JP5325488B2 - Sound masking equipment - Google Patents

Description

  The present invention relates to a sound masking facility that suppresses a conversation or a sound of an adjacent room from being heard and transmitted when a floor is divided into a plurality of rooms.

  In an office building or the like, a floor is often divided into a plurality of rooms by partitions, and the partitions are also distributed in various markets. For example, the partition described in the following Non-Patent Document 1 is provided with a space between which a transparent glass plate or acrylic plate can be fitted at the top in order to share an illuminating lamp in a plurality of rooms. When this partition is used, if it is desired to share an air conditioner, a fire protection sprinkler, etc. in a plurality of rooms, it is sufficient to leave the transparent plate between the columns and keep it open.

If rooms are connected to each other through a field, conversations and noises are likely to leak between adjacent rooms, which may make them feel noisy or may interfere with the protection of privacy or information security. There is. As a means for alleviating or solving such problems, a sound masking system using a masking effect and a cocktail party effect has been developed. The system described in Non-Patent Document 2 described below masks noise by emitting masking sounds such as pink noise and white noise from a speaker installed at intervals of several meters on the ceiling of a room.
“Planner Wall AP Series”, KOKUYO General Catalog 2008 Edition, KOKUYO Corporation, December 2007, p. 231 “Sound Masking System”, KOKUYO General Catalog 2008 Edition, KOKUYO Corporation, December 2007, p. 223

  However, even if the above-described sound masking system is adopted, the effect may still be insufficient.

  The present invention is intended to effectively suppress the conversation and noise generated in the adjacent room from being heard and transmitted under the condition that the rooms communicate with each other directly under the ceiling board. The purpose of the period.

In the present invention, a sound masking sound source that outputs sound for sound masking to a plurality of rooms laid by a partition placed above or near the ceiling plate and arranged below the top plate, A sound-absorbing material that absorbs noise, such as conversation and noise, provided at a portion corresponding to the space between the ceiling plate and the partition formed in the ceiling plate, and in the ceiling space, The sound masking equipment is configured such that the sound absorbing material is provided only in the corresponding part, and the region where the sound absorbing material is not provided exists in the part deviated from the space between the inside of the room . Here, the partition is a concept including both a high partition whose total height reaches the vicinity of the ceiling and a low partition whose total height is lower than the ceiling. The space between the columns is a space that exists between the upper edge of the partition faceplate that shields one room from another room and the ceiling board and communicates with each other. The space between the upper partition of the high partition removed and opened, and the gap between the upper edge of the low partition and the ceiling plate are both interspace.

  According to the present invention, it is possible to absorb and reduce the noise transmitted from one room to another room through the interspace, for example, by being reflected by hitting the ceiling board. Therefore, compared with the case where the sound masking system is used alone, the intelligibility of the conversation in the adjacent room and the sound of sound is further reduced.

  The sound absorbing material can absorb not only noise but also masking sound. Therefore, in the ceiling panel, a sound absorbing material is provided only in a portion corresponding to the space between the spaces, and there is a region where the sound absorbing material is not provided in a portion biased inward of the room from the space between the spaces. Preferably it is. Then, the masking sound can propagate through the region to the room, and the loss of the sound masking effect due to the presence of the sound absorbing material is avoided. Thereby, even if the power of the masking sound output from the sound source is not high, a sufficient sound masking effect can be obtained.

  If a sound masking sound source is mounted in the partition, the sound masking effect in the room is reinforced.

  In addition, if it further comprises a sound absorbing material that is provided on the wall facing the space between the spaces, and absorbs noise such as conversations and noises, the sound that has passed through the space between the spaces can be absorbed by the sound absorbing material. The intelligibility of sounds and noises is further reduced.

