JP2012188904A - Partition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a sound leakage to the outside from a partition booth, and simultaneously solve such a problem that the sound is appropriately absorbed in the partition booth.SOLUTION: The partition 10 is erected on a floor face. The partition 10 comprises a first region 110 and a second region 120 that is positioned at a lower part than the first region 110 when the partition 10 is erected on the floor face. The second region 120 has a higher sound absorption rate than that of the first region 110.

Description

  The present invention relates to a partition structure.

  FIG. 7 is a diagram illustrating an example of a propagation path of reflected sound with respect to a conventional partition structure. In the room 700 shown in FIG. 7, a partition 702A, a partition 702B, and a partition 702C are installed. Accordingly, a space 712, a space 714, a space 716, and a space 718 are formed in the room 700. For example, the surfaces of these partitions are covered with a flat plate member such as a steel plate or an aluminum plate. For this reason, as indicated by the propagation path 732, the sound emitted from the person 722 in the space 714 and directed to the lower side of the partition 702 B is reflected by the lower side of the partition 702 B, the ceiling, and the wall surface of the room 700, and the person 724 in the space 712. Will propagate up to. Further, as indicated by the propagation path 734, the sound emitted from the person 722 and directed to the ceiling is reflected below the ceiling and the partition 702 </ b> C and propagates to the person 726 in the space 716. Further, as indicated by the propagation path 736, the sound emitted from the person 722 and directed to the floor is reflected below the floor, the ceiling, and the partition 702C and propagates to the person 726. From the same principle, the sound emitted from the person 724 propagates to the person 722 and the person 726, and the sound emitted from the person 726 propagates to the person 722 and the person 724. In this way, sound emitted from any one of the space 712, the space 714, the space 716, and the space 718 is reflected at least by the ceiling facing the entire space where the partitions are installed (the spaces 712 to 718). And propagates to another space.

  Patent Document 1 describes that a sound absorbing mechanism having a diaphragm is provided at the edge of a partition body for the purpose of removing diffracted sound that wraps around the partition body. Patent Document 2 describes that a sound absorbing material layer is provided in a partition for the purpose of absorbing noise.

JP-A-62-266012 JP 63-073600

However, with the technique described in Patent Document 1, it is not possible to prevent sound from reflecting off the ceiling and leaking outside. Further, in the technique described in Patent Document 2, since the sound absorbing material layer is provided over the entire screen, the sound is excessively absorbed, and a strange feeling as if in an anechoic room is felt in the partition booth. Problems such as making the user feel. As described above, the conventional technology cannot simultaneously solve the problem of suppressing sound from being reflected off the ceiling and leaking outside and the problem of not excessively absorbing sound in the partition booth.
Therefore, the present invention provides a partition structure that can simultaneously solve the problem of reducing the sound leaking outside the partition booth and the problem of not absorbing excessive sound in the partition booth. Objective.

  In order to solve the above problems, the present invention includes a partition standing on a floor surface, the partition having a first region and a sound absorption coefficient higher than that of the first region, and the partition is a floor. And a second region provided at a position closer to the floor surface than the first region when standing on a surface. The second region is a region on a propagation path of sound that is emitted from a first space sandwiched between the partitions and propagates to a second space other than the first space, and the propagation path is It may be a propagation path including a ceiling facing the space where the partition is erected as a reflection surface. The second region is a region on a propagation path of a sound that is emitted from a second space other than the first space sandwiched between the partitions and propagates to the first space, and the propagation path May be a propagation path including a ceiling facing the space where the partition is erected as a reflecting surface. The sound absorbing means has a higher sound absorption rate than the wall surface of the space adjacent to the space sandwiched between the partitions, provided on the wall surface at the same height as the second region of the partition. You may make it further provide a sound-absorbing means.

  According to the present invention, it is possible to simultaneously solve the problem of reducing the sound leaking outside the partition booth and the problem of appropriately absorbing sound in the partition booth.

The external appearance of the partition 10 which concerns on embodiment is shown. A cross section of the partition 10 is shown. An installation example of a partition structure is shown. An installation example of a partition structure is shown. The simulation result of the sound reduction performance of the partition booth is shown. The other structural example of a partition structure is shown. Another installation example of the partition structure is shown. Another installation example of the partition structure is shown. The result of the acoustic simulation with respect to the conventional partition structure is shown. It is a figure explaining each area | region in a modification. (a) is a perspective view which shows the example of the panel which concerns on the modification 1. FIG. (b) is sectional drawing of the panel shown to (a). It is a figure explaining the propagation path | route of the conversation audio | voice and masking sound in the modification 1. FIG. (a) is a perspective view which shows the example of the panel which concerns on the modification 2. FIG. (b) is sectional drawing of the panel shown to (a). It is a figure explaining the propagation path | route of the conversation audio | voice and masking sound in the modification 2. FIG. It is sectional drawing which shows the example of the panel which concerns on the modification 3. (a) is sectional drawing which shows the example of the panel which concerns on the modification 4. FIG. (b) is sectional drawing of the panel shown to (a). (a) is sectional drawing which shows the example of the panel which concerns on the modification 5. FIG. (b) is a side view showing an example of a panel according to Modification 6. It is a perspective view which shows the example of the panel which concerns on the modification 7. FIG. It is sectional drawing which shows the example of the panel which concerns on the modification 8. It is sectional drawing which shows the example of the panel which concerns on the modification 9. (a)-(c) is sectional drawing which shows the example of the panel which concerns on the modification 10. As shown in FIG. It is a block diagram which shows the structure of the sound emission control apparatus which concerns on the modification 11, and a speaker. It is a figure explaining the example of installation of the speaker of the modification 12. FIG. It is the top view and longitudinal cross-sectional view of the partition 10 of the modification 12.

FIG. 1 shows an appearance of a partition 10 according to the embodiment. The partition 10 includes a flat main body 100. The partition 10 includes a main body 100 and legs 130. The main body 100 has an upper surface 140 that is an upper surface, an end surface 150 that is an end surface, and a side surface 160 that is a side surface. There are two end surfaces 150, and each side of the upper surface 140 in the short direction is shared with the upper surface 140. Similarly, there are two side surfaces 160, and each side in the longitudinal direction of the upper surface 140 is shared with the upper surface 140. The side surface 160 has a first region 110 and a second region 120. The leg part 130 supports the main body part 100 in a state of being erected on the floor surface (a state of being erected). The partition 10 is erected on the floor to divide the space into a plurality of spaces (sections). The second area 120 is located below the first area 110 and closer to the floor surface when the partition 10 is erected on the floor surface. The second region 120 has a higher sound absorption rate than the first region 110. When the first region 110 is configured by a plurality of regions having different sound absorption rates, the average value of the sound absorption rates of the plurality of regions may be used as the sound absorption rate of the first region 110. Similarly, when the second region 120 is configured by a plurality of regions having different sound absorption rates, the average value of the sound absorption rates of the plurality of regions may be used as the sound absorption rate of the second region 120. The second region 120 preferably has a higher sound absorption rate than the first region 110 at least in the sound band (250-500 Hz). The leg part 130 has a range in the height direction necessary to support and stand the main body part 100 from the floor surface to a position of, for example, 6 cm. The second region 120 has, for example, a range in the height direction from a position 6 cm from the floor surface to a position 30 cm from the floor surface. The first region 110 has, for example, a range in the height direction from a position 30 cm from the floor surface to a position 180 cm from the floor surface.
In the present embodiment, the sound absorption coefficient of the leg portion 130 is lower than that of the second area 120. In this case, the area having the highest sound absorption coefficient in the partition 10 (that is, the second area 120) is closest to the floor surface. It can be said that it is located. If the sound absorption coefficient of the leg portion 130 is the same as that of the second region 120, the leg portion 130 functions as the second region 120. In this case as well, the highest sound absorption coefficient in the partition 10 is obtained. The region (second region) having a point is provided at a position closest to the floor surface. Even if the sound absorption rate of the leg portion 130 is higher than that of the second region 120, the leg portion 130 corresponds to a region having a higher sound absorption rate than the first region 110, that is, the second region 120. Will do. Therefore, also in this case, the region (second region) having the highest sound absorption rate in the partition 10 is provided at a position closest to the floor surface.
The sizes of the first region 110 and the second region 120 are not limited to the above example, and the position of the boundary between the first region 110 and the second region 120 is determined by the partition 10. It is determined according to the acoustic characteristics required for the partitioned space.

  FIG. 2 shows a cross section of the partition 10. The first region 110 has a flat core material 114. Further, the first region 110 has a flat surface member 112. The core material 114 is sandwiched between the pair of surface members 112. The second region 120 has a sound absorbing material 124. Further, the second region 120 has a flat surface member 122. The sound absorbing material 124 is filled in a space between the pair of surface members 122. The surface member 112 has at least higher reflectivity than the surface member 122 with respect to the sound emitted to the surface member 112. That is, the surface member 122 has at least higher permeability than the surface member 112 with respect to the sound emitted toward the surface member 122. In the example shown in FIG. 2, the surface member 112 is a steel plate, more specifically, a punching metal having a plurality of openings formed in the steel plate. The sound absorbing material 124 absorbs sound transmitted through the surface member 122. In the example shown in FIG. 2, glass wool is used for the sound absorbing material 124. The surface member 122 only needs to have at least higher permeability than the surface member 112 with respect to the sound emitted from the surface member 112, and is not limited to punching metal. For example, the surface member 122 may be a mesh material, a perforated gypsum board, or the like. Further, the surface member 122 may be formed with an opening and transmitting sound from the opening. Further, the surface member 122 may be a member that transmits sound through the material itself. The sound absorbing material 124 only needs to absorb sound transmitted through the surface member 122 and is not limited to glass wool. For example, the sound absorbing material 124 may be a porous sound absorbing material such as felt, urethane, sponge, foam, or a fibrous sound absorbing material. When the sound absorbing material 124 is built in the partition 10 as shown in FIG. 2, for example, the surface of the partition 10 becomes flat overall as compared with the structure of FIG. In FIG. 2, the internal structure of the second region 120 is only the surface member 122 and the sound absorbing material 124, but if it is desired to further improve the sound insulation between the adjacent space partitioned by the partition 10, A sound insulation member that extends in the vertical direction and has sound insulation properties, such as a steel plate (about 1.6 mm), may be provided in the central portion of the sound absorbing material 124.

