into the computer; and causing the computer to output post-change sound environment information indicating the sound environment in the indoor space after the structural change is made based on the structural change information and the virtual sound source, wherein the pre-change sound environment information and the post-change sound environment information are output in a manner that is output aurally, and the structural change , interval Wall extension to slab The leader include.

[0028] The sound environment changes depending on the shape of the indoor space, the condition of the partition walls, the condition of the doors, ceiling, and floor, the soundproofing materials used, etc. With the above configuration, it is possible to output the sound environment in a state where various structural modifications have been made. As a result, information for evaluating the improvement in the sound environment resulting from various structural modifications is provided, making it easy to evaluate the improvement in the sound environment resulting from structural modifications. [Brief explanation of the drawings]

[0029] [Figure 1] FIG. 1 is a diagram illustrating an example of an office section. [Figure 2] FIG. 1 is a diagram illustrating an example of the configuration of walls, ceilings, doors, etc. in an office. [Figure 3] FIG. 1 is a diagram illustrating the configuration of a sound environment improvement evaluation device. [Figure 4] FIG. 1 is a diagram illustrating a flow of a sound environment improvement evaluation method. [Figure 5] 10A and 10B are diagrams illustrating an example of visually outputting sound leakage, which is sound environment information. [Figure 6] FIG. 10 is a diagram illustrating an example of improvement of reverberation time, which is sound environment information. [Figure 7] 10A and 10B are diagrams illustrating an example of auditory output of sound leakage, which is sound environment information. DETAILED DESCRIPTION OF THE INVENTION

[0030] Office buildings, rental buildings, and other buildings are rented out as multiple offices (corresponding to indoor spaces). The office tenant divides the rented office into spaces of a specified shape and size for use.

[0031] As shown in Figures 1 and 2, an office is divided into various spaces such as an office space 2, a conference room 3, and a president's office 4 for use. Each space is separated by walls 6, and doors 7 are installed in the walls 6 as needed. The office has a ceiling 9, and various alarm devices 11, lighting, sprinklers, etc. are installed in the ceiling 9. Various wiring 13 and piping are installed in the space between the ceiling 9 and a slab 12 (floor) on the upper floor, and the alarm devices 11, lighting, sprinklers, etc. are connected to the wiring 13 and piping.

[0032] The required acoustic environment differs for each section, and it is difficult to divide the office (by construction at the time of occupancy) so that each section has an appropriate acoustic environment when occupants move in. For this reason, offices sometimes undergo structural changes (renovation and remodeling) after occupancy to improve the acoustic environment of each section.

[0033] The acoustic environment in an office depends on the soundproofing performance of the walls 6, floor, ceiling 9, doors 7, etc., the presence and size of gaps between the walls 6 and ceiling 9, and the presence and size of gaps between the doors 7 and floor. Soundproofing performance includes sound insulation, sound absorption, and vibration control / isolation. The acoustic environment is expressed in terms of sound pressure level and reverberation time. Sound pressure level is the loudness of sound. For example, it represents the loudness of sound generated by a sound source that penetrates the walls 6 and leaks to a specified measurement point 39 (see Figure 3), and is highly dependent on the soundproofing performance of the walls 6. Reverberation time is the time a generated sound remains after reflecting off the walls 6 and depends on the sound absorption performance of the walls 6. Here, reverberation time is defined as the time it takes for a generated sound to repeatedly reflect off the walls 6 and decay to 60 dB. A long reverberation time can cause feedback due to insufficient sound absorption in the walls 6, making it difficult for people to hear each other's voices when conversing in the same room. Additionally, since it is expected that there will be a certain level of background noise in the office, such as the operating noise of air conditioning and ventilation equipment, the sound environment information may take into account the influence of background noise. In other words, the sound environment information may be the ratio of the sound occurring at measurement point 39 to a predetermined background noise at measurement point 39.

[0034] Structural changes are made at various construction levels, such as changing the materials of floors and ceilings 9, adding, removing or changing the materials of walls 6, adding, removing or changing the materials of doors 7, and adding, removing or changing soundproofing building materials 15. Soundproofing building materials 15 are made of, for example, sound-absorbing materials, and can suppress sound reverberation by absorbing sound.