  According to the present invention, it is possible to effectively suppress a conversation or a noise generated in an adjacent room from being heard and transmitted under the condition that the rooms communicate with each other directly under the ceiling board. Can do.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1 and FIG. 2, the sound masking equipment of the present embodiment is arranged below the ceiling board 5 and divides the floor into a plurality of rooms R 1 and R 2 and also has a space 7 between the ceiling board 5. A partition 1 to be formed, a sound source 2 for sound masking that outputs sound S for sound masking to a plurality of rooms R1 and R2 laid above the ceiling plate 5, that is, behind the ceiling and partitioned by the partition 1, and the ceiling plate 5 is a sound-absorbing material 3 that is provided in a portion corresponding to the inter-column space 7 in FIG.

  The partition 1 is a high partition where the uppermost face plate is removed and the space 7 is opened, or a low partition where the overall height is low and a gap 7 is formed between the ceiling plate 5 and the partition. In the illustrated example, the floor between the opposing wall surfaces 6 is divided into two rooms R1 and R2.

  The sound masking sound source 2 is mainly composed of a speaker that emits a sound S that has an effect of masking a sound generated in conversation or work of another person, an operation sound of various devices, and the like. Suitable masking sounds S are pink noise (noise whose power tends to be inversely proportional to the frequency at least in the audible range), white noise (at least in the audible range, the power tends to be almost uniform regardless of the frequency). Noise) or the like, but it is also possible to output a sound S in which an environmental sound such as a bird's roar or background music is superimposed on the noise. At least one speaker 2 is installed per room. Each speaker 2 is connected to a sound reproducing device (not shown) for reproducing the sound S output through the speaker 2, that is, an audio device, a personal computer, and the like. In this embodiment, the speaker 2 emits a masking sound S upward. The masking sound S once hits the building slab and is reflected, and diffuses over a wide range in the rooms R1 and R2 below the ceiling board 5.

  The sound absorbing material 3 plays a role of absorbing and reducing noise transmitted between the rooms R <b> 1 and R <b> 2 via the interspace 7. The sound absorbing material 3 is made of, for example, rock wool, glass wool, urethane foam or the like. The sound absorbing material 3 extends along the extending direction of the partition 1. In terms of noise absorption, it is more effective to provide a wide range of the sound absorbing material 3. On the other hand, since the speaker 2 exists on the ceiling board 5, if the sound absorbing material 3 is made too large, the propagation of the masking sound S into the rooms R1 and R2 is blocked. Therefore, in the present embodiment, the width L1 of the ceiling plate 5 or the face plate of the partition 1 that the person H1 located in the seated posture near the wall 6 facing the face plate of the partition 1 can see through the space 7 is provided. The sound absorbing material 3 is placed in the room R1 from directly above the partition 1 by a dimension corresponding to the width L2 of the ceiling plate 5 that the person H2 located in the standing position near the facing wall 6 can see through the interspace 7. It extends toward the inside of R2 (in other words, the normal direction of the face plate of the partition 1). By setting the width dimensions L1 and L2 in this way, the area is sufficient to absorb noise transmitted from the one room R1 / R2 to the other room R2 / R1 by being reflected by the ceiling board 5 and reflected. A sound absorbing material 3 can be provided. The widths L1 and L2 are generally 600 mm to 1000 mm, although depending on the size of the rooms R1 and R2 and the height of the ceiling.

  In addition, in this embodiment, the sound-absorbing material 4 is also provided at a portion of the wall 6 that faces the inter-space 7. However, the sound absorbing material 4 is not essential.

  According to the sound masking equipment of this embodiment, the sound absorbing materials 3 and 4 transmit noise transmitted from one room R1 / R2 to another room R2 / R1 via the interspace 7 by being reflected by the ceiling board 5 or the like. Since the sound is absorbed and reduced, the degree of intelligibility of conversation and sound in the next room is greatly reduced as compared with the case where the sound masking system is used alone.

  In the ceiling plate 5, the sound absorbing material 3 is provided only in a portion corresponding to the inter-space 7, and the sound-absorbing material 3 is not provided in a portion deviated inward of the rooms R 1 and R 2 from the inter-space 7. Therefore, the masking sound S emitted from the sound source 2 passes through the area and propagates appropriately to the rooms R1 and R2. That is, loss of the sound masking effect due to the presence of the sound absorbing material 3 is avoided. Therefore, even if the power of the masking sound S output from the sound source 2 is not high, a sufficient sound masking effect can be obtained.