  FIG. 3A and FIG. 3B show examples of installation of the partition structure. 3A and 3B, a partition 10A, a partition 10B, and a partition 10C are installed in the room 20 as a partition structure. In the following description, these partitions 10 are collectively referred to as “each partition 10”. The partitions 10 are erected side by side on the floor surface 22 of the room 20. Thus, a partition booth 30 that is a space between the partition 10A and the partition 10B is formed in the room 20. In the room 20, a partition booth 32, which is a space between the partition 10B and the partition 10C, is formed. In the room 20, a space 40 that is sandwiched between the partition 10 </ b> A and the wall surface 26 facing the partition 10 </ b> A and adjacent to the partition booth 30 is formed. In the room 20, a space 42 that is sandwiched between the partition 10 </ b> C and the wall surface 28 facing the partition 10 </ b> C and adjacent to the partition booth 32 is formed. The height from the floor surface 22 to the ceiling 24 is higher than the height of each partition 10. For this reason, a gap is formed between each partition 10 and the ceiling 24 which can be a sound leakage path to an adjacent space.

  The partition booth 30 uses the partition 10 </ b> A in which a sound absorbing material is provided in the second region 120 as a partition wall with the adjacent space 40. For this reason, as indicated by the solid line arrow S1 in FIG. 3A, the sound uttered in the partition booth 30 and directed to the second area 120 of the partition 10A is provided in the second area 120 of the partition 10A. The sound absorbing material 124 absorbs sound. Thus, since the sound toward the second region 120 of the partition 10A can be absorbed by the sound absorbing material 124, the sound is reflected by the partition 10A, the floor surface 22 and the ceiling 24, and the upper end of the partition 10B. Leakage to the adjacent partition booth 32 from the gap with the ceiling 24 (dotted arrow S1 ′) can be suppressed. Furthermore, the partition booth 32 has the same configuration as the partition booth 30. For this reason, as indicated by the solid arrow S2, the sound emitted in the partition booth 32 and directed to the second area 120 of the partition 10C is absorbed by the sound absorbing material 124 provided in the second area 120 of the partition 10C. The That is, the sound emitted in the partition booth 32 and directed to the second area 120 of the partition 10C is reflected by the partition 10C, the floor surface 22, and the ceiling 24, and from the gap between the upper end of the partition 10B and the ceiling 24, Leakage to the adjacent partition booth 30 (dotted arrow S2 ′) can be suppressed.

The partition booth 30 uses a partition 10B in which a sound absorbing material is provided in the second region 120 as a partition wall with the adjacent partition booth 32. As shown by the solid arrow S3 in FIG. 3A, the sound emitted in the partition booth 30 and directed to the second area 120 of the partition 10B is sound-absorbing material 124 provided in the second area 120 of the partition 10B. Sound is absorbed. Thus, since the sound toward the second region 120 of the partition 10B can be absorbed by the sound absorbing material 124, the sound is reflected by the partition 10B, the floor surface 22, and the ceiling 24, and the upper end of the partition 10A. Leakage into the adjacent space 40 from the gap with the ceiling 24 (dotted arrow S3 ′) can be suppressed. Furthermore, the partition booth 32 has the same configuration as the partition booth 30. For this reason, as indicated by the solid arrow S4, the sound emitted in the partition booth 32 and directed to the second area 120 of the partition 10B is absorbed by the sound absorbing material 124 provided in the second area 120 of the partition 10B. The That is, the sound emitted in the partition booth 32 and directed to the second area 120 of the partition 10B is reflected by the partition 10B, the floor surface 22, and the ceiling 24, and from the gap between the upper end of the partition 10C and the ceiling 24, Leakage into the adjacent space 42 (dotted arrow S4 ′) can be suppressed.
As shown in FIG. 3A, the second region 120 is emitted from a space (first space) sandwiched between the partitions, and into a space (second space) other than the first space. This is an area on the propagation path of the voice to be propagated. The sound propagation path referred to here is a propagation path including at least the ceiling facing the space of the room 20 where the partition is erected as a reflection surface.

Further, the sound emitted from the partition booth 30 and directed to the ceiling 24 is reflected by the ceiling 24 and leaks into the adjacent partition booth 32. Then, the sound leaked into the partition booth 32 enters the second area 120 of the partition 10C facing the partition booth 30. A sound absorbing material 124 is provided in the second region 120 of the partition 10C. Therefore, as shown by the solid arrow S5 in FIG. 3B, the sound emitted from the partition booth 30, reflected by the ceiling 24, and leaked into the partition booth 32 is provided in the second region 120 of the partition 10C. The sound absorbing material 124 is absorbed. Since the sound emitted in the partition booth 30 and reflected by the ceiling 24 and leaked to the adjacent partition booth 32 can be absorbed by the sound absorbing material 124 of the partition 10C, the sound is absorbed in the partition booth 32. (Dotted line arrow S5 ') can be suppressed. Further, the partition booth 30 has the same configuration as the partition booth 32. For this reason, the sound emitted from the partition booth 32, reflected by the ceiling 24, and leaked to the adjacent partition booth 30 is absorbed by the sound absorbing material 124 of the partition 10A as indicated by the solid line arrow S6 in FIG. can do. Therefore, it is possible to suppress the voice from being heard by a person in the partition booth 30 (dotted line arrow S6 ′).
As shown in FIG. 3B, the second region 120 is emitted from a space (second space) other than the space (first space) sandwiched between the partitions 10, and the first space. This is an area on the propagation path of the sound propagating to The sound propagation path referred to here is a propagation path including at least a ceiling facing the space of the room 20 where each partition is erected as a reflection surface.

  No sound absorbing means such as a sound absorbing material 124 is provided in each of the first regions 110 of the partition 10A and the partition 10B forming the partition booth 30. For example, the sound traveling toward the first region 110 of the partition 10B is incident on the surface of the first region 110 at an angle closer to the perpendicular than the sound traveling toward the second region 120 of the partition 10B. For this reason, most of the sound emitted toward the first area 110 of the partition 10 </ b> B echoes in the partition booth 30. Therefore, it is possible to ensure an appropriate sound sound in the partition booth 30. In addition, the sound that goes upward of the first area 110 of the partition 10B becomes sound that leaks in a substantially horizontal direction from the gap between the upper end of the partition 10A and the ceiling 24, but the diffraction effect of the partition 10A (so-called sound insulation effect of soot) ), The leakage into the adjacent space is small. As described above, according to the partition structure shown in FIGS. 3A and 3B, the component related to the leakage to the adjacent space among the sounds uttered in the partition booth 30 is the second region. While the sound is absorbed at 120, components not related to leakage do not absorb much sound in the first region 110, so that the user does not feel uncomfortable as if they are in an anechoic room. In addition, among the sounds uttered in the partition booth 30, components that echo toward the ceiling and easily leak into the adjacent space are absorbed by the sound absorbing means called the second region 120. It can absorb sound moderately. Similarly, sound absorbing means such as the sound absorbing material 124 is not provided in each of the first regions 110 of the partition 10B and the partition 10C forming the partition booth 32. Therefore, according to the partition structure shown in FIGS. 3 (a) and 3 (b), the sound in the partition booth 32 is moderated so as not to give the user a sense of incongruity as if in an anechoic room. Can absorb sound.

  FIG. 4 shows a simulation result of the sound reduction performance of the partition booth. The graph 400 shows the volume reduction by the partition booth for each frequency. In the graph 400, a round plot shows sound reduction performance in a partition booth using a conventional partition, that is, a partition in which no sound absorbing material is provided in the second region. The triangular plot shows the sound reduction performance in the partition booth using the partition 10 of the present embodiment. In the graph 400, the leftmost rounded plot and triangular plot represent the volume reduction of the A characteristic sound pressure level when viewed in the entire band, not for each frequency.

  For example, for a sound of 250 Hz which is a voice band, the partition booth using the partition 10 can reduce the sound by about 1.5 dB more than the partition booth using the conventional partition. In addition, for a sound of 500 Hz that is a voice band, the partition booth using the partition 10 can reduce the sound by about 3 dB more than the partition booth using the conventional partition. As for the A-weighted sound pressure level seen in the entire band, the partition booth using the partition 10 can reduce the sound by about 2 dB more than the partition booth using the conventional partition.

  FIG. 5 shows another configuration example of the partition structure. The partition structure shown in FIG. 5 includes a partition 50 and first sound absorbing means 60. The partition 50 is erected on the floor surface. The partition 50 includes a flat plate-like main body 500 and legs 530. The leg portion 530 supports the main body portion 500 in a standing state. The partition 50 is erected to divide the space into a plurality of spaces. The main body 500 includes a flat surface member 502 and a core member 504 whose both surfaces are covered with the surface member 502. In the example shown in FIG. 5, a steel plate is used for the surface member 502.

  The first sound absorbing means 60 is provided on both surfaces of the region to be the second region 520 of the main body 500. As a result, the first region 510 and the second region 520 are formed in the main body 500. The second area 520 is located below the first area 510, that is, near the floor surface when the partition 50 is erected. The second region 520 has a higher sound absorption rate than the first region 510 due to the provision of the first sound absorbing means 60.

  If the 1st sound absorption means 60 raises the sound absorption rate of the 2nd area | region 520 rather than the 1st area | region 510, the shape and a structure will not be ask | required. For example, the first sound absorbing means 60 includes a sound absorbing material such as felt, glass wool, and foaming agent. The first sound absorbing means 60 may have a surface member that covers the surface of the sound absorbing material. For example, the first sound absorbing means 60 may be composed of glass wool and punching metal that covers the surface of the glass wool. If the 1st sound absorption means 60 functions as the 2nd area | region 520, the installation method is not ask | required. For example, the first sound absorbing means 60 may be affixed to the surface of the main body 500 as shown in FIG. Further, the first sound absorbing means 60 may be erected on the floor so as to cover the surface of the main body 500. Further, the first sound absorbing means 60 may not be in close contact with the surface of the main body 500.

