JP2012082616A - Partition panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a partition panel capable of masking such that conversation voice in one side of compartments partitioned by the panel can not be heard in the other side of the compartments, without the state that the conversation in the one side is hard to listen due to masking sound.SOLUTION: A partition panel 2 is provided with a loudspeaker 10 installed between wall surfaces 2a, 2b such that the direction of a ceiling surface 5 becomes a sound emitting direction. Masking sound from the loudspeaker 10 directed to the direction of the wall surface 2b of the panel 2 is shielded by the wall surface 2b. Although conversation voice emitted inside a booth 4 is propagated to an external space 6 through a path where the conversation voice is reflected by the ceiling surface 5 and propagates to the external space 6 and through a path where the conversation voice diffracts the wall surface 2b and propagates to the external space 6 (shown by dotted lines A), the conversation voice is masked by the masking sound (shown by solid lines B) reflected by the ceiling surface 5 and propagating to the external space 6.

Description

  The present invention relates to a partition panel technology for partitioning a space.

  By dividing the space into various shapes using partition panels, it is possible to easily install booths such as reception spaces and negotiation spaces. In addition, a technique for masking voice so that conversation voice in the booth does not leak outside the booth through the ceiling surface has been proposed. In Patent Document 1 below, when a speaker is installed at the upper end of the panel, a reflector that reflects sound is provided on the ceiling surface of the panel, and the masking sound is emitted upward from the speaker, the ceiling surface A technique for controlling the direction in which a masking sound is emitted from a speaker by changing the inclination of the reflector is disclosed.

JP-A-6-175666

By the way, when the masking sound is emitted from the speaker provided on the panel, the conversation does not become difficult to hear due to the masking sound inside the booth, and the conversation inside the booth leaked outside the booth can be heard outside the booth. It is necessary to mask the conversation voice in the booth as efficiently as possible.
The present invention provides a partitioning panel that can mask the conversation on one side so that the conversation on one side is not difficult to hear by the masking sound, and the conversation voice on one side cannot be heard on the other side. With the goal.

The partition panel according to claim 1 of the present invention has a height that does not contact the ceiling surface when installed on the floor surface, and includes a first wall surface and a second wall surface facing the first wall surface. A panel main body; and a sound emitting means provided between the first wall surface and the second wall surface of the panel main body for converting the supplied masking sound signal into a sound wave and outputting the sound wave, The emission position from which the sound wave output from the sound emitting means is emitted to the outside of the panel body is above the panel body, and the panel body is out of the propagation path of the sound wave from the emission position. The first wall surface has a shielding portion that shields a space that serves as a partition wall and a propagation path toward an upper space above the space.
A partition panel according to claim 5 of the present invention has a height that does not contact the ceiling surface when installed on a floor surface, and includes a first wall surface and a second wall surface facing the first wall surface. And a sound emitting means for converting the supplied masking sound signal into a sound wave and outputting the sound wave, and the sound emitting means is a surface of the second wall surface on the space side where the second wall surface serves as a partition wall. The sound wave is output at a position closer to the floor surface than the upper end of the second wall surface so that the output direction of the sound wave is on the ceiling surface side, and the panel body is located from the position where the sound emitting means is provided. In the portion up to the upper end of the second wall surface, of the propagation path of the sound wave output by the sound emitting means, the first wall surface is directed to a space where the first wall surface is a partition and an upper space above the space. The propagation path is shielded.

According to the structure which concerns on Claim 1, when the masking sound is emitted by the sound emission means, the propagation path of the masking sound toward the one space side where the first wall surface is a partition is shielded by the shielding part, Masking sound is propagated to the other space where the second wall surface is a partition wall. For this reason, people who are talking in one space side will not be able to hear each other's voice due to the masking sound, and the conversation voice emitted in one space side will be propagated to the other space side through the ceiling surface. However, since the conversation voice is masked by the masking sound through the ceiling surface in the same manner as the conversation voice, the conversation voice is difficult to hear on the other space side.
According to the structure which concerns on Claim 5, when the masking sound is emitted by the sound emission means, the person who is conversing on the one side of the space where the first wall surface is a partition wall will hear each other's voice by the masking sound. Is difficult to hear, and in the other space where the second wall surface is a partition wall, the masking sound is propagated, so that it is difficult to hear the conversation voice generated in one space.

Further, in the partition panel according to claim 1, the upper end portion of the panel body is configured such that the first wall surface is higher than the second wall surface, the upper surface of the panel body is opened, and the opening portion is the emission portion. The sound emitting means is a position closer to the floor than the upper ends of the first wall surface and the second wall surface of the panel body, and the output direction of the sound wave is the ceiling surface side. The shielding portion may be configured by a portion of the first wall surface from an installation position of the sound emitting means to an upper end portion of the first wall surface.
According to this configuration, when the masking sound is emitted by the sound emitting means, the propagation of the masking sound to one space side in which the first wall surface is the partition wall is suppressed by the panel body that also serves as the shielding portion. Therefore, people who are talking on one side of the space do not have difficulty in hearing each other's voice due to the masking sound. Also, since the masking sound is emitted from the inside of the panel body to the ceiling surface side, the masking sound is heard from the entire upper part of the panel body on the other space side where the second wall surface is a partition wall. The localization of the audible masking sound can be reduced.