[0035] There are various levels of construction difficulty, ranging from simple work such as installing doors 7 and soundproofing materials 15 to modifications to walls 6, floors, and ceilings 9, or the addition of walls 6. For example, the level of difficulty varies depending on whether the work extends to the ceiling 9. Compared to work that does not modify the ceiling 9, work that modifies the ceiling 9 tends to be more complex, labor-intensive, and costly. Furthermore, work that extends beyond the ceiling 9 to the slab 12 often requires modifications to wiring 13 and piping, which tends to be even more complex, labor-intensive, and costly. Therefore, in the case of work related to walls 6, the construction level varies significantly depending on whether the wall 6 extends to the ceiling 9 or further to the slab 12. Therefore, work on the wall 6 extending to the slab 12 cannot be easily performed as a structural modification. Note that in Figure 2, the height of the wall 6 is indicated by an arrow, showing its relationship to the ceiling 9 and the slab 12. Walls 6 that do not reach the ceiling 9 are shown by solid lines, walls 6 that reach the ceiling 9 are shown by dashed lines, and walls 6 that reach the slab 12 are shown by dashed lines.

[0036] In other words, the content of the structural changes must be judged comprehensively based on the level of construction and the level of improvement in the sound environment that accompanies the structural changes.

[0037] Therefore, the sound environment improvement evaluation method according to this embodiment outputs the sound environment (sound environment information) before and after the structural change. The sound environment improvement evaluation method outputs pre-change sound environment information 41 (see FIG. 3), which is the sound environment information before the structural change, as well as post-change sound environment information 42 (see FIG. 3), which is the sound environment information after the structural change, making it possible to easily evaluate the improvement in the sound environment associated with the structural change at the design stage of the renovation work.

[0038] The sound environment information is the sound environment before and after a structural change, based on the sound generated by a virtual sound source set at an arbitrary position inside the office. In order to output the sound environment before and after the structural change, the sound environment improvement evaluation method inputs pre-change structural information 35 (see FIG. 3) and structural change information 36 (see FIG. 3), which are structural information indicating the state of the office before and after the structural change. The pre-change structural information 35 indicates at least the shape and partition wall configuration of the office before the structural change. The structural change information 36 indicates at least the shape and partition wall configuration of the office after the structural change, and is information that identifies the content of the structural change.

[0039] For example, structural changes include at least one of the following: shape changes including changes in the position of office sections; changes in the height, position, and shape of partition walls (walls 6); changes in the scope of construction (work) such as extending partition walls (walls 6) to the slab 12; changes in the shape of doors 7; changes in the shape of ceilings 9; addition of soundproofing building materials 15; removal of soundproofing building materials 15; and changes in the shape of floors.

[0040] The sound environment information is output as pre-change sound environment information 41, which indicates the sound environment in the office before the structural change, and post-change sound environment information 42, which indicates the sound environment in the office after the structural change. The pre-change sound environment information 41 and the post-change sound environment information 42 are displayed simultaneously or alternately. The sound environment information is output as sound pressure levels and reverberation times at a specified position for sounds generated from an arbitrarily set virtual sound source.

[0041] In this way, the sound environment improvement evaluation method according to this embodiment can output both pre-change sound environment information 41 and post-change sound environment information 42 before and after the structural change, with pre-change structural information 35 and structural change information 36 input, making it easy to check the improvement status of the sound environment in relation to the structural change. As a result, it is possible to easily evaluate the improvement of the sound environment associated with the structural change at the design stage of renovation work.

[0042] [Sound environment improvement evaluation] Next, with reference to FIGS. 1 and 2, a configuration for evaluating improvement in a sound environment using the sound environment improvement evaluation device (sound environment improvement evaluation method) will be described using FIGS.

[0043] The sound environment improvement evaluation device includes a control unit 18 and is connected to a display unit 19 and an input operation unit 21. The control unit 18 is configured as a computer equipped with a processor such as a CPU, and the functional blocks of the control unit 18 operate under the control of the processor. The control unit 18 simulates (calculates) the sound environment in accordance with the input information and outputs it. Specifically, the office conditions before and after the structural change are input to the control unit 18, and the control unit 18 outputs the sound environment before and after the structural change. By the sound environment improvement evaluation device outputting both the sound environment before and after the structural change, information for evaluating the improvement status of the sound environment due to the structural change is provided, making it possible to easily evaluate the improvement of the sound environment due to the structural change during the design stage of renovation work.

[0044] The display unit 19 is a display device such as a liquid crystal panel or a display, and displays images such as drawings showing the configuration and layout of the office, as well as various types of information. The input operation unit 21 accepts various manual operations. The display unit 19 may be a touch panel, in which case the input operation unit 21 may be configured to be operated via the display unit 19.