  6A and 6B show another installation example of the partition structure. 6A and 6B, a partition 50A, a partition 50B, and a partition 50C are installed in the room 20 as a partition structure. In the following description, these partitions 50 are collectively referred to as “each partition 50”. The partitions 50 are erected side by side on the floor surface 22 of the room 20. Thus, a partition booth 80 that is a space between the partition 50A and the partition 50B is formed in the room 20. In the room 20, a partition booth 82, which is a space between the partition 50B and the partition 50C, is formed. In the room 20, a space 90 that is sandwiched between the partition 50 </ b> A and the wall surface 26 facing the partition 50 </ b> A and adjacent to the partition booth 80 is formed. In the room 20, a space 92 that is sandwiched between the partition 50 </ b> C and the wall surface 28 facing the partition 50 </ b> C and adjacent to the partition booth 82 is formed. The height from the floor surface 22 to the ceiling 24 is higher than the height of each partition 50. For this reason, a gap is formed between each partition 50 and the ceiling 24 that can be a sound leakage path to an adjacent space.

  60 A of 1st sound absorption means are provided in the surface by the side of the partition booth 80 of the 2nd area | region 520 of the partition 50A, ie, the 2nd area | region 520 of the one side surface of the partition booth 80. As shown in FIG. Specifically, the first sound absorbing means 60A emits the propagation path on the propagation path of the sound emitted from the partition booth 80, reflected by the partition 50A and the ceiling 24, and leaked to the adjacent partition booth 82. It is provided with a shape and size so as to block. Further, the first sound absorbing means 60 </ b> A emits in the adjacent partition booth 82, reflects off the ceiling 24 and the partition 50 </ b> A, and blocks the propagation path on the sound propagation path leaking to the partition booth 80. Are provided with various shapes and sizes.

  A first sound absorbing means 60B is provided on the surface of the second area 520 of the partition 50B on the partition booth 80 side, that is, the second area 520 on the other side of the partition booth 80. Specifically, the first sound absorbing means 60B cuts off the propagation path on the propagation path of the sound emitted in the partition booth 80, reflected by the partition 50B and the ceiling 24, and leaking into the adjacent space 90. It is provided with such a shape and size. Further, the first sound absorbing means 60B is shaped so as to cut off the propagation path on the sound propagation path that is emitted from the adjacent space 90, reflected by the ceiling 24 and the partition 50B, and leaks to the partition booth 80. And is provided with a size.

  The first sound absorbing means 60C is provided on the surface of the second area 520 of the partition 50B on the partition booth 82 side, that is, the second area 520 on one side of the partition booth 82. Specifically, the first sound absorbing means 60C cuts off the propagation path on the sound propagation path emitted from the partition booth 82, reflected by the partition 50B and the ceiling 24, and leaking into the adjacent space 92. It is provided with such a shape and size. Further, the first sound absorbing means 60C is shaped so as to cut off the propagation path on the sound propagation path that is emitted from the adjacent space 92 and reflected by the ceiling 24 and the partition 50B and leaks to the partition booth 82. And is provided with a size.

  The first sound absorbing means 60D is provided on the surface of the second area 520 of the partition 50C on the partition booth 82 side, that is, the second area 520 on the other side of the partition booth 82. Specifically, the first sound absorbing means 60D emits the propagation path on the propagation path of the sound emitted from the partition booth 82, reflected by the partition 50C and the ceiling 24, and leaking to the adjacent partition booth 80. It is provided with a shape and size so as to block. Further, the first sound absorbing means 60 </ b> C emits in the adjacent partition booth 80, reflects off the ceiling 24 and the partition 50 </ b> C, and blocks the propagation path on the sound propagation path leaking to the partition booth 82. Are provided with various shapes and sizes.

  Further, on the wall surface 26 of the space 90, second sound absorbing means 70 </ b> A is provided at the same height as the second region 520 of the partition 50. Thus, the first region 510 and the second region 520 are formed on the wall surface 26 in the same manner as the partition 50. The second area 520 is located below the first area 510, that is, near the floor surface 22. The second region 520 has a higher sound absorption rate than the first region 510 due to the provision of the second sound absorbing means 70A. Specifically, the second sound absorbing means 70A blocks the propagation path on the sound propagation path that is emitted from the space 90, is reflected by the wall surface 26 and the ceiling 24, and leaks to the adjacent partition booth 80. It is provided with such a shape and size. Further, the second sound absorbing means 70 </ b> A emits in the adjacent partition booth 80, is reflected by the ceiling 24 and the wall surface 26, and blocks the propagation path on the sound propagation path leaking into the space 90. It has a shape and a size.

  Further, on the wall surface 28 of the space 92, the second sound absorbing means 70 </ b> B is provided at the same height as the second region 520 of the partition 50. As a result, the first region 510 and the second region 520 are formed on the wall surface 28 in the same manner as the partition 50. The second area 520 is located below the first area 510, that is, near the floor surface 22. The second region 520 has a higher sound absorption rate than the first region 510 due to the provision of the second sound absorbing means 70B. Specifically, the second sound absorbing means 70B blocks the propagation path on the sound propagation path emitted from the space 92, reflected by the wall surface 28 and the ceiling 24, and leaking to the adjacent partition booth 82. It is provided with such a shape and size. Further, the second sound absorbing means 70 </ b> B emits in the adjacent partition booth 82, reflects off the ceiling 24 and the wall surface 28, and blocks the propagation path on the sound propagation path leaking into the space 92. It has a shape and a size.

  The shape and configuration of the second sound absorbing means 70 are not limited as long as the sound absorption rate of the second region 520 is higher than that of the first region 510. For example, the second sound absorbing means 70 includes a sound absorbing material such as felt, glass wool, and foaming agent. The second sound absorbing means 70 may have a surface member that covers the surface of the sound absorbing material. For example, the second sound absorbing means 70 may be composed of glass wool and punching metal that covers the surface of the glass wool. As long as the second sound absorbing means 70 can be provided on the wall surface 26 and the wall surface 28 at the same height as the second region 520 of the partition 50, the installation method is not limited. For example, the second sound absorbing means 70 may be affixed to the wall surface 26 and the wall surface 28. Further, the second sound absorbing means 70 may be erected on the floor surface so as to cover the surfaces of the wall surface 26 and the wall surface 28. Further, the second sound absorbing means 70 may not be in close contact with the wall surface 26 and the wall surface 28.

  The partition booth 80 uses the partition 50 </ b> A as a partition wall with the adjacent space 90. In the partition 50A, the first sound absorbing means 60A is provided on the surface of the second area 520 on the partition booth 80 side. As shown by the solid line arrow S7 in FIG. 6A, the sound uttered in the partition booth 80 and directed to the second area 520 of the partition 50A is the side face on the partition booth 80 side of the second area 520 of the partition 50A. The sound is absorbed by the first sound-absorbing means 60A. Thus, since the sound toward the second region 520 of the partition 50A can be absorbed by the first sound absorbing means 60A, the sound is reflected by the partition 50A, the floor surface 22, and the ceiling 24, and the sound of the partition 50B. Leakage into the partition booth 82 from the gap between the upper end and the ceiling 24 (dotted arrow S7 ′) can be suppressed. The partition booth 82 has the same configuration as the partition booth 80. For this reason, as indicated by the solid arrow S8, the sound emitted in the partition booth 82 and directed to the second area 520 of the partition 50C is provided on the side of the partition 50C in the second area 520 on the partition booth 82 side. The sound is absorbed by the first sound absorbing means 60D. That is, the sound emitted in the partition booth 82 and directed to the second region 520 of the partition 50C is reflected by the partition 50C, the floor surface 22, and the ceiling 24, and from the gap between the upper end of the partition 50B and the ceiling 24, Leakage to the adjacent partition booth 80 (dotted arrow S8 ′) can be suppressed.

  The partition booth 80 uses the partition 50B as a partition wall with the adjacent partition booth 82. A first sound absorbing means 60B is provided on the side surface of the second area 520 of the partition 50B on the partition booth 80 side. As shown by the solid line arrow S9 in FIG. 6A, the sound emitted in the partition booth 80 and directed to the second area 520 of the partition 50B is the first sound provided in the second area 520 of the partition 50B. Sound is absorbed by the sound absorbing means 60B. Thus, since the sound which goes to the 2nd area | region 520 of the partition 50B within the partition booth 80 can be absorbed by the 1st sound absorption means 60, the said sound is reflected by the partition 50B, the floor surface 22, and the ceiling 24. Thus, leakage from the gap between the upper end portion of the partition 50A and the ceiling 24 into the space 90 (dotted arrow S9 ′) can be suppressed. The partition booth 82 has the same configuration as the partition booth 80. For this reason, as shown by the solid arrow S10, the sound emitted in the partition booth 82 and directed to the second area 520 of the partition 50B is provided on the surface of the second area 520 of the partition 50B on the partition booth 82 side. The sound is absorbed by the first sound absorbing means 60C. That is, the sound emitted in the partition booth 82 and directed to the second area 520 of the partition 50B is reflected by the partition 50B, the floor surface 22, and the ceiling 24, and from the gap between the upper end of the partition 50C and the ceiling 24, Leakage into the adjacent space 92 (dotted arrow S10 ′) can be suppressed.

  Further, the sound emitted from the partition booth 80 and directed to the ceiling 24 is reflected by the ceiling 24 and leaks into the adjacent partition booth 82. Then, the sound leaked into the partition booth 82 enters the second region 520 of the partition 50C facing the partition booth 80. A first sound absorbing means 60D is provided on a side surface of the second region 520 of the partition 50C. Therefore, as indicated by a solid arrow S11 in FIG. 6B, the sound emitted in the partition booth 80, reflected by the ceiling 24, and leaked into the partition booth 82 is stored in the second area 520 of the partition 50C. The sound is absorbed by the first sound absorbing means 60D provided on the side surface. Therefore, it is possible to suppress the voice leaked to the partition booth 82 in the partition booth 80 from being heard by a person in the partition booth 82 (dotted arrow S11 '). The partition booth 80 has the same configuration as the partition booth 82. For this reason, as indicated by the solid arrow S12, the sound emitted in the partition booth 82 and directed to the second area 520 of the partition 60A is provided on the surface of the second area 520 of the partition 60A on the partition booth 80 side. The sound is absorbed by the first sound absorbing means 60A. In other words, it is possible to suppress the voice uttered in the partition booth 82 and leaked to the partition booth 80 from being heard by the user in the partition booth 80 (dotted line arrow S12 ').