Further, in the partition panel according to claim 1, the upper end portion of the panel body is configured such that the first wall surface is higher than the second wall surface, the upper surface of the panel body is opened, and the opening portion is the emission portion. The sound emitting means is provided at the same height as the upper end of the second wall surface, and is provided so that the output direction of the sound wave is on the ceiling surface side. Further, it may be configured by a portion of the first wall surface from an installation position of the sound emitting means to an upper end portion of the first wall surface.
According to this configuration, when the masking sound is emitted by the sound emitting means, the propagation of the masking sound to one space side in which the first wall surface is the partition wall is suppressed by the panel body that also serves as the shielding portion. Therefore, people who are talking on one side of the space do not have difficulty in hearing each other's voice due to the masking sound. Also, the conversation voice transmitted from one space side to the other space whose second wall surface is a partition through the ceiling surface is emitted in the direction of the ceiling surface and transmitted to the other space through the ceiling surface. Therefore, it is difficult to hear the conversation voice in the other space.

In the partition panel according to claim 1, an upper surface of the panel body is opened, an opening portion is the emission position, and the shielding portion is detachably provided along the first wall surface. The upper end portion of the shielding portion when provided along the first wall surface may be formed to be higher than the upper end portion of the second wall surface.
According to this configuration, the shielding portion can be attached to the first wall surface according to the necessity of masking the conversational voice emitted in one space where the first wall surface is a partition wall.

It is a figure explaining the space in which the panel which concerns on Embodiment 1 was installed. (A) is a perspective view which shows the example of the panel which concerns on Embodiment 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 Embodiment 1. FIG. (A) is a perspective view which shows the example of the panel which concerns on Embodiment 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 Embodiment 2. FIG. It is sectional drawing which shows the example of the panel which concerns on Embodiment 3. FIG. (A) And (b) is sectional drawing which shows the example of the panel which concerns on Embodiment 4. FIG. (A) is sectional drawing which shows the example of the panel which concerns on the modification 1. FIG. (B) is a side view showing an example of a panel according to Modification 2. It is a perspective view which shows the example of the panel which concerns on the modification 3. FIG. It is sectional drawing which shows the example of the panel which concerns on the modification 4. 10 is a cross-sectional view showing an example of a panel according to Modification 5. FIG. (A)-(c) is sectional drawing which shows the example of the panel which concerns on the modification 6. As shown in FIG. It is a block diagram which shows the structure of the sound emission control apparatus which concerns on the modification 7, and a speaker. It is a figure explaining the example of installation of the speaker of the modification 8.

<Embodiment 1>
FIG. 1 is a view of a space partitioned by the partition panel according to the present embodiment as viewed from the side of the panel. In this figure, a partitioning panel 2 (hereinafter referred to as panel 2) installed on the floor surface 1 has a height that does not contact the ceiling surface 5 when installed on the floor surface 1.
By installing the panel 2 on the floor surface 1, the space in which the panel 2 is installed is partitioned into a booth 4 inside the panel 2 and an external space 6 outside the panel 2, respectively. In this embodiment, the booth 4 is a space indicated by an alternate long and short dash line surrounded by the wall surface 3, the panel 2, the floor surface 1, and the ceiling surface 5, including the upper space 7 a of the booth 4 (the space indicated by the broken line in FIG. 1). The external space 6 is defined as a space indicated by an alternate long and short dash line surrounded by the panel 2, the floor surface 1, and the ceiling surface 5, including an upper space 7 b (space indicated by a broken line in FIG. 1) of the external space 6.
In addition, although this embodiment demonstrates the example in case the one booth 4 is formed, several booths may be formed combining the several panel 2. FIG. Further, the panel 2 may be used as a partition for partitioning the space with the single panel 2, or the wall surface 3 may be the panel 2 constituting another booth 4.

  Here, the detail of the panel 2 which concerns on this embodiment is demonstrated. Fig.2 (a) has shown the perspective view of the panel 2, FIG.2 (b) has shown sectional drawing which looked at the panel 2 of Fig.2 (a) from the side surface of the arrow X direction. As shown in FIG. 2A, the panel 2 includes a wall surface 2a (second wall surface) which is a partition wall with the booth 4 in the external space 6 shown in FIG. 1, and an external space 6 in the booth 4 shown in FIG. A box-shaped panel main body composed of a wall surface 2b (first wall surface) and a side wall surface 2c. In the present embodiment, the height of the wall surface 2b from the floor surface 1 is configured to be higher than the height of the wall surface 2a from the floor surface 1, and a panel indicated by P in FIG. 2 (b). The upper part of 2 is opened. Note that the height of the side wall surface 2c from the floor surface 1 may be the same as the height of the wall surface 2a from the floor surface 1, but when it is necessary to shield the propagation path of the masking sound through the side wall surface 2c. The height of the wall surface 2b may be the same.