[0045] The control unit 18 includes, as an example of functional blocks, a structural information input unit 25, a sound source setting unit 26, a measurement point input unit 28, a sound environment calculation unit 29, an output control unit 31, and a storage unit 33.

[0046] The structural information input unit 25 accepts input of structural information, which is the state of the office before and after the structural change. The structural information is manually input via the input operation unit 21 and input to the structural information input unit 25. The structural information includes pre-change structural information 35, which indicates at least the shape and partition configuration of the office before the structural change, and structural change information 36, which specifies the content of the structural change.

[0047] The sound source setting unit 26 receives an input of a sound source position 38 of a virtual sound source that is manually input via the input operation unit 21 .

[0048] The measurement point input unit 28 receives input for setting a measurement point 39 that corresponds to an observation position of sound environment information for a virtual sound source. The sound pressure level and reverberation time of the sound generated by the virtual sound source at the measurement point 39 become the sound environment information at the measurement point 39.

[0049] The sound environment calculation unit 29 simulates (calculates) the sound environment based on the input information. That is, the sound environment calculation unit 29 calculates the sound environment at the measurement point 39 based on the structural information and the sound source position 38 of the virtual sound source.

[0050] The output control unit 31 controls the method of outputting sound environment information, which is the sound environment calculated by the sound environment calculation unit 29 .

[0051] The storage unit 33 stores various types of information. For example, the storage unit 33 stores pre-change structural information 35, structural change information 36, sound source position 38, and measurement point 39 that are input. The storage unit 33 also stores pre-change sound environment information 41 and post-change sound environment information 42, which correspond to the sound environment information calculated by the sound environment calculation unit 29.

[0052] In the sound environment improvement evaluation method using such a sound environment improvement evaluation device, first, the input operation unit 21 is operated to input pre-altered structural information 35 via the structural information input unit 25 (step (process) #1 in FIG. 4 ). The structural information input unit 25 stores the input pre-altered structural information 35 in the memory unit 33. When the sound environment improvement evaluation method is executed, various information such as office drawings is displayed on the display unit 19. Various information such as the pre-altered structural information 35 may be input using the input operation unit 21, the display unit 19, etc., while referring to the information displayed on the display unit 19.

[0053] The pre-change structural information 35 is the state of the office before the structural change (renovation), and includes at least the shape of the office including the layout of sections, and the form of partitions such as walls 6 and ceiling 9, and can also include information such as the position of doors 7, the presence or absence of gaps, the presence and type of soundproof building materials 15, the soundproofing performance, sound insulation performance, sound absorption performance, and vibration control / vibration damping performance of walls 6, ceiling 9, floors, doors 7, soundproof building materials 15, etc.

[0054] Next, the input operation unit 21 is operated to input the sound source position 38 of the virtual sound source via the sound source setting unit 26 (step (process) #2 in FIG. 4 ). The sound source position 38 of the virtual sound source may be input using the input operation unit 21, the display unit 19, etc., while referring to information displayed on the display unit 19. For example, the sound source position 38 may be set by directly touching the display unit 19 on an office drawing (output image) such as that displayed on the display unit 19 as shown in FIG. 5 . The sound source setting unit 26 stores the input sound source position 38 of the virtual sound source in the storage unit 33. The sound source position 38 of the virtual sound source is the position of the virtual sound source that is arbitrarily set inside the office.

[0055] Next, the sound environment calculation unit 29 calculates the sound environment in the office before the structural change based on the pre-change structural information 35 and the virtual sound source (sound source position 38) stored in the memory unit 33 (step (process) #3 in Figure 4), and outputs it as pre-change sound environment information 41.

[0056] Next, the input operation unit 21 is operated to input structure change information 36 via the structure information input unit 25 (step (process) #4 in FIG. 4). The structure information input unit 25 stores the input structure change information 36 in the storage unit 33. The structure change information 36 may be input using the input operation unit 21, the display unit 19, etc., while referring to the information displayed on the display unit 19.

[0057] The structural change information 36 is information indicating the details of the structural change (renovation work, remodeling). The structural change information 36 includes information such as changes to the shape of the office after the change, changes to the height, position, and shape of the partition wall (wall 6), extension of the partition wall (wall 6) to the slab 12, changes to the shape of the door 7, changes to the shape of the ceiling 9, addition of soundproofing building materials 15, removal of soundproofing building materials 15, and changes to the shape of the floor, and includes at least one of these. Furthermore, the structural change information 36 can include information such as the position of the door 7, the presence or absence of gaps, the presence and type of soundproofing building materials 15, and the soundproofing, sound insulation, sound absorption, and vibration control / vibration damping performance of the changed walls 6, ceiling 9, floor, door 7, soundproofing building materials 15, etc.