  The sound emitted from the partition booth 80 and directed to the ceiling 24 is reflected by the ceiling 24 and leaks into the adjacent space 90. Then, the sound leaked into the space 90 enters the second region 520 of the wall surface 26 facing the partition booth 80. In the second region 520 of the wall surface 26, second sound absorbing means 70A is provided. Therefore, as indicated by a solid arrow S13 in FIG. 6B, the sound emitted in the partition booth 80, reflected by the ceiling 24, and leaked into the space 90 is provided in the second region 520 of the wall surface 26. The sound is absorbed by the second sound absorbing means 70A. That is, it is possible to suppress the voice leaked into the space 90 in the partition booth 80 from being heard by a person in the space 90 (dotted line arrow S13 '). The space 92 has the same configuration as the space 90. For this reason, as indicated by the solid arrow S14, the sound emitted in the partition booth 82, reflected by the ceiling 24, and leaked into the space 92 is the second sound provided in the second region 520 of the wall surface 28. The sound absorbing means 70B absorbs the sound. Therefore, it is possible to suppress the voice that is emitted in the partition booth 82 and leaked into the space 92 from being heard by the user in the space 92 (dotted arrow S14 ').

  The first region 510 of each of the partition 50A and the partition 50B forming the partition booth 80 is not provided with sound absorbing means such as the first sound absorbing means 60A to 60D. For example, the sound toward the first region 510 of the partition 50B is incident on the surface of the first region 510 at an angle closer to the vertical than the sound toward the second region 520 of the partition 50B. For this reason, most of the sound directed to the first area 510 of the partition 50B echoes in the partition booth 80. Therefore, it is possible to ensure an appropriate sound of the sound in the partition booth 80. In addition, the sound that goes upward of the first area 510 of the partition 50B becomes sound that leaks in a substantially horizontal direction from the gap between the upper end of the partition 50A and the ceiling 24, but is attenuated by the diffraction effect of the partition 50A, so There is little leakage to the space. As described above, according to the partition structure shown in FIGS. 6A and 6B, only the component related to the leakage to the adjacent space among the sounds uttered in the partition booth 80 is the second. While the sound is absorbed in the area 520, components not related to leakage do not absorb much sound in the first area 510, so that the user does not feel uncomfortable as if they are in an anechoic chamber. Similarly, sound absorbing means such as the first sound absorbing means 60A to 60D are not provided in the first regions 510 of the partition 50B and the partition 50C forming the partition booth 82, respectively. Therefore, according to the partition structure shown in FIGS. 6 (a) and 6 (b), the user does not feel uncomfortable as if they are in an anechoic room or the sound is not blurred. The sound in the partition booth 82 can be appropriately absorbed.

  Similarly, the first region 510 of the wall surface 26 that forms the space 90 is not provided with sound absorbing means such as the second sound absorbing means 70A. Therefore, according to the partition structure shown in FIGS. 6 (a) and 6 (b), the sound in the space 90 is not given to the user so that the user feels uncomfortable as if they were in an anechoic room. It can absorb sound moderately. Similarly, the first region 510 of the wall surface 28 that forms the space 92 is not provided with sound absorbing means such as the second sound absorbing means 70B. For this reason, according to the partition structure shown in FIGS. 6A and 6B, the sound in the space 92 is not given to the user so that the user feels uncomfortable as if they were in an anechoic room. It can absorb sound moderately.

  The partition structure may further include second sound absorbing means 70A and 70B in addition to the partition structure shown in FIGS. 3 (a) and 3 (b). Further, the partition structure may be a configuration in which the partition 10 and the partition 50 are mixed. The partition structure shown in FIGS. 6A and 6B includes both the first sound absorbing means 60 and the second sound absorbing means 70, but is not limited thereto. For example, the partition structure may be configured to include one of the first sound absorbing means 60 and the second sound absorbing means 70. The first sound absorbing means 60 is not limited to the partition 50. For example, the first sound absorbing means 60 leaks from the adjacent room on the propagation path of the sound reflected on the floor 24 or the ceiling 24 and leaked to the adjacent room or reflected on the ceiling 24. It may be provided on a voice propagation path. Further, the second sound absorbing means 70 is not limited to the wall surface 26 and the wall surface 28, but is reflected on the floor 22 or the ceiling 24 on the propagation path of the sound reflected by the ceiling 24 and leaking to the adjacent room, or by the ceiling 24. It may be provided on the propagation path of the sound leaked from the adjacent room.

  The first sound absorbing means 60 satisfies a condition for attenuating at least sound that is reflected by the ceiling 24 and leaks from the space to the adjacent room space or sound that is reflected by the ceiling 24 and leaks from the adjacent room space to the space. I just need it. This condition includes contents to be satisfied by the position and acoustic characteristics of the first sound absorbing means 60. Therefore, the 1st sound absorption means 60 is not restricted to the structure which absorbs the said sound, The structure which scatters the said sound may be sufficient. The second sound absorbing means 70 satisfies the condition for attenuating at least the sound reflected by the ceiling 24 and leaking from the space to the adjacent room space or the sound reflected by the ceiling 24 and leaking from the adjacent room space to the space. I just need it. This condition includes contents to be satisfied by the position and acoustic characteristics of the second sound absorbing means 70. Therefore, the second sound absorbing means 70 is not limited to the structure that absorbs the sound, but may be configured to scatter the sound.

  The sound propagation path reflected from the ceiling 24 and leaking to the next room, and the sound propagation path reflected from the ceiling 24 and leaked from the next room are the partition placement position, partition shape, partition size, space shape, It varies depending on the installation conditions of the partition structure, such as the size of the space, the presence or absence of obstacles, the material of the ceiling 24, the material of the floor surface 22, the material of the wall surfaces 26 and 28. For this reason, according to the installation conditions of the partition structure, at least one of the configuration, material, shape, size, and position of the second region 120 in the partition 10 may be varied. Further, at least one of the configuration, material, shape, size, and position of the first sound absorbing means 60 may be varied according to the installation conditions of the partition structure. Further, at least one of the configuration, material, shape, size, and position of the second sound absorbing means 70 may be varied according to the installation conditions of the partition structure.

As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above, It can implement with another various form. For example, the above-described embodiment may be modified as follows.
(Modification 1)
(Modification 1-1)
A configuration in which the voice is masked so that the conversation voice does not leak outside the booth through the ceiling surface may be provided in a partition in contact with the space 42 outside the booth. Hereinafter, the configuration of the partition 10D provided with a configuration for masking voice in the partition 10C of FIG. 2 will be described as an example.
FIG. 8 is a diagram for explaining each region. FIG. 9A shows a perspective view of the partition 10D, and FIG. 9B shows the partition 10D in FIG. A cross-sectional view seen from the side is shown. As shown in FIG. 9A, the surface member 112 of the partition 10D is composed of a surface member 112a located on the space 42 side outside the booth and a surface member 112b located on the partition booth 32 side. . The height from the floor surface 22 on the surface member 112b side is configured to be higher than the height from the floor surface 22 on the surface member 112a side, and is indicated by a broken line portion in FIG. The upper part of the partition 10D is opened. A portion of the surface member 112b that is higher than the surface member 112a functions as a sound shielding portion provided at a position that shields a sound propagation path from the area where conversation is performed to the adjacent space via the partition 10D. To do. The height of the side wall 2c between the surface member 112a and the surface member 112b from the floor surface 22 may be the same as the height of the surface member 112a from the floor surface 22, but the masking sound via the side wall 2c may be the same. If it is necessary to block the propagation path, the height of the surface member 112b may be the same.

  In addition, in the partition 10D, an installation base 2d for installing the speaker 101, which is a sound emitting means, is provided at the height of the upper end of the surface member 112a, and two speakers are provided on the installation base 2d. 101 is provided. The surface member 112a has substantially the same height as the conversation person's mouth in the partition booth 32, and the installation base 2d is horizontally installed from the upper end of the surface member 112a toward the surface member 112b. The speaker 101 emits a masking sound. The speaker 101 is installed such that the sound emission direction of the masking sound is directly above or obliquely upward, and the direct sound of the masking sound emitted from the speaker 101 is incident on the ceiling 24. In FIG. 9, the speaker 101 is installed so that the directivity axis of the speaker 101 faces the direction of the ceiling 24. When the speaker 101 is omnidirectional, the sound emitting part of the speaker 101 is provided with a reflector or the like so that the radiation direction of the masking sound is the direction of the ceiling 24 (directly above or obliquely upward). You may make it comprise the sound emission means which provided the member which controls directivity physically.

  The propagation path of the masking sound when the masking sound is emitted from the speaker 101 and the sound emitted in the partition booth 32 to the space 42 will be described with reference to FIG. For example, when a talker utters a voice from the position of the height X in the partition booth 32, the voice propagation path is a propagation path indicated by a broken-line arrow in FIG. In each of the above embodiments, the sound absorbing material 124 absorbs the sound emitted from the conversation person, but not all of the sound emitted from the conversation person is absorbed by the sound absorbing material 124. 10 shows the propagation path of the sound that could not be absorbed. In other words, the sound that has not been absorbed by the sound absorbing material 124 among the sound in the booth 32 is roughly divided into a propagation path A1 that is reflected by the partition 10B and directed to the ceiling 24, and reflected by the ceiling 24 and directed to the space 42. Propagation path A2 toward the ceiling 24 and reflected by the ceiling 24 toward the space 42, and a propagation path A3 toward the surface member 112b of the partition 10D and diffracted at the upper end portion of the surface member 112b and toward the space 42 , The sound receiving point (position of the sound receiver) Y in the space 42 is transmitted.