Further, an installation base 2d for installing the speaker 10 is provided at the height of the wall surface 2a inside the panel body, that is, between the wall surface 2a and the wall surface 2b. A speaker 10 (sound emitting means) is provided. The wall surface 2a is substantially the same height as the speaker in the booth 4, and the installation base 2d is horizontally installed from the upper end of the wall surface 2a toward the wall surface 2b.
The speaker 10 converts a masking sound signal supplied from a sound emission control device (not shown) into a sound wave and emits a masking sound. The speaker 10 is installed such that the output direction of the sound wave of the masking sound is directly above or obliquely upward, that is, on the ceiling surface 5 side, and the direct masking sound emitted from the speaker 10 is applied to the ceiling surface 5. Incident.
In the present embodiment, the speaker 10 is installed such that the directivity axis of the speaker 10 faces the direction of the ceiling surface 5. However, when the speaker 10 is omnidirectional, it emits masking sound. As a sound emitting means, a member that physically controls directivity such as a reflector is provided in the sound emitting portion of the speaker 10 so that the direction is the direction of the ceiling surface 5 (directly above or obliquely upward). You may make it provide. Thus, the upper part opened in the panel 2 according to the present embodiment is a sound wave emission position by the speaker 10, and the emission direction in which the sound wave is emitted from the emission position to the outside of the panel 2 is the ceiling surface 5 side. ing.

  The propagation path of the masking sound when the masking sound is emitted from the speaker 10 and the sound emitted in the booth 4 to the external space 6 will be described with reference to FIG. For example, when a speaker utters a voice from the position of X height in the booth 4, the voice propagation path is a propagation path indicated by a broken-line arrow in FIG. In other words, the sound in the booth 4 is roughly divided to be reflected by the wall surface 3 toward the ceiling surface 5, reflected from the ceiling surface 5 and directed to the external space 6, and toward the ceiling surface 5. Y of the external space 6 by the propagation path A2 reflected by 5 toward the external space 6 and the propagation path A3 diffracted at the upper end portion of the wall surface 2b toward the external space 6 by diffracting toward the external space 6 Is transmitted to the position.

  On the other hand, the propagation path of the masking sound emitted from the speaker 10 is the propagation path indicated by the solid arrow in FIG. That is, the masking sound is roughly divided and reflected on the inner surface of the wall surface 2b (surface on the inner side of the panel 2) and directed toward the ceiling surface 5, and reflected on the ceiling surface 5 and propagated toward the external space 6. The light is transmitted to the position Y in the external space 6 by the path B1 and the propagation path B2 that is reflected by the ceiling surface 5 and directed to the external space 6 toward the ceiling surface 5.

Thus, since the speaker 10 is installed at a position lower than the upper end of the wall surface 2b, the propagation path of the masking sound directed into the booth 4 emitted from the speaker 10 is shielded by the inner surface of the wall surface 2b. Propagation of the masking sound to the booth 4 side is suppressed. That is, the portion of the wall surface 2b from the installation position of the speaker 10 to the upper end portion of the wall surface 2b functions as a shielding portion. Therefore, the speakers in the booth 4 do not have difficulty in hearing each other's voice due to the masking sound.
In addition, the direction (A1, A2) in which the conversation voice reflected on the ceiling surface 5 propagates to the external space 6 and the direction (B1, B2) in which the masking sound reflects on the ceiling surface 5 and propagates to the external space 6 are almost the same. Since the conversation 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 booth 4 and the masking sound are perceived at the position Y in the external space 6, and it becomes difficult for a person in the vicinity of Y in the external space 6 to hear the conversation voice in the booth 4.

In addition, when the speaker and the speaker 10 have a symmetrical positional relationship across the wall surface 2b, the speaker 10 is provided inside the panel 2 so as to be approximately the same height as the speaker in the booth 4, Compared with the case where the speaker 10 is provided at a low position close to the floor surface 1, the propagation paths of the conversational sound and the masking sound are substantially in the same direction, and the masking efficiency of the masking sound emitted to the external space 6 is further improved.
That is, when the speaker 10 is installed at a height close to the floor surface 1 in the panel 2, the directivity of the masking sound upward is enhanced by the space surrounded by the wall surface 2a, the wall surface 2b, and the wall surface 2c. Therefore, the propagation of the masking sound not only to the booth 4 but also to the external space 6 is suppressed, and the masking sound is less likely to reach the further away from the wall surface 2a in the external space 6. Therefore, in this case, the conversation voice that is directed by the speaker toward the external space 6 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 10 is provided at substantially the same height as the speaker in the booth 4 as in the present embodiment, the sound transmission characteristics such as the sound propagation direction, distance attenuation, and the degree of reverberation are related. Since the similarity (affinity) between the masking sound from the speaker 10 and the conversation voice uttered by the speaker is increased, the conversation voice is efficiently masked.