[0058] Next, the sound environment calculation unit 29 calculates the sound environment in the office after the structural change has been made based on the structural change information 36 and the virtual sound source (sound source position 38) stored in the memory unit 33 (step (process) #5 in Figure 4).

[0059] Then, the calculated pre-change sound environment information 41 and post-change sound environment information 42 are output as sound environment information before and after the structural change (step (process) #6 in FIG. 4). The pre-change sound environment information 41 and the post-change sound environment information 42 are displayed (output) on the display unit 19 simultaneously or alternately.

[0060] The order in which the pre-change structural information 35, the sound source position 38 of the virtual sound source, and the structural change information 36 are input is arbitrary, and the post-change sound environment information 42 may be calculated before the pre-change sound environment information 41 or simultaneously with the pre-change sound environment information 41.

[0061] The sound environment information (at least one of the pre-change sound environment information 41 and the post-change sound environment information 42) is the sound pressure level of the sound generated at the sound source position 38, and may also be the expected reverberation time.

[0062] For example, the pre-change sound environment information 41 and the post-change sound environment information 42 are visually output and displayed on the display unit 19 as a contour diagram or the like for an office drawing, as shown in FIG. 5. The office drawing is an output image showing the office and the positions of measurement points 39 in the office. The sound pressure level is highest at the sound source position 38 and decreases with increasing distance from the sound source position 38. Furthermore, the sound pressure level decreases as the sound passes through a wall 6 or the like, depending on the sound insulation performance of the wall 6 or the like. In other words, the sound pressure level changes depending on the distance from the sound source position 38, the presence or absence of a wall 6 or a door 7, and their sound insulation performance. The contour diagram can visually display the change (distribution) of the sound pressure level. The sound pressure level distribution can be expressed using different colors, shades, glass, etc. Furthermore, numerical values ​​indicating the sound pressure level may be displayed at multiple locations on the office drawing as the sound pressure level distribution or sound pressure level. In addition, the sound environment information before change 41 and the sound environment information after change 42, which are the sound environment information of the sound environment information, may not correspond to a blueprint of the office, but may be displayed visually so that the correspondence between the position in the office and sound environment information such as sound pressure level can be visually understood.

[0063] In this way, by outputting specific sound environment information before and after the structural change, it is possible to easily confirm and evaluate the improvement in the sound environment due to the structural change during the design stage of the renovation work. Furthermore, since the post-change sound environment information 42 is output based on the structural change information 36, which is specific content of the structural change, it is possible to confirm the extent to which the sound environment will be improved by what type of structural change, making it easier to confirm and evaluate the improvement in the sound environment due to the structural change. Furthermore, by visually displaying the sound environment information, it is easy to confirm the improvement in the sound environment, making it easier to evaluate the improvement in the sound environment due to the structural change.

[0064] [Another embodiment] (1) In the above embodiment, the sound environment information (at least one of the pre-change sound environment information 41 and the post-change sound environment information 42) is not limited to the distribution of sound pressure levels, but may be sound environment information that takes into account the predicted value of the sound pressure level at a predetermined measurement point 39, the reverberation time at the predetermined measurement point 39, or background noise previously set at the measurement point 39 (sound environment information corresponding to background noise), or may include a combination of these. Note that the background noise is input via the input operation unit 21 and stored in the memory unit 33 before the sound environment is calculated by the sound environment calculation unit 29.

[0065] For example, the output control unit 31 causes the display unit 19 to display, as sound environment information, the reverberation time of sound at a set measurement point 39 when sound is generated from a sound source position 38 of a virtual sound source. As shown in Fig. 6, pre-change sound environment information 41 and post-change sound environment information 42 are displayed simultaneously or alternately as sound environment information. The pre-change sound environment information 41 is a diagram showing the reverberation time for each frequency in the office before a structural change (current state), and the post-change sound environment information 42 is a diagram showing the reverberation time for each frequency in the office after a predetermined structural change has been made.

[0066] It is preferable to add a reference value for reverberation time to the sound environment information related to reverberation time, as shown in Figure 6. For example, the following reference values ​​may be added: a reference line indicating reference value A, which is the minimum reverberation level required for everyday conversation without hindrance; a reference line indicating reference value B, which is recommended for rooms such as ordinary classrooms and conference rooms where reverberation should be reduced to a certain extent; and a reference line indicating reference value C, which is recommended for rooms such as auditoriums and nursery schools where ease of hearing is important.