  On the other hand, the propagation path of the masking sound emitted from the speaker 101 is the propagation path indicated by the solid line arrow in FIG. That is, the masking sound is broadly divided into a propagation path B1 that is reflected by the inner surface of the surface member 112b (the inner surface of the partition 10D) toward the ceiling 24, and reflected by the ceiling 24 toward the space 42. And the propagation path B <b> 2 that is reflected by the ceiling 24 and is reflected by the ceiling 24 toward the space 42, and is transmitted to the Y sound receiving point position of the space 42.

Thus, since the speaker 101 is installed at a position lower than the upper end of the surface member 112b, the propagation path of the masking sound emitted from the speaker 101 into the partition booth 32 is an inner surface of the surface member 112b ( The masking sound is suppressed by the partition booth 32 side. Therefore, it is not difficult for the talkers in the partition booth 32 to hear each other's voice due to the masking sound. In addition, the masking sound should just be shielded so that it may not propagate to the space except the upper space 7a on the partition booth 32 side in the space on the partition booth 32 side.
Further, the direction (A1, A2) in which the conversation voice reflected on the ceiling 24 propagates to the space 42 and the direction (B1, B2) in which the masking sound reflects on the ceiling 24 and propagates to the space 42 are substantially the same direction. Since the conversational voice and the masking sound have substantially the same attenuation characteristics (frequency characteristics), the affinity between the conversation voice and the masking sound is increased. For this reason, the conversation voice from the partition booth 32 and the masking sound are perceived by being merged at the position of the sound receiving point Y in the space 42, and the conversation voice in the partition booth 32 is heard by the person near the sound receiving point Y. It becomes difficult.

Further, when the conversation person and the speaker 101 have a symmetrical positional relationship across the surface member 112b, the speaker 101 is provided inside the partition 10D so as to be substantially the same height as the conversation person's mouth in the partition booth 32. Therefore, compared with the case where the speaker 101 is provided at a low position close to the floor surface 22, the propagation path of the conversation voice and the masking sound is almost the same direction, and the masking efficiency of the masking sound emitted into the space 42 is further increased. improves.
That is, when the speaker 101 is installed at a height close to the floor surface 22 in the partition 10D, the directivity of the masking sound upward is strong due to the space surrounded by the surface member 112a, the surface member 112b, and the side wall 2c. Become. Therefore, the propagation of the masking sound not only to the partition booth 32 but also to the space 42 is suppressed, and the masking sound is less likely to reach the further away from the surface member 112a in the space 42. Therefore, the conversation voice that is directed by the talker toward the space 42 and the propagation direction of the masking sound are not the same direction, so the conversation voice is not efficiently masked. On the other hand, when the speaker 101 is provided at substantially the same height as the conversation person's mouth in the partition booth 32, the sound transmission characteristics such as the sound propagation direction, distance attenuation and reverberation are from the speaker 101. Since the similarity (affinity) between the masking sound and the conversation voice uttered by the talker increases, the conversation voice is efficiently masked.
The configuration for masking voice as described above is also provided in the partition 10A in FIG. 3 and the partitions 50A and 50C in FIG.

(Modification 1-2)
FIG. 11A shows a perspective view of a partition 10E according to this modification, and FIG. 11B shows a cross-sectional view of the partition 10E shown in FIG. ing. The partition 10E according to this modification is modified in that the height of the surface member 112b located on the partition booth 32 side from the floor surface is higher than the surface member 112a located on the space 42 side. 1 is different from the modified example 1-1 in that the speaker 101 is provided on the installation base 2d provided at a predetermined position closer to the floor surface 22 than the upper end of the surface member 112a. That is, in this modification, the speaker 101 is installed at a position below the upper end of the surface member 112a than in the case of Modification 1-1. Hereinafter, in the configuration of the partition 10E of the present modification, a propagation path where the masking sound from the speaker 101 and the conversation voice in the partition booth 32 reach the space 42 will be described with reference to FIG.

As in the case of the modified example 1-1, when a conversation person utters a voice at the position X of the partition booth 32, the voice is propagated to the space 42 side through the propagation path indicated by the broken-line arrow in FIG. That is, the conversation voice in the partition booth 32 is broadly divided into a propagation path A1 that is reflected by the partition 10B and directed to the ceiling 24, reflected by the ceiling 24 and directed to the space 42, and directed to the ceiling 24 and reflected by the ceiling 24. Of the sound receiving point Y of the space 42 by the propagation path A2 toward the space 42 and the propagation path A3 diffracted at the upper end portion of the surface member 112b and toward the space 42 in the direction of the surface member 112b of the partition 10E. Transmitted to the position.
On the other hand, the masking sound emitted from the speaker 101 is propagated along a propagation path indicated by a solid line arrow in FIG. That is, the masking sound is broadly divided into a propagation path B1 reflected from the inner surface of the surface member 112b toward the ceiling 24, reflected from the ceiling 24 toward the space 42, and toward the ceiling 24. The light is transmitted to the position of the sound receiving point Y in the space 42 by the propagation path B2 reflected by the ceiling 24 and traveling toward the space 42 and the propagation path B3 diffracted by the upper end portion of the surface member 112a and traveling toward the space 42.

  As shown by the propagation path B1, the masking sound emitted from the speaker 101 is blocked by the inner surface of the surface member 112b because the masking sound propagation path toward the partition booth 32 is blocked. The masking sound does not make it difficult to hear each other's voice. In this modification, the conversational voice propagated to the space 42 by the propagation paths A1 and A2 and the masking sound propagated to the space 42 by the propagation paths B1 and B2 have substantially the same propagation direction and frequency characteristics, The conversation voice propagated to the space 42 on the path A3 and the masking sound propagated to the space 42 on the propagation path B3 have substantially the same propagation direction and frequency characteristics. Therefore, the conversation voice leaked into the space 42 is efficiently masked by the masking sound, so that the person in the space 42 cannot hear the conversation voice. Further, by providing the speaker 101 at a position below the upper end portion of the surface member 112a, a masking sound is once emitted in the space sandwiched between the surface member 112a and the surface member 112b, and from the opening above the partition 10E. Since the masking sound is emitted into the space 42, even when the number of speakers 101 is small, the feeling that the masking sound is localized at the position of the speakers 101 is reduced, and the masking sound can be heard from the entire opening above the partition 10E. Effects can be obtained. In addition, since the number of speakers 101 can be reduced, the device configuration can be simplified and the cost can be reduced.

  In this modification, the speaker 101 is arranged in the partition 10E so that the sound emission direction of the speaker 101 is the direction of the ceiling 24. However, the speaker 101 is provided at a position below the upper end of the surface member 112a. The speaker 101 may be installed such that the sound emission direction of the speaker 101 is the direction of the surface member 112a, the surface member 112b, or the side wall 2c. Even with this arrangement, the masking sound from the speaker 101 is reflected by the surface member 112a, the surface member 112b, and the side wall 2c, and the reflected sound is directed toward the ceiling 24. Accordingly, since the masking sound is emitted so that the conversation voice in the partition booth 32 is in the same direction as the direction in which the conversation voice propagates to the space 42, it becomes difficult for the person in the space 42 to hear the conversation voice. Further, by arranging the speaker 101 in this way, the masking sound emitted in the space surrounded by the surface member 112a, the surface member 112b, and the side wall 2c is emitted from the entire opening above the partition 10E to the space 42. Since the sound is heard, the feeling of localization of the masking sound at the position of the speaker 101 can be further reduced.

(Modification 1-3)
Next, the partition 10F according to Modification 1-3 of the present invention will be described. FIG. 13 shows a cross-sectional view of a partition 10F according to this modification. The partition 10F in this modification has the same height from the floor surface 22 of the surface member 112a located on the space 42 side and the surface member 112b located on the partition booth 32 side, and inside the partition 10F, It differs from the partition 10E of the modified example 1-2 in that the shielding member 21c is provided so as to be higher than the upper ends of the surface member 112a and the surface member 112b. This shielding member 21c has an installation part 211 on which the speaker 101 is installed, a leg part 212, and a shielding part 213, and is sandwiched between the surface member 112a and the surface member 112b.
The installation portion 211 is provided at a predetermined height so that the speaker 101 is installed below the upper end of the surface member 112a, and the speaker 101 is installed so that the sound emission direction of the speaker 101 is in the direction of the ceiling 24. The unit 211 is installed. This is common with the modified example 1-2.

  In this modification, when a masking sound is emitted from the speaker 101, the masking sound directed toward the partition booth 32 is shielded by the shielding part 213, reflected by the shielding part 213, and directed toward the ceiling 24. And is propagated in the direction of the space 42. Further, the masking sound directed toward the ceiling 24 is reflected by the ceiling 24 and propagated to the space 42, and the masking sound directed toward the space 42 is diffracted at the upper end portion of the surface member 112 a and propagated to the space 42. . Further, of the conversation voices uttered in the partition booth 32, the voices directed to the partition 10B are reflected by the partition 10B and directed to the ceiling 24, and reflected by the ceiling 24 and propagated to the space 42. Further, the sound traveling toward the ceiling 24 is reflected by the ceiling 24 and travels toward the space 42, and the sound traveling toward the surface member 112 b of the partition 10 </ b> F is diffracted by the upper end portion of the shielding portion 213 and propagates into the space 42. As described above, even when the partition 10F according to the present modification is used, the propagation direction of the sound emitted in the partition booth 32 and the propagation direction of the masking sound emitted from the speaker 101 are substantially the same, and the space Therefore, it is possible to efficiently mask the sound leaked from the partition booth 32 by the person in the 42.

(Modification 1-4)
Next, the partition 10G according to Modification 1-4 of the present invention will be described. FIGS. 14A and 14B show cross-sectional views of the partition 10G according to this modification. The partition 10G in this modification is common to the partition according to modification 1-3 in that the surface member 112a located on the space 42 side and the surface member 112b located on the partition booth 32 side are configured at the same height. To do. An adhesive member such as a hook or loop-shaped hook-and-loop fastener is attached to the inner surfaces of the surface member 112a and the surface member 112b constituting the partition 10G within a certain range from the upper ends of the surface member 112a and the surface member 112b. However, it is different from Modification 1-3 in that a leg member is not provided and a detachable shielding member 22c is provided with respect to the surface fastener provided on the surface member 112a and the surface member 112b.