<Embodiment 2>
Next, Embodiment 2 according to the present invention will be described. 4A shows a perspective view of the panel according to the present embodiment, and FIG. 4B shows a cross-sectional view of the panel of FIG. 4A when viewed from the direction of the arrow X. . The panel 20 according to the present embodiment has a panel body in which the height from the floor surface 1 of the wall surface 2b serving as the partition wall in the booth 4 is higher than the wall surface 2a serving as the partition wall in the external space 6. This is different from the first embodiment in that the speaker 10 is provided on the installation base 2d provided at a predetermined position closer to the floor surface 1 than the upper end of the wall surface 2a. That is, in the present embodiment, the speaker 10 is installed at a position lower than the upper end of the wall surface 2a than in the case of the first embodiment. Hereinafter, in the configuration of the panel 20 of the present embodiment, a propagation path where the masking sound from the speaker 10 and the conversation voice in the booth 4 reach the external space 6 will be described with reference to FIG.

As in the first embodiment, when the speaker utters voice at the X position of the booth 4, the voice is propagated to the external space 6 side along the propagation path indicated by the broken-line arrow in FIG. That is, the conversation voice in the booth 4 is broadly divided into a propagation path A1 reflected from the wall surface 3 toward the ceiling surface 5, reflected from the ceiling surface 5 and directed to the external space 6, and toward the ceiling surface 5, to the ceiling surface. Y of the external space 6 is reflected by the propagation path A2 reflected by the surface 5 toward the external space 6 and the propagation path A3 diffracted at the upper end portion of the wall surface 2b toward the external wall 6 by being diffracted toward the external wall 6. Is transmitted to the position.
On the other hand, the masking sound emitted from the speaker 10 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 wall surface 2b and directed toward the ceiling surface 5, reflected from the ceiling surface 5 and directed to the external space 6, and the direction of the ceiling surface 5. Is transmitted to the position Y in the external space 6 by the propagation path B2 reflected by the ceiling surface 5 toward the external space 6 and the propagation path B3 diffracted by the upper end portion of the wall surface 2a and traveling toward the external space 6. .

As indicated by the propagation path B1, the masking sound emitted from the speaker 10 toward the booth 4 is shielded by the inner surface of the wall surface 2b. It is not difficult to hear each other's voice. That is, the portion of the wall surface 2b from the installation position of the speaker 10 to the upper end portion of the wall surface 2b functions as a shielding portion. In the present embodiment, the conversational voice propagated to the external space 6 through the propagation paths A1 and A2 and the masking sound propagated to the external space 6 through the propagation paths B1 and B2 have substantially the same propagation direction and frequency characteristics. Since the conversation voice propagated to the external space 6 through the propagation path A3 and the masking sound propagated to the external space 6 through the propagation path B3 have substantially the same propagation direction and frequency characteristics, the conversation leaked into the external space 6 The voice is efficiently masked by the masking sound, and it becomes difficult for the person in the external space 6 to hear the conversation voice.
Further, by providing the speaker 10 at a position below the upper end of the wall surface 2a, a masking sound is once emitted in the space sandwiched between the wall surface 2a and the wall surface 2b, and the masking sound is emitted from the opening above the panel 20. Since sound is emitted to the external space 6, even when the number of speakers 10 is small, the feeling that the masking sound is localized at the position of the speaker 10 is reduced, and the masking sound can be heard from the entire opening above the panel 20. Can be obtained. In addition, since the number of speakers 10 can be reduced, the device configuration can be simplified and the cost can be reduced.

  In the present embodiment, the speaker 10 is disposed in the panel 20 so that the output direction of the sound wave of the masking sound by the speaker 10 is the direction of the ceiling surface 5, but the speaker 10 is arranged from the upper end of the wall surface 2 a. When provided at a lower position, the speaker 10 may be installed such that the output direction of the sound wave of the masking sound by the speaker 10 is the direction of the wall surface 2a, the wall surface 2b, or the wall surface 2c. Even if it arrange | positions in this way, the masking sound from the speaker 10 is reflected by the wall surface 2a, the wall surface 2b, and the wall surface 2c, and the reflected sound goes to the direction of the ceiling surface 5. FIG. Accordingly, the masking sound is emitted so that the conversation voice in the booth 4 is in the same direction as the direction in which the conversation voice propagates to the external space 6, so that it is difficult for the person in the external space 6 to hear the conversation voice. Further, by arranging the speaker 10 in this way, the masking sound once emitted in the space surrounded by the wall surface 2a, the wall surface 2b, and the wall surface 2c is emitted from the entire opening above the panel 20 to the external space 6. Since the sound is produced, the feeling of localization of the masking sound at the position of the speaker 10 can be further reduced.

<Embodiment 3>
Next, a panel according to Embodiment 3 of the present invention will be described. FIG. 6 shows a cross-sectional view of the panel according to the present embodiment. In the panel 21 of the present embodiment, the height from the floor surface 1 of the wall surface 21a (second wall surface) serving as the partition wall in the external space 6 and the wall surface 21b (first wall surface) serving as the partition wall in the booth 4 is the same. The second embodiment is different from the second embodiment in that a shielding member 21c is provided inside the panel body of the panel 21 and that the panel body has the panel body. The shielding member 21c has an installation part 211 for installing the speaker 10, a leg part 212, and a shielding part 213, and is sandwiched between the wall surface 21a and the wall surface 21b. The installation part 211 is provided at a predetermined height so that the speaker 10 is installed below the upper end of the wall surface 21a, and the shielding part 213 is shielded when the shielding member 21c is attached inside the panel 21. The upper end portion of the portion 213 is configured to be higher than the upper end portion of the wall surface 21a along the wall surface 21b.