[0067] In this way, by displaying various types of sound environment information for which improvements are to be confirmed, it is possible to display information that corresponds to the sound environment for which improvements are required, and it is possible to easily and efficiently evaluate the improvement status of the sound environment due to structural changes during the design stage of renovation work.

[0068] (2) In each of the above embodiments, the sound environment information may be displayed auditorily. In this case, the control unit 18 is connected to the headphones 23. When the sound environment calculation unit 29 calculates the sound environment, the output control unit 31 causes the headphones 23 to emit a sound generated at the measurement point 39 input by the measurement point input unit 28 when a sound (an image sound source such as a voice) is generated from a virtual sound source (sound source position 38). When the sound environment information is generated as an actual sound from the headphones 23, the sound environment calculation unit 29 calculates the sound that the sound generated at the sound source position 38 will hear at the position input as the measurement point 39, and the output control unit 31 causes the calculated sound to be generated from the headphones 23. In this case, as shown in FIG. 7 , the output control unit 31 may generate a sound emanating from the measurement point 39 from the headphones 23 while displaying the position of the measurement point 39 on a drawing (output image) of the office. Alternatively, the sound may be generated from a speaker instead of the headphones 23.

[0069] In this way, by generating the calculated sound from the headphones 23, it is possible to directly confirm the sound environment before and after the structural change, and it is possible to easily evaluate the improvement in the sound environment due to the structural change at the design stage of the renovation work. This allows the sound pressure level to be confirmed not only visually but also aurally.

[0070] Instead of generating the sound pressure level from the headphones 23, or in addition to generating the sound pressure level from the headphones 23, the output control unit 31 may display the sound pressure level at the measurement points 39 on the office drawing. In this case, if multiple measurement points 39 are set, the sound pressure levels at each measurement point 39 may be displayed simultaneously. This makes it easy to see how sound leaks within the office.

[0071] (3) In each of the above embodiments, it is preferable that the pre-change sound environment information 41 and the post-change sound environment information 42 are output in a manner that allows comparison. In other words, it is preferable that the sound environment information is displayed in a manner that allows distinction between before and after the structural change. This makes it easier to evaluate the improvement in the sound environment due to the structural change.

[0072] (4) In each of the above embodiments, it is preferable that the pre-change sound environment information 41 is output in association with the pre-change structural information 35, and it is preferable that the post-change sound environment information 42 is output in association with the structural change information 36 for each input structural change information 36. This makes it easier to confirm the relationship between the office situation and the sound environment, and makes it easier to evaluate the improvement in the sound environment due to the structural change.

[0073] (5) In each of the above other embodiments, the measurement points 39 may not be input. In this case, the control unit 18 may not include the measurement point input unit 28. For example, when sound environment information is output as a contour diagram, the sound environment calculation unit 29 calculates the sound pressure level at each location throughout the office for a sound generated at the sound source position 38, and outputs the distribution of sound pressure levels throughout the office. Therefore, a specific measurement point 39 is not required. With the above configuration, the relationship between the office situation and the sound environment can be provided while optimizing the configuration of the control unit 18, making it easier to evaluate the improvement in the sound environment due to structural changes.

[0074] (6) In each of the above other embodiments, the sound environment information is not limited to the sound environment at the measurement point 39 of the sound generated from the virtual sound source (sound source position 38), but may be information relating to the sound environment under any conditions, regardless of the virtual sound source or the measurement point 39. This makes it possible to evaluate the improvement status of the sound environment by taking into account the sound environment caused by various sounds.

[0075] (7) In each of the above-described embodiments, the sound generated from the virtual sound source (sound source position 38) may be a single sound or a continuous sound. When the virtual sound source is a single sound, the pre-change sound environment information 41 and the post-change sound environment information 42 represent the sound environment a predetermined time after the single sound is generated. When the virtual sound source is a continuous sound, the pre-change sound environment information 41 and the post-change sound environment information 42 represent the sound environment in a state in which the continuous sound has reached equilibrium. This configuration allows the sound environment to be evaluated using a type of sound that corresponds to the sound environment to be checked and the office situation (structure), and allows for accurate evaluation of the improvement of the sound environment due to structural changes.

[0076] (8) In each of the above other embodiments, the sound environment information, i.e., the pre-change sound environment information 41 and the post-change sound environment information 42, may include an expected sound that is expected to be heard at the measurement point 39 if the pseudo-sound is generated from a virtual sound source (sound source position 38).