  The present invention is not limited to the embodiment described in detail above. In the example shown in FIG. 3, the speaker 2 that radiates the masking sound S downward rather than upward is installed above or near the ceiling plate 5.

  In the example shown in FIG. 4, in the ceiling plate 5, the sound absorbing material 3 is provided over a wide area of the ceiling plate 5 as well as a portion corresponding to the interspace 7. Then, a hole is made in a part of the sound absorbing material 3, and the speaker 2 that emits the masking sound S downward is inserted into the hole (or the diaphragm of the speaker 2) so as to face the ceiling plate 5. doing. When the speaker 2 that radiates the masking sound S upward is installed behind the ceiling, the masking sound S may not be sufficiently transmitted into the rooms R1 and R2 due to the influence of an existing duct or the like on the back of the ceiling. In some cases, the speaker 2 cannot be placed away from the sound absorbing material 3 because the rooms R1 and R2 are small. If the structure shown in FIG. 3 or FIG. 4 is taken, these troubles can be avoided.

  In the example shown in FIG. 5, a speaker 8 as a sound masking sound source is also mounted inside the partition 1. The interior of the partition 1 is a cavity, and the speaker 8 radiates the masking sound S downward in the cavity. The cavity of the partition 1 communicates with the outside at the lower end of the partition 1, and the masking sound S diffuses into the rooms R 1 and R 2 from the lower end of the partition 1. An area located above the speaker 8 in the cavity is filled with a sound absorbing material 9.

  Further, in the example shown in FIG. 5, when the sound absorbing material 3 is provided in the portion corresponding to the interspace 7, the sound absorbing material 3 is not attached to the lower surface of the ceiling plate 5, but a hole is formed in a part of the ceiling plate 5. The sound-absorbing material 3 is embedded there. Or you may make it replace the ceiling board 5 of the site | part corresponding to the interspace 7 with the sound-absorbing ceiling board containing the sound-absorbing material 3 from the normal ceiling board 5. FIG.

  Other specific configurations of each part can be variously modified without departing from the spirit of the present invention.

The perspective view which shows the sound masking equipment of one Embodiment of this invention. Front sectional view showing the sound masking equipment. The front sectional view which shows one of the modifications of this invention. The front sectional view which shows one of the modifications of this invention. The front sectional view which shows one of the modifications of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Partition 2 ... Sound source for sound masking 3, 4 ... Sound-absorbing material 5 ... Ceiling board 6 ... Wall 7 ... Interspace

Claims (4)

A sound masking sound source that outputs sound for sound masking to a plurality of rooms that are laid above or near the ceiling plate and partitioned by partitions arranged below the top plate;
In the ceiling plate, provided in a portion corresponding to a space between the ceiling plate and the partition, and a sound absorbing material for absorbing noise such as conversation and noise ,
In the ceiling board, a sound masking facility in which a sound absorbing material is provided only at a portion corresponding to the space between the spaces and a region where the sound absorbing material is not provided at a portion biased inward of the room from the space between the spaces. . A partition which is arranged below the ceiling plate, partitions the floor into a plurality of rooms and forms a space between the ceiling plate,
A sound masking sound source that outputs sound for sound masking to a plurality of rooms that are laid above or near the ceiling panel and partitioned by the partition;
A sound absorbing material that is provided in a portion corresponding to the space between the ceiling plate and absorbs noise such as conversation and noise ;
In the ceiling board, a sound masking facility in which a sound absorbing material is provided only at a portion corresponding to the space between the spaces and a region where the sound absorbing material is not provided at a portion biased inward of the room from the space between the spaces. . The sound masking equipment according to claim 2, wherein a sound masking sound source is mounted inside the partition . The sound masking equipment according to claim 1, further comprising a sound absorbing material provided on a wall facing the space between the columns and absorbing noise such as conversation and noise .

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