In the present embodiment, when the masking sound is emitted from the speaker 10, the propagation path of the masking sound and the conversational sound emitted in the booth 4 is the same as that of the second embodiment. That is, the masking sound directed toward the booth 4 is shielded by the shielding part 213, reflected by the shielding part 213, directed toward the ceiling surface 5, reflected by the ceiling surface 5, and propagated toward the external space 6. . The masking sound directed toward the ceiling surface 5 is reflected by the ceiling surface 5 and propagated to the external space 6, and the masking sound directed toward the external space 6 is diffracted at the upper end portion of the wall surface 2 a of the panel 2. Propagated to the external space 6. Further, the conversation voice directed to the wall surface 3 among the conversation voices uttered at the booth 4 is reflected by the wall surface 3 toward the ceiling surface 5, reflected by the ceiling surface 5 and propagated to the external space 6. Further, the conversational sound toward the ceiling surface 5 is reflected by the ceiling surface 5 and travels toward the external space 6, and the conversational sound toward the wall surface 2 b is diffracted at the upper end portion of the shielding part 213 and propagated to the external space 6. The
As described above, even when the panel 21 according to the present embodiment is used, the propagation direction of the conversational sound emitted from the booth 4 and the propagation direction of the masking sound emitted from the speaker 10 are substantially the same direction. Since the conversation voice leaked to the external space 6 is efficiently masked by the masking sound, it is difficult for the person in the external space 6 to hear the conversation voice generated in the booth 4.

<Embodiment 4>
Next, a panel according to Embodiment 4 of the present invention will be described. FIGS. 7A and 7B are cross-sectional views of the panel according to the present embodiment. The panel 22 in the present embodiment is a panel in which a wall surface 22a (second wall surface) serving as a partition wall in the external space 6 and a wall surface 22b (first wall surface) serving as a partition wall in the booth 4 are configured at the same height. It is common with Embodiment 3 by the point which has a main body. Further, an adhesive member such as a hook or loop-shaped hook-and-loop fastener is attached to a certain range from the upper end of the wall surface 22a and the wall surface 22b on the inner surface of the wall surface 22a and the wall surface 22b of the panel body constituting the panel 22. The third embodiment is different from the third embodiment in that a leg member is not provided and a detachable shielding member 22c is provided with respect to a surface fastener provided on the wall surface 22a and the wall surface 22b.

As shown in FIG. 7A, the shielding member 22c is an L-shaped member having an installation part 221 for installing the speaker 10 and a shielding part 222 for shielding a masking sound emitted from the speaker 10. It is configured. On the surface of the shielding member 22c in contact with the wall surface 22a or the wall surface 22b, a hook or loop-shaped surface fastener for bonding to a surface fastener bonded to each surface inside the wall surface 22a and the wall surface 22b is bonded. (Not shown).
In the present embodiment, along the wall surface 22b (or wall surface 22a), the upper end portion of the shielding portion 222 when the shielding member 22c is attached to the panel body is higher than the upper end portion of the wall surface 22a (or wall surface 22b). A shielding member 22c is provided. In addition, although this embodiment demonstrates the example which bonds the shielding member 22c to the inner wall of the panel 22 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 panel 22, double-sided tape, You may make it attach the shielding member 22c to the inner wall of the panel 22 using adhesive members, such as a magnet.

  Since the panel 22 in this embodiment is provided with the detachable shielding member 22c, when shielding the masking sound from propagating to the booth 4 side, the shielding plate 22c is provided as shown in FIG. What is necessary is just to affix on the inner surface of the wall surface 22b. Further, for example, when a booth other than the external space 6 is formed in the space where the wall surface 22a is a partition wall, a booth shown in FIG. In this way, the shielding member 22c may be attached to the inner surface of the wall surface 22a. As described above, since the shielding member 22c can be freely attached to the wall surface 22a or the wall surface 22b, the direction in which the masking sound is shielded can be easily switched according to the use situation of the space partitioned by the panel 22.