As shown in FIG. 14A, the shielding member 22c is an L-shaped member having an installation part 221 for installing the speaker 101 and a shielding part 222 for shielding a masking sound emitted from the speaker 101. It is configured. On the surface of the shielding member 22c in contact with the surface member 112a or the surface member 112b, a hook or loop-shaped surface fastener for bonding to the surface fastener attached to each surface inside the surface member 112a and the surface member 112b is attached. (Not shown).
In addition, although this modification demonstrates the example which bonds the shielding board 22c on the inner wall of the partition 10G using a hook_and_loop | surface fastener, if the shielding member 22c is the structure which can be attached or detached to the inner wall of the partition 10G, double-sided tape, The shielding member 22c may be attached to the inner wall of the partition 10G using an adhesive member such as a magnet.

  Since the partition 10G in this modification includes a detachable shielding plate 22c, when shielding the masking sound from propagating to the partition booth 32 side, as shown in FIG. 14 (a), the shielding plate 22c. May be attached to the inner surface of the surface member 112b. Further, for example, when a booth is also formed on the side where the surface member 112a is located, the shielding plate 22c is arranged on the inner surface of the surface member 112b as shown in FIG. It may be pasted on. Thus, since the shielding plate 22c can be freely affixed to the inside of the surface member 112a or the surface member 112b, the direction in which the masking sound is shielded can be easily switched according to the use situation of the space partitioned by the partition 10G. be able to.

(Modification 1-5)
In each of the above-described modifications, an example in which the speaker 101 is installed as a sound emitting unit in the partition has been described. However, a sound emitting unit in which the speaker 101 is installed inside a partially opened box is provided inside the partition. You may comprise as follows. FIG. 15A is a cross-sectional view of a partition 10H according to this modification.
As shown in FIG. 15A, the partition 10H according to the present modification is common to the modification 1-2 except that a box 23c is provided in the partition 10H. In this modification, at least a part of the upper surface of the box 23c is opened, and a part of the side surface of the box 23c facing each inner surface of the surface member 112a and the surface member 112b is opened. Inside the box 23c, the sound output direction of the speaker 101 is different from the plane in which the opening of the box 23c is provided, that is, the direction of the side wall excluding the surface members 112a and 112b of the partition 10H. A speaker 101 is installed. That is, the direction in which the masking sound is emitted from the box 23c does not coincide with the sound emitting direction (directing axis) of the speaker 101, and at least one of the sound emitting direction of the speaker 101 or the opening of the box 23c is upward. If it is not suitable, it is good.

  The masking sound emitted from the box 23c and emitted from the opening on the upper surface is directed toward the ceiling 24. Further, the masking sound emitted in the box 23c and radiated from the opening on the side surface is directed toward the ceiling 24 while being reflected between the surface member 112a and the surface member 112b and the side surface of the box 23c. The masking sound reflected by the ceiling 24 is propagated to the space 42 in the direction substantially the same as the direction in which the conversation voice is propagated to the space 42 from the partition booth 32, as in the above-described modifications. In this modification, since the opening of the box 23c and the sound emission direction (directing axis) of the speaker 101 do not match, the direct sound of the masking sound emitted from the speaker 101 inside the partition 10H. Is not directly emitted to the outside of the partition 10H. Therefore, the feeling of localization of the masking sound at the position of the speaker 101 is reduced, and the conversation voice propagated from the partition booth 32 can be efficiently masked without giving a feeling of strangeness of the masking sound to a person near the surface member 112a. it can.

(Modification 1-6)
In Modification 1-5, the example in which the box 23c provided with the speaker 101 is provided inside the partition has been described. However, as illustrated in FIG. 15B, the box 23c is externally installed on one surface member 112a of the partition 10J. May be. In this case, the box 23c is installed at a position lower than the upper end of the surface member 112a so that the opening of the box 23c is in the direction of the ceiling 24, and other than the box 23c excluding the surface provided with the opening. The opening is not provided on the surface. By providing the box 23c in which the speaker 101 is installed at a position lower than the upper end portion of the surface member 112a, a portion from the position of the box 23c to the upper end of the surface member 112a functions as a shielding portion.
When the masking sound from the speaker 101 provided inside the box 23c is emitted, the masking sound resonated from the opening provided on the upper surface of the box 23c is emitted, and the direction of the surface member 112b, that is, the partition The masking sound toward the inside of the booth 32 is shielded by the surface member 112a. In this case, hooks or loop-shaped hook-and-loop fasteners for installing the box 23c are located closer to the floor than the upper end of the surface member 112a so that the masking sound is transmitted to the space 42. An adhesive member is provided to install the box 23c. In this case, the heights of the upper end portions of the surface member 112a and the surface member 112b may be the same, and the upper surface portion of the partition 10J does not need to be opened. Further, the speaker 101 itself may be externally attached to the surface member 112a of the partition 10J so that the sound emission direction of the speaker 101 is the direction of the ceiling 24 without putting the speaker 101 in the box 23c.

(Modification 1-7)
Further, in each of the modifications described above, an example in which two speakers 101 are provided in the partition and the sound emission direction of the masking sound only on one wall surface side of the partition is shielded has been described. However, as in the partition 10K illustrated in FIG. You may comprise. A partition 10K illustrated in FIG. 16 includes a surface member 112a, a surface member 112b, and a side wall 112c that have the same height from the floor surface. Speakers 101L and 101R are placed on top of the surface member 112a, the surface member 112b, and the side wall 112c. An installation base 241 to be installed is provided.
Further, three partition plates 241c having the same width as the side wall 112c are installed in parallel with the side wall 112c at the upper end portion and the intermediate position on both sides in the longitudinal direction of the installation table 241. And between each partition plate 241c, the shielding part 24d1 and the shielding part 24d2 are provided so that each of the surface member 112b and the surface member 112a may be followed. Further, as shown in FIG. 16, the upper end portions of the shielding portion 24d1 and the surface member 112b are opened, and the upper end portions of the shielding portion 24d2 and the surface member 112a are opened.
The shielding part 24d1 shields the propagation path of the masking sound from the speaker 101R provided on the shielding part 24d1 side to the surface member 112a side, and the shielding part 24d2 is the surface from the speaker 101L provided on the shielding part 24d2 side. The propagation path of the masking sound toward the member 112b is shielded.
With such a configuration, a masking sound can be emitted in either direction of the surface members 112a and 24b. Therefore, even if the layout is changed after the partition 10K is installed, the desired direction can be obtained without changing the direction of the partition 10K. A masking sound can be emitted in either direction. When a plurality of partition booths 32 are formed using the partition 10K, a masking sound may be emitted to each adjacent booth, and one booth may be used depending on the usage situation of the adjacent booth. The masking sound may be emitted from a speaker provided on the side of one of the shielding portions so that the masking sound is emitted in the direction of.
Note that a plurality of masking sounds may be emitted from one partition 10K by changing the masking sounds emitted from the speakers 101L and 101R.

(Modification 1-8)
In the above-described modification 1-2, the example in which the upper surface portion of the partition 10E is opened has been described. However, as illustrated in FIG. 17, a plurality of slit portions S or openings S are provided in the surface member 112a of the partition 10L. You may comprise as follows. With such a configuration, the masking sound propagated from the opening portion on the upper surface of the partition 10E and the masking sound propagated from the slit portion S or the opening portion S are mixed, so that the sound is emitted from the slit portion S or the opening portion S. The localization feeling of the masking sound can be eased, and the masking sound can be emitted to the space 42 without a sense of incongruity.

(Modification 1-9)
In each of the above-described modifications, the example in which the speaker 101 is installed in the partition so that the sound emission direction is the direction of the ceiling 24 has been described. However, when the speaker 101 is installed inside the partition, the masking sound of the speaker 101 is generated inside the partition. If the direction output from the partition to the outside of the partition is the direction toward the ceiling 24, the direction of the speaker 101 may be set so that the sound emission direction of the speaker 101 is different from the direction of the ceiling surface. For example, as shown in FIG. 18, the sound emission direction of the speaker 101 is on the surface member 112b (or on the inner surface of the surface member 112a (or the inner surface of the surface member 112b) in the partition 10M in which the upper surface portion is opened. You may install so that it may become the direction (arrow T) of the surface member 112a). And the upper end of the surface member 112a is lower than the upper end of the surface member 112b. When the speaker 101 is installed in this way, the masking sound emitted from the speaker 101 is repeatedly reflected on the inner surfaces of the surface member 112a and the surface member 112b and passes above the upper end of the surface member 112a. The sound is output toward the ceiling and further emitted into the space 42.

(Modification 1-10)
In Modification 1-3 described above, the example in which the detachable L-shaped shielding member 22c is provided in the partition has been described. However, as long as the shielding direction for shielding the masking sound from the speaker 101 can be regulated, the modification 1-3 is described. Not limited to this.
An example of such a partition will be described with reference to FIG. FIG. 19 shows a cross-sectional view of a partition according to this modification. As shown in FIG. 19A, the speaker 101 is provided at a predetermined position inside the partition 10N, and the shielding member 27c that covers the upper surface portion of the partition 10N is provided. The shielding member 27c is configured to be detachable at each upper end portion of the surface member 112a and the surface member 112b. For example, when the shielding member 27c is lifted in the ceiling surface direction with the shielding member 27c attached to the upper end portion of the surface member 112a, the upper surface portion (broken line portion) of the partition 27 is opened as shown in FIG. To do. At this time, the shielding member 27c is arranged at the upper end portion of the surface member 112a so that the surface member 112a side is higher than the surface member 112b, and the propagation path of the masking sound toward the surface member 112a side is shielded by the shielding member 27c. it can. Further, when the shielding member 27c is lifted in the direction of the ceiling surface with the shielding member 27c attached to the upper end portion of the surface member 112b, the upper surface portion (broken line portion) of the partition 27 is opened as shown in FIG. To do. At this time, the shielding member 27c is disposed at the upper end of the surface member 112b, and the surface member 112b side is higher than the surface member 112a, and the propagation path of the masking sound toward the surface member 112b side is shielded by the shielding member 27c. it can.