[0077] (9) The input of various information such as the pre-change structural information 35 is not limited to being performed via the input operation unit 21, but may be performed by any method such as data transfer. This makes it easier to evaluate the sound environment improvement.

[0078] (10) In each of the above embodiments, the sound environment improvement evaluation method is not limited to being implemented by a sound environment improvement evaluation device, but may be implemented by any device. Furthermore, the sound environment improvement evaluation device (controller 18) is not limited to being configured with the above-described functional blocks, but may be configured with any functional blocks. For example, each functional block of the controller 18 may be further subdivided, or conversely, some or all of the functional blocks may be combined. Furthermore, the sound environment improvement evaluation method is not limited to being implemented using the above-described sound environment improvement evaluation device, and some or all of the functions of the controller 18 may be implemented by software. A program related to the software is stored in any storage device, such as the memory unit 33, and executed by a processor, such as a CPU, included in the controller 18 or a separately provided processor.

[0079] (11) In each of the above-described embodiments, the sound environment improvement evaluation is not limited to the sound environment of an office, but can be performed on the sound environment of any area in a building such as a tenant building. [Industrial Applicability]

[0080] The present invention can be applied to evaluation of the sound environment in buildings such as offices. [Explanation of symbols]

[0081] 18 Control Unit (Computer) 19 Display section 21 Input operation section 25 Structural information input section 26 Sound source settings section 28 Measurement point input section 29 Sound environment calculation section 31 Output control section 33 Storage section 35 Pre-change structural information 36 Structural Change Information 38 Sound source position 39 measurement points 41 Sound environment information before change 42 Sound environment information after change

Claims

1. A sound environment improvement evaluation method for evaluating the improvement of a sound environment in an indoor space due to a structural change, comprising: inputting pre-modification structural information indicating at least the shape of the interior space and the partition wall configuration before the structural modification into a computer; a step of setting a virtual sound source inside the indoor space and inputting the virtual sound source into the computer; a step of causing the computer to output pre-change sound environment information indicating the sound environment in the indoor space before the structural change is performed, based on the pre-change structural information and the virtual sound source; inputting structural modification information specifying the content of the structural modification into the computer; and outputting, based on the structural modification information and the virtual sound source, post-modification sound environment information indicating the sound environment in the indoor space after the structural modification is performed, from the computer; the pre-change sound environment information and the post-change sound environment information are output in an auditory manner, A method for evaluating sound environment improvement, wherein the structural modification includes extending a partition wall to a slab.

2. further comprising a step of setting measurement points within the indoor space and inputting the measurement points into the computer; The sound environment improvement evaluation method according to claim 1 , wherein the pre-change sound environment information and the post-change sound environment information include an expected sound that is expected to be heard at the measurement point when a pseudo sound is generated from the virtual sound source.

3. setting measurement points within the indoor space and inputting the measurement points into the computer; and further comprising a step of setting a background noise level at the measurement point and inputting the background noise level to the computer. The sound environment improvement evaluation method according to claim 1 , wherein the pre-change sound environment information and the post-change sound environment information include a sound environment in which the set background noise level is taken into consideration.

4. A plurality of the measurement points can be set, an output image showing the indoor space and positions in the indoor space corresponding to the measurement points is displayed; The output image can accept a selection operation of the measurement point, The sound environment improvement evaluation method according to claim 2 , wherein the pre-change sound environment information and the post-change sound environment information are the predicted sound at the measurement point selected in the output image.

5. further comprising a step of setting measurement points within the indoor space and inputting the measurement points into the computer; The sound environment improvement evaluation method according to claim 1 , wherein the pre-change sound environment information and the post-change sound environment information correspond to sound pressure levels at the measurement points when sounds are generated from the virtual sound source.

6. further comprising a step of setting measurement points within the indoor space and inputting the measurement points into the computer; The sound environment improvement evaluation method according to claim 1 , wherein the pre-change sound environment information and the post-change sound environment information include a reverberation time of the sound at the measurement point when the sound is generated from the virtual sound source.

7. A plurality of pieces of structural modification information can be input, The sound environment improvement evaluation method according to claim 1 , wherein the post-change sound environment information is output in association with the inputted structural change information for each of the structural change information.

8. The sound environment improvement evaluation method according to claim 1, wherein the pre-change sound environment information and the post-change sound environment information are output in a manner that allows comparison.

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