<Modification>
As mentioned above, although embodiment of this invention was described, this invention is not restricted to embodiment mentioned above, The following modifications are also contained.
(Modification 1)
In the above-described embodiment, the example in which the speaker 10 as the sound emitting means is installed inside the panel main body of the panel 2 has been described. However, the sound emitting means may be provided with the speaker 10 installed inside a partially opened box. It may be configured to be provided inside the panel body. Here, an example of the panel in this case is shown in FIG. FIG. 8A is a cross-sectional view of the panel 23 according to this modification. As shown in FIG. 8A, the panel 23 according to this modification is common to the second embodiment except that a box 23c is provided in the panel 23. The box 23c has a part of each side surface facing the upper surface and the wall surfaces 23a (second wall surface) and 23b (first wall surface) when the box 23c is installed in the panel body. Inside the box 23c, the speaker 10 is installed so that the surface direction different from the surface on which the opening of the box 23c is provided is the output direction of the sound wave of the masking sound from the speaker 10. In this modification, the speaker 10 is installed such that the sound wave output direction of the speaker 10 is the direction of the side wall surface excluding the wall surfaces 23 a and 23 b of the panel 23. That is, the speaker 10 is provided in the box 23c so that the opening of the box 23c and the sound emitting direction (directing axis) of the speaker 10 do not coincide.

The masking sound emitted from the box 23c and emitted from the opening on the upper surface is directed toward the ceiling surface 5. Further, the masking sound emitted in the box 23c and radiated from the opening on the side surface is directed toward the ceiling surface 5 while being reflected between the wall surface 23a and the wall surface 23b and the side surface of the box 23c. The masking sound reflected by the ceiling surface 5 is propagated to the external space 6 in substantially the same direction as the direction in which the conversation voice from the booth 4 propagates to the external space 6 as in the above-described embodiment.
In this modification, since the opening of the box 23c and the sound output direction (directing axis) of the speaker 10 do not coincide with each other, the direct sound of the masking sound emitted from the speaker 10 is outside the panel 23. Is not emitted directly. Therefore, the feeling of localization of the masking sound at the position of the speaker 10 is reduced, and the conversation voice propagated from the booth 4 can be efficiently masked without giving a feeling of strangeness of the masking sound to a person near the wall surface 23a.

(Modification 2)
Further, in the above-described modification 1, the example in which the box 23c provided with the speaker 10 is provided inside the panel body of the panel 23 has been described. However, as illustrated in FIG. The external wall surface 23a (second wall surface) may be externally installed. In this case, an adhesive member such as a hook or loop-shaped hook-and-loop fastener is provided at a position lower than the upper end of the wall surface 23a, and the box 23 is placed so that the opening (not shown) of the box 23c is in the direction of the ceiling surface 5. It installs and it is comprised so that an opening part may not be provided in the other surface of the box 23c except the surface in which the said opening part was provided. By providing the box 23c in which the speaker 10 is installed at a position lower than the upper end portion of the wall surface 23a, the portion of the wall surface 23a from the position of the box 23c to the upper end of the wall surface 23a functions as a shielding portion.
When the sound wave of the masking sound is output from the speaker 10 provided inside the box 23c, the masking sound is emitted from the opening provided in the box 23c toward the ceiling surface 5, and the direction of the wall surface 23b, that is, the booth. 4 is shielded by the wall surface 23a, and a masking sound is emitted to the external space 6 side.
In this case, the heights of the upper end portions of the wall surface 23a and the wall surface 23b may be the same, and the upper surface portion of the panel 23 does not need to be opened. Further, the speaker 10 itself is externally attached to the wall surface 23a of the panel 23 so that the output direction of the sound wave of the masking sound by the speaker 10 is the direction of the ceiling surface 5 without placing the speaker 10 in the box 23c. May be.

(Modification 3)
In the above-described embodiment, the example in which two speakers 10 are provided in the panel body and the sound emission direction of the masking sound only on one wall surface side of the panel body is shielded has been described. You may comprise as follows. The panel body of the panel 24 shown in FIG. 9 has a wall surface 24a (second wall surface), a wall surface 24b (first wall surface), and a side wall surface 24c having the same height from the floor surface, and the wall surface 24a, the wall surface 24b, and the side wall surface. An installation base 241 for installing the speakers 10L and 10R is provided in the upper part of 24c. The speakers 10 </ b> L and 10 </ b> R are installed on the installation table 241 so that the output direction of the sound wave of the masking sound is on the ceiling surface 5 side, similarly to the speaker 10 of the embodiment described above.

In addition, three partition plates 241c having the same width as the side wall surface 24c are installed in parallel with the side wall surface 24c at both end portions and intermediate positions in the longitudinal direction of the installation table 241. A shielding portion 24d1 and a shielding portion 24d2 are provided between the wall surface 24b and the wall surface 24a. The upper portion of the speaker 10L surrounded by the shielding portion 24d2 and the partition plate 241c and the wall surface 24a side are opened, and the masking sound from the speaker 10L is emitted from this opening portion. Further, the upper portion of the speaker 10R surrounded by the shielding portion 24d1 and the partition plate 241c and the wall surface 24b side are opened, and the masking sound from the speaker 10R is emitted from this opening portion.
The shielding portion 24d1 shields the propagation of masking sound from the speaker 10R provided on the shielding portion 24d1 side toward the wall surface 24a, and the shielding portion 24d2 is provided on the wall surface 24b side from the speaker 10L provided on the shielding portion 24d2 side. The propagation of the masking sound toward is shielded.