(Modification 1-11)
In each of the above-described modifications, when a masking sound is emitted from the speaker 101 provided in the partition, for example, a sound emission control device that causes the speaker 101 to emit a masking sound is installed inside or outside the partition. Each speaker 101 may be connected to the sound emission control device by wire or wirelessly. A configuration example of the sound emission control device and the speaker 101 in this case is shown in FIG. As shown in FIG. 20, the sound emission control device 30 includes a sound source 301, an operation unit 302, a signal processing unit 303, and a control unit 304.

  The sound source 301 has a function of generating or reading out a predetermined masking sound and outputting a sound signal under the control of the control unit 304, and the operation unit 302 is an operation for switching on / off the power of the sound emission control device 30. It has a button, an operation button for changing the volume value of the masking sound to be emitted from the speaker 101, and the like, and has a function of outputting an operation signal indicating a switch operation received from the user to the control unit 304.

The signal processing unit 303 performs predetermined signal processing on the signal indicating the masking sound output by the sound source 301 under the control of the control unit 304, and outputs the masking sound signal and information indicating the volume value of the masking sound. It has a function of sending to the speaker 101.
The control unit 304 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory), and has a function of controlling each unit connected to the control unit 304. .
The speaker 101 includes an amplifier, and performs a predetermined amplification process on the sound signal of the masking sound sent from the sound emission control device 30 and emits the sound.

When the user performs an operation of turning on the power button of the operation unit 302, the control unit 304 of the sound emission control device 30 generates or reads out a masking sound in the sound source 301 and outputs the masking sound to the signal processing unit 303. The sound signal of the masking sound that has been subjected to the signal processing is output to each speaker 101. Each speaker 101 performs a predetermined amplification process on the sound signal of the masking sound output from the sound emission control device 30 to emit the masking sound.
In addition, when the user performs an operation to turn off the power button of the operation unit 302, the control unit 304 of the sound emission control device 30 stops the generation of the masking sound in the sound source 301, and the signal processing unit 303 transmits each speaker 101 to the speaker 101. Stop sound signal output to.

(Modification 1-12)
In each of the above-described modifications, the example in which the sound emission direction of the speaker 101 provided in the partition is arranged in the ceiling direction has been described. However, for example, as illustrated in FIG. The speaker 101 is disposed so as to be inclined with respect to the surface direction (vertical direction) of the surface member 112a or the surface member 112b so that the sound emission direction of the masking sound emitted from the 101 is on the ceiling 24 side, and the sound emission direction (of the speaker 101 is What is necessary is just to arrange | position so that a directional axis | shaft may become the ceiling 24 side (crossing the ceiling 24). As shown in FIG. 21, the sound emitted from the partition booth 32 propagates with the speaker 101 inclined at a predetermined angle from the vertical direction while the direction of the propagation path A toward the space 42 substantially overlaps the direction of the propagation path B of the masking sound. By arranging the direction of the path B and the direction of the directivity axis of the speaker 101 to coincide with each other, the level of the masking sound toward the reflection point on the ceiling surface reaching the sound receiving point Y increases, and the partition booth 32 in the space 42 is increased. It is possible to make it difficult to hear the conversation voice. The speaker 101 may be configured as a speaker array by a plurality of speakers. In this case, the sound beam direction (sound emission direction) of the speaker array only needs to be directed toward the ceiling. Furthermore, when the speaker 101 is configured using a single speaker or a speaker array, when a plurality of sound emission directions are set, any sound emission direction may be directed to the ceiling side.

(Modification 1-13)
An example of a partition structure provided with a configuration for masking voice will be described. FIG. 22 shows a plan view and a longitudinal sectional view of the partition 10Q.
In the figure, the core material 114 is a paper honeycomb core. The surface member 112 is obtained by pasting a cloth material on a steel plate. The sound absorbing material 124 is glass wool. The surface member 112 is obtained by pasting a cloth material on a steel plate, and is provided with a plurality of slits. In the upper part of the first region 110, a space is formed by filling a case 190 made of a steel plate with glass wool 191. The speaker 101 is provided in the space. The upper end 200 of the first region is provided with an opening, and the upper end of the casing 190 closer to the opening is lower than the upper end of the casing 190 farther from the opening. . The sound emitted from the speaker 101 goes to the space 42 through the opening and the upper end of the casing 190 closer to the opening as indicated by the arrow t. The leg 130 has a range in the height direction from the floor surface 22 to a position 50 mm from the floor surface. The second region 120 has a range in the height direction from a position 50 mm from the floor surface to a position 350 mm from the floor surface. The first region 110 has a range in the height direction from a position 350 mm from the floor surface to a position 1800 mm from the floor surface.

(Modification 2)
In the above-described embodiment and each modification, each partition or wall surface has two regions, the first region and the second region, but may have three or more regions. In this case, any two of the three areas are “when one of the two areas has a higher sound absorption rate than the other area and the partition is erected on the floor. If the condition “provided at a position closer to the floor than the other region” is satisfied, it is included in the content of the present invention. Even if each partition or wall surface has a region where the sound absorption rate increases continuously as it approaches the floor, “part of the region in which the sound absorption rate increases continuously” The area has a higher sound absorption rate than the area of the other part and is provided at a position closer to the floor than the area of the other part when the partition is erected on the floor " If it satisfies, it will be included in the content of the present invention.

  DESCRIPTION OF SYMBOLS 10,50 ... Partition, 60 ... 1st sound absorption means, 70 ... 2nd sound absorption means, 100,500 ... Main-body part, 110,510 ... 1st area | region, 112,122,502 ... Surface member, 114,504 ... Core material, 120, 520 ... Second region, 124 ... Sound absorbing material, 130 ... Leg part

The present invention also relates to the partition.

Figure 7 is a diagram showing an example of a propagation path of reflected sound against the conventional partition. In the room 700 shown in FIG. 7, a partition 702A, a partition 702B, and a partition 702C are installed. Accordingly, a space 712, a space 714, a space 716, and a space 718 are formed in the room 700. For example, the surfaces of these partitions are covered with a flat plate member such as a steel plate or an aluminum plate. For this reason, as indicated by the propagation path 732, the sound emitted from the person 722 in the space 714 and directed to the lower side of the partition 702 B is reflected by the lower side of the partition 702 B, the ceiling, and the wall surface of the room 700, thereby Will propagate up to. Further, as indicated by the propagation path 734, the sound emitted from the person 722 and directed to the ceiling is reflected below the ceiling and the partition 702 </ b> C and propagates to the person 726 in the space 716. Further, as indicated by the propagation path 736, the sound emitted from the person 722 and directed to the floor is reflected below the floor, the ceiling, and the partition 702C and propagates to the person 726. From the same principle, the sound emitted from the person 724 propagates to the person 722 and the person 726, and the sound emitted from the person 726 propagates to the person 722 and the person 724. In this way, sound emitted from any one of the space 712, the space 714, the space 716, and the space 718 is reflected at least by the ceiling facing the entire space where the partitions are installed (the spaces 712 to 718). And propagates to another space.

However, with the technique described in Patent Document 1, it is not possible to prevent sound from reflecting off the ceiling and leaking outside. Further, in the technique described in Patent Document 2, since the sound absorbing material layer is provided over the entire screen, the sound is excessively absorbed, and a strange feeling as if in an anechoic room is felt in the partition booth. Problems such as making the user feel. As described above, the conventional technology cannot simultaneously solve the problem of suppressing sound from being reflected off the ceiling and leaking outside and the problem of not excessively absorbing sound in the partition booth.
Accordingly, the present invention includes the problem of reducing the sound leaking to the outside of the partition booth, a problem that does not excessively absorbing sound in the partition booth, can be solved at the same time, to provide a partition With the goal.

In order to solve the above-described problems, the present invention provides a partition standing on the floor surface , which has a first region and a higher sound absorption coefficient than the first region, and the partition stands on the floor surface. providing partitions, characterized in that a second region provided in the than the first region closer to the floor surface located when set. Before Stories second region, it emitted from the first space sandwiched between the partition and the other partitions and sandwiched by or the partition and the wall surface, propagates in a second space other than said first space The propagation path may be a propagation path including a ceiling facing the space where the partition is erected as a reflection surface . Before Stories second region, emitted from the second space other than the first space sandwiched between the partition and another partition, be a region on the propagation path of sound propagating in the first space The propagation path may be a propagation path including a ceiling facing the space where the partition is erected as a reflection surface . The sound absorbing means has a higher sound absorption rate than the wall surface of the space adjacent to the space sandwiched between the partition and the other partition, and the wall surface has the same height as the second region of the partition. You may further provide the sound absorption means provided in the position .

The external appearance of the partition 10 which concerns on embodiment is shown. A cross section of the partition 10 is shown. Showing an installation example of the partition. Showing an installation example of the partition. The simulation result of the sound reduction performance of the partition booth is shown. It shows another exemplary configuration of a partition. Showing another example of installation of partition. Showing another example of installation of partition. The results of acoustic simulation against the conventional partition. It is a figure explaining each area | region in a modification. (a) is a perspective view which shows the example of the panel which concerns on the modification 1. FIG. (b) is sectional drawing of the panel shown to (a). It is a figure explaining the propagation path | route of the conversation audio | voice and masking sound in the modification 1. FIG. (a) is a perspective view which shows the example of the panel which concerns on the modification 2. FIG. (b) is sectional drawing of the panel shown to (a). It is a figure explaining the propagation path | route of the conversation audio | voice and masking sound in the modification 2. FIG. It is sectional drawing which shows the example of the panel which concerns on the modification 3. (a) is sectional drawing which shows the example of the panel which concerns on the modification 4. FIG. (b) is sectional drawing of the panel shown to (a). (a) is sectional drawing which shows the example of the panel which concerns on the modification 5. FIG. (b) is a side view showing an example of a panel according to Modification 6. 10 is a cross-sectional view showing an example of a panel according to Modification 7. FIG. It is sectional drawing which shows the example of the panel which concerns on the modification 8. It is sectional drawing which shows the example of the panel which concerns on the modification 9. (a)-(c) is sectional drawing which shows the example of the panel which concerns on the modification 10. As shown in FIG. It is a block diagram which shows the structure of the sound emission control apparatus which concerns on the modification 11, and a speaker. It is a figure explaining the example of installation of the speaker of the modification 12. FIG. It is the top view and longitudinal cross-sectional view of the partition 10 of the modification 12.