  In this modification, when masking a conversational voice emitted in one space where the wall surface 24b is a partition wall, a masking sound is output from the speaker 10L, thereby propagating the masking sound toward the one space. A masking sound can be emitted to the other space side where the path is shielded and the wall surface 24a is a partition wall. Further, when masking the conversational voice uttered in the other space, the masking sound is output from the speaker 10R to shield the propagation path of the masking sound toward the other space, and the one space side A masking sound can be emitted. Therefore, even if there is a layout change after replacing the booth space and the external space after the panel 24 is installed, the masking sound is emitted in either the wall surface 24a or the wall surface 24b without changing the orientation of the panel 24. Can do. When a plurality of booths 4 are formed using the panel 24, masking sound waves may be output from each of the speakers 10L and 10R, and the masking sounds may be emitted to the respective booths. Note that a plurality of masking sounds may be emitted from one panel 24 by changing the masking sound emitted from the speakers 10L and 10R.

(Modification 4)
In the second embodiment described above, the example in which the upper surface portion of the panel 2 is opened has been described. However, as shown in FIG. 10, not only the upper part of the panel body constituting the panel 25 but also the wall surface 25a (first) of the panel body. A plurality of slit portions or openings S may be provided so that the side of the (two wall surfaces) is the emission position of the masking sound wave.
With such a configuration, since the masking sound propagated from the opening portion on the upper surface of the panel 25 and the masking sound propagated from the slit portion or the opening portion S are mixed, the masking sound emitted from the slit portion or the opening portion S can be reduced. The feeling of localization can be eased, and the masking sound can be emitted to the external space 6 without a sense of incongruity.

(Modification 5)
In the embodiment and the modification described above, the example in which the speaker 10 is installed so that the output direction of the sound wave of the masking sound by the speaker 10 is the direction of the ceiling surface 5 has been described, but the speaker 10 is installed inside the panel body. If the direction in which the sound wave of the masking sound of the speaker 10 is emitted from the inside of the panel body to the outside of the panel body is the direction toward the ceiling surface 5, the sound wave output direction of the speaker 10 is different from the direction of the ceiling surface 5. You may set the direction of the speaker 10 so that it may become. For example, as shown in FIG. 11, the speaker 10 is placed on the bottom surface in the panel body of the panel 26 whose upper portion is opened so that the sound wave output direction of the speaker 10 is the direction of the wall surface 26 b (first wall surface). It may be installed. When the speaker 10 is installed in this way, the sound wave of the masking sound output from the speaker 10 is repeatedly reflected on the inner surfaces of the wall surfaces 26a (second wall surface) and 26b as indicated by the arrow T. 26 is output from the upper part of 26 toward the ceiling surface 5 and toward the wall surface 26a. Thereby, the propagation path of the masking sound toward the wall surface 26b is shielded, and the masking sound can be emitted to the wall surface 26a side.

(Modification 6)
In the above-described third embodiment, the example in which the detachable L-shaped shielding member 22c is provided on the panel 22 has been described. However, any configuration that can regulate the shielding direction that shields the masking sound from the speaker 10 will be described. Not limited to. An example of such a panel will be described with reference to FIG. FIG. 12 shows a cross-sectional view of a panel according to this modification. As shown in FIG. 12A, the speaker 10 may be provided at a predetermined position inside the panel 27, and a shielding member 27 c that covers the upper surface portion of the panel 26 may be provided.
The shielding member 27c is configured to be detachable at each upper end portion of the wall surface 27a (second wall surface) and the wall surface 27b (first wall surface). For example, when the shielding member 27c is mounted on the upper end portion of the wall surface 27a and the shielding member 27c is lifted in the ceiling surface direction, the upper surface portion of the panel 27 is opened as shown in FIG. Is disposed at the upper end of the wall surface 27a. In this state, the wall surface 27a side is higher than the wall surface 27b, and the masking sound propagation path toward the wall surface 27a side is shielded by the shielding member 27c.
Further, 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 wall surface 27b, as shown in FIG. 12C, the upper surface portion of the panel 27 is opened and the shielding member 27c is opened. Is disposed at the upper end of the wall surface 27b. In this state, the wall surface 27b side becomes higher than the wall surface 27a, and the propagation path of the masking sound toward the wall surface 27b side is shielded by the shielding member 27c.

(Modification 7)
In the embodiment and the modification described above, when a masking sound is emitted from the speaker 10 provided on the panel, for example, a sound emission control device that causes the speaker 10 to emit a masking sound inside or outside the panel body is provided. Each speaker 10 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 10 in this case is shown in FIG. As shown in FIG. 13, 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 masking sound signal under the control of the control unit 304, and the operation unit 302 switches on / off of the power of the sound emission control device 30. An operation button, an operation button for changing the volume value of the masking sound to be emitted from the speaker 10, and the like are provided, and a function of outputting an operation signal indicating a switch operation received from the user to the control unit 304 is provided.