FIG. 3 (a), 3 (b) shows an example of installation of partitions. FIG. 3 (a), in both FIG. 3 (b), the room 20, as a partition, the partition 10A, partition 10B, and the partition 10C is provided. In the following description, these partitions 10 are collectively referred to as “each partition 10”. The partitions 10 are erected side by side on the floor surface 22 of the room 20. Thus, a partition booth 30 that is a space between the partition 10A and the partition 10B is formed in the room 20. In the room 20, a partition booth 32, which is a space between the partition 10B and the partition 10C, is formed. In the room 20, a space 40 that is sandwiched between the partition 10 </ b> A and the wall surface 26 facing the partition 10 </ b> A and adjacent to the partition booth 30 is formed. In the room 20, a space 42 that is sandwiched between the partition 10 </ b> C and the wall surface 28 facing the partition 10 </ b> C and adjacent to the partition booth 32 is formed. The height from the floor surface 22 to the ceiling 24 is higher than the height of each partition 10. For this reason, a gap is formed between each partition 10 and the ceiling 24 which can be a sound leakage path to an adjacent space.

No sound absorbing means such as a sound absorbing material 124 is provided in each of the first regions 110 of the partition 10A and the partition 10B forming the partition booth 30. For example, the sound traveling toward the first region 110 of the partition 10B is incident on the surface of the first region 110 at an angle closer to the perpendicular than the sound traveling toward the second region 120 of the partition 10B. For this reason, most of the sound emitted toward the first area 110 of the partition 10 </ b> B echoes in the partition booth 30. Therefore, it is possible to ensure an appropriate sound sound in the partition booth 30. In addition, the sound that goes upward of the first area 110 of the partition 10B becomes sound that leaks in a substantially horizontal direction from the gap between the upper end of the partition 10A and the ceiling 24, but the diffraction effect of the partition 10A (so-called sound insulation effect of soot) ), The leakage into the adjacent space is small. Thus, FIG. 3 (a), according to the partition shown in FIG. 3 (b), of the sound produced by the partition booth 30. In the components associated with leakage into adjacent spaces second While the sound is absorbed in the area 120, the component not related to leakage does not absorb much sound in the first area 110, so that it does not give the user a sense of incongruity as if in an anechoic room. In addition, among the sounds uttered in the partition booth 30, components that echo toward the ceiling and easily leak into the adjacent space are absorbed by the sound absorbing means called the second region 120. It can absorb sound moderately. Similarly, sound absorbing means such as the sound absorbing material 124 is not provided in each of the first regions 110 of the partition 10B and the partition 10C forming the partition booth 32. Therefore, FIG. 3 (a), according to the partition shown in FIG. 3 (b), so as not to or feel uncomfortable, such as if the anechoic chamber to the user, the audio of the partition booth 32 It can absorb sound moderately.

Figure 5 shows another exemplary configuration of a partition. Partition shown in FIG. 5 includes a partition 50 and the first sound absorbing means 60. The partition 50 is erected on the floor surface. The partition 50 includes a flat plate-like main body 500 and legs 530. The leg portion 530 supports the main body portion 500 in a standing state. The partition 50 is erected to divide the space into a plurality of spaces. The main body 500 includes a flat surface member 502 and a core member 504 whose both surfaces are covered with the surface member 502. In the example shown in FIG. 5, a steel plate is used for the surface member 502.

FIG. 6 (a), the FIG. 6 (b) shows another example of installation of partitions. FIG. 6 (a), the In any 6 of (b), the room 20, as a partition, the partition 50A, partition 50B, and the partition 50C is provided. In the following description, these partitions 50 are collectively referred to as “each partition 50”. The partitions 50 are erected side by side on the floor surface 22 of the room 20. Thus, a partition booth 80 that is a space between the partition 50A and the partition 50B is formed in the room 20. In the room 20, a partition booth 82, which is a space between the partition 50B and the partition 50C, is formed. In the room 20, a space 90 that is sandwiched between the partition 50 </ b> A and the wall surface 26 facing the partition 50 </ b> A and adjacent to the partition booth 80 is formed. In the room 20, a space 92 that is sandwiched between the partition 50 </ b> C and the wall surface 28 facing the partition 50 </ b> C and adjacent to the partition booth 82 is formed. The height from the floor surface 22 to the ceiling 24 is higher than the height of each partition 50. For this reason, a gap is formed between each partition 50 and the ceiling 24 that can be a sound leakage path to an adjacent space.

The first region 510 of each of the partition 50A and the partition 50B forming the partition booth 80 is not provided with sound absorbing means such as the first sound absorbing means 60A to 60D. For example, the sound toward the first region 510 of the partition 50B is incident on the surface of the first region 510 at an angle closer to the vertical than the sound toward the second region 520 of the partition 50B. For this reason, most of the sound directed to the first area 510 of the partition 50B echoes in the partition booth 80. Therefore, it is possible to secure-out proper sound of speech in the partition booth 80 within. In addition, the sound that goes upward of the first area 510 of the partition 50B becomes sound that leaks in a substantially horizontal direction from the gap between the upper end of the partition 50A and the ceiling 24, but is attenuated by the diffraction effect of the partition 50A, so There is little leakage to the space. Thus, FIG. 6 (a), the according to the partition shown in FIG. 6 (b), of the sound produced by the partition booth 80 within, only components associated with leakage into the adjacent space first While the second region 520 absorbs sound, the component that is not related to leakage does not absorb much sound in the first region 510, so that it does not give the user a sense of incongruity as if in an anechoic chamber. Similarly, sound absorbing means such as the first sound absorbing means 60A to 60D are not provided in the first regions 510 of the partition 50B and the partition 50C forming the partition booth 82, respectively. Thus, FIG. 6 (a), the according to the partition shown in FIG. 6 (b), or feel uncomfortable, such as if the anechoic chamber the user, so that no voice may become unclear In addition, the sound in the partition booth 82 can be appropriately absorbed.

Similarly, the first region 510 of the wall surface 26 that forms the space 90 is not provided with sound absorbing means such as the second sound absorbing means 70A. Therefore, according to the partition shown in FIG. 6 (a), FIG. 6 (b), the sense of discomfort such as if the anechoic chamber so as not to or provided to the user, the sound in the space 90 Can be absorbed moderately. Similarly, the first region 510 of the wall surface 28 that forms the space 92 is not provided with sound absorbing means such as the second sound absorbing means 70B. Therefore, according to the partition shown in FIG. 6 (a), FIG. 6 (b), the sense of discomfort such as if the anechoic chamber so as not to or provided to the user, the sound in the space 92 Can be absorbed moderately.

A partition, FIG. 3 (a), the partition shown in FIG. 3 (b), the second sound absorbing means 70A, 70B may be further provided with configure. Further, partition includes a partition 10, partition 50 and may be configured to mix. Partition shown in FIG. 6 (a), FIG. 6 (b) is provided with the both of the first sound absorbing means 60 and the second sound absorbing means 70 is not limited thereto. For example, partitions may be configured to include one of the first sound absorbing means 60 and the second sound absorbing means 70. The first sound absorbing means 60 is not limited to the partition 50, and is, for example, on the floor 22 or the ceiling 24, on the propagation path of the sound reflected by the ceiling 24 and leaking to the adjacent room, or reflected by the ceiling 24 and leaking from the adjacent room. It may be provided on a voice propagation path. Further, the second sound absorbing means 70 is not limited to the wall surface 26 and the wall surface 28, but is reflected on the floor 22 or the ceiling 24 on the propagation path of the sound reflected by the ceiling 24 and leaking to the adjacent room, or by the ceiling 24. It may be provided on the propagation path of the sound leaked from the adjacent room.

The sound propagation path reflected from the ceiling 24 and leaking to the next room, and the sound propagation path reflected from the ceiling 24 and leaked from the next room are the partition placement position, partition shape, partition size, space shape, the size of the space, the presence or absence of an obstacle, the material of the ceiling 24, the material of the floor 22, such as wall materials 26 and the wall 28 will vary depending on the installation conditions of the partitions. Therefore, according to the installation conditions of the partition, the configuration of the second region 120 in the partition 10, the material, shape, size, and may be different at least one of position. Further, according to the installation conditions of the partition, the configuration of the first sound absorbing means 60, the material, shape, size, and may be different at least one of position. Further, according to the installation conditions of the partition, the configuration of the second sound absorbing means 70, the material, shape, size, and may be different at least one of position.

Claims (4)

It has a partition that stands on the floor,
The partition is
A first region;
A second region provided at a position closer to the floor surface than the first region when the partition is erected on the floor surface. A partition structure characterized by having. The second region is
An area on the propagation path of the sound emitted from the first space sandwiched between the partitions and propagating to a second space other than the first space;
The propagation path is
The partition structure according to claim 1, wherein the partition structure is a propagation path including a ceiling facing a space where the partition is erected as a reflecting surface. The second region is
An area on the propagation path of the sound emitted from the second space other than the first space sandwiched between the partitions and propagating to the first space;
The propagation path is
The partition structure according to claim 1, wherein the partition structure is a propagation path including a ceiling facing a space where the partition is erected as a reflection surface. A sound absorbing means having a higher sound absorption rate than a wall surface of a space adjacent to the space sandwiched between the partitions, wherein the sound absorbing means is provided at the same height as the second region of the partition on the wall surface. The partition structure according to claim 1, further comprising:

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