  Under the control of the control unit 304, the signal processing unit 303 performs predetermined signal processing on the masking sound signal indicating the masking sound output by the sound source 301, and outputs the masking sound signal and information indicating the volume value of the masking sound. It has a function of sending to each speaker 10. 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 10 includes an amplifier, and performs a predetermined amplification process on the masking sound signal transmitted from the sound emission control device 30 to emit 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 a masking sound in the sound source 301 and outputs the masking sound to the signal processing unit 303. The masking sound signal that has been subjected to signal processing is output to each speaker 10. Each speaker 10 performs a predetermined amplification process on the masking sound signal output from the sound emission control device 30 to emit a masking sound.
Further, 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 sends each speaker 10 Stops masking sound signal output to.

(Modification 8) In the above-described embodiment, the example in which the sound wave output direction of the speaker 10 provided in the panel body of the panel 2 is aligned with the direction of the ceiling surface 5 has been described. For example, FIG. Thus, the speaker 10 is inclined with respect to the direction (vertical direction) of the wall surface 2a (second wall surface) or the wall surface 2b (first wall surface) so that the sound emission direction of the masking sound emitted from the speaker 10 is on the ceiling surface 5 side. And the speaker 10 may be arranged so that the output direction of the sound wave of the masking sound (directing axis of the speaker 10) is on the ceiling surface 5 side (crosses the ceiling surface 5). As shown in FIG. 14, the direction of the propagation path A toward the external space 6 and the direction of the propagation path B of the masking sound are substantially overlapped with the conversation sound uttered from the booth 4, and the speaker 10 is propagated at a predetermined angle from the vertical direction. By arranging the direction of the path B and the direction of the directional axis of the speaker 10 to coincide with each other, the level of the masking sound toward the reflection point of the ceiling surface 5 reaching the sound receiving point Y increases, and the booth in the external space 6 The conversation voice in 4 can be made harder to hear. Further, the speaker 10 may be configured as a speaker array by a plurality of speakers. In this case, the sound beam direction (sound emitting direction) of the speaker array only needs to face the ceiling surface 5 side. Furthermore, in the case where the speaker 10 is configured using a single speaker or speaker array, when the output direction of a plurality of sound waves is set, any output direction only needs to face the ceiling surface 5 side.

1 ... floor surface, 2, 20, 21, 22, 23, 24, 25, 26, 27 ... panel, 3 ... wall surface, 4 ... booth, 5 ... ceiling surface, 6. ..External space, 10 ... speaker, 21c, 22c ... shielding member, 24d1, 24d2, 27c, 213, 222 ... shielding part, 23c ... box, 30 ... sound emission control device, 301 ... Sound source, 302 ... Operation unit, 303 ... Signal processing unit, 304 ... Control unit

Claims (5)

A partition panel body having a height that does not contact the ceiling surface when installed on the floor, and having a first wall surface and a second wall surface facing the first wall surface;
Sound emission means provided between the first wall surface and the second wall surface of the panel main body and converting a supplied masking sound signal into a sound wave and outputting the sound wave;
The panel body has an emission position where the sound wave output from the sound emitting means is emitted to the outside of the panel body above the panel body, and among the propagation paths of the sound wave from the emission position, A partition panel characterized in that the first wall surface of the panel main body has a shielding portion that shields a space serving as a partition and a propagation path toward an upper space above the space. The upper end portion of the panel body is configured such that the first wall surface is higher than the second wall surface and the upper surface of the panel body is opened, and the opening portion is the emission position.
The sound emitting means is provided at a position closer to the floor surface than the upper end portions of the first wall surface and the second wall surface of the panel body, and the sound wave output direction is provided on the ceiling surface side,
2. The partition panel according to claim 1, wherein the shielding portion includes a portion of the first wall surface from an installation position of the sound emitting means to an upper end portion of the first wall surface. The upper end portion of the panel body is configured such that the first wall surface is higher than the second wall surface and the upper surface of the panel body is opened, and the opening portion is the emission position.
The sound emitting means is provided at the same height as the upper end of the second wall surface, and is provided so that the output direction of the sound wave is on the ceiling surface side.
2. The partition panel according to claim 1, wherein the shielding portion includes a portion of the first wall surface from an installation position of the sound emitting means to an upper end portion of the first wall surface. The upper surface of the panel body is opened, the opening portion is the emission position,
The shielding portion is detachably provided along the first wall surface, and is formed such that the upper end portion of the shielding portion when provided along the first wall surface is higher than the upper end portion of the second wall surface. The partition panel according to claim 1, wherein the partition panel is formed. A partition panel body having a height that does not contact the ceiling surface when installed on the floor, and having a first wall surface and a second wall surface facing the first wall surface;
And a sound emitting means for converting the supplied masking sound signal into a sound wave and outputting the sound wave,
The sound emitting means is arranged on the floor from the upper end of the second wall surface so that the sound wave output direction is on the ceiling surface side on the surface of the second wall surface on the space side where the second wall surface becomes a partition wall. Provided near the surface,
The panel main body is configured such that, in a portion from the position where the sound emitting means is provided to the upper end of the second wall surface, the first wall surface of the propagation path of the sound wave output by the sound emitting means is a partition wall. A partition panel characterized by shielding a space formed and a propagation path toward an upper space above the space.

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